Seasonal fluctuations of Rotifera in a tropical lake in Amazonia (Acre River floodplain, Brazil)
Abstract Background: The tropics are centers of high biodiversity of Rotifera that are highly variable and abundant. They play a key role since they are a link in the interaction network with members of other communities. Temporal changes in the community structure of the Rotifera assemblage is related to hydrologic phases. Goals: In this study, we focus on testing the hypothesis that the seasonal changes in alpha diversity and abundance (standing stocks) of Rotifera (Monogononta), considering also limnological variables, are mainly related to rainfall patterns. We consider four seasons based on rainfall: rainy, very rainy, dry, and very dry. Methods: Between 2008 and 2009, rotifers were sampled monthly with a plankton net in qualitative and quantitative sampling, and seven limnological variables were recorded at three sampling stations along Lake Amapá. Results: We found approximately 23% of all Rotifera listed for the Amazonia. The high Menhinick index revealed a high species dominance, except in the rainy season. The Shannon index did not show a greater distribution of organisms (0.3844 to 0.8886) independent of the layer and time season. In general, the equability index showed that all species were equally abundant in all seasons, with higher values at the surface and in the middle of the water column. The limnological variables also showed differences between all seasons in at least a layer of the water column. Conclusions: The seasons influenced the fluctuations in the communities of Rotifera of Lake Amapá, which led to a different species distribution pattern over time.
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Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud
2018
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oai:scielo:S0188-889720180003003352020-03-25Seasonal fluctuations of Rotifera in a tropical lake in Amazonia (Acre River floodplain, Brazil)Cassiano Keppeler,ErleiJacob Serra,AlzeniraSoares Vieira,Lisandro Junode Oliveira Pereira,JardelyTorres da Silva,MaralinaAlencar dos Santos,Maria JoséSergio Ferraudo,Antonio abundance oxbow lake rainfall zooplankton Abstract Background: The tropics are centers of high biodiversity of Rotifera that are highly variable and abundant. They play a key role since they are a link in the interaction network with members of other communities. Temporal changes in the community structure of the Rotifera assemblage is related to hydrologic phases. Goals: In this study, we focus on testing the hypothesis that the seasonal changes in alpha diversity and abundance (standing stocks) of Rotifera (Monogononta), considering also limnological variables, are mainly related to rainfall patterns. We consider four seasons based on rainfall: rainy, very rainy, dry, and very dry. Methods: Between 2008 and 2009, rotifers were sampled monthly with a plankton net in qualitative and quantitative sampling, and seven limnological variables were recorded at three sampling stations along Lake Amapá. Results: We found approximately 23% of all Rotifera listed for the Amazonia. The high Menhinick index revealed a high species dominance, except in the rainy season. The Shannon index did not show a greater distribution of organisms (0.3844 to 0.8886) independent of the layer and time season. In general, the equability index showed that all species were equally abundant in all seasons, with higher values at the surface and in the middle of the water column. The limnological variables also showed differences between all seasons in at least a layer of the water column. Conclusions: The seasons influenced the fluctuations in the communities of Rotifera of Lake Amapá, which led to a different species distribution pattern over time.info:eu-repo/semantics/openAccessUniversidad Autónoma Metropolitana, División de Ciencias Biológicas y de la SaludHidrobiológica v.28 n.3 20182018-12-01info:eu-repo/semantics/articletext/htmlhttp://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0188-88972018000300335en10.24275/uam/izt/dcbs/hidro/2018v28n3/cassiano |
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Cassiano Keppeler,Erlei Jacob Serra,Alzenira Soares Vieira,Lisandro Juno de Oliveira Pereira,Jardely Torres da Silva,Maralina Alencar dos Santos,Maria José Sergio Ferraudo,Antonio |
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Cassiano Keppeler,Erlei Jacob Serra,Alzenira Soares Vieira,Lisandro Juno de Oliveira Pereira,Jardely Torres da Silva,Maralina Alencar dos Santos,Maria José Sergio Ferraudo,Antonio Seasonal fluctuations of Rotifera in a tropical lake in Amazonia (Acre River floodplain, Brazil) |
author_facet |
Cassiano Keppeler,Erlei Jacob Serra,Alzenira Soares Vieira,Lisandro Juno de Oliveira Pereira,Jardely Torres da Silva,Maralina Alencar dos Santos,Maria José Sergio Ferraudo,Antonio |
author_sort |
Cassiano Keppeler,Erlei |
title |
Seasonal fluctuations of Rotifera in a tropical lake in Amazonia (Acre River floodplain, Brazil) |
title_short |
Seasonal fluctuations of Rotifera in a tropical lake in Amazonia (Acre River floodplain, Brazil) |
title_full |
Seasonal fluctuations of Rotifera in a tropical lake in Amazonia (Acre River floodplain, Brazil) |
title_fullStr |
Seasonal fluctuations of Rotifera in a tropical lake in Amazonia (Acre River floodplain, Brazil) |
title_full_unstemmed |
Seasonal fluctuations of Rotifera in a tropical lake in Amazonia (Acre River floodplain, Brazil) |
title_sort |
seasonal fluctuations of rotifera in a tropical lake in amazonia (acre river floodplain, brazil) |
description |
Abstract Background: The tropics are centers of high biodiversity of Rotifera that are highly variable and abundant. They play a key role since they are a link in the interaction network with members of other communities. Temporal changes in the community structure of the Rotifera assemblage is related to hydrologic phases. Goals: In this study, we focus on testing the hypothesis that the seasonal changes in alpha diversity and abundance (standing stocks) of Rotifera (Monogononta), considering also limnological variables, are mainly related to rainfall patterns. We consider four seasons based on rainfall: rainy, very rainy, dry, and very dry. Methods: Between 2008 and 2009, rotifers were sampled monthly with a plankton net in qualitative and quantitative sampling, and seven limnological variables were recorded at three sampling stations along Lake Amapá. Results: We found approximately 23% of all Rotifera listed for the Amazonia. The high Menhinick index revealed a high species dominance, except in the rainy season. The Shannon index did not show a greater distribution of organisms (0.3844 to 0.8886) independent of the layer and time season. In general, the equability index showed that all species were equally abundant in all seasons, with higher values at the surface and in the middle of the water column. The limnological variables also showed differences between all seasons in at least a layer of the water column. Conclusions: The seasons influenced the fluctuations in the communities of Rotifera of Lake Amapá, which led to a different species distribution pattern over time. |
publisher |
Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud |
publishDate |
2018 |
url |
http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0188-88972018000300335 |
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