Microplankton dynamics under heavy anthropogenic pressure. The case of the Bahía Blanca Estuary, southwestern Atlantic Ocean
Quantifying biotic feedbacks in response to environmental signals is fundamental to assess ecosystem perturbation. We analyzed the joint effects of eutrophication, derived from sewage pollution, and climate at the base of the pelagic food web in the Bahía Blanca Estuary (SW Atlantic Ocean). A two-ye...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0025326X_v95_n1_p305_LopezAbbate http://hdl.handle.net/20.500.12110/paper_0025326X_v95_n1_p305_LopezAbbate |
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paper:paper_0025326X_v95_n1_p305_LopezAbbate2023-06-08T14:53:07Z Microplankton dynamics under heavy anthropogenic pressure. The case of the Bahía Blanca Estuary, southwestern Atlantic Ocean Climate Estuaries Eutrophication Microplankton Nutrient stoichiometry Path analysis Ecology Ecosystems Estuaries Nutrients Phytoplankton Plankton Pollution Regression analysis Sewage Social networking (online) Stoichiometry Anthropogenic eutrophication Climate Ecological stoichiometry Microplankton communities Microplanktons Path analysis Phytoplankton abundances Southwestern Atlantic Ocean Eutrophication phosphorus sewage abundance environmental conditions eutrophication food web human activity microplankton nutrient dynamics path analysis phytoplankton stoichiometry algal growth anthropogenic pressure Article Atlantic Ocean biogeochemistry biomass controlled study estuary eutrophication food web microplankton nonhuman path analysis pelagic zone population abundance population dynamics sewage stoichiometry Argentina climate ecosystem estuary eutrophication food chain growth, development and aging phytoplankton plankton sewage water pollution Argentina Atlantic Ocean Atlantic Ocean (Southwest) Bahia Blanca Estuary Buenos Aires [Argentina] Argentina Atlantic Ocean Biomass Climate Ecosystem Estuaries Eutrophication Food Chain Phosphorus Phytoplankton Plankton Sewage Water Pollution Quantifying biotic feedbacks in response to environmental signals is fundamental to assess ecosystem perturbation. We analyzed the joint effects of eutrophication, derived from sewage pollution, and climate at the base of the pelagic food web in the Bahía Blanca Estuary (SW Atlantic Ocean). A two-year survey of environmental conditions and microplankton communities was conducted in two sites affected by contrasting anthropogenic eutrophication conditions. Under severe eutrophication, we found higher phytoplankton abundance consistently dominated by smaller sized, non siliceous species, while microzooplankton abundance remained lower and nutrient stoichiometry showed conspicuous deviations from the Redfield ratio. Phytoplankton growth in such conditions appeared controlled by phosphorous. In turn, microplankton biomass and phytoplankton size ratio (<20. μm:>20. μm) displayed a saturation relationship with nutrients in the highly eutrophic area, although mean phytoplankton growth was similar in both eutrophic systems. The strength of links within the estuarine network, quantified through path analysis, showed enhanced relationships under larger anthropogenic eutrophication, which fostered the climate influence on microplankton communities. Our results show conspicuous effects of severe sewage pollution on the ecological stoichiometry, i.e., N and P excess with respect to Si, altering nutrient ratios for microplankton communities. This warns on wide consequences on food web dynamics and ultimately in ecosystem assets of coastal pelagic environments. © 2015 Elsevier Ltd. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0025326X_v95_n1_p305_LopezAbbate http://hdl.handle.net/20.500.12110/paper_0025326X_v95_n1_p305_LopezAbbate |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Climate Estuaries Eutrophication Microplankton Nutrient stoichiometry Path analysis Ecology Ecosystems Estuaries Nutrients Phytoplankton Plankton Pollution Regression analysis Sewage Social networking (online) Stoichiometry Anthropogenic eutrophication Climate Ecological stoichiometry Microplankton communities Microplanktons Path analysis Phytoplankton abundances Southwestern Atlantic Ocean Eutrophication phosphorus sewage abundance environmental conditions eutrophication food web human activity microplankton nutrient dynamics path analysis phytoplankton stoichiometry algal growth anthropogenic pressure Article Atlantic Ocean biogeochemistry biomass controlled study estuary eutrophication food web microplankton nonhuman path analysis pelagic zone population abundance population dynamics sewage stoichiometry Argentina climate ecosystem estuary eutrophication food chain growth, development and aging phytoplankton plankton sewage water pollution Argentina Atlantic Ocean Atlantic Ocean (Southwest) Bahia Blanca Estuary Buenos Aires [Argentina] Argentina Atlantic Ocean Biomass Climate Ecosystem Estuaries Eutrophication Food Chain Phosphorus Phytoplankton Plankton Sewage Water Pollution |
| spellingShingle |
Climate Estuaries Eutrophication Microplankton Nutrient stoichiometry Path analysis Ecology Ecosystems Estuaries Nutrients Phytoplankton Plankton Pollution Regression analysis Sewage Social networking (online) Stoichiometry Anthropogenic eutrophication Climate Ecological stoichiometry Microplankton communities Microplanktons Path analysis Phytoplankton abundances Southwestern Atlantic Ocean Eutrophication phosphorus sewage abundance environmental conditions eutrophication food web human activity microplankton nutrient dynamics path analysis phytoplankton stoichiometry algal growth anthropogenic pressure Article Atlantic Ocean biogeochemistry biomass controlled study estuary eutrophication food web microplankton nonhuman path analysis pelagic zone population abundance population dynamics sewage stoichiometry Argentina climate ecosystem estuary eutrophication food chain growth, development and aging phytoplankton plankton sewage water pollution Argentina Atlantic Ocean Atlantic Ocean (Southwest) Bahia Blanca Estuary Buenos Aires [Argentina] Argentina Atlantic Ocean Biomass Climate Ecosystem Estuaries Eutrophication Food Chain Phosphorus Phytoplankton Plankton Sewage Water Pollution Microplankton dynamics under heavy anthropogenic pressure. The case of the Bahía Blanca Estuary, southwestern Atlantic Ocean |
| topic_facet |
Climate Estuaries Eutrophication Microplankton Nutrient stoichiometry Path analysis Ecology Ecosystems Estuaries Nutrients Phytoplankton Plankton Pollution Regression analysis Sewage Social networking (online) Stoichiometry Anthropogenic eutrophication Climate Ecological stoichiometry Microplankton communities Microplanktons Path analysis Phytoplankton abundances Southwestern Atlantic Ocean Eutrophication phosphorus sewage abundance environmental conditions eutrophication food web human activity microplankton nutrient dynamics path analysis phytoplankton stoichiometry algal growth anthropogenic pressure Article Atlantic Ocean biogeochemistry biomass controlled study estuary eutrophication food web microplankton nonhuman path analysis pelagic zone population abundance population dynamics sewage stoichiometry Argentina climate ecosystem estuary eutrophication food chain growth, development and aging phytoplankton plankton sewage water pollution Argentina Atlantic Ocean Atlantic Ocean (Southwest) Bahia Blanca Estuary Buenos Aires [Argentina] Argentina Atlantic Ocean Biomass Climate Ecosystem Estuaries Eutrophication Food Chain Phosphorus Phytoplankton Plankton Sewage Water Pollution |
| description |
Quantifying biotic feedbacks in response to environmental signals is fundamental to assess ecosystem perturbation. We analyzed the joint effects of eutrophication, derived from sewage pollution, and climate at the base of the pelagic food web in the Bahía Blanca Estuary (SW Atlantic Ocean). A two-year survey of environmental conditions and microplankton communities was conducted in two sites affected by contrasting anthropogenic eutrophication conditions. Under severe eutrophication, we found higher phytoplankton abundance consistently dominated by smaller sized, non siliceous species, while microzooplankton abundance remained lower and nutrient stoichiometry showed conspicuous deviations from the Redfield ratio. Phytoplankton growth in such conditions appeared controlled by phosphorous. In turn, microplankton biomass and phytoplankton size ratio (<20. μm:>20. μm) displayed a saturation relationship with nutrients in the highly eutrophic area, although mean phytoplankton growth was similar in both eutrophic systems. The strength of links within the estuarine network, quantified through path analysis, showed enhanced relationships under larger anthropogenic eutrophication, which fostered the climate influence on microplankton communities. Our results show conspicuous effects of severe sewage pollution on the ecological stoichiometry, i.e., N and P excess with respect to Si, altering nutrient ratios for microplankton communities. This warns on wide consequences on food web dynamics and ultimately in ecosystem assets of coastal pelagic environments. © 2015 Elsevier Ltd. |
| title |
Microplankton dynamics under heavy anthropogenic pressure. The case of the Bahía Blanca Estuary, southwestern Atlantic Ocean |
| title_short |
Microplankton dynamics under heavy anthropogenic pressure. The case of the Bahía Blanca Estuary, southwestern Atlantic Ocean |
| title_full |
Microplankton dynamics under heavy anthropogenic pressure. The case of the Bahía Blanca Estuary, southwestern Atlantic Ocean |
| title_fullStr |
Microplankton dynamics under heavy anthropogenic pressure. The case of the Bahía Blanca Estuary, southwestern Atlantic Ocean |
| title_full_unstemmed |
Microplankton dynamics under heavy anthropogenic pressure. The case of the Bahía Blanca Estuary, southwestern Atlantic Ocean |
| title_sort |
microplankton dynamics under heavy anthropogenic pressure. the case of the bahía blanca estuary, southwestern atlantic ocean |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0025326X_v95_n1_p305_LopezAbbate http://hdl.handle.net/20.500.12110/paper_0025326X_v95_n1_p305_LopezAbbate |
| _version_ |
1768546618759446528 |