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Sun QW, Gao Y, Wang J, Fu FX, Yong CW, Li SQ, Huang HL, Chen WZ, Wang XW, Jiang HB. Molecular mechanism of a coastal cyanobacterium Synechococcus sp. PCC 7002 adapting to changing phosphate concentrations. MARINE LIFE SCIENCE & TECHNOLOGY 2024; 6:562-575. [PMID: 39219678 PMCID: PMC11358556 DOI: 10.1007/s42995-024-00244-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 06/23/2024] [Indexed: 09/04/2024]
Abstract
Phosphorus concentration on the surface of seawater varies greatly with different environments, especially in coastal. The molecular mechanism by which cyanobacteria adapt to fluctuating phosphorus bioavailability is still unclear. In this study, transcriptomes and gene knockouts were used to investigate the adaptive molecular mechanism of a model coastal cyanobacterium Synechococcus sp. PCC 7002 during periods of phosphorus starvation and phosphorus recovery (adding sufficient phosphorus after phosphorus starvation). The findings indicated that phosphorus deficiency affected the photosynthesis, ribosome synthesis, and bacterial motility pathways, which recommenced after phosphorus was resupplied. Even more, most of the metabolic pathways of cyanobacteria were enhanced after phosphorus recovery compared to the control which was kept in continuous phosphorus replete conditions. Based on transcriptome, 54 genes potentially related to phosphorus-deficiency adaptation were selected and knocked out individually or in combination. It was found that five mutants showed weak growth phenotype under phosphorus deficiency, indicating the importance of the genes (A0076, A0549-50, A1094, A1320, A1895) in the adaptation of phosphorus deficiency. Three mutants were found to grow better than the wild type under phosphorus deficiency, suggesting that the products of these genes (A0079, A0340, A2284-86) might influence the adaptation to phosphorus deficiency. Bioinformatics analysis revealed that cyanobacteria exposed to highly fluctuating phosphorus concentrations have more sophisticated phosphorus acquisition strategies. These results elucidated that Synechococcus sp. PCC 7002 have variable phosphorus response mechanisms to adapt to fluctuating phosphorus concentration, providing a novel perspective of how cyanobacteria may respond to the complex and dynamic environments. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-024-00244-y.
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Affiliation(s)
- Qiao-Wei Sun
- School of Marine Sciences, Ningbo University, Ningbo, 315211 China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519080 China
| | - Yu Gao
- School of Life Sciences, Central China Normal University, Wuhan, 430079 China
| | - Jordan Wang
- Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089 USA
| | - Fei-xue Fu
- Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089 USA
| | - Cheng-Wen Yong
- School of Marine Sciences, Ningbo University, Ningbo, 315211 China
| | - Shuang-Qing Li
- School of Marine Sciences, Ningbo University, Ningbo, 315211 China
| | - Hai-Long Huang
- School of Marine Sciences, Ningbo University, Ningbo, 315211 China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519080 China
| | - Wei-Zhong Chen
- School of Marine Sciences, Ningbo University, Ningbo, 315211 China
| | - Xin-Wei Wang
- School of Marine Sciences, Ningbo University, Ningbo, 315211 China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519080 China
| | - Hai-Bo Jiang
- School of Marine Sciences, Ningbo University, Ningbo, 315211 China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519080 China
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Truchet DM, Noceti BM, Villagran DM, Truchet RM. Alternative Conservation Paradigms and Ecological Knowledge of Small-Scale Artisanal Fishers in a Changing Marine Scenario in Argentina. HUMAN ECOLOGY: AN INTERDISCIPLINARY JOURNAL 2022; 50:209-225. [PMID: 35194293 PMCID: PMC8852966 DOI: 10.1007/s10745-022-00309-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
We studied conservation paradigms of small-scale artisanal fishers and other actors involved in the conservation of the Bahía Blanca Estuary (BBE)-a Southwestern Atlantic estuary under anthropogenic pressures (conservationists, NGOs, individuals in the private sector and the port consortium). We focused on the relationship between fishers and non-human entities (e.g., animals, tides, lunar cycles, etc.) from alternative conservation paradigms according to Pálsson's schema (orientalism, paternalism, communalism). We also explored the ecological knowledge of fisher communities to identify possible conservation strategies. Using an ethnographic approach, we identified communalism as the dominant paradigm within the fisher communities as opposed to the paternalistic and orientalist approaches of conservationists and industry employees in the BBE. Fishers demonstrated a broad knowledge on the effects of climate change on fish stocks and pollution on ocean environments and biota, which gillnets avoid catching juveniles and threatened species, and landscape changes over the long-term period, among others areas that could be useful for conservation of these changing coastal ecosystems. We conclude that understanding local perspectives and practices is essential for a democratic exchange among different bodies of knowledge to conserve marine ecosystems.
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Affiliation(s)
- Daniela M. Truchet
- Área de Oceanografía Química, Instituto Argentino de Oceanografía (IADO), CCT-CONICET, Universidad Nacional del Sur (UNS), Camino La Carrindanga, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - Belén M. Noceti
- Instituto de Investigaciones Económicas y Sociales del Sur (IIESS), Universidad Nacional del Sur (UNS) – CONICET Bahía Blanca, San Andrés 800, Altos de Palihue, Campus Universitario, C.C 8000 Bahía Blanca, Argentina
- Departamento de Economía, Universidad Nacional del Sur (UNS), San Andrés 800, Altos de Palihue, Campus Universitario, C.C 8000 Bahía Blanca, Argentina
| | - Diana M. Villagran
- Instituto de Investigaciones Marinas y Costeras (IIMyC-CONICET) Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMdP), Funes 3350, C.C 7600 Mar del Plata, Argentina
| | - Rocío M. Truchet
- Instituto de Humanidades y Ciencias Sociales del Litoral (IHuCSO-Litoral, CONICET), Universidad Nacional del Litoral (UNL), Sede FCJS: Cándido Pujato 2751, Ciudad de Santa Fe, Provincia de Santa Fe, C.C 3000 Santa Fe, Argentina
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Truchet DM, Buzzi NS, Negrin VL, Botté SE, Marcovecchio JE. First long-term assessment of metals and associated ecological risk in subtidal sediments of a human-impacted SW Atlantic estuary. MARINE POLLUTION BULLETIN 2022; 174:113235. [PMID: 34896754 DOI: 10.1016/j.marpolbul.2021.113235] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 11/29/2021] [Accepted: 12/02/2021] [Indexed: 06/14/2023]
Abstract
The main objective of this article was to profile the metal accumulation, sources, pollution levels and trends during 6 years in a SW Atlantic coastal system (Bahía Blanca estuary). Subtidal sediment samples were taken from six stations with different human impacts, and chemical element analyses were performed using ICP-OES. As a result, metals tended to increase in time and differences were observed between a site profoundly impacted by sewage waters and the rest of the sampling stations. Values range from background levels to those considered toxic for the marine biota, as in the case of Cd and Cu. Besides, the geochemical analyses exhibited low to moderate pollution with probable adverse biological effects. Finally, the physicochemical parameters of the water column like pH and DO significantly decreased in time in all stations and temperature correlated with some metals, indicating a potential interaction.
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Affiliation(s)
- D M Truchet
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina.
| | - N S Buzzi
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - V L Negrin
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - S E Botté
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - J E Marcovecchio
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Universidad Tecnológica Nacional (UTN-FRBB), 11 de abril 461, B8000LMI Bahía Blanca, Buenos Aires, Argentina; Universidad FASTA, Gascón 3145, B7600FNK Mar del Plata, Buenos Aires, Argentina
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Wu Y, Guo P, Su H, Zhang Y, Deng J, Wang M, Sun Y, Li Y, Zhang X. Seasonal and spatial variations in the phytoplankton community and their correlation with environmental factors in the Jinjiang River Estuary in Quanzhou, China. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 194:44. [PMID: 34957530 DOI: 10.1007/s10661-021-09697-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
The seasonal and spatial variation in the phytoplankton community structure and the environmental variables were investigated in December (the dry season) 2016 and July (the rainy season) 2017 in the Jinjiang River Estuary, China. We identified a total of 138 species of phytoplankton, which were mainly Chlorophyta, Bacillariophyta, and Cryptophyta in the dry season; however, in the rainy season, only Bacillariophyta were found. In the Jinjiang River Estuary, the species evenness and the biodiversity index were higher in the rainy season and that the species diversity was higher in the dry season. Redundancy analysis (RDA) revealed that the dominant species were statistically related to many of the environmental variables, including the water temperature (WT), pH, salinity (Sal), dissolved oxygen (DO), total phosphorus (TP), and total nitrogen (TN). Among the variables, the Sal, DO, TP, and TN had a significant influence on the dominant species distribution, and the WT and pH also affected the dominant species distribution to some extent.
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Affiliation(s)
- Yanmei Wu
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environmental and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Peiyong Guo
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China.
- Institute of Environmental and Resources Technology, Huaqiao University, Xiamen, 361021, China.
| | - Haitao Su
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environmental and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Yuxuan Zhang
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environmental and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Jun Deng
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environmental and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Meixian Wang
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environmental and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Yinshi Sun
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environmental and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Yanqi Li
- Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, Fujian, China
- Institute of Environmental and Resources Technology, Huaqiao University, Xiamen, 361021, China
| | - Xiaoyan Zhang
- Nanjing Institute of Environmental Science, Ministry of Environmental Protection of the People's Republic of China, Nanjing, 210042, China
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Zonation of protistan plankton in a productive area of the Patagonian shelf: Potential implications for the anchovy distribution. FOOD WEBS 2021. [DOI: 10.1016/j.fooweb.2021.e00211] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Forero-López AD, Rimondino GN, Truchet DM, Colombo CV, Buzzi NS, Malanca FE, Spetter CV, Fernández-Severini MD. Occurrence, distribution, and characterization of suspended microplastics in a highly impacted estuarine wetland in Argentina. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 785:147141. [PMID: 33933772 DOI: 10.1016/j.scitotenv.2021.147141] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/29/2021] [Accepted: 04/10/2021] [Indexed: 05/05/2023]
Abstract
Microplastics have been a global concern due to their potential and widespread risks to organisms and environments. In this study, we investigated the abundance, distribution, and characteristics of microplastics (MPs) in the surface waters of the Bahía Blanca Estuary (BBE), specifically in its inner and middle zone. The results showed the dominant shape of MPs were fibers, being black, transparent, and blue the main colors. The concentrations of MPs ranged from 182 to 33,373 items m-3 with a mean value of 6162 items m-3. The highest concentrations of MPs were detected in the middle zone of the estuary, a site that receives untreated sewage effluents from the city. The most abundant size ranges were from 0.5 to 1.5 mm (44.21%) and ˂0.5 mm (40.21%) and were predominant at all the sampling sites. The concentration of mesoplastics in the inner zone (16 items m-3) presented larger values than in the middle zone (5 items m-3). A wide variety of polymeric materials with predominance of microfibers such as cellulose-based, polyacrylonitrile, polyethylene terephthalate, and polypropylene were identified. Polyester/alkyd resins and poli(vinyl chloride) were also found. The analysis of MPs surface through SEM/EDX detected a variety of elements such as C, O, Si, Al, K, Ca, Cl, Ti, Fe, S, and P, indicating potential contaminant carriers in the water column. Some plastic particles presented a high degree of degradation on their surface morphology. Untreated sewage discharges appear to be a significant input of MPs. Therefore, the results provided in the present study should be considered by stakeholders interested in the management and conservation of this large coastal wetland with significant ecological and economic value.
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Affiliation(s)
- A D Forero-López
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina.
| | - G N Rimondino
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Fisicoquímica, Facultad de Ciencias Químicas. Universidad Nacional de Córdoba, Ciudad Universitaria (X5000HUA), Córdoba, Argentina
| | - D M Truchet
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - C V Colombo
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina
| | - N S Buzzi
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - F E Malanca
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Fisicoquímica, Facultad de Ciencias Químicas. Universidad Nacional de Córdoba, Ciudad Universitaria (X5000HUA), Córdoba, Argentina
| | - C V Spetter
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Química, Universidad Nacional del Sur (UNS), Avenida Alem 1253, B8000CPB Bahía Blanca, Buenos Aires, Argentina
| | - M D Fernández-Severini
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina.
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Garzón-Cardona JE, Guinder VA, Alonso C, Martínez AM, Pantoja-Gutiérrez S, Kopprio GA, Krock B, Lara RJ. Chemically unidentified dissolved organic carbon: A pivotal piece for microbial activity in a productive area of the Northern Patagonian shelf. MARINE ENVIRONMENTAL RESEARCH 2021; 167:105286. [PMID: 33677173 DOI: 10.1016/j.marenvres.2021.105286] [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: 09/30/2020] [Revised: 02/16/2021] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
The biochemical composition and fluorescence properties of DOM were assessed in relation to phytoplankton and major aquatic bacterial clades in a regenerative area of the Argentine Shelf. DOM was mainly of autochthonous biological origin, containing humic- and protein-like substances of medium degree of unsaturation and diagenesis. Biochemical-DOM accounted for 25% of total DOC, being dissolved combined amino acids (DCAA) the dominant fraction followed by free carbohydrates. Phytoplankton was the main source of serine, alanine, and valine, and particulate carbohydrates. Gammaproteobacteria abundance correlated negatively with ammonium and positively with DCAA, suggesting a coupling between ammonium consumption and refractory amino acid production. A preferential utilization of alanine, leucine and threonine as nitrogen source was inferred from the distribution of Cytophaga-Flavobacteria-Bacteroidete in relation with dissolved free amino acids (DFAA). Notably, Alpha- and Betaproteobacteria correlated with the large pool (75%) of chemically unidentified DOC and not with DCAA or dissolved combined carbohydrates. Particularly, Alphaproteobacteria (∼40% of EUB total heterotrophic bacteria) either significantly contribute to the production of the "humic", refractory fraction of marine DOM, or the latter impairs resource control on their abundance. Spatial heterogeneity inherent to coastal-shelf areas drives important regional variability in the biochemical properties of DOM.
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Affiliation(s)
- John E Garzón-Cardona
- Instituto Argentino de Oceanografía (IADO, CONICET-UNS), Bahía Blanca, Argentina; Department of Chemistry, Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina.
| | - Valeria A Guinder
- Instituto Argentino de Oceanografía (IADO, CONICET-UNS), Bahía Blanca, Argentina
| | - Cecilia Alonso
- Functional Ecology of Aquatic Systems, Centro Universitario Región Este, Universidad de la República, Rocha, Uruguay
| | - Ana M Martínez
- Department of Chemistry, Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina; Instituto de Química del Sur (INQUISUR) UNS-CONICET, Bahía Blanca, Argentina
| | - Silvio Pantoja-Gutiérrez
- Departamento de Oceanografía and Centro de Investigacíon Oceanografíca COPAS Sur-Australñ (PIA-ANID), Universidad de Concepción, Concepción, Chile
| | - Germán A Kopprio
- Chemical Analytics and Biogeochemistry, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - Bernd Krock
- Alfred Wegener Institut-Helmholtz Zentrum für Polar- und Meeresforschung, Chemische Ökologie, Bremerhaven, Germany
| | - Rubén J Lara
- Instituto Argentino de Oceanografía (IADO, CONICET-UNS), Bahía Blanca, Argentina
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Forero López AD, Villagran DM, Fernandez EM, Spetter CV, Buzzi NS, Fernández Severini MD. Chromium behavior in a highly urbanized coastal area (Bahía Blanca Estuary, Argentina). MARINE POLLUTION BULLETIN 2021; 165:112093. [PMID: 33611229 DOI: 10.1016/j.marpolbul.2021.112093] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 01/20/2021] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
The contamination of estuaries by heavy metals from anthropogenic activities in the industrial, domestic, and agricultural sectors is a global concern. In this study, the Cr, Fe, and Mn levels in the suspended particulate matter (SPM) were analyzed in estuarine waters from Bahia Blanca Estuary, during 2014-2015. The values of particulate Cr ranged from 7.33 to 35.20 μg g-1, which could be associated to several anthropogenic sources. The positive correlations found between Cr and Chlorophyll-a, and Cr and particulate organic carbon (POC) suggest the strong influence of phytoplankton on the adsorption of this metal and on the increase of particulate Cr. Negative correlations were found between Cr and DO and between Cr and pH, which could indicate an increasing trend in the dissolved form of Cr. This study suggests that the physical-chemical characteristics of the water column as well as phytoplankton and POC dynamics influence the behavior of Cr in this estuary.
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Affiliation(s)
- A D Forero López
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina.
| | - D M Villagran
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina
| | - E M Fernandez
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Química, Universidad Nacional del Sur (UNS), Avenida Alem 1253, B8000CPB Bahía Blanca, Buenos Aires, Argentina
| | - C V Spetter
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Química, Universidad Nacional del Sur (UNS), Avenida Alem 1253, B8000CPB Bahía Blanca, Buenos Aires, Argentina
| | - N S Buzzi
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - M D Fernández Severini
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina.
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9
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Truchet DM, Buzzi NS, Negro CL, Mora MC, Marcovecchio JE. Integrative assessment of the ecological risk of heavy metals in a South American estuary under human pressures. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111498. [PMID: 33091768 DOI: 10.1016/j.ecoenv.2020.111498] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/09/2020] [Accepted: 10/10/2020] [Indexed: 05/12/2023]
Abstract
Biomonitoring of heavy metal pollution through the use of biomarkers could be a difficult task since the organisms' physiological changes could shift regarding natural factors (i.e., the season of the year) and due to the anthropogenic pressures of the environment. In the Southwest Atlantic Ocean, where most industrial and developing countries are settled, it is essential to address these concerns to generate information for the stakeholders and monitoring programs that aim to use biochemical biomarkers as early warning signals to detect heavy metal pollution. The present study intended to determinate the heavy metal concentrations in sediments and the hepatopancreas of the crab species Neohelice granulata as well as the ecological risk through the use of biomarkers and geochemical indices in sites with different anthropogenic pressures of the Bahía Blanca estuary (SW Atlantic Ocean) during the warm and cold season. The results showed low to moderate heavy metal pollution in the sediments by Cu with possible effects on the biota in a site with sewage waters' discharges. Except for GST that was explained by Cd, the biomarkers employed were not useful to assess spatial heavy metal pollution, and they might be ruled out by physiological seasonal variations rather than anthropogenic constraints, or another type of pollutants in the area.
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Affiliation(s)
- Daniela M Truchet
- Área de Oceanografía Química. Instituto Argentino de Oceanografía (IADO), CCT, CONICET, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB, Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN, Bahía Blanca, Buenos Aires, Argentina
| | - Natalia S Buzzi
- Área de Oceanografía Química. Instituto Argentino de Oceanografía (IADO), CCT, CONICET, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB, Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN, Bahía Blanca, Buenos Aires, Argentina
| | - C Leandro Negro
- Instituto Nacional de Limnología (INALI, CONICET-UNL), Paraje el Pozo s/n, CP 3000, Ciudad de Santa Fe, Santa Fe, Argentina; Escuela Superior de Sanidad, Facultad de Ciencias Biológicas y Bioquímicas, Universidad Nacional del Litoral (ESS, FCBC-UNL), Paraje el Pozo s/n, CP 3000, Ciudad de Santa Fe, Santa Fe, Argentina
| | - M Celeste Mora
- Instituto Nacional de Limnología (INALI, CONICET-UNL), Paraje el Pozo s/n, CP 3000, Ciudad de Santa Fe, Santa Fe, Argentina
| | - Jorge E Marcovecchio
- Área de Oceanografía Química. Instituto Argentino de Oceanografía (IADO), CCT, CONICET, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB, Bahía Blanca, Buenos Aires, Argentina; Universidad Tecnológica Nacional (UTN, FRBB), 11 de abril 461, B8000LMI, Bahía Blanca, Buenos Aires, Argentina; Universidad FASTA, Gascón 3145, B7600FNK, Mar del Plata, Buenos Aires, Argentina
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10
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Wang R, Wu J, Yiu KF, Shen P, Lam PKS. Long-term variation in phytoplankton assemblages during urbanization: A comparative case study of Deep Bay and Mirs Bay, Hong Kong, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 745:140993. [PMID: 32758740 DOI: 10.1016/j.scitotenv.2020.140993] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 07/13/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
A long-term dataset, including physicochemical, nutrient, and phytoplankton assemblages from 1994 to 2016, was analyzed to investigate the response of the algal community to variations in environmental factors in Deep Bay and Mirs Bay in southern China. These bays differ in their overall nutrient loadings, as well as in physical factors. The results showed that diatoms were numerically dominant in Mirs Bay, while other minor phytoplankton groups, including eutrophication-tolerant species, constituted the majority in Deep Bay. Phytoplankton community composition tended to be less complex in Deep Bay, suggesting a stressed, unstable and unbalanced ecosystem compared to that in Mirs Bay. Algal blooms occurred more frequently in Mirs Bay, whereas fewer but larger-scale blooms occurred in Deep Bay. Statistically, the combination of all explanatory variables accounted for approximately 55% of the variation in Chlorophyll-a (Chl-a) concentration and less than 20% of the total phytoplankton variation over the 23-year period in the two bays. The high level of nutrients caused by urbanization was not the driving force in the formation of blooms but presumably provided a nutrient base that resulted in blooms with longer durations and covering larger areas.
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Affiliation(s)
- Rui Wang
- Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Jiajun Wu
- Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China; The State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong SAR 999077, China.
| | - King-Fung Yiu
- The State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong SAR 999077, China
| | - Pingping Shen
- Ocean School, Yantai University, Yantai 264005, China.
| | - Paul K S Lam
- Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China; The State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong SAR 999077, China; Department of Chemistry, City University of Hong Kong, Hong Kong SAR 999077, China
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11
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Implications of Nutrient Enrichment and Related Environmental Impacts in the Pearl River Estuary, China: Characterizing the Seasonal Influence of Riverine Input. WATER 2020. [DOI: 10.3390/w12113245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The Pearl River estuary is an ecologically dynamic region located in southern China that experiences strong gradients in its biogeochemical properties. This study examined the seasonality of nutrient dynamics, identified related environmental responses, and evaluated how river discharge regulated nutrient sink and source. The field investigation showed significant differences of dissolved nutrients with seasons and three zones of the estuary regarding the estuarine characteristics. Spatially, nutrients exhibited a clear decreasing trend along the salinity gradient; temporally, their levels were obviously higher in summer than other seasons. The aquatic environment was overall eutrophic, as a result of increased fluxes of nitrogen and silicate. This estuary was thus highly sensitive to nutrient enrichment and related pollution of eutrophication. River discharge, oceanic current, and atmospheric deposition distinctly influenced the nutrient status. These factors accordingly may influence phytoplankton that are of importance in coastal ecosystems. Phytoplankton (in terms of chlorophyll) was potentially phosphate limited, which then more frequently resulted in nutrient pollution and blooms. Additionally, the nutrient sources were implied according to the cause–effect chains between nutrients, hydrology, and chlorophyll, identified by the PCA-generated quantification. Nitrogen was constrained by marine-riverine waters and their mutual increase-decline trend, and a new source was supplemented along the transport from river to sea, while a different source of terrestrial emission from coastal cities contributed to phosphate greatly.
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12
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Wang R, Liu X, Wu J, Wai TC, Shen P, Lam PKS. Long-term variations of phytoplankton community in relations to environmental factors in Deep Bay, China, from 1994 to 2016. MARINE POLLUTION BULLETIN 2020; 153:111010. [PMID: 32275556 DOI: 10.1016/j.marpolbul.2020.111010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 02/11/2020] [Accepted: 02/19/2020] [Indexed: 06/11/2023]
Abstract
Long-term effects of environmental factors on phytoplankton community in Deep Bay, Hong Kong, were investigated from 1994 to 2016. Phytoplankton community experienced three important shifts: small flagellates and Chroomonas spp. dominated from 1994 to 2006. Heavy blooms of diatoms Skeletonema costatum and Thalassiosira spp. occurred and became the dominant species between 2007 and 2009. Phytoplankton community was dominated by small flagellates and Chroomonas spp. from 2010 to 2015, and their abundance was much higher than earlier periods. Abundance of Chroomonas spp. decreased sharply in 2016, and Thalassiosira spp. became the dominant species. Phytoplankton community changed from consisting mainly of small flagellates and Chroomonas spp. to more diatoms, changing from ~90% to ~45% for other species abundance and from <10% to ~55% for diatoms. Nitrite, 5-day biochemical oxygen demand, salinity, suspended solids and turbidity were more influential on phytoplankton variation (23.65% explained by all the variables).
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Affiliation(s)
- Rui Wang
- Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Xiaowan Liu
- Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Jiajun Wu
- Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China; The State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong SAR 999077, China
| | - Tak-Cheung Wai
- The State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong SAR 999077, China
| | - Pingping Shen
- Ocean School, Yantai University, Yantai 264005, China.
| | - Paul K S Lam
- Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China; The State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong SAR 999077, China.
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13
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Truchet DM, Noceti MB, Villagrán DM, Orazi MM, Medrano MC, Buzzi NS. Fishers' Ecological Knowledge about Marine Pollution: What Can FEK Contribute to Ecological and Conservation Studies of a Southwestern Atlantic Estuary? J ETHNOBIOL 2019. [DOI: 10.2993/0278-0771-39.4.584] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Daniela M. Truchet
- 1 Área de Oceanografía Química, Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS) – CONICET Bahía Blanca, Camino La Carrindanga km 7, Edificio E1, C.C 804, 8000 Bahía Blanca, Argentina
| | - M. Belén Noceti
- Instituto de Investigaciones Económicas y Sociales del Sur (IIESS), Universidad Nacional del Sur (UNS) – CONICET, Bahía Blanca, Argentina
| | - Diana M. Villagrán
- 1 Área de Oceanografía Química, Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS) – CONICET Bahía Blanca, Camino La Carrindanga km 7, Edificio E1, C.C 804, 8000 Bahía Blanca, Argentina
| | - Melina M. Orazi
- 1 Área de Oceanografía Química, Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS) – CONICET Bahía Blanca, Camino La Carrindanga km 7, Edificio E1, C.C 804, 8000 Bahía Blanca, Argentina
| | - M. Celeste Medrano
- Instituto de Ciencias Antropológicas, Sección de Etnología y Etnografía. Facultad de Filosofía y Letras, Universidad de Buenos Aires (FFyL-UBA) – CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Natalia S. Buzzi
- 1 Área de Oceanografía Química, Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS) – CONICET Bahía Blanca, Camino La Carrindanga km 7, Edificio E1, C.C 804, 8000 Bahía Blanca, Argentina
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14
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Lemley DA, Adams JB, Rishworth GM, Bouland C. Phytoplankton responses to adaptive management interventions in eutrophic urban estuaries. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 693:133601. [PMID: 31374499 DOI: 10.1016/j.scitotenv.2019.133601] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 07/19/2019] [Accepted: 07/24/2019] [Indexed: 06/10/2023]
Abstract
Upstream anthropogenic perturbations can dramatically affect estuarine water quality, especially in small systems where water retention times are high. Management of these modified ecosystems often requires direct interventions to prevent detrimental long-term effects. The heavily urbanized and temporarily closed Zandvlei Estuary in South Africa has a long history of anthropogenic manipulation, and therefore acts as an ideal case-study to gauge reactive management practices. Continued deterioration of estuarine water quality and ecological functioning prompted the adoption of an adaptive management approach. Subsequent management interventions to increase salinity variability and nutrient removal included the (1) adoption of a mouth management plan, (2) regular harvesting of submerged vegetation, and (3) removal of flow obstructions. Physico-chemical and nutrient monitoring data (2010-2018) were assessed to document the response of phytoplankton to these interventions. Time-series analysis indicated an upward trend in salinity throughout the estuary. This corresponded with a temporal decline in phytoplankton biomass levels and was supported by model results that highlighted a strongly inverse relationship with salinity. The frequency of high-biomass events (>80 μg Chl-a l-1) also declined in each of the designated estuarine zones. In April 2012, an extensive harmful algal bloom (HAB) of Prymnesium parvum (Prymnesiophyceae) was recorded (~530 μg Chl-a l-1) in the estuary, culminating in hypoxic conditions (O2 < 2 mg l-1) and fish kills. However, the subsequent mechanical breaching of the mouth has prevented reoccurrences of P. parvum. Similarly, more saline conditions arising from increased marine connectivity reduced the abundance of the previously dominant Bacillariophyceae and Chlorophyceae classes. The overall improvement in water quality validates the efficacy of management interventions aimed at restoring and conserving ecosystem functionality. Yet, these efforts are a deviation from natural estuarine functioning and thus a 'catchment to coast' approach that incorporates upstream nutrient mitigation measures is needed to achieve sustainable long-term management objectives.
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Affiliation(s)
- Daniel A Lemley
- Botany Department, Nelson Mandela University, Port Elizabeth 6031, South Africa; DST/NRF Research Chair in Shallow Water Ecosystems, Institute for Coastal and Marine Research, Nelson Mandela University, Port Elizabeth 6031, South Africa.
| | - Janine B Adams
- Botany Department, Nelson Mandela University, Port Elizabeth 6031, South Africa; DST/NRF Research Chair in Shallow Water Ecosystems, Institute for Coastal and Marine Research, Nelson Mandela University, Port Elizabeth 6031, South Africa
| | - Gavin M Rishworth
- DST/NRF Research Chair in Shallow Water Ecosystems, Institute for Coastal and Marine Research, Nelson Mandela University, Port Elizabeth 6031, South Africa; Zoology Department, Nelson Mandela University, Port Elizabeth 6031, South Africa
| | - Candice Bouland
- Catchment, Stormwater and River Management, Water and Sanitation Department, City of Cape Town, Cape Town 8001, South Africa
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15
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Gusha MNC, Dalu T, Wasserman RJ, McQuaid CD. Zooplankton grazing pressure is insufficient for primary producer control under elevated warming and nutrient levels. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 651:410-418. [PMID: 30240923 DOI: 10.1016/j.scitotenv.2018.09.132] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 09/09/2018] [Accepted: 09/10/2018] [Indexed: 06/08/2023]
Abstract
Within a given ecosystem, species persistence is driven by responses to the effects of biotic and abiotic stressors. Ongoing climatic shifts and increased pollution pressure have created the need to assess potential effects and interactions of physical and biotic factors on coastal ecosystem processes to project ecosystem resilience and persistence. In coastal marine environments, primary production dynamics are driven by the interaction between bottom-up abiotic effects and biotic effects induced by top-down trophic control. Given the many environmental and climatic changes observed throughout coastal regions, we assessed the effects of interactions among temperature, nutrients and grazing in a laboratory-based microcosm experiment. We did this by comparing chlorophyll-a (chl-a) concentrations at two temperatures in combination with four nutrient regimes. To test for subsequent cascading effects on higher trophic levels, we also measured grazing and growth rates of the calanoid copepod Pseudodiaptomus hessei. We observed different phytoplankton and zooplankton responses to temperature (17 °C, 24 °C) and nutrients (nitrogen only (N), phosphates only (P), nitrogen and phosphates combined (NP), no nutrient additions (C)). Contributions of predictors to model fit in the boosted regression trees model were phosphates (42.7%), copepods (23.8%), nitrates (17.5%) and temperature (15.9%), suggesting phosphates were an important driver for the high chl-a concentrations observed. There was an increase in total phytoplankton biomass across both temperatures, while nutrient addition affected the phytoplankton size structure prior to grazing irrespective of temperature. Phytoplankton biomass was highest in the NP treatment followed by the N treatment. However, the phytoplankton size structure differed between temperatures, with microphytoplankton being dominant at 24 °C, while nanophytoplankton dominated at 17 °C. The P and C treatments exhibited the lowest phytoplankton biomass. Copepod abundances and growth rates were higher at 17 °C than at 24 °C. This study highlights that bottom-up positive effects in one trophic level do not always positively cascade into another trophic level. It was, however, evident that temperature was a limiting factor for plankton abundance, productivity and size structure only when nutrients were limiting, with top-down pressure exhibiting minimal effects on the phytoplankton.
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Affiliation(s)
- Molline N C Gusha
- Department of Zoology and Entomology, Rhodes University, Grahamstown 6140, South Africa.
| | - Tatenda Dalu
- Department of Ecology and Resource Management, University of Venda, Thohoyandou 0950, South Africa.
| | - Ryan J Wasserman
- Department of Biological Sciences and Biotechnology, Botswana International University of Science and Technology, Palapye, Botswana
| | - Christopher D McQuaid
- Department of Zoology and Entomology, Rhodes University, Grahamstown 6140, South Africa
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16
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Quintas PY, Fernández EM, Spetter CV, Arias AH, Garrido M, Marcovecchio JE. Preliminary studies about the role of physicochemical parameters on the organotin compound dynamic in a South American estuary (Bahía Blanca, Argentina). ENVIRONMENTAL MONITORING AND ASSESSMENT 2019; 191:127. [PMID: 30721360 DOI: 10.1007/s10661-019-7260-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 01/23/2019] [Indexed: 06/09/2023]
Abstract
This work provides a preliminary study of the destination, mobility, and availability of tributyltin (TBT), dibutyltin (DBT), and monobutyltin (MBT) in contaminated sediments and water column within Puerto Rosales Port, located in the middle zone of the Bahía Blanca Estuary (Argentina). Therefore, this study presents the first comprehensive results of the role of several physicochemical parameters (temperature, pH, Eh, salinity, turbidity, organic matter, chlorophyll, and macronutrients) in behavior of organotin compounds (OTCs) in a marine-coastal ecosystem. The samples were collected seasonally in May, August, and November during 2014. Levels of OTCs were determined in sediments and water column samples by means of gas chromatography-mass spectrometry analysis. Degradation index analyses suggested not recent inputs of TBT at the area of study. However, results submitted a continuous input of TBT into the column water; further, its distribution and degradation pattern were shown to be influenced by salinity, turbidity, particulate organic matter, chlorophyll, and nitrates. These last two parameters, chlorophyll and nitrates, also were very important for sediment samples. Chlorophyll together with high temperatures recorded in the surface sediments triggers biodegradation process of TBT and DBT resulting in high MBT levels while nitrates seemed to promote debutylation process. Furthermore, pH appeared to influence drastically the adsorption/desorption activity of TBT and DBT in sediment. Finally, the Eh obtained suggested a degradation of TBT thanks to the presence of Fe (III) in this compartment. In addition, in fact, the results outlined a possible MBT additional input that contributes to the pollution observed in the study area. Graphical abstract Organotin compounds behavior according to several physicochemical parameters.
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Affiliation(s)
- Pamela Y Quintas
- Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.
- Laboratorio de Química Analítica para Investigación y Desarrollo (QUIANID), Instituto Interdisciplinario de Ciencias Básicas (ICB), UNCUYO - CONICET, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, J. Contreras 1300, (5500), Mendoza, Argentina.
| | - Eleonora M Fernández
- Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
- Departamento de Química, Universidad Nacional del Sur (UNS), Bahia Blanca, Argentina
| | - Carla V Spetter
- Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
- Departamento de Química, Universidad Nacional del Sur (UNS), Bahia Blanca, Argentina
| | - Andrés H Arias
- Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
- Departamento de Química, Universidad Nacional del Sur (UNS), Bahia Blanca, Argentina
| | - Mariano Garrido
- Departamento de Química, Universidad Nacional del Sur (UNS), Bahia Blanca, Argentina
- Instituto de Química del Sur (INQUISUR), Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Jorge E Marcovecchio
- Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
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17
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López-Abbate MC, Molinero JC, Perillo GME, Barría de Cao MS, Pettigrosso RE, Guinder VA, Uibrig R, Berasategui AA, Vitale A, Marcovecchio JE, Hoffmeyer MS. Long-term changes on estuarine ciliates linked with modifications on wind patterns and water turbidity. MARINE ENVIRONMENTAL RESEARCH 2019; 144:46-55. [PMID: 30554905 DOI: 10.1016/j.marenvres.2018.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/05/2018] [Accepted: 12/06/2018] [Indexed: 06/09/2023]
Abstract
Planktonic ciliates constitute a fundamental component among microzooplankton and play a prominent role in carbon transport at the base of marine food webs. How these organisms respond to shifting environmental regimes is unclear and constitutes a current challenge under global ocean changes. Here we examine a multiannual field survey covering 25 years in the Bahía Blanca Estuary (Argentina), a shallow, flood-plain system dominated by wind and tidal energy. We found that the estuary experienced marked changes in wind dominant regimes and an increase in water turbidity driven from the joint effect of persistent long-fetch winds and the indirect effect of the Southern Annular Mode. Along with these changes, we found that zooplankton components, i.e. ciliates and the dominant estuarine copepod Acartia tonsa, showed a negative trend during the period 1986-2011. We showed that the combined effects of wind and turbidity with other environmental variables (chlorophyll, salinity and nutrients) consistently explained the variability of observed shifts. Tintinnids were more vulnerable to wind patterns and turbidity while showed a loss of synchrony with primary productivity. Water turbidity produced a dome-like pattern on tintinnids, oligotrichs and A. tonsa, implying that the highest abundance of organisms occurred under moderate values (∼50 NTU) of turbidity. In contrast, the response to wind patterns was not generalizable probably owing to species-specific traits. Observed trends denote that wind-induced processes in shallow ecosystems with internal sources of suspended sediments, are essential on ciliate dynamics and that such effects can propagate trough the interannual variability of copepods.
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Affiliation(s)
- M Celeste López-Abbate
- Instituto Argentino de Oceanografía (CONICET-UNS), Camino La Carrindanga Km 7.5, 8000, Bahía Blanca, Argentina.
| | - Juan-Carlos Molinero
- Institut de Recherche pour le Développement (IRD), UMR248 MARBEC, IRD/CNRS/IFREMER/UM, Sète Cedex, France
| | - Gerardo M E Perillo
- Instituto Argentino de Oceanografía (CONICET-UNS), Camino La Carrindanga Km 7.5, 8000, Bahía Blanca, Argentina
| | - M Sonia Barría de Cao
- Instituto Argentino de Oceanografía (CONICET-UNS), Camino La Carrindanga Km 7.5, 8000, Bahía Blanca, Argentina
| | - Rosa E Pettigrosso
- Departamento de Biología, Universidad Nacional del Sur, Av. Alem 1253, 8000, Bahía Blanca, Argentina
| | - Valeria A Guinder
- Instituto Argentino de Oceanografía (CONICET-UNS), Camino La Carrindanga Km 7.5, 8000, Bahía Blanca, Argentina
| | - Román Uibrig
- Instituto Argentino de Oceanografía (CONICET-UNS), Camino La Carrindanga Km 7.5, 8000, Bahía Blanca, Argentina
| | - Anabela A Berasategui
- Instituto Argentino de Oceanografía (CONICET-UNS), Camino La Carrindanga Km 7.5, 8000, Bahía Blanca, Argentina
| | - Alejandro Vitale
- Instituto Argentino de Oceanografía (CONICET-UNS), Camino La Carrindanga Km 7.5, 8000, Bahía Blanca, Argentina
| | - Jorge E Marcovecchio
- Instituto Argentino de Oceanografía (CONICET-UNS), Camino La Carrindanga Km 7.5, 8000, Bahía Blanca, Argentina; Universidad Tecnológica Nacional, Facultad Regional Bahía Blanca (UTN-BHI), 11 de Abril 461, 8000, Bahía Blanca, Argentina; Universidad FASTA, Facultad de Ingeniería, Gascón 3145, 7600, Mar del Plata, Argentina
| | - Mónica S Hoffmeyer
- Instituto Argentino de Oceanografía (CONICET-UNS), Camino La Carrindanga Km 7.5, 8000, Bahía Blanca, Argentina
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18
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Obolewski K, Glińska-Lewczuk K, Bąkowska M, Szymańska M, Mrozińska N. Patterns of phytoplankton composition in coastal lakes differed by connectivity with the Baltic Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 631-632:951-961. [PMID: 29728006 DOI: 10.1016/j.scitotenv.2018.03.112] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/06/2018] [Accepted: 03/10/2018] [Indexed: 06/08/2023]
Abstract
The study was aimed to analyse reactions of the major groups of phytoplankton to the mixing regime of fresh and brackish waters in coastal lakes and the associated changes in physicochemical properties of lake waters. For this purpose, on the basis of data collected from 6 coastal lakes located along the southern coast of the Baltic Sea, differing in intensity of intrusion of brackish sea water: limnetic, L (2), limnetic/oligohaline, L/O (2), and oligohaline, O (2), we assessed the associations of major phytoplankton groups with environmental conditions. Statistical analyses revealed that the structure of phytoplankton groups significantly differed among three lakes types, and the variation in these variables was best explained by water temperature, total phosphorus, salinity, PO43-, transparency, dissolved oxygen, and NO3-. Relative phytoplankton biomass showed significant differences among the O-L/O-L lake types and formed the following proportion 1:2:3.5. Cyanobacteria constituted a dominant algae group in the lakes, showing the decreasing trend from 86.5% in the L to 69.3% in the O lakes. The indicator value analysis showed that all the studied lakes were dominated by algae preferring freshwater habitats, among which Cyanobacteria and Cryptophyta were indicator groups. Redundancy analysis showed that increasing salinity has got a negative effect on Cyanobacteria and Bacillariophyta biomass, and did not stimulate the development of any algal group. In the coastal lakes we observed 2 distinct stable states (limnetic and oligohaline) as well as transitional phases between them: (1) seaward drift (limnetic-oligohaline) with increasing salinity, and (2) landward drift (oligohaline-limnetic) with decreasing salinity. Algal communities showed the most distinct differences in biomass in limnetic and oligohaline states. These observations suggest that the structure and biomass of phytoplankton may respond gradually on the level of hydrological connectivity, or may respond abruptly creating two alternative stable states: limnetic and oligohaline.
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Affiliation(s)
- Krystian Obolewski
- Department of Hydrobiology, Kazimierz Wielki University, Chodkiewicza str. 30, 85-064 Bydgoszcz, Poland.
| | - Katarzyna Glińska-Lewczuk
- Department of Water Resources, Climatology and Environmental Management, University of Warmia and Mazury, Łódzki Sq. 2, 10-719 Olsztyn-Kortowo, Poland
| | - Martyna Bąkowska
- Department of Hydrobiology, Kazimierz Wielki University, Chodkiewicza str. 30, 85-064 Bydgoszcz, Poland
| | - Monika Szymańska
- Department of Hydrobiology, Kazimierz Wielki University, Chodkiewicza str. 30, 85-064 Bydgoszcz, Poland
| | - Natalia Mrozińska
- Department of Hydrobiology, Kazimierz Wielki University, Chodkiewicza str. 30, 85-064 Bydgoszcz, Poland
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