1
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Geng HX, Kong FZ, Wang JX, Zhang QC, Li F, Hong X, Song MJ, Lian Z, Cai YL, Yu RC. An unusual winter bloom of dinoflagellates with notable damage to kelp cultivation around Shandong peninsula, China. MARINE ENVIRONMENTAL RESEARCH 2024; 201:106687. [PMID: 39173207 DOI: 10.1016/j.marenvres.2024.106687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 06/24/2024] [Accepted: 08/12/2024] [Indexed: 08/24/2024]
Abstract
In the coastal waters around Shandong peninsula, an unprecedented winter bloom of dinoflagellates Gonyaulax polygramma and Akashiwo sanguinea occurred in 2021 from late November to early December. The bloom affected a wide area of coastal waters extending from west to east along the northern Shandong peninsula and had a devastating blow to the kelp cultivation industry. Based on the remote-sensing data, the initiation of the bloom was traced back to the region adjacent to the mouth of the Yellow River in Laizhou Bay, where enhanced freshwater discharge from the Yellow River was recorded from September to November. It's proposed that the increased precipitation in the Yellow River basin associated with northward extension of the precipitation band in China could be an important reason for this winter bloom. This unusual winter bloom around Shandong peninsula highlights the potential risks of harmful algal blooms and their impacts on coastal ecosystems under the background of climate change.
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Affiliation(s)
- Hui-Xia Geng
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Fan-Zhou Kong
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Jin-Xiu Wang
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Qing-Chun Zhang
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Fang Li
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Xin Hong
- Marine College, Shandong University, Weihai, 264209, China
| | - Min-Jie Song
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Ziru Lian
- Marine College, Shandong University, Weihai, 264209, China
| | - Yu-Lin Cai
- College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Ren-Cheng Yu
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; University of Chinese Academy of Sciences, Beijing, 100039, China.
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2
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Yang Y, Tilman D, Jin Z, Smith P, Barrett CB, Zhu YG, Burney J, D'Odorico P, Fantke P, Fargione J, Finlay JC, Rulli MC, Sloat L, Jan van Groenigen K, West PC, Ziska L, Michalak AM, Lobell DB, Clark M, Colquhoun J, Garg T, Garrett KA, Geels C, Hernandez RR, Herrero M, Hutchison WD, Jain M, Jungers JM, Liu B, Mueller ND, Ortiz-Bobea A, Schewe J, Song J, Verheyen J, Vitousek P, Wada Y, Xia L, Zhang X, Zhuang M. Climate change exacerbates the environmental impacts of agriculture. Science 2024; 385:eadn3747. [PMID: 39236181 DOI: 10.1126/science.adn3747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 08/02/2024] [Indexed: 09/07/2024]
Abstract
Agriculture's global environmental impacts are widely expected to continue expanding, driven by population and economic growth and dietary changes. This Review highlights climate change as an additional amplifier of agriculture's environmental impacts, by reducing agricultural productivity, reducing the efficacy of agrochemicals, increasing soil erosion, accelerating the growth and expanding the range of crop diseases and pests, and increasing land clearing. We identify multiple pathways through which climate change intensifies agricultural greenhouse gas emissions, creating a potentially powerful climate change-reinforcing feedback loop. The challenges raised by climate change underscore the urgent need to transition to sustainable, climate-resilient agricultural systems. This requires investments that both accelerate adoption of proven solutions that provide multiple benefits, and that discover and scale new beneficial processes and food products.
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Affiliation(s)
- Yi Yang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China
- The National Centre for International Research of Low-carbon and Green Buildings (Ministry of Science and Technology), Chongqing University, Chongqing 400045, PR China
- The Joint International Research Laboratory of Green Buildings and Built Environments (Ministry of Education), Chongqing University, Chongqing 400045, PR China
| | - David Tilman
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, MN 55108, USA
- Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106, USA
| | - Zhenong Jin
- Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA
| | - Pete Smith
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 3UU, Scotland
| | - Christopher B Barrett
- CH Dyson School of Applied Economics and Management, JE Brooks School of Public Policy, and Cornell Atkinson Center for Sustainability, Cornell University, Ithaca, NY 14850, USA
| | - Yong-Guan Zhu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jennifer Burney
- School of Global Policy and Strategy, University of California, San Diego, La Jolla, CA 92093, USA
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla CA 92037 USA
| | - Paolo D'Odorico
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, USA
| | - Peter Fantke
- substitute ApS, Graaspurvevej 55, 2400 Copenhagen, Denmark
- Quantitative Sustainability Assessment, Department of Environmental and Resource Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Joe Fargione
- The Nature Conservancy, Minneapolis, MN 55415, USA
| | - Jacques C Finlay
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, MN 55108, USA
- St. Anthony Falls Laboratory, Dept. of Civil, Environmental, and Geo-Engineering, University of Minnesota, MN 55414, USA
| | | | - Lindsey Sloat
- World Resources Institute, Washington, DC 20002, USA
| | | | - Paul C West
- Department of Applied Economics, University of Minnesota, St. Paul, MN 55108, USA
- Project Drawdown, St. Paul, MN 55101, USA
| | - Lewis Ziska
- Environmental Health Science, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Anna M Michalak
- Department of Global Ecology, Carnegie Institution for Science, Stanford, California, CA 94305, USA
- Department of Earth System Science, and Department of Biology, Stanford University, Stanford, CA 94305, USA
- Google Research, Mountain View, CA 94043, USA
| | - David B Lobell
- Department of Earth System Science and Center on Food Security and the Environment, Stanford University, Stanford, CA 94305, USA
| | - Michael Clark
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China
| | - Jed Colquhoun
- The National Centre for International Research of Low-carbon and Green Buildings (Ministry of Science and Technology), Chongqing University, Chongqing 400045, PR China
| | - Teevrat Garg
- The Joint International Research Laboratory of Green Buildings and Built Environments (Ministry of Education), Chongqing University, Chongqing 400045, PR China
| | - Karen A Garrett
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, MN 55108, USA
| | - Camilla Geels
- Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106, USA
| | - Rebecca R Hernandez
- Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA
| | - Mario Herrero
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 3UU, Scotland
| | - William D Hutchison
- CH Dyson School of Applied Economics and Management, JE Brooks School of Public Policy, and Cornell Atkinson Center for Sustainability, Cornell University, Ithaca, NY 14850, USA
| | - Meha Jain
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Jacob M Jungers
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Beibei Liu
- School of Global Policy and Strategy, University of California, San Diego, La Jolla, CA 92093, USA
| | - Nathaniel D Mueller
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla CA 92037 USA
| | - Ariel Ortiz-Bobea
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, USA
| | - Jacob Schewe
- substitute ApS, Graaspurvevej 55, 2400 Copenhagen, Denmark
| | - Jie Song
- Quantitative Sustainability Assessment, Department of Environmental and Resource Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | | | - Peter Vitousek
- St. Anthony Falls Laboratory, Dept. of Civil, Environmental, and Geo-Engineering, University of Minnesota, MN 55414, USA
| | - Yoshihide Wada
- Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Longlong Xia
- World Resources Institute, Washington, DC 20002, USA
| | - Xin Zhang
- Department of Geography, University of Exeter, Exeter EX4 4RJ, UK
| | - Minghao Zhuang
- Department of Applied Economics, University of Minnesota, St. Paul, MN 55108, USA
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3
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Song CU, Purnaningtyas DW, Choi H, Jeon D, Kim S, Hwang H, Kim CG, Lee YH, Eyun SI. Do red tide events promote an increase in zooplankton biodiversity? ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024:124880. [PMID: 39236840 DOI: 10.1016/j.envpol.2024.124880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 08/30/2024] [Accepted: 09/01/2024] [Indexed: 09/07/2024]
Abstract
Red tides occurring off the southern coast of Korea impact the marine ecosystem and aquaculture industries. Zooplankton are crucial in the food web, connecting primary producers to higher predators and interact diversely with red tide organisms. This study explores dynamics of the zooplankton community over seven years including three red tide and four non-red tide years in Tongyeong using metabarcoding. In non-red tide years, zooplankton diversity showed typical seasonal patterns, increasing from June to early October. However, during red tide years, diversity remained high, with a shift in species composition-decreased Copepoda and increased Branchiopoda, Echinodermata, Malacostraca, and Annelida. Diversity indices were significantly higher in red tide years across all periods except for the richness in 'after' that showed an insignificant higher value. The differences in zooplankton assemblages across periods were influenced by surface temperatures and the density of the red tide-causing alga Margalefidinium polykrikoides. Eight species emerged as indicator species and showed direct correlations with M. polykrikoides and among them, seven species were indicator species for red tide occurrence years. The ecological characteristics of M. polykrikoides blooms and their recurrent occurrences over several decades suggest that zooplankton may adapt to the toxins and use these blooms as spawning cues. Overall, this study provides comprehensive understanding on changes in zooplankton communities during red tide events, offering novel insights into their ecology.
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Affiliation(s)
- Chi-Une Song
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
| | | | - Hyeongwoo Choi
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
| | - Donggu Jeon
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea
| | - Sung Kim
- Korea Institute of Ocean Science and Technology, Busan 49111, Korea
| | - Hyenjung Hwang
- Korea Institute of Ocean Science and Technology, Busan 49111, Korea
| | - Choong-Gon Kim
- Korea Institute of Ocean Science and Technology, Busan 49111, Korea
| | - Youn-Ho Lee
- KIOST School, University of Science and Technology, Busan, 49111, Korea.
| | - Seong-Il Eyun
- Department of Life Science, Chung-Ang University, Seoul 06974, Korea.
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4
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Meng R, Du X, Ge K, Wu C, Zhang Z, Liang X, Yang J, Zhang H. Does climate change increase the risk of marine toxins? Insights from changing seawater conditions. Arch Toxicol 2024; 98:2743-2762. [PMID: 38795135 DOI: 10.1007/s00204-024-03784-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 05/08/2024] [Indexed: 05/27/2024]
Abstract
Marine toxins produced by marine organisms threaten human health and impose a heavy public health burden on coastal countries. Lately, there has been an emergence of marine toxins in regions that were previously unaffected, and it is believed that climate change may be a significant factor. This paper systematically summarizes the impact of climate change on the risk of marine toxins in terms of changes in seawater conditions. From our findings, climate change can cause ocean warming, acidification, stratification, and sea-level rise. These climatic events can alter the surface temperature, salinity, pH, and nutrient conditions of seawater, which may promote the growth of various algae and bacteria, facilitating the production of marine toxins. On the other hand, climate change may expand the living ranges of marine organisms (such as algae, bacteria, and fish), thereby exacerbating the production and spread of marine toxins. In addition, the sources, distribution, and toxicity of ciguatoxin, tetrodotoxin, cyclic imines, and microcystin were described to improve public awareness of these emerging marine toxins. Looking ahead, developing interdisciplinary cooperation, strengthening monitoring of emerging marine toxins, and exploring more novel approaches are essential to better address the risks of marine toxins posed by climate change. Altogether, the interrelationships between climate, marine ecology, and marine toxins were analyzed in this study, providing a theoretical basis for preventing and managing future health risks from marine toxins.
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Affiliation(s)
- Ruiyang Meng
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Xingde Du
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Kangfeng Ge
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Chunrui Wu
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Zongxin Zhang
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Xiao Liang
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Jun Yang
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Huizhen Zhang
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China.
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5
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Díaz PA, Araya M, Cantarero B, Miranda C, Varela D, Figueroa RI, Basti L, Carbonell P, Aravena Á, Pérez-Santos I, Nieves MG, Álvarez G. Are yessotoxins an emerging problem in Chile? Context and perspectives following the first report of YTX levels exceeding the regulatory limit in the Patagonian fjord system. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 361:124844. [PMID: 39209054 DOI: 10.1016/j.envpol.2024.124844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2024] [Revised: 08/15/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
In late summer and early autumn 2022, an intense bloom of Protoceratium reticulatum-the main yessotoxin (YTX) producer along Chilean coasts and a major threat to artisanal fisheries, the aquaculture industry, and environmental health-was recorded in the Patagonian fjord system. The high YTX levels (>3.75 mg kg-1) resulted in the first ban of shellfish collection in Chile. At Puyuhuapi Fjord, a global "hotspot" of harmful algal bloom events, the cell density of P. reticulatum determined in integrated tube samples (0-10 m) at the end of April 2022 reached 407,000 cells L-1. At the same time, YTX levels well exceeded the regulatory limit by roughly 2.5-fold, with concentrations as high as 9.42 mg kg-1 measured in native populations of the blue mussel Mytilus chilensis. Five different YTX analogues, 45-OH-YTX, COOH-45-keto-YTX, COOH-45-OH-YTX, COOH-YTX, and 45,55-diOH-YTX, were also detected in relevant amounts. While the ban lasted close to 3 months, accumulation and detoxification processes were monitored over a 1-year period. This study assessed the implications of high levels of YTXs and their analogues on the local economy and ecosystem health, given the increase in P. reticulatum blooms predicted for NW Patagonia in the context of a changing climate.
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Affiliation(s)
- Patricio A Díaz
- Centro i∼mar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile; CeBiB, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile.
| | - Michael Araya
- Centro de Investigación y Desarrollo Tecnológico en Algas (CIDTA), Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile
| | - Bárbara Cantarero
- Centro i∼mar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
| | - Carolina Miranda
- Centro i∼mar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
| | - Daniel Varela
- Centro i∼mar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
| | - Rosa I Figueroa
- Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO-CSIC), Subida a Radio Faro 50, 36390, Vigo, Spain
| | - Leila Basti
- WorldFish Headquarters, Jalan Batu Maung, Batu Maung, 11960 Bayan Lepas, Penang, Malaysia; College of Agriculture and Veterinary Science, Department of Integrative Agriculture, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates; Faculty of Marine Resources and Environment, Tokyo University of Marine Science and Technology, 108-8477, Tokyo, Japan
| | - Pamela Carbonell
- Centro de Estudios de Algas Nocivas (CREAN), Instituto de Fomento Pesquero (IFOP), Padre Harter 574, Puerto Montt, Chile
| | - Álvaro Aravena
- Centro i∼mar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
| | - Iván Pérez-Santos
- Centro i∼mar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile; Center for Oceanographic Research COPAS COASTAL, Universidad de Concepción, Chile; Centro de Investigaciones en Ecosistemas de la Patagonia (CIEP), Coyhaique, Chile
| | - María Gabriela Nieves
- Programa de Doctorado en Acuicultura, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Gonzalo Álvarez
- Centro de Investigación y Desarrollo Tecnológico en Algas (CIDTA), Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile; Facultad de Ciencias del Mar, Departamento de Acuicultura, Universidad Católica del Norte, Coquimbo, Chile; Center for Ecology and Sustainable Management of Oceanic Islands (ESMOI), Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile; Centro de Innovación Acuícola AQUAPACIFICO, Larrondo 1281, Coquimbo, Chile
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Terauchi M, Komazaki Y, Yoshino A, Cho Y, Kudo Y, Yotsu-Yamashita M, Konoki K. Assay for okadaic acid O-acyl transferase using HPLC-FLD. Biosci Biotechnol Biochem 2024; 88:999-1006. [PMID: 38886126 DOI: 10.1093/bbb/zbae085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Accepted: 06/12/2024] [Indexed: 06/20/2024]
Abstract
Dinophysistoxin 1 (DTX1, 1) and okadaic acid (OA, 2), produced by the dinoflagellates Dinophysis spp. and Prorocentrum spp., are primary diarrhetic shellfish toxins (DSTs), which may cause gastric illness in people consuming such as bivalves. Both compounds convert to dinophysistoxin 3 (DTX3, 3; generic name for 1 and 2 with fatty acids conjugated at 7-OH) in bivalves. The enzyme okadaic acid O-acyl transferase (OOAT) is a membrane protein found in the microsomes of the digestive glands of bivalves. In this study, we established an in vitro enzymatic conversion reaction using 4-nitro-2,1,3-benzoxadiazole (NBD)-OA (4), an OA derivative conjugated with (R)-(-)-4-nitro-7-(3-aminopyrrolidin-1-yl)-2,1,3-benzoxadiazole (NBD-APy) on 1-CO2H, as a substrate. We detected the enzymatically produced 3, NBD-7-O-palmitoyl-OA (NBD-Pal-OA), using high-performance liquid chromatography-fluorescence detection. We believe that an OOAT assay using 4 will facilitate the fractionation and isolation of OOAT in the future.
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Affiliation(s)
- Masato Terauchi
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Yuki Komazaki
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | | | - Yuko Cho
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Yuta Kudo
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Mari Yotsu-Yamashita
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Keiichi Konoki
- Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
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Lai C, Dai X, Tian D, Lv S, Tang J. Chemistry and bioactivity of marine algal toxins and their geographic distribution in China. Fitoterapia 2024; 178:106193. [PMID: 39187028 DOI: 10.1016/j.fitote.2024.106193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 08/08/2024] [Accepted: 08/23/2024] [Indexed: 08/28/2024]
Abstract
Marine algal toxins are usually produced by some toxic algae during toxic algal blooms which can be accumulated in marine organisms through food chains, leading to contamination of aquatic products. Consumption of the contaminated seafood often results in poisoning in human being. Although algal toxins are harmful for human health, their unique structures and broad spectrum of biological activities have attracted widespread attention of chemists and pharmacologists. Marine algal toxins are not only a reservoir of biological active compound discovery, but also powerful tools for exploring life science. This review first provides a comprehensive overview of the chemistry and biological activities of marine algal toxins, with the aim of providing references for biological active compound discovery. Additionally, typical shellfish poisoning incidents occurred in China in the past 15 years and the geographical distribution of the marine algal toxins in China Sea are discussed, for the purpose of enhancing public awareness of the possible dangers of algal toxins.
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Affiliation(s)
- Changrong Lai
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/State Key Laboratory of Bioactive Molecules and Druggability Assessment/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou 510632, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, Liaoning, China
| | - Xiaojun Dai
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/State Key Laboratory of Bioactive Molecules and Druggability Assessment/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou 510632, China
| | - Danmei Tian
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/State Key Laboratory of Bioactive Molecules and Druggability Assessment/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou 510632, China
| | - Songhui Lv
- Research Center of Harmful Algae and Marine Biology, College of Life Science and Technology, Jinan University, Guangzhou 510362, China.
| | - Jinshan Tang
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/State Key Laboratory of Bioactive Molecules and Druggability Assessment/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou 510632, China.
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8
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Kim D, Lee K, Jeong S, Song M, Kim B, Park J, Heo TY. Real-time chlorophyll-a forecasting using machine learning framework with dimension reduction and hyperspectral data. ENVIRONMENTAL RESEARCH 2024; 262:119823. [PMID: 39173818 DOI: 10.1016/j.envres.2024.119823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 08/18/2024] [Accepted: 08/19/2024] [Indexed: 08/24/2024]
Abstract
Since water is an essential resource in various fields, it requires constant monitoring. Chlorophyll-a concentration is a crucial indicator of water quality and can be used to monitor water quality. In this study, we developed methods to forecast chlorophyll-a concentrations in real-time using hyperspectral data on IoT platform and various machine learning algorithms. Compared to regular cameras that record information only in the three broad color bands of red, green, and blue, the hyperspectral images of drinking water sources record the data in dozens or even hundreds of distinct small wavelength bands, providing each pixel in an image with a full spectrum. Different machine learning algorithms have been developed using hyperspectral data and field observations of water quality and weather conditions. Previous studies have predicted chlorophyll concentrations using either partial least squares (PLS), which is a dimensionality reduction method, or machine learning. In contrast, our study employed the PLS technique as a preprocessing step to diminish the dimensionality of the hyperspectral data, followed by the application of the machine learning techniques with optimized hyperparameters to improve the precision of the predictions, thereby introducing a real-time mechanism for chlorophyll-a prediction. Consequently, a machine learning algorithm with R2 values of 0.9 or above and sufficiently small RMSE was developed for real-time chlorophyll-a forecasting. Real-time chlorophyll-a forecasting using LightGBM has the best performance, with a mean R2 of 0.963 and a mean RMSE of 2.679. This paper is expected to have applications in algal bloom early detection on monitoring systems.
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Affiliation(s)
- Doyun Kim
- Department of Information and Statistics, Chungbuk National University, South Korea
| | - KyoungJin Lee
- Sales Department, Esolutions Co. Ltd, Daejeon, South Korea
| | - SeungMyeong Jeong
- Autonomous IoT Research Center, Korea Electronics Technology Institute, South Korea
| | - MinSeok Song
- EMS department, DongMoon ENT Co., Ltd., South Korea
| | | | - Jungsu Park
- Department of Civil and Environmental Engineering, Hanbat National University, South Korea.
| | - Tae-Young Heo
- Department of Information and Statistics, Chungbuk National University, South Korea.
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9
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Kim M, Kim SY, Lim YK, Baek SH, Hong S. Nationwide seasonal monitoring of lipophilic marine algal toxins in shellfish and causative microalgae along the coasts of South Korea. MARINE POLLUTION BULLETIN 2024; 207:116855. [PMID: 39151328 DOI: 10.1016/j.marpolbul.2024.116855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 06/10/2024] [Accepted: 08/12/2024] [Indexed: 08/19/2024]
Abstract
In this study, lipophilic marine algal toxins (LMATs)-producing microalgae were identified at 23 sites along the coasts of Korea, and distribution characteristics of LMATs in phytoplankton and mussels were investigated. The causative microalgae, including Gonyaulux spinifera, Dinophysis acuminata, D. caudata, and D. fortii, were observed in the study area, with notably higher densities during the summer. Significant correlations were found between the densities of these microalgae and the water temperature. Seasonal distribution patterns of LMATs in phytoplankton closely matched those observed in mussels. Notably, LMAT concentrations in mussels from the Yellow Sea were relatively high. PTX2 was detected predominantly in phytoplankton, and homo-yessotoxin was found mainly in mussels. Overall, LMAT concentrations were elevated in the summer, raising concerns about biotoxin contamination in shellfish. These results provide important insights into the dynamics of unmanaged marine biotoxins in Korea and offer baseline data for future safety management policies and inflow surveillance.
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Affiliation(s)
- Mungi Kim
- Department of Earth, Environmental & Space Sciences, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Sea-Yong Kim
- Department of Marine Environmental Sciences & Institute of Marine Environmental Sciences, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Young Kyun Lim
- Ecological Risk Research Department, Korea Institute of Ocean Science and Technology, Geoje 53201, Republic of Korea
| | - Seung Ho Baek
- Ecological Risk Research Department, Korea Institute of Ocean Science and Technology, Geoje 53201, Republic of Korea.
| | - Seongjin Hong
- Department of Earth, Environmental & Space Sciences, Chungnam National University, Daejeon 34134, Republic of Korea; Department of Marine Environmental Sciences & Institute of Marine Environmental Sciences, Chungnam National University, Daejeon 34134, Republic of Korea.
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10
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Rahnama A, Vaithiyanathan M, Briceno-Mena L, Dugas TM, Yates KL, Romagnoli JA, Melvin AT. A microfluidic approach to study variations in Chlamydomonas reinhardtii alkaline phosphatase activity in response to phosphate availability. Analyst 2024; 149:4256-4266. [PMID: 38895826 DOI: 10.1039/d4an00619d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Algal growth depends strongly on phosphorus (P) as a key nutrient, underscoring the significance of monitoring P levels. Algal species display a sensitive response to fluctuations in P availability, notably through the expression of alkaline phosphatase (AP) when challenged with P-depletion. As such, alkaline phosphatase activity (APA) serves as a valuable metric for P availability, offering insights into how algae utilize and fix available P resources. However, current APA quantification methods lack single cell resolution, while also being time- and reagent consuming. Microfluidics offers a promising cost-effective solution to these limitations, providing a platform for precise single-cell analysis. In this study, a trap-based microfluidic device was integrated with a commercially available AP live stain to study the single cell APA response of a model algae strain, Chlamydomonas reinhardtii, when exposed to different exogenous P levels. A three-step culture-starve-spike process was used to induce APA in cells cultured under two different basal P levels (1 and 21 mM). When challenged with different spiked P levels (ranging from 0.1-41 mM), C. reinhardtii cells demonstrated a highly heterogeneous APA response. Two-way ANOVA confirmed that this response is influenced by both spiked and basal P levels. Utilizing an unsupervised machine learning approach (HDBSCAN), distinct subpopulations of C. reinhardtii cells were identified exhibiting varying levels of APA at the single-cell level. These subpopulations encompass significant groups of individual cells with either notably high or low APA, contributing to the overall behavior of the cohorts. Considerable intrapopulation differences in APA were observed across cohorts with similar average behavior. For instance, while some cohorts exhibited a concentrated distribution around the overall average APA, others displayed subpopulations dispersed across a wider range of APA levels. This underscores the potential bias introduced by analyzing a small number of cells in bulk, which may skew results by overrepresenting extreme behavioral subpopulations. The findings if this study highlight the need for analytical approaches that account for single cell heterogeneity in APA and demonstrate the utility of microfluidics as a well-suited means for such investigations. This study illuminates the complexities of APA regulation at the single cell level, providing crucial insights that advance our understanding of algal phosphorus metabolism and environmental responses.
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Affiliation(s)
- Alireza Rahnama
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana, 70803, USA.
| | - Manibarathi Vaithiyanathan
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana, 70803, USA.
| | - Luis Briceno-Mena
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana, 70803, USA.
| | - Travis M Dugas
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana, 70803, USA.
| | - Kelly L Yates
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana, 70803, USA.
| | - Jose A Romagnoli
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana, 70803, USA.
| | - Adam T Melvin
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana, 70803, USA.
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina, 29634, USA
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11
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Zhang S, Fu Z, Dong X, Zheng X, Gu H. Diversity and seasonal occurrence of haptophyta in northern South China Sea through size-fractionated metabarcoding. MARINE POLLUTION BULLETIN 2024; 205:116609. [PMID: 38905736 DOI: 10.1016/j.marpolbul.2024.116609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 06/14/2024] [Accepted: 06/15/2024] [Indexed: 06/23/2024]
Abstract
Haptophyta plays a key role in marine pico-nanoeukaryote communities but information on their diversity and ecology is extremely limited. A total of 103 water samples were collected in northern South China Sea to assess the diversity of haptophyta through metabarcoding targeting 18S V4 rDNA. Furthermore, we investigated the potential genetic differentiation among seasonal occurring Phaeocystis globosa using the high resolution molecular marker pgcp1. 18S V4 rDNA metabarcoding dataset revealed 41 species of haptophytes, with 16 of them as the first record in this region. Notably, six harmful species were detected, including Chrysochromulina leadbeateri, Phaeocystis globosa, and Prymnesium parvum. The pgcp1 marker revealed two clades of Phaeocystis globosa and both of them were present around the year. Clade I was found to predominate in warm season, while Clade III tended to bloom in cold waters. Our results highlight the risk potential of harmful haptophytes in the northern South China Sea.
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Affiliation(s)
- Shiya Zhang
- School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China; Department of Marine Ecology Conservation, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Zhengxu Fu
- Department of Marine Ecology Conservation, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Xu Dong
- Department of Marine Ecology Conservation, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Xinqing Zheng
- Department of Marine Ecology Conservation, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Haifeng Gu
- School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China; Department of Marine Ecology Conservation, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China; Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf, Ministry of Natural Resources, Beihai 536015, China.
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12
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Lin YC, Nien YH, Chiang KP, Chin CP, Chen WT, Gong GC, Chou WC, Shih CY, Chen KS. The impact of flooding from the Minjiang River on the succession of harmful algal blooms (HABs) caused by diatoms in China's offshore waters. MARINE POLLUTION BULLETIN 2024; 205:116650. [PMID: 38981195 DOI: 10.1016/j.marpolbul.2024.116650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 06/20/2024] [Accepted: 06/21/2024] [Indexed: 07/11/2024]
Abstract
This study examines diatom assemblages in the Matsu Archipelago, an area influenced by Minjiang River runoff. It focuses on harmful algal blooms (HABs) that occurred between August 2021 and July 2022. Utilizing 18S rRNA metabarcoding and microscopic analysis, we observed a significant diatom bloom during early summer runoff, peaking at 5 × 105 cells L-1. The research reveals dynamic community changes during the runoff season, with dominant genera including Pseudo-nitzschia, Chaetoceros, and Skeletonema. Skeletonema cell density correlated with NO3 levels, Chaetoceros had a slight PO4 affinity, and Pseudo-nitzschia showed a negative correlation with Skeletonema. Pseudo-nitzschia, which prefers high light and pH conditions, had notably high concentrations in the flood season and in the autumn. In both, it was dominated by potential toxin-producing species - P. multistriata and P. pungens during the flooding, and P. cuspidate in the autumn. These findings highlight the intricate relationship between diatom dynamics and environmental factors, providing essential insights for managing HABs, especially Pseudo-nitzschia species, amidst environmental changes.
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Affiliation(s)
- Yun-Chi Lin
- General Education Center, National Taiwan Ocean University, Keelung, Taiwan; Taiwan Ocean Genome Center, National Taiwan Ocean University, Keelung, Taiwan; Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, Taiwan.
| | - Ya-Han Nien
- Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, Taiwan
| | - Kuo-Ping Chiang
- Taiwan Ocean Genome Center, National Taiwan Ocean University, Keelung, Taiwan; Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan.
| | | | - Wei-Ting Chen
- Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, Taiwan
| | - Gwo-Ching Gong
- Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
| | - Wen-Chen Chou
- Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
| | - Chi-Yu Shih
- Taiwan Ocean Genome Center, National Taiwan Ocean University, Keelung, Taiwan; Bachelor Degree Program in Marine Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Kuo-Shu Chen
- Marine Ecology and Conservation Research Center, National Academy of Marine Research, Kaohsiung, Taiwan; Marine Ecology and Conservation Research Center, National Academy of Marine Research, Ocean Affairs Council, Kaohsiung, Taiwan
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13
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Guo H, Wang X, Li C, Mohamed HF, Li D, Wang L, Chen H, Lin K, Huang S, Pang J, Zhang Y, Krock B, Luo Z. Ignited competition: Impact of bioactive extracellular compounds on organelle functions and photosynthetic systems in harmful algal blooms. PLANT, CELL & ENVIRONMENT 2024. [PMID: 39047015 DOI: 10.1111/pce.15057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 06/14/2024] [Accepted: 07/15/2024] [Indexed: 07/27/2024]
Abstract
Prevalent interactions among marine phytoplankton triggered by long-range climatic stressors are well-known environmental disturbers of community structure. Dynamic response of phytoplankton physiology is likely to come from interspecies interactions rather than direct climatic effect on single species. However, studies on enigmatic interactions among interspecies, which are induced by bioactive extracellular compounds (BECs), especially between related harmful algae sharing similar shellfish toxins, are scarce. Here, we investigated how BECs provoke the interactions between two notorious algae, Alexandrium minutum and Gymnodinium catenatum, which have similar paralytic shellfish toxin (PST) profiles. Using techniques including electron microscopy and transcriptome analysis, marked disruptions in G. catenatum intracellular microenvironment were observed under BECs pressure, encompassing thylakoid membrane deformations, pyrenoid matrix shrinkage and starch sheaths disappearance. In addition, the upregulation of gene clusters responsible for photosystem-I Lhca1/4 and Rubisco were determined, leading to weaken photon captures and CO2 assimilation. The redistribution of lipids and proteins occurred at the subcellular level based on in situ focal plane array FTIR imaging approved the damages. Our findings illuminated an intense but underestimated interspecies interaction triggered by BECs, which is responsible for dysregulating photosynthesis and organelle function in inferior algae and may potentially account for fitness alteration in phytoplankton community.
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Affiliation(s)
- Huige Guo
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Xiaochen Wang
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Changlin Li
- Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, China
| | - Hala F Mohamed
- Department of Botany & Microbiology, (Girls Branch), Faculty of Science, Al-Azhar University, Cairo, Egypt
| | - Dawei Li
- College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Lianghui Wang
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Hongzhe Chen
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Kunning Lin
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Shuyuan Huang
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Jinling Pang
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Yuanbiao Zhang
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Bernd Krock
- Helmholtz Center for Polar and Marine Research, Alfred Wegener Institute, Bremerhaven, Germany
| | - Zhaohe Luo
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
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14
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Li J, Chang X, Zhao S, Zhang Y, Pu Q, Wang Y, Li J. Exudates of Microcystis aeruginosa on oxidative stress and inflammatory responses in gills of Sinocyclocheilus grahami. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 280:116587. [PMID: 38878336 DOI: 10.1016/j.ecoenv.2024.116587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/07/2024] [Accepted: 06/10/2024] [Indexed: 06/25/2024]
Abstract
Early cyanobacterial blooms studies observed that exposure to blue-green algae led to fish gills impairment. The objective of this work was to evaluate the toxic mechanisms of exudates of Microcystis aeruginosa (MaE) on fish gills. In this study, the toxic mechanism of MaE (2×106 cells/mL) and one of its main components phytosphingosine (PHS) with two concentrations 2.9 ng/mL and 145 ng/mL were conducted by integrating histopathology, biochemical biomarkers, and transcriptomics techniques in Sinocyclocheilus grahami (S. grahami) for 96 h exposure. Damaged gill tissue with epithelial hyperplasia and hypertrophy, remarkable Na+/K+-ATPase (NKA) enzyme activity, disrupted the redox homeostats including lipid peroxidation and inflammatory responses were observed in the fish of MaE exposure group. Compare to MaE exposure, two concentrations of PHS exposure appeared to be a trend of lower degree of tissue damage, NKA activity and oxidative stress, but induced obviously lipid metabolism disorder with higher triglycerides, total cholesterol and total bile acid, which might be responsible for inflammation responses in fish gill. By transcriptome analysis, MaE exposure were primarily enriched in pathways related to gill function and immune response. PHS exposure, with higher number of differentially expressed genes (DEGs), were enriched in Toll-like receptor (TLR), Mitogen-Activated Protein Kinase (MAPK) and NOD-like receptor protein 3 (NLRP3) pathways. We concluded that MaE and PHS were induced the inflammatory responses, with oxidative stress-induced inflammation for MaE exposure but lipid metabolism disorder-induced inflammation for PHS exposure. The present study provided two toxin-induced gill inflammation response pathways under cyanobacterial blooms, which could be a scientific basis for the ecological and health risk assessment in the aquatic environment.
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Affiliation(s)
- Jun Li
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming, Yunnan 650500, China; Institute of International Rivers and Eco-security, Kunming, Yunnan 650500, China
| | - Xuexiu Chang
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, College of Agronomy and Life Sciences, Kunming University, Kunming 650214, China
| | - Sen Zhao
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming, Yunnan 650500, China
| | - Yuanwei Zhang
- Yunnan Key Laboratory of Plateau Fish Breeding, Yunnan Engineering Research Center for Plateau-Lake Health and Restoration, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Qi Pu
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming, Yunnan 650500, China
| | - Yuting Wang
- Institute of International Rivers and Eco-security, Kunming, Yunnan 650500, China
| | - Jiaojiao Li
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming, Yunnan 650500, China.
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15
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Shang J, Zhao M, Yan S. Comprehensive analysis of cyanobacterial secondary metabolites distribution and toxicity in urban water bodies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 932:173023. [PMID: 38719060 DOI: 10.1016/j.scitotenv.2024.173023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/23/2024] [Accepted: 05/04/2024] [Indexed: 05/12/2024]
Abstract
This study addresses the increasing concern regarding cyanotoxin contamination of water bodies, highlighting the diversity of these toxins and their potential health implications. Cyanobacteria, which are prevalent in aquatic environments, produce toxic metabolites, raising concerns regarding human exposure and associated health risks, including a potential increase in cancer risk. Although existing research has primarily focused on well-known cyanotoxins, recent technological advancements have revealed numerous unknown cyanotoxins, necessitating a comprehensive assessment of multiple toxin categories. To enhance the cyanotoxin databases, we optimized the CyanoMetDB cyanobacterial secondary metabolites database by incorporating secondary fragmentation patterns using the Mass Frontier fragmentation data prediction software. Water samples from diverse locations in Shanghai were analyzed using high-resolution mass spectrometry. Subsequently, the toxicity of cyanobacterial metabolites in the water samples was examined through acute toxicity assays using the crustacean Thamnocephalus platyurus. After 24 h of exposure, the semi-lethal concentrations (LC50) of the water samples ranged from 0.31 mg L-1 to 1.78 mg L-1 (MC-LR equivalent concentration). Our findings revealed a critical correlation between the overall concentration of cyanobacterial metabolites and toxicity. The robust framework and insights of this study underscore the need for an inclusive approach to water quality management, emphasizing continuous efforts to refine detection methods and comprehend the broader ecological impact of cyanobacterial blooms on aquatic ecosystems.
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Affiliation(s)
- Jiong Shang
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200438, PR China
| | - Mengzhe Zhao
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200438, PR China
| | - Shuwen Yan
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200438, PR China.
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16
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Hii KS, Abdul Manaff AHN, Gu H, Lim PT, Leaw CP. A comparative analysis of real-time quantitative PCR and metabarcoding methods for eDNA-based detection of the toxic dinophyte Alexandrium tamiyavanichii (Dinophyceae). MARINE ENVIRONMENTAL RESEARCH 2024; 199:106593. [PMID: 38852495 DOI: 10.1016/j.marenvres.2024.106593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/18/2024] [Accepted: 06/04/2024] [Indexed: 06/11/2024]
Abstract
The marine dinophyte Alexandrium tamiyavanichii is a toxigenic species that produces a group of neurotoxins that is responsible for paralytic shellfish poisoning in humans. Early detection of the species is essential for efficient monitoring. Harmful microalgal monitoring systems have evolved over the years with the advent of environmental DNA (eDNA)-based species detection techniques. In this study, eDNA samples were collected from a large-scale sampling covering the southern South China Sea. The sensitivity and specificity of metabarcoding of the V4 and V9 18S ribosomal DNA barcodes by high-throughput sequencing (HTS) were compared to the species-specific real-time qPCR targeting the A. tamiyavanichii ITS2 region. Environmental samples were screened for A. tamiyavanichii by qPCR (n = 43) and analyzed with metabarcoding (n = 30). Our results revealed a high occupancy profile across samples for both methods; 88% by qPCR, and 80-83% by HTS. When comparing the consistency between the two approaches, only two samples out of 30 were discordant. The V4 and V9 molecular units detected in each sample were positively correlated with the qPCR ITS2 gene copies (V4, rs = 0.67, p < 0.0001; V9, rs = 0.65, p < 0.0001), indicating that metabarcoding could be used as a useful tool for early detection of the species. Our results also revealed that the estimation of A. tamiyavanichii cell abundances based on the HTS read abundances was comparable to that of the qPCR quantification. For long-term monitoring, metabarcoding could serve as a cost-effective screening of detecting not only single HAB species but also simultaneously detecting a multitude of potentially harmful species, which is valuable in informing the subsequent implementation of species-specific monitoring strategies.
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Affiliation(s)
- Kieng Soon Hii
- Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya, 16310, Bachok, Kelantan, Malaysia
| | | | - Haifeng Gu
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, 361005, China
| | - Po Teen Lim
- Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya, 16310, Bachok, Kelantan, Malaysia.
| | - Chui Pin Leaw
- Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya, 16310, Bachok, Kelantan, Malaysia.
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17
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Yan Z, Alamdari N. Integrating temporal decomposition and data-driven approaches for predicting coastal harmful algal blooms. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 364:121463. [PMID: 38878579 DOI: 10.1016/j.jenvman.2024.121463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/23/2024] [Accepted: 06/09/2024] [Indexed: 06/24/2024]
Abstract
Frequent coastal harmful algal blooms (HABs) threaten the ecological environment and human health. Biscayne Bay in southeastern Florida also faces algal bloom issues; however, the mechanisms driving these blooms are not fully understood, emphasizing the importance of HAB prediction for effective environmental management. The overarching goal of this study is to offer a robust HAB predictive framework and try to enhance the understanding of HAB dynamics. This study established three scenarios to predict chlorophyll-a concentrations, a recognized representative of HABs: Scenario 1 (S1) using single nonlinear machine learning (ML) algorithms, hybrid Scenario 2 (S2) combining linear models and nonlinear ML algorithms, and hybrid Scenario 3 (S3) combining temporal decomposition and ML (TD-ML) algorithms. The novel-developed S3 TD-ML hybrid models demonstrated superior predictive capabilities, achieving all R2 values above 0.9 and MAPE under 30% in tests, significantly outperforming the S1 with an average R2 of 0.16 and the S2 with an R2 of -0.06. S3 models effectively captured the algal dynamics, successfully predicting complex time series with extremes and noise. In addition, we unveiled the relationship between environmental variables and chlorophyll-a through correlation analysis and found that climate change might intensify the HABs in Biscayne Bay. This research developed a precise predictive framework for early warning and proactive management of HABs, offering potential global applicability and improved prediction accuracy to address HAB challenges.
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Affiliation(s)
- Zhengxiao Yan
- Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, 32310, USA
| | - Nasrin Alamdari
- Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, 32310, USA.
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18
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Cunha M, Nardi A, Botelho MJ, Sales S, Pereira E, Soares AMVM, Regoli F, Freitas R. Can exposure to Gymnodinium catenatum toxic blooms influence the impacts induced by Neodymium in Mytilus galloprovincialis mussels? What doesn't kill can make them stronger? JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134220. [PMID: 38636232 DOI: 10.1016/j.jhazmat.2024.134220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 03/28/2024] [Accepted: 04/03/2024] [Indexed: 04/20/2024]
Abstract
The presence in marine shellfish of toxins and pollutants like rare earth elements (REEs) poses a major threat to human well-being, coastal ecosystems, and marine life. Among the REEs, neodymium (Nd) stands out as a widely utilized element and is projected to be among the top five critical elements by 2025. Gymnodinum catenatum is a phytoplankton species commonly associated with the contamination of bivalves with paralytic shellfish toxins. This study evaluated the biological effects of Nd on the mussel species Mytilus galloprovincialis when exposed to G. catenatum cells for fourteen days, followed by a recovery period in uncontaminated seawater for another fourteen days. After co-exposure, mussels showed similar toxin accumulation in the Nd and G. catenatum treatment in comparison with the G. catenatum treatment alone. Increased metabolism and enzymatic defenses were observed in organisms exposed to G. catenatum cells, while Nd inhibited enzyme activity and caused cellular damage. Overall, this study revealed that the combined presence of G. catenatum cells and Nd, produced positive synergistic effects on M. galloprovincialis biochemical responses compared to G. catenatum alone, indicating that organisms' performance may be significantly modulated by the presence of multiple co-occurring stressors, such those related to chemical pollution and harmful algal blooms. ENVIRONMENTAL IMPLICATIONS: Neodymium (Nd) is widely used in green technologies like wind turbines, and this element's potential threats to aquatic environments are almost unknown, especially when co-occurring with other environmental factors such as blooms of toxic algae. This study revealed the cellular impacts induced by Nd in the bioindicator species Mytilus galloprovincialis but further demonstrated that the combination of both stressors can generate a positive defense response in mussels. The present findings also demonstrated that the impacts caused by Nd lasted even after a recovery period while a previous exposure to the toxins generated a faster biochemical improvement by the mussels.
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Affiliation(s)
- Marta Cunha
- Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Alessandro Nardi
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Ancona, Italy; NBFC, National Biodiversity Future Center, Palermo 90131, Italy
| | - Maria João Botelho
- IPMA, Portuguese Institute for the Sea and Atmosphere, Av. Alfredo Magalhães Ramalho 6, 1495-165 Algés, Portugal; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
| | - Sabrina Sales
- IPMA, Portuguese Institute for the Sea and Atmosphere, Av. Alfredo Magalhães Ramalho 6, 1495-165 Algés, Portugal
| | - Eduarda Pereira
- Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal; LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Amadeu M V M Soares
- Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193, Aveiro, Portugal
| | - Francesco Regoli
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Ancona, Italy; NBFC, National Biodiversity Future Center, Palermo 90131, Italy
| | - Rosa Freitas
- Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193, Aveiro, Portugal.
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Liu Z, Zhang Y, Jia X, Hoskins TD, Lu L, Han Y, Zhang X, Lin H, Shen L, Feng Y, Zheng Y, Hu C, Zhang H. Microcystin-LR Induces Estrogenic Effects at Environmentally Relevant Concentration in Black-Spotted Pond Frogs ( Pelophylax nigromaculatus): In Situ, In Vivo, In Vitro, and In Silico Investigations. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:9559-9569. [PMID: 38710655 DOI: 10.1021/acs.est.4c01322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Harmful cyanobacterial blooms are frequent and intense worldwide, creating hazards for aquatic biodiversity. The potential estrogen-like effect of Microcystin-LR (MC-LR) is a growing concern. In this study, we assessed the estrogenic potency of MC-LR in black-spotted frogs through combined field and laboratory approaches. In 13 bloom areas of Zhejiang province, China, the MC-LR concentrations in water ranged from 0.87 to 8.77 μg/L and were correlated with sex hormone profiles in frogs, suggesting possible estrogenic activity of MC-LR. Tadpoles exposed to 1 μg/L, an environmentally relevant concentration, displayed a female-biased sex ratio relative to controls. Transcriptomic results revealed that MC-LR induces numerous and complex effects on gene expression across multiple endocrine axes. In addition, exposure of male adults significantly increased the estradiol (E2)/testosterone (T) ratio by 3.5-fold relative to controls. Downregulation of genes related to male reproductive endocrine function was also identified. We also showed how MC-LR enhances the expression of specific estrogen receptor (ER) proteins, which induce estrogenic effects by activating the ER pathway and hypothalamic-pituitary-gonadal (HPG) axis. In aggregate, our results reveal multiple lines of evidence demonstrating that, for amphibians, MC-LR is an estrogenic endocrine disruptor at environmentally relevant concentrations. The data presented here support the need for a shift in the MC-LR risk assessment. While hepatoxicity has historically been the focus of MC-LR risk assessments, our data clearly demonstrate that estrogenicity is a major mode of toxicity at environmental levels and that estrogenic effects should be considered for risk assessments on MC-LR going forward.
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Affiliation(s)
- Zhiquan Liu
- School of Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Yinan Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Xiuying Jia
- Hangzhou City University, Hangzhou, Zhejiang 310015, China
| | - Tyler D Hoskins
- Department of Forestry & Natural Resources, Purdue University, West Lafayette, Indiana 47907, United States
| | - Liping Lu
- School of Public Health, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Yu Han
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Xiaofang Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Huikang Lin
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Lilai Shen
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Yixuan Feng
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Yueyue Zheng
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Chao Hu
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
| | - Hangjun Zhang
- School of Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
- Hangzhou International Urbanology Research Center, Hangzhou 311121, China
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China
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20
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Weng Q, Zhang R, Wu P, Chen J, Pan X, Zheng C, Zhao D, Wang J, Zhang H, Qi X, Han J, Lu Z, Zhou B. Occurrence and Exposure Assessment of Lipophilic Shellfish Toxins in the Zhejiang Province, China. Mar Drugs 2024; 22:239. [PMID: 38921550 PMCID: PMC11205204 DOI: 10.3390/md22060239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/27/2024] Open
Abstract
Although lipophilic shellfish toxins (LSTs) pose a significant threat to the health of seafood consumers, their systematic investigation and risk assessment remain scarce. The goals of this study were as follows: (1) analyze LST levels in commercially available shellfish in Zhejiang province, China, and determine factors influencing LST distribution; (2) assess the acute dietary risk of exposure to LSTs for local consumers during the red tide period; (3) explore potential health risks of LSTs in humans; and (4) study the acute risks of simultaneous dietary exposure to LSTs and paralytic shellfish toxins (PSTs). A total of 546 shellfish samples were collected. LSTs were detected in 89 samples (16.3%) at concentrations below the regulatory limits. Mussels were the main shellfish species contaminated with LSTs. Spatial variations were observed in the yessotoxin group. Acute exposure to LSTs based on multiple scenarios was low. The minimum tolerable exposure durations for LSTs calculated using the mean and the 95th percentile of consumption data were 19.7 and 4.9 years, respectively. Our findings showed that Zhejiang province residents are at a low risk of combined exposure to LSTs and PSTs; however, the risk may be higher for children under 6 years of age in the extreme scenario.
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Affiliation(s)
- Qin Weng
- School of Public Health, Hangzhou Medical College, Hangzhou 310013, China; (Q.W.); (Z.L.)
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Ronghua Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Pinggu Wu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Jiang Chen
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Xiaodong Pan
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Chenyang Zheng
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Dong Zhao
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Jikai Wang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Hexiang Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Xiaojuan Qi
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Junde Han
- Department of Epidemiology and Health Statistics, School of Public Health, Faculty of Medicine, Hangzhou Normal University, Hangzhou 311121, China;
| | - Zijie Lu
- School of Public Health, Hangzhou Medical College, Hangzhou 310013, China; (Q.W.); (Z.L.)
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
| | - Biao Zhou
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (C.Z.); (D.Z.); (J.W.); (H.Z.); (X.Q.)
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21
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Yang Z, Zhu J, Sun S, Deng L, Zhao J, Xu Z. A straightforward approach for the rapid detection of red Noctiluca scintillans blooms from satellite imagery. MARINE POLLUTION BULLETIN 2024; 202:116377. [PMID: 38669852 DOI: 10.1016/j.marpolbul.2024.116377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 04/10/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024]
Abstract
Red Noctiluca scintillans (RNS), a prominent species of dinoflagellate known for its conspicuous size and ability to form blooms, exhibits heterotrophic behavior and functions as a microzooplankton grazer within the marine food web. In this study, a straightforward technique referred to as the blue-green index (BGI) has been introduced for the purpose of distinguishing and discerning RNS from neighboring waters, owing to its pronounced absorption in the blue-green spectral range. This method has been applied across a range of satellite imagery, encompassing both multi-spectral and hyperspectral sensors. The study delved into three instances of bloom occurrences caused by RNS: firstly, in November 2014 and April 2022 off the western coast of Guangdong, and secondly, in February 2021 within the Beibu Gulf. The notable bloom event in the Beibu Gulf during February 2021 extended across an expansive area totaling 6933.5 km2. The motion speed and direction of the RNS bloom patches were also derived from successive satellite images. The recently introduced BGI method demonstrates insensitivity to suspended sediment, though its successful application necessitates accurate atmospheric correction. Subsequent efforts will involve the quantification of RNS blooms in a more precise manner, utilizing hyperspectral satellite data grounded in optimized band configurations.
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Affiliation(s)
- Zhihao Yang
- School of Marine Sciences, Sun Yat-sen University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, Guangdong, China; Guangzhou Pearl River Water Resources Protection and Science & Technology Development Co., Ltd, Guangzhou 510620, Guangdong, China
| | - Jianhang Zhu
- School of Marine Sciences, Sun Yat-sen University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, Guangdong, China
| | - Shaojie Sun
- School of Marine Sciences, Sun Yat-sen University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, Guangdong, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, Guangdong, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai 519082, Guangdong, China; Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519082, Guangdong, China; Key Laboratory of Natural Resources Monitoring in Tropical and Subtropical area of South China, Ministry of Natural Resources, Guangzhou 510500, Guangdong, China
| | - Lin Deng
- School of Marine Sciences, Sun Yat-sen University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, Guangdong, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, Guangdong, China.
| | - Jun Zhao
- School of Marine Sciences, Sun Yat-sen University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, Guangdong, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, Guangdong, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai 519082, Guangdong, China; Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519082, Guangdong, China; Key Laboratory of Natural Resources Monitoring in Tropical and Subtropical area of South China, Ministry of Natural Resources, Guangzhou 510500, Guangdong, China
| | - Zhantang Xu
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, Guangdong, China
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22
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Pan X, Liu H, Feng L, Zong Y, Cao Z, Guo L, Yang G. Full-length transcriptome analysis of a bloom-forming dinoflagellate Prorocentrum shikokuense (Dinophyceae). Sci Data 2024; 11:430. [PMID: 38664437 PMCID: PMC11045741 DOI: 10.1038/s41597-024-03269-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
Prorocentrum shikokuense (formerly P. donghaiense) is a pivotal dinoflagellate species associating with the HABs in the East China Sea. The complexity of its large nuclear genome hindered us from understanding its genomic characteristics. Full-length transcriptome sequencing offers a practical solution to decipher the physiological mechanisms of a species without the reference genome. In this study, we employed single-molecule real-time (SMRT) sequencing technology to sequence the full-length transcriptome of Prorocentrum shikokuense. We successfully generated 41.73 Gb of clean SMRT sequencing reads and isolated 105,249 non-redundant full-length non-chimeric reads. Our trial has led to the identification of 11,917 long non-coding RNA transcripts, 514 alternative splicing events, 437 putative transcription factor genes from 17 TF gene families, and 34,723 simple sequence repeats. Additionally, a total of 78,265 open reading frames were identified, of them 15,501 were the protein coding sequences. This dataset is valuable for annotating P. shikokuense genome, and will contribute significantly to the in-depth studies on the molecular mechanisms underlining the dinoflagellate bloom formation.
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Affiliation(s)
- Xiaohui Pan
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Hang Liu
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Leili Feng
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Yanan Zong
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Zihao Cao
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China
| | - Li Guo
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China.
| | - Guanpin Yang
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China.
- Key Laboratory of Evolution and Marine Biodiversity of Ministry of Education, Ocean University of China (OUC), Qingdao, 266003, P. R. China.
- Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, 266003, P. R. China.
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23
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Duarte Silva A, Rodrigues SM, Godinho L. Advances in the Early Warning of Shellfish Toxification by Dinophysis acuminata. Toxins (Basel) 2024; 16:204. [PMID: 38787056 PMCID: PMC11126001 DOI: 10.3390/toxins16050204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/09/2024] [Accepted: 04/17/2024] [Indexed: 05/25/2024] Open
Abstract
In Western Europe, the incidence of DST is likely the highest globally, posing a significant threat with prolonged bans on shellfish harvesting, mainly caused by species of the dinoflagellate genus Dinophysis. Using a time series from 2014 to 2020, our study aimed (i) to determine the concentration of D. acuminata in water at which shellfish toxin levels could surpass the regulatory limit (160 µg OA equiv kg-1) and (ii) to assess the predictability of toxic events for timely mitigation actions, especially concerning potential harvesting bans. The analysis considered factors such as (i) overdispersion in the data, (ii) distinct periods of presence and absence, (iii) the persistence of cells, and (iv) the temporal lag between cells in the water and toxins in shellfish. Four generalized additive models were tested, with the Tweedie (TW-GAM) model showing superior performance (>85%) and lower complexity. The results suggest existing thresholds currently employed (200 and 500 cells L-1) are well-suited for the Portuguese coast, supported by empirical evidence (54-79% accuracy). The developed algorithm allows for thresholds to be tailored on a case-by-case basis, offering flexibility for regional variations.
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Affiliation(s)
- Alexandra Duarte Silva
- IPMA—Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, 1495-165 Lisboa, Portugal;
| | - Susana Margarida Rodrigues
- IPMA—Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, 1495-165 Lisboa, Portugal;
| | - Lia Godinho
- ICNF—Instituto de Conservação da Natureza e Florestas, Av. da República, 16, 1050-191 Lisboa, Portugal;
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24
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Liu R, Cui B, Dong W, Fang X, Xiao Y, Zhao X, Cui T, Ma Y, Wang Q. A refined deep-learning-based algorithm for harmful-algal-bloom remote-sensing recognition using Noctiluca scintillans algal bloom as an example. JOURNAL OF HAZARDOUS MATERIALS 2024; 467:133721. [PMID: 38341893 DOI: 10.1016/j.jhazmat.2024.133721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 02/01/2024] [Accepted: 02/03/2024] [Indexed: 02/13/2024]
Abstract
Harmful algal blooms (HABs) are challenging to recognize because of their striped and uneven biomass distributions. To address this issue, a refined deep-learning algorithm termed HAB-Ne was developed for the recognition of HABs in GF-1 Wide Field of View (WFV) images using Noctiluca scintillans algal bloom as an example. First, a pretrained image super-resolution model was integrated to improve the spatial resolution of the GF-1 WFV images and minimize the impact of mixed pixels caused by the strip distribution. Side-window convolution was also explored to enhance the edge features of HABs and minimize the effects of uneven biomass distribution. In addition, a convolutional encoder-decoder network was constructed for threshold-free HAB recognition to address the dependence on thresholds in existing methods. HAB-Net effectively recognized HABs from GF-1 WFV images, achieving an average precision of 90.1% and an F1-score of 0.86. HAB-Net showed more fine-grained recognition results than those of existing methods, with over 4% improvement in the F1-Score, especially in the marginal areas of HAB distribution. The algorithm demonstrated its effectiveness in recognizing HABs in different marine environments, such as the Yellow Sea, East China Sea, and northern Vietnam. Additionally, the algorithm was proven suitable for detecting the macroalga Sargassum. This study demonstrates the potential of deep-learning-based fine-grained recognition of HABs, which can be extended to the recognition of other fine-scale and strip-distributed objects, such as oil spills and Ulva prolifera.
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Affiliation(s)
- Rongjie Liu
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China.
| | - Binge Cui
- College of Computer Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Wenwen Dong
- College of Computer Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Xi Fang
- College of Computer Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Yanfang Xiao
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Xin Zhao
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; College of Computer Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Tingwei Cui
- School of Atmosphere Sciences, Sun Yat-Sen University & Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China; Key Laboratory of Tropical Atmosphere-Ocean System, Ministry of Education, Zhuhai 519082, China
| | - Yi Ma
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Quanbin Wang
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
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25
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Nederlof RA, van der Veen D, Perrault JR, Bast R, Barron HW, Bakker J. Emerging Insights into Brevetoxicosis in Sea Turtles. Animals (Basel) 2024; 14:991. [PMID: 38612230 PMCID: PMC11010821 DOI: 10.3390/ani14070991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 04/14/2024] Open
Abstract
This review summarizes the current understanding of how brevetoxins, produced by Karenia brevis during harmful algal blooms, impact sea turtle health. Sea turtles may be exposed to brevetoxins through ingestion, inhalation, maternal transfer, and potentially absorption through the skin. Brevetoxins bind to voltage-gated sodium channels in the central nervous system, disrupting cellular function and inducing neurological symptoms in affected sea turtles. Moreover, the current evidence suggests a broader and longer-term impact on sea turtle health beyond what is seen during stranding events. Diagnosis relies on the detection of brevetoxins in tissues and plasma from stranded turtles. The current treatment of choice, intravenous lipid emulsion therapy, may rapidly reduce symptoms and brevetoxin concentrations, improving survival rates. Monitoring, prevention, and control strategies for harmful algal blooms are discussed. However, as the frequency and severity of blooms are expected to increase due to climate change and increased environmental pollution, continued research is needed to better understand the sublethal effects of brevetoxins on sea turtles and the impact on hatchlings, as well as the pharmacokinetic mechanisms underlying brevetoxicosis. Moreover, research into the optimization of treatments may help to protect endangered sea turtle populations in the face of this growing threat.
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Affiliation(s)
| | | | - Justin R. Perrault
- Loggerhead Marinelife Center, Juno Beach, FL 33408, USA; (J.R.P.); (H.W.B.)
| | - Robin Bast
- Clinic for the Rehabilitation of Wildlife, Inc., Sanibel, FL 33957, USA;
| | - Heather W. Barron
- Loggerhead Marinelife Center, Juno Beach, FL 33408, USA; (J.R.P.); (H.W.B.)
| | - Jaco Bakker
- Animal Science Department, Biomedical Primate Research Centre, Lange Kleiweg 161, 2288 GJ Rijswijk, The Netherlands;
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26
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Díaz-Alonso A, Rodríguez F, Riobó P, Álvarez-Salgado X, Teira E, Fernández E. Response of the toxic dinoflagellate Alexandrium minutum to exudates of the eelgrass Zostera marina. HARMFUL ALGAE 2024; 133:102605. [PMID: 38485446 DOI: 10.1016/j.hal.2024.102605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/15/2024] [Accepted: 02/20/2024] [Indexed: 03/19/2024]
Abstract
Biotic interactions are a key factor in the development of harmful algal blooms. Recently, a lower abundance of planktonic dinoflagellates has been reported in areas dominated by seagrass beds, suggesting a negative interaction between both groups of organisms. The interaction between planktonic dinoflagellates and marine phanerogams, as well as the way in which bacteria can affect this interaction, was studied in two experiments using a non-axenic culture of the toxic dinoflagellate Alexandrium minutum exposed to increasing additions of eelgrass (Zostera marina) exudates from old and young leaves and to the presence or absence of antibiotics. In these experiments, A. minutum abundance, growth rate and photosynthetic efficiency (Fv/Fm), as well as bacterial abundance, were measured every 48 h. Toxin concentration per cell was determined at the end of both experiments. Our results demonstrated that Z. marina exudates reduced A. minutum growth rate and, in one of the experiments, also the photosynthetic efficiency. These results are not an indirect effect mediated by the bacteria in the culture, although their growth modify the magnitude of the negative impact on the dinoflagellate growth rate. No clear pattern was observed in the variation of toxin production with the treatments.
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Affiliation(s)
| | - Francisco Rodríguez
- Centro Oceanográfico de Vigo, Instituto Español de Ocanografía, Consejo Superior de Investigaciones Científicas, Spain
| | - Pilar Riobó
- Instituto de Investigacións Mariñas, Consejo Superior de Investigaciones Científicas, Spain
| | - Xose Álvarez-Salgado
- Instituto de Investigacións Mariñas, Consejo Superior de Investigaciones Científicas, Spain
| | - Eva Teira
- Centro de Investigación Mariña, Universidade de Vigo, Vigo, Spain
| | - Emilio Fernández
- Centro de Investigación Mariña, Universidade de Vigo, Vigo, Spain
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27
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Telesh I, Schubert H, Skarlato S. Wide ecological niches ensure frequent harmful dinoflagellate blooms. Heliyon 2024; 10:e26495. [PMID: 38404903 PMCID: PMC10884921 DOI: 10.1016/j.heliyon.2024.e26495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 02/08/2024] [Accepted: 02/14/2024] [Indexed: 02/27/2024] Open
Abstract
Harmful algal blooms (HABs) and their consequences cause multiple devastating effects in various freshwater, brackish and marine ecosystems. However, HAB species at moderate population densities have positive ecological roles as primary producers of organic matter and food for zooplankton and fish. They also enhance benthic-pelagic coupling and participate in the biogeochemical cycles. The consequences of HABs are transported across the conventional environmental boundaries by numerous cascade effects in the food webs and beyond. Meanwhile, forecasts of bloom events are still limited, largely because of scarcity of reliable information on ecological niches of the bloom-forming algae. To fill up this knowledge gap, this study focused on dinoflagellates, a diverse group of mostly photosynthesizing protists (unicellular eukaryotes) capable of mixotrophy, since they play a key role in primary production and formation of blooms in marine and brackish waters worldwide. In this study, ecological niches of 17 abundant bloom-forming dinoflagellate species from coastal regions of the southern Baltic Sea were identified for the first time. It was hypothesized that wider ecological niches ensure more frequent dinoflagellate blooms compared to the species with narrower niches. This hypothesis was verified using the long-term (44 years) database on phytoplankton abundance and physical-chemical characteristics of the environment. It were analyzed 4534 datasets collected from 1972 to 2016. Fourteen abiotic parameters (water temperature, salinity, Secchi depth, pH, Chl a, and concentration of basic nutrients) were considered as ecological niche dimensions. The Principal Component Analysis presented the dissolved inorganic nitrogen, total nitrogen, Chl a, and temperature as principal niche dimensions of dinoflagellates. The algal bloom criteria were refined. It was for the first time proved statistically that HAB frequency of dinoflagellate species robustly correlated with the width of their ecological niches.
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Affiliation(s)
- Irena Telesh
- Zoological Institute of the Russian Academy of Sciences, St. Petersburg 199034, Russia
| | - Hendrik Schubert
- Institute of Biological Sciences, University of Rostock, Rostock 18059, Germany
| | - Sergei Skarlato
- Institute of Cytology of the Russian Academy of Sciences, St. Petersburg 194064, Russia
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Zhang W, Ye Z, Qu P, Li D, Gao H, Liang Y, He Z, Tong M. Using solid phase adsorption toxin tracking and extended local similarity analysis to monitor lipophilic shellfish toxins in a mussel culture ranch in the Yangtze River Estuary. MARINE POLLUTION BULLETIN 2024; 199:116027. [PMID: 38217914 DOI: 10.1016/j.marpolbul.2024.116027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 01/03/2024] [Accepted: 01/03/2024] [Indexed: 01/15/2024]
Abstract
Harmful algal blooms (HABs) and their associated phycotoxins are increasing globally, posing great threats to local coastal ecosystems and human health. Nutrients have been carried by the freshwater Yangtze River and have entered the estuary, which was reported to be a biodiversity-rich but HAB-frequent region. Here, in situ solid phase adsorption toxin tracking (SPATT) was used to monitor lipophilic shellfish toxins (LSTs) in seawaters, and extended local similarity analysis (eLSA) was conducted to trace the temporal and special regions of those LSTs in a one-year trail in a mussel culture ranch in the Yangtze River Estuary. Nine analogs of LSTs, including okadaic acid (OA), dinophysistoxin-1 (DTX1), yessotoxin (YTX), homoyessotoxin (homoYTX), 45-OH-homoYTX, pectenotoxin-2 (PTX2), 7-epi-PTX2 seco acid (7-epi-PTX2sa), gymnodimine (GYM) and azaspiracids-3 (AZA3), were detected in seawater (SPATT) or rope farmed mussels. The concentrations of OA + DTX1 and homoYTX in mussels were positively correlated with those in SPATT samplers (Pearson test, p < 0.05), indicating that SPATT (with resin HP20) would be a good monitoring tool and potential indicator for OA + DTX1 and homoYTX in mussel Mytilus coruscus. The eLSA results indicated that late summer and early autumn were the most phycotoxin-contaminated seasons in the Yangtze River Estuary. OA + DTX1, homoYTX, PTX2 and GYM were most likely driven by the local growing HAB species in spring and summer, while Yangtze River diluted water may impact the accumulation of HAB species, causing potential phycotoxin contamination in the Yangtze River Estuary in autumn and winter. Together, the results showed that the mussel harvesting season, late summer and early autumn, would be the season with the greatest phycotoxin risk and would be the most contaminated by local growing toxic algae. Routine monitoring sites should be set up close to the local seawaters.
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Affiliation(s)
- Wenguang Zhang
- Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Zi Ye
- Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Peipei Qu
- Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Dongmei Li
- Ocean College, Zhejiang University, Zhoushan 316021, China; Dalian Phycotoxins Key Laboratory, National Marine Environmental Monitoring Center, Ministry of Ecological Environment, Dalian 116023, China
| | - Han Gao
- Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Yubo Liang
- Dalian Phycotoxins Key Laboratory, National Marine Environmental Monitoring Center, Ministry of Ecological Environment, Dalian 116023, China
| | - Zhiguo He
- Ocean College, Zhejiang University, Zhoushan 316021, China; Hainan Institute of Zhejiang University, Sanya 572025, China
| | - Mengmeng Tong
- Ocean College, Zhejiang University, Zhoushan 316021, China; Hainan Institute of Zhejiang University, Sanya 572025, China.
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Abdulhussain AH, Cook KB, Bresnan E, Lacaze JP, Mayor DJ. The influence of the toxin-producing dinoflagellate, Alexandrium catenella, on feeding, reproduction and toxin retention in Calanus helgolandicus. HARMFUL ALGAE 2024; 132:102564. [PMID: 38331536 DOI: 10.1016/j.hal.2023.102564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 11/15/2023] [Accepted: 12/20/2023] [Indexed: 02/10/2024]
Abstract
Copepods of the genus Calanus dominate the biomass of pelagic ecosystems from the Mediterranean Sea up into the Arctic Ocean and form an important link between phytoplankton and higher trophic levels. Impacts from toxin-producing harmful algae (HA) have been recorded throughout this region over the last 50 years, with potentially negative effects on Calanus spp. populations and the ecosystem functions and services they provide. Here we examine how ingestion, egg-production and egg-viability in Calanus helgolandicus are affected by the relative abundance of the toxin-producing dinoflagellate Alexandrium catenella in their diet. Our four-day experiments demonstrate that the ingestion rate of C. helgolandicus declined significantly as the percentage of toxin-producing A. catenella within their diet increased, whereas egg production and egg viability were unaffected. Toxin profile concentrations for A. catenella are presented alongside body toxin-loads in C. helgolandicus after 4 days of feeding on these cells. The body toxin concentrations of C. helgolandicus were 3.6-356.6 pg STX diHCl eq. copepod-1, approximately 0.02-3.3 % of the toxins ingested. Our work suggests that the effects of exposure to A. catenella may be negligible in the short-term but could manifest if bloom conditions persist for longer than our experimental duration.
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Affiliation(s)
- Ali H Abdulhussain
- National Oceanography Centre, Southampton, United Kingdom; School of Ocean and Earth Sciences, University of Southampton, National Oceanography Centre, Southampton, United Kingdom; Department of Marine Science, Kuwait University, Fintas, Kuwait.
| | - Kathryn B Cook
- National Oceanography Centre, Southampton, United Kingdom; Marine Scotland Science, Marine Laboratory, Aberdeen, United Kingdom; Biosciences, University of Exeter, Exeter, United Kingdom
| | - Eileen Bresnan
- Marine Scotland Science, Marine Laboratory, Aberdeen, United Kingdom
| | | | - Daniel J Mayor
- National Oceanography Centre, Southampton, United Kingdom; Biosciences, University of Exeter, Exeter, United Kingdom
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30
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Rosales SA, Díaz PA, Muñoz P, Álvarez G. Modeling the dynamics of harmful algal bloom events in two bays from the northern Chilean upwelling system. HARMFUL ALGAE 2024; 132:102583. [PMID: 38331541 DOI: 10.1016/j.hal.2024.102583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 01/08/2024] [Accepted: 01/15/2024] [Indexed: 02/10/2024]
Abstract
The bays of Tongoy and Guanaqueros are located in the Humboldt Current system, where Argopecten purpuratus has been the subject of intense aquaculture development. These bays lie in one of the most productive marine ecosystems on Earth and are dominated by permanent coastal upwelling at Lengua de Vaca Point and Choros Point, one of the three upwelling centers on the Chilean coast. Significantly, this productive system experiences a high recurrence of harmful algal bloom (HAB) events. This paper examines 9-year (2010-2018) samples of three toxic microalgal species collected in different monitoring programs and research projects. During this period, nine HAB events were detected in Guanaqueros Bay and 14 in Tongoy Bay. Among these, three HAB events were produced simultaneously in both bays by Pseudo-nitzschia australis, and two events produced simultaneously were detected in one bay by Alexandrium spp. and the other by Dinophysis acuminata. Before El Niño 2015-16, there were more HAB events of longer duration by the three species. Since El Niño, the number and duration of events were reduced and only produced by P. australis. HAB events were simulated with the FVCOM model and a virtual particle tracker model to evaluate the dynamics of bays and their relationship with HAB events. The results showed retention in bays during the relaxation conditions of upwelling and low connectivity between bays, which explains why almost no simultaneous events were recorded.
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Affiliation(s)
- Sergio A Rosales
- Programa de Doctorado en Biología y Ecología Aplicada, Universidad Católica del Norte, Coquimbo, Chile; Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile.
| | - Patricio A Díaz
- Centro i∼mar & CeBiB, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
| | - Práxedes Muñoz
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile
| | - Gonzalo Álvarez
- Departamento de Acuicultura, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile
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31
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Alvarez S, Brown CE, Garcia Diaz M, O'Leary H, Solís D. Non-linear impacts of harmful algae blooms on the coastal tourism economy. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 351:119811. [PMID: 38157578 DOI: 10.1016/j.jenvman.2023.119811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/16/2023] [Accepted: 12/07/2023] [Indexed: 01/03/2024]
Abstract
Harmful algae blooms (HABs) occur in water bodies throughout the globe and can have multi-faceted impacts on tourism. However, little is known of the magnitude of economic losses to the tourism sector as a result of HABs. There is limited understanding of the empirical relationships between HAB intensity and duration, and the effects of this phenomenon on the tourism sector. This study is based in the state of Florida, USA, a notable sun, sand, and sea destination in the western hemisphere, where blooms of a marine harmful algae are a recurrent threat to coastal tourism. The empirical framework is based on a month and county-level panel database that combines sales by tourism-related businesses with observations from the official HAB surveillance system of the state of Florida. We use time and space fixed-effects regressions to estimate the loss in tourism revenue associated with one additional day of red tide. Results indicate that impacts of HABs on tourism do not follow a linear pattern with increasing HAB concentrations, but rather appear to follow an inverted-U pattern. In other words, higher concentrations of the HAB organism do not necessarily imply higher economic losses, suggesting that the impacts of HABs on tourism are not driven solely by the biophysical element of cell density. Rather, these impacts appear to be mediated and amplified by human dimensions. The loss to tourism-related businesses due to the 2018 Florida red tide bloom was estimated to be $2.7 billion USD, which implies that HABs and their impact on tourism can be considered as a potential 'billion-dollar' disaster.
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Affiliation(s)
- Sergio Alvarez
- University of Central Florida, Rosen College of Hospitality Management, USA.
| | - Christina E Brown
- United States Department of Agriculture, Economic Research Service, USA
| | - Marc Garcia Diaz
- University of Central Florida, Rosen College of Hospitality Management, USA
| | - Heather O'Leary
- University of South Florida, Department of Anthropology, USA
| | - Daniel Solís
- Florida A&M University, College of Agriculture and Food Sciences, USA
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Li DW, Tan JZ, Li ZF, Ou LJ. Membrane lipid remodeling and autophagy to cope with phosphorus deficiency in the dinoflagellate Prorocentrum shikokuense. CHEMOSPHERE 2024; 349:140844. [PMID: 38042419 DOI: 10.1016/j.chemosphere.2023.140844] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/26/2023] [Accepted: 11/27/2023] [Indexed: 12/04/2023]
Abstract
Dinoflagellates, which are responsible for more than 80% of harmful algal blooms in coastal waters, are competitive in low-phosphate environments. However, the specific acclimated phosphorus strategies to adapt to phosphorus deficiency in dinoflagellates, particularly through intracellular phosphorus metabolism, remain largely unknown. Comprehensive physiological, biochemical, and transcriptomic analyses were conducted to investigate intracellular phosphorus modulation in a model dinoflagellate, Prorocentrum shikokuense, with a specific focus on membrane lipid remodeling and autophagy in response to phosphorus deficiency. Under phosphorus deficiency, P. shikokuense exhibited a preference to spare phospholipids with nonphospholipids. The major phospholipid classes of phosphatidylcholine and phosphatidylethanolamine decreased in content, whereas the betaine lipid class of diacylglyceryl carboxyhydroxymethylcholine increased in content. Furthermore, under phosphorus deficiency, P. shikokuense induced autophagy as a mechanism to conserve and recycle cellular phosphorus resources. The present study highlights the effective modulation of intracellular phosphorus in P. shikokuense through membrane phospholipid remodeling and autophagy and contributes to a comprehensive understanding of the acclimation strategies to low-phosphorus conditions in dinoflagellates.
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Affiliation(s)
- Da-Wei Li
- College of Life Science and Technology, and Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, Jinan University, Guangzhou, China
| | - Jin-Zhou Tan
- College of Life Science and Technology, and Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, Jinan University, Guangzhou, China
| | - Zhuo-Fan Li
- College of Life Science and Technology, and Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, Jinan University, Guangzhou, China
| | - Lin-Jian Ou
- College of Life Science and Technology, and Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institute, Jinan University, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China.
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33
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Garamszegi SP, Brzostowicki DJ, Coyne TM, Vontell RT, Davis DA. TDP-43 and Alzheimer's Disease Pathology in the Brain of a Harbor Porpoise Exposed to the Cyanobacterial Toxin BMAA. Toxins (Basel) 2024; 16:42. [PMID: 38251257 PMCID: PMC10821503 DOI: 10.3390/toxins16010042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/30/2023] [Accepted: 01/10/2024] [Indexed: 01/23/2024] Open
Abstract
Cetaceans are well-regarded as sentinels for toxin exposure. Emerging studies suggest that cetaceans can also develop neuropathological changes associated with neurodegenerative disease. The occurrence of neuropathology makes cetaceans an ideal species for examining the impact of marine toxins on the brain across the lifespan. Here, we describe TAR DNA-binding protein 43 (TDP-43) proteinopathy and Alzheimer's disease (AD) neuropathological changes in a beached harbor porpoise (Phocoena phocoena) that was exposed to a toxin produced by cyanobacteria called β-N-methylamino-L-alanine (BMAA). We found pathogenic TDP-43 cytoplasmic inclusions in neurons throughout the cerebral cortex, midbrain and brainstem. P62/sequestosome-1, responsible for the autophagy of misfolded proteins, was observed in the amygdala, hippocampus and frontal cortex. Genes implicated in AD and TDP-43 neuropathology such as APP and TARDBP were expressed in the brain. AD neuropathological changes such as amyloid-β plaques, neurofibrillary tangles, granulovacuolar degeneration and Hirano bodies were present in the hippocampus. These findings further support the development of progressive neurodegenerative disease in cetaceans and a potential causative link to cyanobacterial toxins. Climate change, nutrient pollution and industrial waste are increasing the frequency of harmful cyanobacterial blooms. Cyanotoxins like BMAA that are associated with neurodegenerative disease pose an increasing public health risk.
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Affiliation(s)
- Susanna P. Garamszegi
- Department of Neurology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Daniel J. Brzostowicki
- Department of Neurology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Thomas M. Coyne
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL 32610, USA
| | - Regina T. Vontell
- Department of Neurology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - David A. Davis
- Department of Neurology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
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34
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Chen M, Jiang S, Han A, Yang M, Tkalich P, Liu M. Bunkering for change: Knowledge preparedness on the environmental aspect of ammonia as a marine fuel. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 907:167677. [PMID: 37832674 DOI: 10.1016/j.scitotenv.2023.167677] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 10/15/2023]
Abstract
Nitrogen cycling is essential to ecosystem functioning and the overall health of our planet. Ammonia, a nitrogen-containing product, as well as a nutrient, is promoted as a low-carbon fuel for the maritime sector, with spectacular production increase in plan. Similar to any other widespread fuels in the past, it is paramount to be prepared for the potential environmental impact of ammonia fuel. Here, through our preliminary calculations using literature data, we suggest that the amount of ammonia to be produced to fulfil the maritime energy need by 2050 may entail large alterations in global nitrogen cycling. Currently, the literature based on limited known cases of ammonia excess is insufficient to quantify the environmental impacts caused by the probable increase in bunkering ammonia release at global scale. With a few knowledge gaps identified, we call on the marine science community to investigate the potential environmental impact related to substantial ammonia excess, contributing new knowledge to a more environmentally sustainable future.
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Affiliation(s)
- Mengli Chen
- Tropical Marine Science Institute, National University of Singapore, Singapore 119227, Singapore.
| | - Shan Jiang
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
| | - Aiqin Han
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Mengyao Yang
- Maritime Energy & Sustainable Development Centre of Excellence, Nanyang Technological University, Singapore 639798, Singapore
| | - Pavel Tkalich
- Tropical Marine Science Institute, National University of Singapore, Singapore 119227, Singapore
| | - Ming Liu
- Maritime Energy & Sustainable Development Centre of Excellence, Nanyang Technological University, Singapore 639798, Singapore
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Accoroni S, Cangini M, Angeletti R, Losasso C, Bacchiocchi S, Costa A, Taranto AD, Escalera L, Fedrizzi G, Garzia A, Longo F, Macaluso A, Melchiorre N, Milandri A, Milandri S, Montresor M, Neri F, Piersanti A, Rubini S, Suraci C, Susini F, Vadrucci MR, Mudadu AG, Vivaldi B, Soro B, Totti C, Zingone A. Marine phycotoxin levels in shellfish-14 years of data gathered along the Italian coast. HARMFUL ALGAE 2024; 131:102560. [PMID: 38212084 DOI: 10.1016/j.hal.2023.102560] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 11/27/2023] [Accepted: 12/06/2023] [Indexed: 01/13/2024]
Abstract
Along the Italian coasts, toxins of algal origin in wild and cultivated shellfish have been reported since the 1970s. In this study, we used data gathered by the Veterinary Public Health Institutes (IZS) and the Italian Environmental Health Protection Agencies (ARPA) from 2006 to 2019 to investigate toxicity events along the Italian coasts and relate them to the distribution of potentially toxic species. Among the detected toxins (OA and analogs, YTXs, PTXs, STXs, DAs, AZAs), OA and YTX were those most frequently reported. Levels exceeding regulatory limits in the case of OA (≤2,448 μg equivalent kg-1) were associated with high abundances of Dinophysis spp., and in the case of YTXs (≤22 mg equivalent kg-1) with blooms of Gonyaulax spinifera, Lingulodinium polyedra, and Protoceratium reticulatum. Seasonal blooms of Pseudo-nitzschia spp. occur all along the Italian coast, but DA has only occasionally been detected in shellfish at concentrations always below the regulatory limit (≤18 mg kg-1). Alexandrium spp. were recorded in several areas, although STXs (≤13,782 µg equivalent kg-1) rarely and only in few sites exceeded the regulatory limit in shellfish. Azadinium spp. have been sporadically recorded, and AZAs have been sometimes detected but always in low concentrations (≤7 µg equivalent kg-1). Among the emerging toxins, PLTX-like toxins (≤971 μg kg-1 OVTX-a) have often been detected mainly in wild mussels and sea urchins from rocky shores due to the presence of Ostreopsis cf. ovata. Overall, Italian coastal waters harbour a high number of potentially toxic species, with a few HAB hotspots mainly related to DSP toxins. Nevertheless, rare cases of intoxications have occurred so far, reflecting the whole Mediterranean Sea conditions.
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Affiliation(s)
| | - Monica Cangini
- National Reference Laboratory for Marine Biotoxins, CRM, Cesenatico, FC, Italy
| | | | | | | | | | | | | | | | - Angela Garzia
- DiSVA, Università Politecnica delle Marche, Ancona, Italy
| | | | | | | | - Anna Milandri
- National Reference Laboratory for Marine Biotoxins, CRM, Cesenatico, FC, Italy
| | - Stefania Milandri
- National Reference Laboratory for Marine Biotoxins, CRM, Cesenatico, FC, Italy
| | | | - Francesca Neri
- DiSVA, Università Politecnica delle Marche, Ancona, Italy
| | | | - Silva Rubini
- IZS della Lombardia e dell'Emilia-Romagna, Ferrara, Italy
| | | | | | | | | | | | | | - Cecilia Totti
- DiSVA, Università Politecnica delle Marche, Ancona, Italy
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Armbrecht L, Bolch CJS, Paine B, Cooper A, McMinn A, Woodward C, Hallegraeff G. Recovering sedimentary ancient DNA of harmful dinoflagellates accumulated over the last 9000 years off Eastern Tasmania, Australia. ISME COMMUNICATIONS 2024; 4:ycae098. [PMID: 39165395 PMCID: PMC11334580 DOI: 10.1093/ismeco/ycae098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/31/2024] [Accepted: 07/14/2024] [Indexed: 08/22/2024]
Abstract
Harmful algal blooms (HABs) have had significant adverse impacts on the seafood industry along the Tasmanian east coast over the past 4 decades. To investigate the history of regional HABs, we performed analyses of sedimentary ancient DNA (sedaDNA) in coastal sediments up to ~9000 years old collected inshore and offshore of Maria Island, Tasmania. We used metagenomic shotgun sequencing and a hybridisation capture array ("HABbaits1") to target three harmful dinoflagellate genera, Alexandrium, Gymnodinium, and Noctiluca. Bioinformatic and DNA damage analyses verified the authenticity of the sedaDNA sequences. Our results show that dinoflagellates of Alexandrium genera have been present off eastern Tasmania during the last ~8300 years, and we sporadically detected and unambiguously verified sequences of Gymnodinium catenatum that were present offshore up to ~7600 years ago. We also recovered sedaDNA of the fragile, soft-bodied Noctiluca scintillans with increased relative abundance since 2010, consistent with plankton surveys. This study enabled us to identify challenges of sedaDNA sequence validation (in particular for G. catenatum, a microreticulate gymnodinoid species) and provided guidance for the development of tools to monitor past and present HAB species and improvement of future HAB event predictions.
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Affiliation(s)
- Linda Armbrecht
- Institute for Marine and Antarctic Studies, University of Tasmania, Battery Point, TAS 7004, Australia
- Australian Centre for Ancient DNA, School of Biological Sciences, Faculty of Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Christopher J S Bolch
- Institute for Marine and Antarctic Studies, University of Tasmania, Battery Point, TAS 7004, Australia
| | - Bradley Paine
- Institute for Marine and Antarctic Studies, University of Tasmania, Battery Point, TAS 7004, Australia
| | - Alan Cooper
- Gulbali Institute, Agriculture, Water and Environment, Charles Sturt University, Albury, NSW 2640, Australia
| | - Andrew McMinn
- Institute for Marine and Antarctic Studies, University of Tasmania, Battery Point, TAS 7004, Australia
| | - Craig Woodward
- Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
| | - Gustaaf Hallegraeff
- Institute for Marine and Antarctic Studies, University of Tasmania, Battery Point, TAS 7004, Australia
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37
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Xiao X, Peng Y, Zhang W, Yang X, Zhang Z, Ren B, Zhu G, Zhou S. Current status and prospects of algal bloom early warning technologies: A Review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 349:119510. [PMID: 37951110 DOI: 10.1016/j.jenvman.2023.119510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/21/2023] [Accepted: 10/31/2023] [Indexed: 11/13/2023]
Abstract
In recent years, frequent occurrences of algal blooms due to environmental changes have posed significant threats to the environment and human health. This paper analyzes the reasons of algal bloom from the perspective of environmental factors such as nutrients, temperature, light, hydrodynamics factors and others. Various commonly used algal bloom monitoring methods are discussed, including traditional field monitoring methods, remote sensing techniques, molecular biology-based monitoring techniques, and sensor-based real-time monitoring techniques. The advantages and limitations of each method are summarized. Existing algal bloom prediction models, including traditional models and machine learning (ML) models, are introduced. Support Vector Machine (SVM), deep learning (DL), and other ML models are discussed in detail, along with their strengths and weaknesses. Finally, this paper provides an outlook on the future development of algal bloom warning techniques, proposing to combine various monitoring methods and prediction models to establish a multi-level and multi-perspective algal bloom monitoring system, further improving the accuracy and timeliness of early warning, and providing more effective safeguards for environmental protection and human health.
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Affiliation(s)
- Xiang Xiao
- College of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
| | - Yazhou Peng
- College of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Wei Zhang
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha, 410114, China.
| | - Xiuzhen Yang
- College of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
| | - Zhi Zhang
- Laboratory of Three Gorges Reservoir Region, Chongqing University, Chongqing, 400045, China
| | - Bozhi Ren
- School of Earth Sciences and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China
| | - Guocheng Zhu
- College of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
| | - Saijun Zhou
- College of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
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38
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Rosic N, Thornber C. Biotechnological Potential of Macroalgae during Seasonal Blooms for Sustainable Production of UV-Absorbing Compounds. Mar Drugs 2023; 21:633. [PMID: 38132954 PMCID: PMC10744652 DOI: 10.3390/md21120633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/27/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023] Open
Abstract
Marine macroalgae (seaweeds) are important primary global producers, with a wide distribution in oceans around the world from polar to tropical regions. Most of these species are exposed to variable environmental conditions, such as abiotic (e.g., light irradiance, temperature variations, nutrient availability, salinity levels) and biotic factors (e.g., grazing and pathogen exposure). As a result, macroalgae developed numerous important strategies to increase their adaptability, including synthesizing secondary metabolites, which have promising biotechnological applications, such as UV-absorbing Mycosporine-Like Amino Acid (MAAs). MAAs are small, water-soluble, UV-absorbing compounds that are commonly found in many marine organisms and are characterized by promising antioxidative, anti-inflammatory and photoprotective properties. However, the widespread use of MAAs by humans is often restricted by their limited bioavailability, limited success in heterologous expression systems, and low quantities recovered from the natural environment. In contrast, bloom-forming macroalgal species from all three major macroalgal clades (Chlorophyta, Phaeophyceae, and Rhodophyta) occasionally form algal blooms, resulting in a rapid increase in algal abundance and high biomass production. This review focuses on the bloom-forming species capable of producing pharmacologically important compounds, including MAAs, and the application of proteomics in facilitating macroalgal use in overcoming current environmental and biotechnological challenges.
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Affiliation(s)
- Nedeljka Rosic
- Faculty of Health, Southern Cross University, Gold Coast, QLD 4225, Australia
- Marine Ecology Research Centre, Southern Cross University, Lismore, NSW 2480, Australia
| | - Carol Thornber
- Department of Natural Resources Science, University of Rhode Island, 120 Flagg Road, Kingston, RI 02881, USA;
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Chen YT, Mundle SOC, Reid T, Weisener C. Nutrient variability and sediment contribution along a mixed land-use within Sturgeon Creek- Lake Erie watershed. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 347:119139. [PMID: 37748294 DOI: 10.1016/j.jenvman.2023.119139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 07/20/2023] [Accepted: 09/21/2023] [Indexed: 09/27/2023]
Affiliation(s)
- Yu-Ting Chen
- Great Lakes Institute of Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, N9B 3P4, Canada
| | - Scott O C Mundle
- Great Lakes Institute of Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, N9B 3P4, Canada
| | - Tom Reid
- Environment and Climate Change Canada, Water Science and Technology Branch, Canada Centre for Inland Waters, Burlington, Ontario L7S 1A1, Canada
| | - Christopher Weisener
- Great Lakes Institute of Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, N9B 3P4, Canada.
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Kim M, Hong S, Lim YK, Cha J, Kim Y, Lee CE, Yoon JN, Lee HS, Baek SH. Monthly distribution of lipophilic marine biotoxins and associated microalgae in the South Sea Coast of Korea throughout 2021. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 898:165472. [PMID: 37442466 DOI: 10.1016/j.scitotenv.2023.165472] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 06/26/2023] [Accepted: 07/09/2023] [Indexed: 07/15/2023]
Abstract
Aquaculture farms have been established along the South Sea Coast of Korea, supplying most of the seafood consumed domestically. However, annual harmful algal blooms pose a potential threat to seafood safety. This study aimed to determine the spatial and seasonal distributions of 12 lipophilic marine biotoxins (LMTs) in phytoplankton and mussels in the region in 2021. Solid-phase adsorption toxin tracking (SPATT) was used to monitor the cumulative compositions of LMTs in seawater. LMT concentrations were also determined in twelve commercially available species of domestic shellfish to evaluate the potential risks to human health. Gonyaulux spinifera and Dinophysis acuminata, causative microalgae of yessotoxins (YTXs) and pectenotoxins (PTXs), respectively, showed high densities in the region from May to July. This period corresponded to high LMT concentrations in phytoplankton and mussels. Phytoplankton mainly contained PTX-2 and homo-YTX, with a maximum concentration of 2300 ng g-1 wet weight (ww) in May. In contrast, mussels mainly contained homo-YTX and YTX, with a maximum concentration of 1300 ng g-1 ww in July. LMTs-producing microalgae showed low densities and concentrations after July, whereas mussels accumulated toxins until September. In the SPATT sampler, more diverse LMTs were detected than in seawater, phytoplankton, and mussels. For example, dinophysistoxin-1 and azaspiracid-2 were detected only in SPATT. YTXs were detected in domestic seafood samples, including mussels, red scallops, and pen shells, but the concentrations were below the European Food Safety Agency recommended standard of 3.75 mg YTX-eq. kg-1. Moreover, the hazard quotient was less than 100 in all scenarios, indicating that the human health risk was not significant. This study provides valuable data on monthly distribution patterns of LMTs in the South Sea Coast of Korea and can serve as baseline data for future management policies of marine biotoxins.
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Affiliation(s)
- Mungi Kim
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Seongjin Hong
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea.
| | - Young Kyun Lim
- Risk Assessment Research Center, Korea Institute of Ocean Science and Technology, Geoje 53201, Republic of Korea
| | - Jihyun Cha
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Youngnam Kim
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Chang-Eon Lee
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Ji Nam Yoon
- Risk Assessment Research Center, Korea Institute of Ocean Science and Technology, Geoje 53201, Republic of Korea
| | - Hee-Seok Lee
- Department of Food Science and Technology, Chung-Ang University, Anseong 17546, Republic of Korea
| | - Seung Ho Baek
- Risk Assessment Research Center, Korea Institute of Ocean Science and Technology, Geoje 53201, Republic of Korea.
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Sibat M, Mai T, Tanniou S, Biegala I, Hess P, Jauffrais T. Seasonal Single-Site Sampling Reveals Large Diversity of Marine Algal Toxins in Coastal Waters and Shellfish of New Caledonia (Southwestern Pacific). Toxins (Basel) 2023; 15:642. [PMID: 37999505 PMCID: PMC10674433 DOI: 10.3390/toxins15110642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 11/25/2023] Open
Abstract
Algal toxins pose a serious threat to human and coastal ecosystem health, even if their potential impacts are poorly documented in New Caledonia (NC). In this survey, bivalves and seawater (concentrated through passive samplers) from bays surrounding Noumea, NC, collected during the warm and cold seasons were analyzed for algal toxins using a multi-toxin screening approach. Several groups of marine microalgal toxins were detected for the first time in NC. Okadaic acid (OA), azaspiracid-2 (AZA2), pectenotoxin-2 (PTX2), pinnatoxin-G (PnTX-G), and homo-yessotoxin (homo-YTX) were detected in seawater at higher levels during the summer. A more diversified toxin profile was found in shellfish with brevetoxin-3 (BTX3), gymnodimine-A (GYM-A), and 13-desmethyl spirolide-C (SPX1), being confirmed in addition to the five toxin groups also found in seawater. Diarrhetic and neurotoxic toxins did not exceed regulatory limits, but PnTX-G was present at up to the limit of the threshold recommended by the French Food Safety Authority (ANSES, 23 μg kg-1). In the present study, internationally regulated toxins of the AZA-, BTX-, and OA-groups by the Codex Alimentarius were detected in addition to five emerging toxin groups, indicating that algal toxins pose a potential risk for the consumers in NC or shellfish export.
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Affiliation(s)
- Manoëlla Sibat
- Ifremer, ODE/PHYTOX/METALG, Rue de l’île d’Yeu, F-44300 Nantes, France;
| | - Tepoerau Mai
- Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, CNRS, UMR 9220 ENTROPIE, 98800 Nouméa, New Caledonia; (T.M.); (T.J.)
- Institut Louis Malardé (ILM), 98713 Papeete, Tahiti, French Polynesia
| | - Simon Tanniou
- Ifremer, ODE/PHYTOX/METALG, Rue de l’île d’Yeu, F-44300 Nantes, France;
| | - Isabelle Biegala
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, UM110, 13288 Marseille, France;
| | - Philipp Hess
- Ifremer, ODE/PHYTOX/METALG, Rue de l’île d’Yeu, F-44300 Nantes, France;
| | - Thierry Jauffrais
- Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, CNRS, UMR 9220 ENTROPIE, 98800 Nouméa, New Caledonia; (T.M.); (T.J.)
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Chinain M, Gatti Howell C, Roué M, Ung A, Henry K, Revel T, Cruchet P, Viallon J, Darius HT. Ciguatera poisoning in French Polynesia: A review of the distribution and toxicity of Gambierdiscus spp., and related impacts on food web components and human health. HARMFUL ALGAE 2023; 129:102525. [PMID: 37951623 DOI: 10.1016/j.hal.2023.102525] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 09/26/2023] [Accepted: 10/07/2023] [Indexed: 11/14/2023]
Abstract
Ciguatera Poisoning (CP) is a seafood poisoning highly prevalent in French Polynesia. This illness results from the consumption of seafood contaminated with ciguatoxins (CTXs) produced by Gambierdiscus, a benthic dinoflagellate. Ciguatera significantly degrades the health and economic well-being of local communities largely dependent on reef fisheries for their subsistence. French Polynesia has been the site of rich and active CP research since the 1960's. The environmental, toxicological, and epidemiological data obtained in the frame of large-scale field surveys and a country-wide CP case reporting program conducted over the past three decades in the five island groups of French Polynesia are reviewed. Results show toxin production in Gambierdiscus in the natural environment may vary considerably at a temporal and spatial scale, and that several locales clearly represent Gambierdiscus spp. "biodiversity hotspots". Current data also suggest the "hot" species G. polynesiensis could be the primary source of CTXs in local ciguateric biotopes, pending formal confirmation. The prevalence of ciguatoxic fish and the CTX levels observed in several locales were remarkably high, with herbivores and omnivores often as toxic as carnivores. Results also confirm the strong local influence of Gambierdiscus spp. on the CTX toxin profiles characterized across multiple food web components including in CP-prone marine invertebrates. The statistics, obtained in the frame of a long-term epidemiological surveillance program established in 2007, point towards an apparent decline in the number of CP cases in French Polynesia as a whole; however, incidence rates remain dangerously high in some islands. Several of the challenges and opportunities, most notably those linked to the strong cultural ramifications of CP among local communities, that need to be considered to define effective risk management strategies are addressed.
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Affiliation(s)
- M Chinain
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia.
| | - C Gatti Howell
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - M Roué
- Institut de Recherche pour le Développement (IRD), UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 6570, Faa'a, Tahiti 98702, French Polynesia
| | - A Ung
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - K Henry
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - T Revel
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - P Cruchet
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - J Viallon
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - H T Darius
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
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Bouquet A, Thébault A, Arnich N, Foucault E, Caillard E, Gianaroli C, Bellamy E, Rolland JL, Laabir M, Abadie E. Modelling spatiotemporal distributions of Vulcanodinium rugosum and pinnatoxin G in French Mediterranean lagoons: Application to human health risk characterisation. HARMFUL ALGAE 2023; 129:102500. [PMID: 37951616 DOI: 10.1016/j.hal.2023.102500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 08/16/2023] [Accepted: 09/07/2023] [Indexed: 11/14/2023]
Abstract
Consumption of seafood contaminated by phycotoxins produced by harmful algae is a major issue in human public health. Harmful algal blooms are driven by a multitude of environmental variables; therefore predicting human dietary exposure to phycotoxins based on these variables is a promising approach in health risk management. In this study, we attempted to predict the human health risks associated with Vulcanodinium rugosum and its neurotoxins, pinnatoxins (PnTXs), which have been regularly found in Mediterranean lagoons since their identification in 2011. Based on environmental variables collected over 1 year in four Mediterranean lagoons, we developed linear mixed models to predict the presence of V. rugosum and PnTX G contamination of mussels. We found that the occurrence of V. rugosum was significantly associated with seawater temperature. PnTX G contamination of mussels was highest in summer but persisted throughout the year. This contamination was significantly associated with seawater temperature and the presence of V. rugosum with a time lag, but not with dissolved PnTX G in seawater. By using the contamination model predictions and their potential variability/uncertainty, we calculated the human acute dietary exposures throughout the year and predicted that 25% of people who consume mussels could exceed the provisional acute benchmark value during the warmest periods. We suggest specific recommendations to monitor V. rugosum and PnTX G.
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Affiliation(s)
- Aurélien Bouquet
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, 87 Avenue Jean Monnet, 34200 Sète, France.
| | - Anne Thébault
- ANSES (French Agency for Food, Environmental and Occupational Health and Safety), Risk Assessment Directorate, Maisons-Alfort, France
| | - Nathalie Arnich
- ANSES (French Agency for Food, Environmental and Occupational Health and Safety), Risk Assessment Directorate, Maisons-Alfort, France
| | - Elodie Foucault
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, 87 Avenue Jean Monnet, 34200 Sète, France
| | - Elise Caillard
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, 87 Avenue Jean Monnet, 34200 Sète, France
| | - Camille Gianaroli
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, 87 Avenue Jean Monnet, 34200 Sète, France
| | - Elise Bellamy
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, 87 Avenue Jean Monnet, 34200 Sète, France
| | - Jean Luc Rolland
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, 87 Avenue Jean Monnet, 34200 Sète, France
| | - Mohamed Laabir
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Place Eugène Bataillon, 34095 Montpellier, France
| | - Eric Abadie
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, 87 Avenue Jean Monnet, 34200 Sète, France; IFREMER, Biodivenv, 79 Route de Pointe Fort, 97231 Martinique, France
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Yu Z, Tang Y, Gobler CJ. Harmful algal blooms in China: History, recent expansion, current status, and future prospects. HARMFUL ALGAE 2023; 129:102499. [PMID: 37951615 DOI: 10.1016/j.hal.2023.102499] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 08/28/2023] [Accepted: 09/02/2023] [Indexed: 11/14/2023]
Abstract
The impacts of harmful algal blooms (HABs) on economies, public health, ecosystems, and aquaculture across the globe have all increased in recent decades, and this has been acutely the case in China. Here, we review the history of HABs and HABs research in China, as well as recent trends in HABs and future prospects of HAB science in China. The most updated analyses demonstrated that the number of HAB events, the number of HAB species, the aerial coverage of HABs, and the impacts of HABs in Chinese waters during the 21st century were all higher than that during the last two decades of the 20th century. The increase in the number of HABs in China has been significantly correlated with the increased discharge of ammonium and total phosphorus into coastal waters (p < 0.01 for both). Notable newly recognized events this century have included chronic HABs caused by Prorocentrum donghaiense and Karenia mikimotoi, a paralytic shellfish poisoning event caused by Gymnodinium catenatum that sickened 80 people, brown tides caused by Aureococcus anophagefferens, green tides caused by Ulva prolifera, golden tides caused by Sargassum horneri, and the disruption of a nuclear power plant caused by a bloom of Phaeocystis globosa. A series of key discoveries regarding HABs has been made this century including documentation of nearly all known HAB toxins in Chinese waters, discovery of novel cyst-formation and/or life stages of multiple HABs-causing species, identification of the chemical and physical oceanographic drivers of multiple HABs including those formed by P. donghaiense, K. mikimotoi, and U. prolifera, and the successful mitigation of HABs via the use of modified clay approaches. Future research prospects highlighted include the use of macroalgae as a means to prevent, mitigate, and control (PCM) HABs and the process by which multi-disciplinary studies involving molecular approaches (omics), remote in situ detection, artificial intelligence, and mega-data analyses might be used to develop refined and realistic HAB forecasting platforms. Collectively, this review demonstrates the significant evolution of HAB science since the 20th century in China and demonstrates that while HABs in China are complex and widespread, recent and on-going discoveries make the development of detailed understanding and effective measures to mitigate the negative effects of HABs a hopeful outcome in the coming years.
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Affiliation(s)
- Zhiming Yu
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China.
| | - Yingzhong Tang
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Christopher J Gobler
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11790, United States of America
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Mishra S, Stumpf RP, Schaeffer BA, Werdell PJ. Recent changes in cyanobacteria algal bloom magnitude in large lakes across the contiguous United States. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 897:165253. [PMID: 37394074 PMCID: PMC10835736 DOI: 10.1016/j.scitotenv.2023.165253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/25/2023] [Accepted: 06/29/2023] [Indexed: 07/04/2023]
Abstract
Cyanobacterial blooms in inland lakes produce large quantities of biomass that impact drinking water systems, recreation, and tourism and may produce toxins that can adversely affect public health. This study analyzed nine years of satellite-derived bloom records and compared how the bloom magnitude has changed from 2008-2011 to 2016-2020 in 1881 of the largest lakes across the contiguous United States (CONUS). We determined bloom magnitude each year as the spatio-temporal mean cyanobacteria biomass from May to October and in concentrations of chlorophyll-a. We found that bloom magnitude decreased in 465 (25 %) lakes in the 2016-2020 period. Conversely, there was an increase in bloom magnitude in only 81 lakes (4 %). Bloom magnitude either didn't change, or the observed change was in the uncertainty range in the majority of the lakes (n = 1335, 71 %). Above-normal wetness and normal or below-normal maximum temperature over the warm season may have caused the decrease in bloom magnitude in the eastern part of the CONUS in recent years. On the other hand, a hotter and dryer warm season in the western CONUS may have created an environment for increased algal biomass. While more lakes saw a decrease in bloom magnitude, the pattern was not monotonic over the CONUS. The variations in temporal changes in bloom magnitude within and across climatic regions depend on the interactions between land use land cover (LULC) and physical factors such as temperature and precipitation. Despite expectations suggested by recent global studies, bloom magnitude has not increased in larger US lakes over this time period.
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Affiliation(s)
- Sachidananda Mishra
- Consolidated Safety Services Inc., Fairfax, VA 22030, USA; National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, Silver Spring, MD 20910, USA.
| | - Richard P Stumpf
- National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, Silver Spring, MD 20910, USA
| | - Blake A Schaeffer
- U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC 27709, USA
| | - P Jeremy Werdell
- Ocean Ecology Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
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Abdul Manaff AHN, Hii KS, Luo Z, Liu M, Law IK, Teng ST, Akhir MF, Gu H, Leaw CP, Lim PT. Mapping harmful microalgal species by eDNA monitoring: A large-scale survey across the southwestern South China Sea. HARMFUL ALGAE 2023; 129:102515. [PMID: 37951609 DOI: 10.1016/j.hal.2023.102515] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 09/02/2023] [Accepted: 09/23/2023] [Indexed: 11/14/2023]
Abstract
A large-scale sampling was undertaken during a research cruise across the South China Sea in August 2016, covering an area of about 100,000 km2 to investigate the molecular diversity and distributions of micro-eukaryotic protists, with a focus on the potentially harmful microalgal (HAB) species along the east coast of Peninsular Malaysia. Environmental DNAs from 30 stations were extracted and DNA metabarcoding targeting the V4 and V9 markers in the 18S rDNA was performed. Many protistan molecular units, including previously unreported HAB taxa, were discovered for the first time in the water. Our findings also revealed interesting spatial distribution patterns, with a marked signal of compositional turnover between latitudinal regimes of water masses, where dinophytes and diatom compositions were among the most strongly enhanced at the fronts, leading to distinct niches. Our results further confirmed the widespread distribution of HAB species, such as the toxigenic Alexandrium tamiyavaichii and Pseudo-nitzschia species, and the fish-killing Margalefidinium polykrikoides and Karlodinium veneficum. The molecular information obtained from this study provides an updated HAB species inventory and a toolset that could facilitate existing HAB monitoring schemes in the region to better inform management decisions.
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Affiliation(s)
| | - Kieng Soon Hii
- Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya, Bachok, Kelantan, Malaysia
| | - Zhaohe Luo
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Minlu Liu
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Ing Kuo Law
- Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya, Bachok, Kelantan, Malaysia
| | - Sing Tung Teng
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia
| | - Mohd Fadzil Akhir
- Institute of Oceanography and Environment, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
| | - Haifeng Gu
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Chui Pin Leaw
- Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya, Bachok, Kelantan, Malaysia.
| | - Po Teen Lim
- Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya, Bachok, Kelantan, Malaysia.
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Weng Q, Zhang R, Wu P, Chen J, Pan X, Zhao D, Wang J, Zhang H, Qi X, Wu X, Han J, Zhou B. An Occurrence and Exposure Assessment of Paralytic Shellfish Toxins from Shellfish in Zhejiang Province, China. Toxins (Basel) 2023; 15:624. [PMID: 37999487 PMCID: PMC10675454 DOI: 10.3390/toxins15110624] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 11/25/2023] Open
Abstract
The intake of paralytic shellfish toxins (PSTs) may adversely affect human health. Therefore, this study aimed to show the prevalence of PSTs from commercially available shellfish in Zhejiang Province, China, during the period of frequent red tides, investigate the factors affecting the distribution of PSTs, and assess the risk of PST intake following the consumption of bivalve shellfish among the Zhejiang population. A total of 546 shellfish samples were collected, 7.0% of which had detectable PSTs at concentrations below the regulatory limit. Temporal, spatial, and interspecific variations in the occurrence of PSTs were observed in some cases. The dietary exposure to PSTs among the general population of consumers only was low. However, young children in the extreme scenario (the 95th percentile of daily shellfish consumption combined with the maximum PST concentration), defined as 89-194% of the recommended acute reference doses, were possibly at risk of exposure. Notably, Arcidae and mussels were the major sources of exposure to toxins. From the public health perspective, PSTs from commercially available shellfish do not pose a serious health risk; however, more attention should be paid to acute health risks, especially for young children, during periods of frequent red tides.
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Affiliation(s)
- Qin Weng
- School of Public Health, Hangzhou Medical College, Hangzhou 310013, China;
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Ronghua Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Pinggu Wu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Jiang Chen
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Xiaodong Pan
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Dong Zhao
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Jikai Wang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Hexiang Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Xiaojuan Qi
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Xiaoli Wu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
| | - Junde Han
- Department of Epidemiology and Health Statistics, School of Public Health, Faculty of Medicine, Hangzhou Normal University, Hangzhou 311121, China;
| | - Biao Zhou
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China; (R.Z.); (P.W.); (J.C.); (X.P.); (D.Z.); (J.W.); (H.Z.); (X.Q.); (X.W.)
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48
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McQuillan JS, Alrefaey A, Turner AD, Morrell N, Stoner O, Brown R, Kay S, Cooke S, Bage T. Quantitative Polymerase Chain Reaction for the estimation of toxigenic microalgae abundance in shellfish production waters. HARMFUL ALGAE 2023; 128:102497. [PMID: 37714581 DOI: 10.1016/j.hal.2023.102497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/30/2023] [Accepted: 09/01/2023] [Indexed: 09/17/2023]
Abstract
Certain species of marine microalgae produce potent biotoxins that pose a risk to human health if contaminated seafood is consumed, particularly filter feeding bivalve shellfish. In regions where this is likely to occur water and seafood produce are regularly monitored for the presence of harmful algal cells and their associated toxins, but the current approach is flawed by a lengthy delay before results are available to local authorities. Quantitative Polymerase Chain Reaction (qPCR) can be used to measure phytoplankton DNA sequences in a shorter timeframe, however it is not currently used in official testing practices. In this study, samples were collected almost weekly over six months from three sites within a known HAB hotspot, St Austell Bay in Cornwall, England. The abundance of algal cells in water was measured using microscopy and qPCR, and lipophilic toxins were quantified in mussel flesh using LC-MS/MS, focusing on the okadaic acid group. An increase in algal cell abundance occurred alongside an increase in the concentration of okadaic acid group toxins in mussel tissue at all three study sites, during September and October 2021. This event corresponded to an increase in the measured levels of Dinophysis accuminata DNA, measured using qPCR. In the following spring, the qPCR detected an increase in D. accuminata DNA levels in water samples, which was not detected by microscopy. Harmful algal species belonging to Alexandrium spp. and Pseudo-nitzschia spp. were also measured using qPCR, finding a similar increase in abundance in Autumn and Spring. The results are discussed with consideration of the potential merits and limitations of the qPCR technique versus conventional microscopy analysis, and its potential future role in phytoplankton surveillance under the Official Controls Regulations pertaining to shellfish.
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Affiliation(s)
- Jonathan S McQuillan
- Ocean Technology and Engineering, National Oceanography Centre, European Way, Southampton, SO14 3ZH, United Kingdom.
| | - Ahmed Alrefaey
- Ocean Technology and Engineering, National Oceanography Centre, European Way, Southampton, SO14 3ZH, United Kingdom
| | - Andrew D Turner
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset, DT4 8UB, United Kingdom
| | - Nadine Morrell
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset, DT4 8UB, United Kingdom
| | - Oliver Stoner
- School of Mathematics and Statistics, University of Glasgow, Glasgow, G12 8TA, United Kingdom
| | - Ross Brown
- Faculty of Health and Life Sciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter, Devon, EX4 4QD, United Kingdom
| | - Suzanne Kay
- Faculty of Health and Life Sciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter, Devon, EX4 4QD, United Kingdom
| | - Simon Cooke
- Cornwall Port Health Authority (Cornwall Council), The Docks, Falmouth, TR11 4NR, United Kingdom
| | - Timothy Bage
- Cornwall Port Health Authority (Cornwall Council), The Docks, Falmouth, TR11 4NR, United Kingdom
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49
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Erratt KJ, Creed IF, Lobb DA, Smol JP, Trick CG. Climate change amplifies the risk of potentially toxigenic cyanobacteria. GLOBAL CHANGE BIOLOGY 2023; 29:5240-5249. [PMID: 37409538 DOI: 10.1111/gcb.16838] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 05/21/2023] [Indexed: 07/07/2023]
Abstract
Cyanobacterial blooms pose a significant threat to water security, with anthropogenic forcing being implicated as a key driver behind the recent upsurge and global expansion of cyanobacteria in modern times. The potential effects of land-use alterations and climate change can lead to complicated, less-predictable scenarios in cyanobacterial management, especially when forecasting cyanobacterial toxin risks. There is a growing need for further investigations into the specific stressors that stimulate cyanobacterial toxins, as well as resolving the uncertainty surrounding the historical or contemporary nature of cyanobacterial-associated risks. To address this gap, we employed a paleolimnological approach to reconstruct cyanobacterial abundance and microcystin-producing potential in temperate lakes situated along a human impact gradient. We identified breakpoints (i.e., points of abrupt change) in these time series and examined the impact of landscape and climatic properties on their occurrence. Our findings indicate that lakes subject to greater human influence exhibited an earlier onset of cyanobacterial biomass by 40 years compared to less-impacted lakes, with land-use change emerging as the dominant predictor. Moreover, microcystin-producing potential increased in both high- and low-impact lakes around the 1980s, with climate warming being the primary driver. Our findings chronicle the importance of climate change in increasing the risk of toxigenic cyanobacteria in freshwater resources.
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Affiliation(s)
- Kevin J Erratt
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Irena F Creed
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Department of Physical and Environmental Sciences, University of Toronto, Toronto, Ontario, Canada
| | - David A Lobb
- Department of Soil Science, University of Manitoba, Winnipeg, Manitoba, Canada
| | - John P Smol
- Paleoecological Environmental Assessment and Research Lab, Department of Biology, Queen's University, Kingston, Ontario, Canada
| | - Charles G Trick
- Department of Health and Society, University of Toronto, Toronto, Ontario, Canada
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50
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Kong S, Liu X, Jiang H, Hong W, Zhang J, Song W, Yan S. Photobleaching-induced changes in the optical and photochemical properties of algal organic matter. WATER RESEARCH 2023; 243:120395. [PMID: 37549448 DOI: 10.1016/j.watres.2023.120395] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 07/19/2023] [Accepted: 07/20/2023] [Indexed: 08/09/2023]
Abstract
Algal organic matter (AOM), a significant source of endogenous dissolved organic matter (DOM) is released in high concentrations during cyanobacterial blooms, along with cyanotoxins. Subsequent photobleaching of AOM is an important phenomenon to investigate. In this study, intracellular organic matter (IOM) and extracellular organic matter (EOM) were extracted from cultured cyanobacteria taken from Taihu Lake in China. The formation of photochemically produced reactive intermediates in different stages of IOM and EOM photobleaching was compared to Suwannee River DOM (SRDOM, reference standard DOM). Results revealed notable differences influenced by the pigment component among IOM, EOM, and SRDOM. The pigment in IOM contributed to a triplet state pool with strong energy-transfer but limited electron-transfer capabilities. Notably, IOM exhibited the highest triplets state quantum yield value in the visible region, suggesting its potential significance in pollutant degradation in deeper water layers. For EOM, one of the pools exhibits photolability and remarkable electron-transfer capability, indicating it as a high-energy triplet state component. Moreover, three cyanotoxins (MC-LR, ACA, and ATX-a) were detected in the extracted AOM, and their photodegradation was monitored during the AOM photobleaching process. This highlights the potential role of AOM as a photosensitizer in the natural self-cleaning mechanisms of water bodies, facilitating the degradation of organic pollutants through photochemical reactions. The findings of this study contribute to understanding the dynamic nature of AOM and its implications in environmental processes.
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Affiliation(s)
- Shengquan Kong
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Xiaojing Liu
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Hongyu Jiang
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Wenjie Hong
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Jibiao Zhang
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Weihua Song
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Shuwen Yan
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China.
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