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Ma X, Miao X, Fan S, Zang Y, Zhang B, Li M, Zhang X, Fu M, Wang Z, Xiao J. Dynamics of green macroalgal micro-propagules and the influencing factors in the southern Yellow Sea, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 940:173658. [PMID: 38821269 DOI: 10.1016/j.scitotenv.2024.173658] [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: 02/26/2024] [Revised: 04/18/2024] [Accepted: 05/29/2024] [Indexed: 06/02/2024]
Abstract
Micro-propagules (banks of microscopic forms) play important roles in the expansion of green tides, which are spreading on eutrophic coasts worldwide. In particular, large-scale green tides (Yellow Sea Green Tide, YSGTs) have persisted in the Yellow Sea for over 15 years, but the dynamics and functions of micro-propagules in their development remain unclear. In the present study, year-round field surveys were conducted to identify the reservoirs and investigate the persistence mechanisms and associated biotic and abiotic factors driving the temporal and spatial variations of micro-propagules. Micro-propagules in the southern Yellow Sea (SYS) showed evident spatial heterogeneity in terms of seasonal patterns and major influencing factors. Offshore of the SYS, the micro-propagule population underwent ephemeral expansion along with a large-scale bloom of floating Ulva algae in late spring and early summer. The Subei Shoal, particularly the sediments in the central raft region, had the highest micro-propagule abundance (MA) and was a major reservoir. The pronounced seasonal variation of MA in the Subei Shoal was primarily associated with the attached Ulva algae on Neopyropia aquaculture rafts. Vast aquaculture rafts provided essential substrates for micro-propagules to complete their life cycle and replenish the seed bank, thereby sustaining persistent YSGTs. It implied that habitat modification has pronounced ecological impacts on this intertidal muddy flat. The unique environmental conditions (enriched nutrients, esp. nitrate, favourable seawater temperatures in spring, and strong tidal mixing) facilitated the abundance, seasonal variation and recruitment of micro-propagules in the Subei Shoal. Given the current mitigation measures implemented in the raft region, further research is required to monitor and investigate the physiological and ecological responses of micro-propagule populations to the complex hydrobiological, geochemical, and physical matrices.
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Affiliation(s)
- Xiaojun Ma
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China
| | - Xiaoxiang Miao
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China
| | - Shiliang Fan
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China; Laboratory for Marine Ecology and Environment Science, Laoshan Laboratory, Qingdao 266237, China
| | - Yu Zang
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China; Laboratory for Marine Ecology and Environment Science, Laoshan Laboratory, Qingdao 266237, China
| | - Baotang Zhang
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China
| | - Mei Li
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China
| | - Xuelei Zhang
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China; Laboratory for Marine Ecology and Environment Science, Laoshan Laboratory, Qingdao 266237, China
| | - Mingzhu Fu
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China; Laboratory for Marine Ecology and Environment Science, Laoshan Laboratory, Qingdao 266237, China
| | - Zongling Wang
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China; Laboratory for Marine Ecology and Environment Science, Laoshan Laboratory, Qingdao 266237, China
| | - Jie Xiao
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, MNR, Qingdao 266061, China; Laboratory for Marine Ecology and Environment Science, Laoshan Laboratory, Qingdao 266237, China.
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Yang D, Yuen KV, Gu X, Sun C, Gao L. Influences of environmental factors on the dissipation of green tides in the Yellow Sea, China. MARINE POLLUTION BULLETIN 2023; 189:114737. [PMID: 36863273 DOI: 10.1016/j.marpolbul.2023.114737] [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: 10/19/2022] [Revised: 01/22/2023] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
Green tides attack the Yellow Sea every year since 2007 and have caused substantial financial loss. Based on Haiyang-1C/Coastal zone imager (HY-1C/CZI) and Terra/MODIS satellite images, the temporal and spatial distribution of green tides floating in the Yellow Sea during 2019 was extracted. The relationships between the growth rate of the green tides and the environmental factors including sea surface temperature (SST), photosynthetically active radiation (PAR), sea surface salinity (SSS), nitrate and phosphate during the green tides' dissipation phase has been detected. Based on the maximum likelihood estimation, a regression model that includes SST, PAR and phosphate was recommended to predict the growth rate of the green tides in the dissipation phase (R2 = 0.63), and this model was also examined using Bayesian information criterion and Akaike information criterion. When the average SST in the study area was above 23.6 °C, the coverage of green tides began to decrease with the increase in temperature under the influence of PAR. The growth rate of the green tides was related to SST (R = -0.38), PAR (R = -0.67) and phosphate (R = 0.40) in the dissipation phase. Compared with HY-1C/CZI, the green tide area extracted using Terra/MODIS tended to be underestimated when the green tide patches were smaller than 11.2 km2. Otherwise, the lower spatial resolution of MODIS resulted in larger mixed pixels of water and algae, which would overestimate the total area of the green tides.
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Affiliation(s)
- Dian Yang
- State Key Laboratory of Internet of Things for Smart City and Department of Civil and Environmental Engineering, University of Macau, Macao; Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China; University of Chinese Academy of Sciences, Beijing 100094, China; Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resources, Beijing 100081, China; National Satellite Ocean Application Service, Ministry of Natural Resources, Beijing 100081, China.
| | - Ka-Veng Yuen
- State Key Laboratory of Internet of Things for Smart City and Department of Civil and Environmental Engineering, University of Macau, Macao.
| | - Xingfa Gu
- Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China; University of Chinese Academy of Sciences, Beijing 100094, China; School of Remote Sensing and Information Engineering, North China Institute of Aerospace Engineering, Langfang 065000, China.
| | - Chan Sun
- National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China
| | - Liang Gao
- State Key Laboratory of Internet of Things for Smart City and Department of Civil and Environmental Engineering, University of Macau, Macao.
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Sanchez-Arcos C, Paris D, Mazzella V, Mutalipassi M, Costantini M, Buia MC, von Elert E, Cutignano A, Zupo V. Responses of the Macroalga Ulva prolifera Müller to Ocean Acidification Revealed by Complementary NMR- and MS-Based Omics Approaches. Mar Drugs 2022; 20:md20120743. [PMID: 36547890 PMCID: PMC9783899 DOI: 10.3390/md20120743] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 11/29/2022] Open
Abstract
Ocean acidification (OA) is a dramatic perturbation of seawater environments due to increasing anthropogenic emissions of CO2. Several studies indicated that OA frequently induces marine biota stress and a reduction of biodiversity. Here, we adopted the macroalga Ulva prolifera as a model and applied a complementary multi-omics approach to investigate the metabolic profiles under normal and acidified conditions. Our results show that U. prolifera grows at higher rates in acidified environments. Consistently, we observed lower sucrose and phosphocreatine concentrations in response to a higher demand of energy for growth and a higher availability of essential amino acids, likely related to increased protein biosynthesis. In addition, pathways leading to signaling and deterrent compounds appeared perturbed. Finally, a remarkable shift was observed here for the first time in the fatty acid composition of triglycerides, with a decrease in the relative abundance of PUFAs towards an appreciable increase of palmitic acid, thus suggesting a remodeling in lipid biosynthesis. Overall, our studies revealed modulation of several biosynthetic pathways under OA conditions in which, besides the possible effects on the marine ecosystem, the metabolic changes of the alga should be taken into account considering its potential nutraceutical applications.
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Affiliation(s)
- Carlos Sanchez-Arcos
- Institute for Zoology, Cologne Biocenter University of Cologne, 50674 Köln, Germany
| | - Debora Paris
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Chimica Biomolecolare (ICB), 80078 Pozzuoli, Italy
| | - Valerio Mazzella
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Ischia Marine Center, 80077 Ischia, Italy
| | - Mirko Mutalipassi
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Calabria Marine Centre, 87071 Amendolara, Italy
| | - Maria Costantini
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, 80121 Napoli, Italy
| | - Maria Cristina Buia
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Ischia Marine Center, 80077 Ischia, Italy
| | - Eric von Elert
- Institute for Zoology, Cologne Biocenter University of Cologne, 50674 Köln, Germany
| | - Adele Cutignano
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Chimica Biomolecolare (ICB), 80078 Pozzuoli, Italy
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, 80121 Napoli, Italy
- Correspondence: (A.C.); (V.Z.); Tel.: +39-081-8675313 (A.C.); +39-081-5833503 (V.Z.)
| | - Valerio Zupo
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, 80077 Ischia, Italy
- Correspondence: (A.C.); (V.Z.); Tel.: +39-081-8675313 (A.C.); +39-081-5833503 (V.Z.)
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Miao X, Xiao J, Fan S, Zang Y, Zhang X, Wang Z. Assessing Herbivorous Impacts of Apohale sp. on the Ulva prolifera Green Tide in China. FRONTIERS IN PLANT SCIENCE 2021; 12:795560. [PMID: 34975983 PMCID: PMC8715085 DOI: 10.3389/fpls.2021.795560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 11/19/2021] [Indexed: 06/03/2023]
Abstract
An epiphytic gammarid species, Apohyale sp. , was abundant in the floating Ulva prolifera (U. prolifera), which forms large-scale green tides in the Yellow Sea (YSGT). Field observation and laboratory experiments were subsequently conducted to study the species identity, abundance, and grazing effects on the floating algal biomass. The abundance of Apohyale sp. showed great spatial variation and varied from 0.03 to 1.47 inds g-1 in the YSGT. In average, each gram of Apohyale sp. body mass can consume 0.43 and 0.60 g algal mass of U. prolifera per day, and the grazing rates varied among the algae cultured with different nutritional seawaters. It was estimated that grazing of Apohale sp. could efficiently reduce ~0.4 and 16.6% of the algal growth rates in Rudong and Qingdao, respectively. The U. prolifera fragments resulting from gnawing of Apohyale sp. had a higher growth rate and similar photosynthetic activities compared to the floating algae, indicating probably positive feedback on the floating algal biomass. This research corroborated the significant impact of Apohyale sp. on the floating algal mass of YSGT through the top-down control. However, further research is needed to understand the population dynamics of these primary predators and hence their correlation with the expansion or decline of YSGT, especially under the complex food webs in the southern Yellow Sea.
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Affiliation(s)
- Xiaoxiang Miao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, China
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
| | - Jie Xiao
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
- Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Shiliang Fan
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
- Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Yu Zang
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
- Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Xuelei Zhang
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
- Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Zongling Wang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, China
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
- Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
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Numerical Study on the Massive Outbreak of the Ulva prolifera Green Tides in the Southwestern Yellow Sea in 2021. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2021. [DOI: 10.3390/jmse9111167] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The most massive outbreak on record of the Ulva prolifera green tides in the southwestern Yellow Sea occurred in summer of 2021. The environmental factors were investigated based on observations and simulations. The results suggested that the significantly enhanced discharge of the Changjiang River since winter 2020–2021 was crucial for the outbreak of the Ulva prolifera green tides in the southwestern Yellow Sea, which could significantly have contributed to the nutrient enrichment off the Subei coast. Additionally, the southerly wind stress anomaly during winter 2020–2021 favored the upwind transport of Changjiang water. Numerical experiments showed that the remaining winter freshwater coming from the Changjiang River, which persisted in the Subei coast’s upper layer until spring 2021, exceeded the long-term average value by 20%. We demonstrated that these large amount of nutrient inputs, as an effective supplement, were the reason the green tides sharply emerged as an extensive outbreak in 2021. The easterly wind anomaly during spring 2021 contributed to the landing of Ulva prolifera off the Lunan coast.
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Miao X, Xiao J, Xu Q, Fan S, Wang Z, Wang X, Zhang X. Distribution and species diversity of the floating green macroalgae and micro-propagules in the Subei Shoal, southwestern Yellow Sea. PeerJ 2020; 8:e10538. [PMID: 33362976 PMCID: PMC7749999 DOI: 10.7717/peerj.10538] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 11/19/2020] [Indexed: 11/30/2022] Open
Abstract
Massive floating green macroalgae have formed harmful green tides in the Yellow Sea since 2007. To study the early development and the associated environmental factors for the green tide, a field survey was carried out in the Subei Shoal, southwestern Yellow Sea. Multiple species were identified in both floating green macroalgae and micro-propagules , while their abundances showed distinct spatial variations. The floating macroalgal biomass was widespread in the northern Subei Shoal and most abundant at 34°N. Ulva prolifera dominated (91.2% in average) the floating macroalgae, and the majority (88.5%) of U. prolifera was the ‘floating type’. In comparison, the micro-propagules were most abundant around the aquaculture rafts, and decreased significantly with the distance to the rafts. The dominant species of micro-propagules was U. linza (48.5%), followed by U. prolifera (35.1%). Their distinct distribution patterns and species diversity suggested little direct contribution of micro-propagules for the floating macroalgae. The spatial variation of the floating macroalgae was probably a combined result from the biomass source and environmental factors, while the abundance of micro-propagules was closely associated with the rafts. A positive correlation between the floating macroalgae and DO was observed and suggested active photosynthesis of the initial biomass in Subei Shoal. This study revealed specific distributional pattern and relationships among the floating macroalgae, micro-propagules and the environmental factors in the source region, which helps understanding the early blooming dynamics of the green tides in Yellow Sea.
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Affiliation(s)
- Xiaoxiang Miao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, China.,Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
| | - Jie Xiao
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China.,Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Qinzeng Xu
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China.,Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Shiliang Fan
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China.,Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Zongling Wang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, China.,Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China.,Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Xiao Wang
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China.,Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Xuelei Zhang
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China.,Laboratory of Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
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