Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes?
We investigated nine Pampean shallow lakes (Argentina) across a moisture gradient (mean annual precipitation 1,000–500 mm), under the framework of a network project of lake monitoring whose main objective was to analyse the responses of ecosystems to different stressors associated with human activit...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v752_n1_p47_Izaguirre http://hdl.handle.net/20.500.12110/paper_00188158_v752_n1_p47_Izaguirre |
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paper:paper_00188158_v752_n1_p47_Izaguirre2023-06-08T14:39:58Z Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes? Algal blooms Functional groups: functional diversity Pampa plain Phytoplankton Shallow lakes abundance algal bloom biomass canalization (biology) dominance environmental factor environmental monitoring eutrophication functional group geographical region green alga human activity moisture content phytoplankton population structure shallow water species diversity water level Argentina Pampas algae Chlorophyta Cyanobacteria We investigated nine Pampean shallow lakes (Argentina) across a moisture gradient (mean annual precipitation 1,000–500 mm), under the framework of a network project of lake monitoring whose main objective was to analyse the responses of ecosystems to different stressors associated with human activities. We postulate that species bloom in different shallow lakes will be determined mainly by local optical features, nutrients and salinity. We analysed the phytoplankton structure during the warm season 2012–2013, identifying those species and functional groups that proliferate in the lakes. Most lakes showed high phytoplankton biomass, except a saline lake located in the driest part of the gradient and an inorganic turbid lake. In some lakes, cyanobacteria blooms occurred in summer, persisting until autumn. Small colonial cyanobacteria and small fast-growing chlorophytes were abundant in most turbid enriched and anthropogenically impacted systems. Lowest species and functional diversity occurred in the saline lake. Multivariate analysis indicated that the phytoplankton structure was mainly defined by conductivity, transparency and variables associated with the trophic state, also reflecting the importance of the geographical location. Our results evidenced the vulnerability of most shallow lakes in the region to water level fluctuations, eutrophication and canalization. © 2014, Springer International Publishing Switzerland. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v752_n1_p47_Izaguirre http://hdl.handle.net/20.500.12110/paper_00188158_v752_n1_p47_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 |
Algal blooms Functional groups: functional diversity Pampa plain Phytoplankton Shallow lakes abundance algal bloom biomass canalization (biology) dominance environmental factor environmental monitoring eutrophication functional group geographical region green alga human activity moisture content phytoplankton population structure shallow water species diversity water level Argentina Pampas algae Chlorophyta Cyanobacteria |
| spellingShingle |
Algal blooms Functional groups: functional diversity Pampa plain Phytoplankton Shallow lakes abundance algal bloom biomass canalization (biology) dominance environmental factor environmental monitoring eutrophication functional group geographical region green alga human activity moisture content phytoplankton population structure shallow water species diversity water level Argentina Pampas algae Chlorophyta Cyanobacteria Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes? |
| topic_facet |
Algal blooms Functional groups: functional diversity Pampa plain Phytoplankton Shallow lakes abundance algal bloom biomass canalization (biology) dominance environmental factor environmental monitoring eutrophication functional group geographical region green alga human activity moisture content phytoplankton population structure shallow water species diversity water level Argentina Pampas algae Chlorophyta Cyanobacteria |
| description |
We investigated nine Pampean shallow lakes (Argentina) across a moisture gradient (mean annual precipitation 1,000–500 mm), under the framework of a network project of lake monitoring whose main objective was to analyse the responses of ecosystems to different stressors associated with human activities. We postulate that species bloom in different shallow lakes will be determined mainly by local optical features, nutrients and salinity. We analysed the phytoplankton structure during the warm season 2012–2013, identifying those species and functional groups that proliferate in the lakes. Most lakes showed high phytoplankton biomass, except a saline lake located in the driest part of the gradient and an inorganic turbid lake. In some lakes, cyanobacteria blooms occurred in summer, persisting until autumn. Small colonial cyanobacteria and small fast-growing chlorophytes were abundant in most turbid enriched and anthropogenically impacted systems. Lowest species and functional diversity occurred in the saline lake. Multivariate analysis indicated that the phytoplankton structure was mainly defined by conductivity, transparency and variables associated with the trophic state, also reflecting the importance of the geographical location. Our results evidenced the vulnerability of most shallow lakes in the region to water level fluctuations, eutrophication and canalization. © 2014, Springer International Publishing Switzerland. |
| title |
Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes? |
| title_short |
Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes? |
| title_full |
Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes? |
| title_fullStr |
Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes? |
| title_full_unstemmed |
Which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes? |
| title_sort |
which environmental factors trigger the dominance of phytoplankton species across a moisture gradient of shallow lakes? |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v752_n1_p47_Izaguirre http://hdl.handle.net/20.500.12110/paper_00188158_v752_n1_p47_Izaguirre |
| _version_ |
1768542300344942592 |