Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio Paraná
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da Universidade Estadual de Maringá (RI-UEM) |
Texto Completo: | http://repositorio.uem.br:8080/jspui/handle/1/4839 |
Resumo: | Building reservoirs is a major cause of loss of biological diversity in floodplain. Diversity loss affects ecosystem processes and services, so it is fundamental to determine the factors that affect species diversity. Functional diversity (FD) is a mechanistic approach to determine the factors that influence the biological communities. The aim of this study was to evaluate the phytoplankton functional diversity of the Upper Paraná River and their associated lakes in the Upper Paraná River floodplain, downstream of a cascading of reservoirs. We tested the following hypothesis: i) DF is mainly influenced by the hydrological regime of the Paraná River; ii) there is a DF gradient along the stretch studied in the Upper Paraná River, being the highest values in the more distant stations from Porto Primavera reservoir. Quarterly samplings were carried in the Paraná River and associated lakes (between Porto Primavera and Itaipú reservoirs) in the years 2013 and 2014. DF was calculated by the Rao?s quadratic entropy, functional richness (FRic) and functional evenness (FEve). Principal Component Analysis (PCA) was performed to verify the environmental variability. The significance of the separation shown on axis was tested by Analysis of Variance (ANOVA). Multiple Linear regression was performed to investigate the predictors of DF. To determine which factors affect the structure of phytoplankton functional traits we carried out a Redundancy Analysis (RDA). The DF values were low in all stations and the models tested to the River showed significant correlation with total phosphorus. There were registered low FRic and FEve values, indicating less complementary niche and dominance traits maybe caused by biotic homogeneity, as a consequence of the reservoir cascade. In despite of the absence of significant differences between stations, the DF responded to gradient of productivity from Paraná River, with higher values in the most distant stations. Environmental conditions favorable for phytoplankton development in lentic environments provided high density values and dominance of functional traits. The traits dominance influenced low DF values. The influence of the Parana River on the DF of Lakes was evident due the lakes with lower connectivity had the lowest values, especially in higher fluviometric level. Reduction of connectivity between river and lakes due to alterations on the floods magnitude of Parana River, probably influenced the DF in these environments. |
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Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio ParanáInfluence on the functional diversity of phytoplankton in the upper Paraná River floodplain.Fitoplâncton de água doceProdutividade primáriaDiversidade funcionalPlanície de inundaçãoAlto rio ParanáBrasil.PhytoplanktonFloodplain lakesFunctional traitsRiversFloodplainUpper Paraná RiverBrazil.Ciências BiológicasEcologiaBuilding reservoirs is a major cause of loss of biological diversity in floodplain. Diversity loss affects ecosystem processes and services, so it is fundamental to determine the factors that affect species diversity. Functional diversity (FD) is a mechanistic approach to determine the factors that influence the biological communities. The aim of this study was to evaluate the phytoplankton functional diversity of the Upper Paraná River and their associated lakes in the Upper Paraná River floodplain, downstream of a cascading of reservoirs. We tested the following hypothesis: i) DF is mainly influenced by the hydrological regime of the Paraná River; ii) there is a DF gradient along the stretch studied in the Upper Paraná River, being the highest values in the more distant stations from Porto Primavera reservoir. Quarterly samplings were carried in the Paraná River and associated lakes (between Porto Primavera and Itaipú reservoirs) in the years 2013 and 2014. DF was calculated by the Rao?s quadratic entropy, functional richness (FRic) and functional evenness (FEve). Principal Component Analysis (PCA) was performed to verify the environmental variability. The significance of the separation shown on axis was tested by Analysis of Variance (ANOVA). Multiple Linear regression was performed to investigate the predictors of DF. To determine which factors affect the structure of phytoplankton functional traits we carried out a Redundancy Analysis (RDA). The DF values were low in all stations and the models tested to the River showed significant correlation with total phosphorus. There were registered low FRic and FEve values, indicating less complementary niche and dominance traits maybe caused by biotic homogeneity, as a consequence of the reservoir cascade. In despite of the absence of significant differences between stations, the DF responded to gradient of productivity from Paraná River, with higher values in the most distant stations. Environmental conditions favorable for phytoplankton development in lentic environments provided high density values and dominance of functional traits. The traits dominance influenced low DF values. The influence of the Parana River on the DF of Lakes was evident due the lakes with lower connectivity had the lowest values, especially in higher fluviometric level. Reduction of connectivity between river and lakes due to alterations on the floods magnitude of Parana River, probably influenced the DF in these environments.A construção de reservatórios é uma das principais causas de perda de diversidade biológica em planície de inundação, afetando os processos e serviços ecossistêmicos e portanto, determinar os fatores que afetam a diversidade de espécies é fundamental. A diversidade funcional (DF) permite uma aproximação mecanicista na tentativa de determinar os fatores que influenciam às comunidades biológicas. Os resultados avaliaram a DF fitoplanctônica do alto rio Paraná e de lagos associados, na planície de inundação do alto rio Paraná, a jusante de uma cascata de reservatórios e testar as seguintes hipóteses: i) A DF nos ambientes estudados é influenciada principalmente pelo regime hidrológico do rio Paraná; ii) ocorre um gradiente de DF ao longo do trecho estudado no alto rio Paraná, sendo os maiores valores esperados nas estações mais distantes do reservatório de Porto Primavera. Foram realizadas amostragens trimestrais no alto rio Paraná e lagos associados a este ao longo do eixo horizontal do rio Paraná, no último trecho livre de barragens, nos anos de 2013 e 2014. A DF foi calculada pela entropia quadrática de Rao, além da riqueza funcional (FRic) e a equitabilidade funcional (FEve). Foi realizada uma Análise de Componentes Principais (PCA) para verificar a variabilidade ambiental. A significância da separação mostrada nos eixos foi testada por uma análise de variância (ANOVA). Regressão Linear Múltipla foi realizada para investigar os preditores da DF. Os valores de DF foram baixos e os modelos testados para o rio mostraram relação significativa com o fósforo total. Foram registrados baixos valores de FRic e FEve, indicando menor complementariedade de nicho e dominância de traços, podendo ser causada pela homogeneidade biótica, sendo uma consequência da cascata de reservatórios. A despeito da ausência de diferenças significativas entre as estações, a DF respondeu ao gradiente de produtividade do rio, com maiores valores nos lagos mais distantes do reservatório. A influência do rio Paraná sobre a DF dos lagos foi evidenciada, pois os lagos com menor grau de conectividade apresentaram os menores valores, principalmente no período de maior nível fluviométrico. A redução da conectividade entre o rio e os ambientes adjacentes, provocada pela alteração da amplitude de cheias no rio Paraná, provavelmente influenciou a DF nesses ambientes.45 fUniversidade Estadual de MaringáBrasilPrograma de Pós-Graduação em Ecologia de Ambientes Aquáticos ContinentaisUEMMaringáDepartamento de BiologiaLuzia Cleide RodriguesLuiz Felipe Machado Velho - Nupélia/UEMFernanda Melo Carneiro - Universidade Estadual de Goiás (UEG)Paula, Aline Caroline Magro de2018-09-17T18:15:22Z2018-09-17T18:15:22Z2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://repositorio.uem.br:8080/jspui/handle/1/4839porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da Universidade Estadual de Maringá (RI-UEM)instname:Universidade Estadual de Maringá (UEM)instacron:UEM2018-09-17T18:15:22Zoai:localhost:1/4839Repositório InstitucionalPUBhttp://repositorio.uem.br:8080/oai/requestopendoar:2024-04-23T14:58:00.600742Repositório Institucional da Universidade Estadual de Maringá (RI-UEM) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio Paraná Influence on the functional diversity of phytoplankton in the upper Paraná River floodplain. |
title |
Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio Paraná |
spellingShingle |
Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio Paraná Paula, Aline Caroline Magro de Fitoplâncton de água doce Produtividade primária Diversidade funcional Planície de inundação Alto rio Paraná Brasil. Phytoplankton Floodplain lakes Functional traits Rivers Floodplain Upper Paraná River Brazil. Ciências Biológicas Ecologia |
title_short |
Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio Paraná |
title_full |
Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio Paraná |
title_fullStr |
Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio Paraná |
title_full_unstemmed |
Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio Paraná |
title_sort |
Influência de reservatórios sobre a diversidade funcional do fitoplâncton da planície de inundação do alto rio Paraná |
author |
Paula, Aline Caroline Magro de |
author_facet |
Paula, Aline Caroline Magro de |
author_role |
author |
dc.contributor.none.fl_str_mv |
Luzia Cleide Rodrigues Luiz Felipe Machado Velho - Nupélia/UEM Fernanda Melo Carneiro - Universidade Estadual de Goiás (UEG) |
dc.contributor.author.fl_str_mv |
Paula, Aline Caroline Magro de |
dc.subject.por.fl_str_mv |
Fitoplâncton de água doce Produtividade primária Diversidade funcional Planície de inundação Alto rio Paraná Brasil. Phytoplankton Floodplain lakes Functional traits Rivers Floodplain Upper Paraná River Brazil. Ciências Biológicas Ecologia |
topic |
Fitoplâncton de água doce Produtividade primária Diversidade funcional Planície de inundação Alto rio Paraná Brasil. Phytoplankton Floodplain lakes Functional traits Rivers Floodplain Upper Paraná River Brazil. Ciências Biológicas Ecologia |
description |
Building reservoirs is a major cause of loss of biological diversity in floodplain. Diversity loss affects ecosystem processes and services, so it is fundamental to determine the factors that affect species diversity. Functional diversity (FD) is a mechanistic approach to determine the factors that influence the biological communities. The aim of this study was to evaluate the phytoplankton functional diversity of the Upper Paraná River and their associated lakes in the Upper Paraná River floodplain, downstream of a cascading of reservoirs. We tested the following hypothesis: i) DF is mainly influenced by the hydrological regime of the Paraná River; ii) there is a DF gradient along the stretch studied in the Upper Paraná River, being the highest values in the more distant stations from Porto Primavera reservoir. Quarterly samplings were carried in the Paraná River and associated lakes (between Porto Primavera and Itaipú reservoirs) in the years 2013 and 2014. DF was calculated by the Rao?s quadratic entropy, functional richness (FRic) and functional evenness (FEve). Principal Component Analysis (PCA) was performed to verify the environmental variability. The significance of the separation shown on axis was tested by Analysis of Variance (ANOVA). Multiple Linear regression was performed to investigate the predictors of DF. To determine which factors affect the structure of phytoplankton functional traits we carried out a Redundancy Analysis (RDA). The DF values were low in all stations and the models tested to the River showed significant correlation with total phosphorus. There were registered low FRic and FEve values, indicating less complementary niche and dominance traits maybe caused by biotic homogeneity, as a consequence of the reservoir cascade. In despite of the absence of significant differences between stations, the DF responded to gradient of productivity from Paraná River, with higher values in the most distant stations. Environmental conditions favorable for phytoplankton development in lentic environments provided high density values and dominance of functional traits. The traits dominance influenced low DF values. The influence of the Parana River on the DF of Lakes was evident due the lakes with lower connectivity had the lowest values, especially in higher fluviometric level. Reduction of connectivity between river and lakes due to alterations on the floods magnitude of Parana River, probably influenced the DF in these environments. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016 2018-09-17T18:15:22Z 2018-09-17T18:15:22Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.uem.br:8080/jspui/handle/1/4839 |
url |
http://repositorio.uem.br:8080/jspui/handle/1/4839 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Estadual de Maringá Brasil Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais UEM Maringá Departamento de Biologia |
publisher.none.fl_str_mv |
Universidade Estadual de Maringá Brasil Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais UEM Maringá Departamento de Biologia |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da Universidade Estadual de Maringá (RI-UEM) instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
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Universidade Estadual de Maringá (UEM) |
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UEM |
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UEM |
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Repositório Institucional da Universidade Estadual de Maringá (RI-UEM) |
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Repositório Institucional da Universidade Estadual de Maringá (RI-UEM) |
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Repositório Institucional da Universidade Estadual de Maringá (RI-UEM) - Universidade Estadual de Maringá (UEM) |
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