Both lake regime and fish introduction shape autotrophic planktonic communities of lakes from the Patagonian Plateau (Argentina)
Strobel Plateau hosts more than 1,500 shallow lakes displaying different water regimes, which constitute the habitat for many species. Although the region is naturally fishless, many of the lakes were stocked with trout, bearing uncertainty about the possible effects on the ecosystem. The main objec...
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2019
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v831_n1_p133_Francisco http://hdl.handle.net/20.500.12110/paper_00188158_v831_n1_p133_Francisco |
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paper:paper_00188158_v831_n1_p133_Francisco2023-06-08T14:40:02Z Both lake regime and fish introduction shape autotrophic planktonic communities of lakes from the Patagonian Plateau (Argentina) Bottom-up Fish-stocked lakes Fishless lakes Phytoplankton Shallow lakes Strobel Plateau Top-down Trout autotrophy bottom-up control cyanobacterium dominance hydrological regime introduced species lake ecosystem phytoplankton picoplankton salmonid species diversity top-down control Argentina Santa Cruz [Argentina] Strobel Plateau Chlorophyta Cyanobacteria Salmonidae Strobel Plateau hosts more than 1,500 shallow lakes displaying different water regimes, which constitute the habitat for many species. Although the region is naturally fishless, many of the lakes were stocked with trout, bearing uncertainty about the possible effects on the ecosystem. The main objective of this study was to analyze the characteristics of planktonic autotrophic communities of lakes differing in regime (phytoplankton turbid, clear vegetated, and clear unvegetated) and presence/absence of fish. During late spring and summer, 14 water bodies were sampled in 2011 and 2013 considering different regimes and presence/absence of fish. Besides limnological variables, the autotrophic communities, from pico to microplankton, were also analyzed. Differences in physical and chemical characteristics observed among the lakes corresponded to their current regime and the presence/absence of trouts. Autotrophic picoplankton and phytoplankton > 20 µm abundances differed among lake types being highest in fish-stocked lakes. Although the three type of lakes presented phycoerythrin-rich picocyanobacteria and picoeukaryotes, only fish-stocked lakes hosted phycocyanin-rich picocyanobacteria. Moreover, fish-stocked lakes were dominated by cyanobacteria, while chlorophytes abounded in fishless systems. Evidences that lake regime and fish occurrence influence planktonic autotrophic communities of Strobel plateau is here provided, highlighting the intra- and interannual dynamism of the aquatic systems. © 2018, Springer International Publishing AG, part of Springer Nature. 2019 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v831_n1_p133_Francisco http://hdl.handle.net/20.500.12110/paper_00188158_v831_n1_p133_Francisco |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Bottom-up Fish-stocked lakes Fishless lakes Phytoplankton Shallow lakes Strobel Plateau Top-down Trout autotrophy bottom-up control cyanobacterium dominance hydrological regime introduced species lake ecosystem phytoplankton picoplankton salmonid species diversity top-down control Argentina Santa Cruz [Argentina] Strobel Plateau Chlorophyta Cyanobacteria Salmonidae |
| spellingShingle |
Bottom-up Fish-stocked lakes Fishless lakes Phytoplankton Shallow lakes Strobel Plateau Top-down Trout autotrophy bottom-up control cyanobacterium dominance hydrological regime introduced species lake ecosystem phytoplankton picoplankton salmonid species diversity top-down control Argentina Santa Cruz [Argentina] Strobel Plateau Chlorophyta Cyanobacteria Salmonidae Both lake regime and fish introduction shape autotrophic planktonic communities of lakes from the Patagonian Plateau (Argentina) |
| topic_facet |
Bottom-up Fish-stocked lakes Fishless lakes Phytoplankton Shallow lakes Strobel Plateau Top-down Trout autotrophy bottom-up control cyanobacterium dominance hydrological regime introduced species lake ecosystem phytoplankton picoplankton salmonid species diversity top-down control Argentina Santa Cruz [Argentina] Strobel Plateau Chlorophyta Cyanobacteria Salmonidae |
| description |
Strobel Plateau hosts more than 1,500 shallow lakes displaying different water regimes, which constitute the habitat for many species. Although the region is naturally fishless, many of the lakes were stocked with trout, bearing uncertainty about the possible effects on the ecosystem. The main objective of this study was to analyze the characteristics of planktonic autotrophic communities of lakes differing in regime (phytoplankton turbid, clear vegetated, and clear unvegetated) and presence/absence of fish. During late spring and summer, 14 water bodies were sampled in 2011 and 2013 considering different regimes and presence/absence of fish. Besides limnological variables, the autotrophic communities, from pico to microplankton, were also analyzed. Differences in physical and chemical characteristics observed among the lakes corresponded to their current regime and the presence/absence of trouts. Autotrophic picoplankton and phytoplankton > 20 µm abundances differed among lake types being highest in fish-stocked lakes. Although the three type of lakes presented phycoerythrin-rich picocyanobacteria and picoeukaryotes, only fish-stocked lakes hosted phycocyanin-rich picocyanobacteria. Moreover, fish-stocked lakes were dominated by cyanobacteria, while chlorophytes abounded in fishless systems. Evidences that lake regime and fish occurrence influence planktonic autotrophic communities of Strobel plateau is here provided, highlighting the intra- and interannual dynamism of the aquatic systems. © 2018, Springer International Publishing AG, part of Springer Nature. |
| title |
Both lake regime and fish introduction shape autotrophic planktonic communities of lakes from the Patagonian Plateau (Argentina) |
| title_short |
Both lake regime and fish introduction shape autotrophic planktonic communities of lakes from the Patagonian Plateau (Argentina) |
| title_full |
Both lake regime and fish introduction shape autotrophic planktonic communities of lakes from the Patagonian Plateau (Argentina) |
| title_fullStr |
Both lake regime and fish introduction shape autotrophic planktonic communities of lakes from the Patagonian Plateau (Argentina) |
| title_full_unstemmed |
Both lake regime and fish introduction shape autotrophic planktonic communities of lakes from the Patagonian Plateau (Argentina) |
| title_sort |
both lake regime and fish introduction shape autotrophic planktonic communities of lakes from the patagonian plateau (argentina) |
| publishDate |
2019 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v831_n1_p133_Francisco http://hdl.handle.net/20.500.12110/paper_00188158_v831_n1_p133_Francisco |
| _version_ |
1768542722221670400 |