Influence of fish introduction and water level decrease on lakes of the arid Patagonian plateaus with importance for biodiversity conservation
Biodiversity loss in shallow lakes is associated to several factors among which water level decrease and fish introduction are indicated as potential stressors. The Patagonian basaltic plateaus, located in one of the most arid regions of South America, hold thousands of shallow lakes and ponds and s...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_23519894_v14_n_p_Izaguirre http://hdl.handle.net/20.500.12110/paper_23519894_v14_n_p_Izaguirre |
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paper:paper_23519894_v14_n_p_Izaguirre2023-06-08T16:35:41Z Influence of fish introduction and water level decrease on lakes of the arid Patagonian plateaus with importance for biodiversity conservation Climate change Fish introduction Lakes Patagonian plateau Plankton Waterbird habitat Biodiversity loss in shallow lakes is associated to several factors among which water level decrease and fish introduction are indicated as potential stressors. The Patagonian basaltic plateaus, located in one of the most arid regions of South America, hold thousands of shallow lakes and ponds and some large lakes, where vegetated lakes are the prime habitat for waterbirds, including endemic threatened species. We studied 31different lakes at the two main Patagonian plateaus (Strobel and Buenos Aires) during successive spring-summer field trips from 2007 to 2016. We focused on the differences between fishless and stocked lakes under contrasting hydrologic regimes (relatively stable waters and decreasing water level. Our survey evidenced the effect of fish introduction and water level decrease on the limnological features of the lakes and their phyto and zooplankton communities. Arheic shallow lakes showed a decreased water level accompanied by an increased conductivity, and several shifted from a clear-vegetated state to a more turbid condition, with increased algal biomass and demise in submerged macrophytes. Fishless lakes presented higher total zooplankton and macrozooplankton biomass and lower phytoplankton biomass than fish stocked lakes. Our findings provide evidence that under a scenario of climate change, the effect of the decrease in water level may enhance the adverse effects of fish introduction. © 2018 The Authors 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_23519894_v14_n_p_Izaguirre http://hdl.handle.net/20.500.12110/paper_23519894_v14_n_p_Izaguirre |
| 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 change Fish introduction Lakes Patagonian plateau Plankton Waterbird habitat |
| spellingShingle |
Climate change Fish introduction Lakes Patagonian plateau Plankton Waterbird habitat Influence of fish introduction and water level decrease on lakes of the arid Patagonian plateaus with importance for biodiversity conservation |
| topic_facet |
Climate change Fish introduction Lakes Patagonian plateau Plankton Waterbird habitat |
| description |
Biodiversity loss in shallow lakes is associated to several factors among which water level decrease and fish introduction are indicated as potential stressors. The Patagonian basaltic plateaus, located in one of the most arid regions of South America, hold thousands of shallow lakes and ponds and some large lakes, where vegetated lakes are the prime habitat for waterbirds, including endemic threatened species. We studied 31different lakes at the two main Patagonian plateaus (Strobel and Buenos Aires) during successive spring-summer field trips from 2007 to 2016. We focused on the differences between fishless and stocked lakes under contrasting hydrologic regimes (relatively stable waters and decreasing water level. Our survey evidenced the effect of fish introduction and water level decrease on the limnological features of the lakes and their phyto and zooplankton communities. Arheic shallow lakes showed a decreased water level accompanied by an increased conductivity, and several shifted from a clear-vegetated state to a more turbid condition, with increased algal biomass and demise in submerged macrophytes. Fishless lakes presented higher total zooplankton and macrozooplankton biomass and lower phytoplankton biomass than fish stocked lakes. Our findings provide evidence that under a scenario of climate change, the effect of the decrease in water level may enhance the adverse effects of fish introduction. © 2018 The Authors |
| title |
Influence of fish introduction and water level decrease on lakes of the arid Patagonian plateaus with importance for biodiversity conservation |
| title_short |
Influence of fish introduction and water level decrease on lakes of the arid Patagonian plateaus with importance for biodiversity conservation |
| title_full |
Influence of fish introduction and water level decrease on lakes of the arid Patagonian plateaus with importance for biodiversity conservation |
| title_fullStr |
Influence of fish introduction and water level decrease on lakes of the arid Patagonian plateaus with importance for biodiversity conservation |
| title_full_unstemmed |
Influence of fish introduction and water level decrease on lakes of the arid Patagonian plateaus with importance for biodiversity conservation |
| title_sort |
influence of fish introduction and water level decrease on lakes of the arid patagonian plateaus with importance for biodiversity conservation |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_23519894_v14_n_p_Izaguirre http://hdl.handle.net/20.500.12110/paper_23519894_v14_n_p_Izaguirre |
| _version_ |
1768546136417632256 |