O papel do ambiente, espaço e uso de solo sobre a estruturação da composição funcional e taxonômica de comunidades fitoplanctônicas e zooplanctônicas em reservatórios tropicais
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2016-02-26
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Universidade Federal de Goiás
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One of the main focuses of ecology and biogeography has been better understanding as
historical factors, environmental factors and dispersal ability influence the pattern of species
distribution. Besides the environmental conditions and space being considered important
components to control the variation in communities, another factor that can influence the beta
diversity, but has been little studied, is the land use type. We aimed determine the relative
influence of local, spatial components (directional and non-directional) and land use in the
taxonomic and functional composition of phytoplankton and zooplankton communities in tropical
reservoirs. Data was collected in 25 sampling points in reservoirs in the Rio Preto Basin, which is
located in the Federal District-DF, Brazil. We performed a partial redundancy analysis to
determine the influence of each component. The space was the only component with significant
influence over the two groups (phytoplankton and zooplankton) and both approaches. Local
variables had no significant influence on the variation of the communities, as well as the land use.
Given the importance of space in the analyzed communities, we applied a protocol based on an spatial autocorrelation analysis, which indicated that the spatial pattern of the communities could
be purely associated with dispersal by neutral factors. Our results demonstrated that the spatial
component can be significant even in small scale studies to organisms with passive dispersal.
Furthermore, it is important consider the connectivity among the environments in investigations
with these microorganisms. as well as the use of the functional approach for studies of planktonic
distribution, because of it show patterns similar to those found in the taxonomic approach.
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ROCHA, B. S. O papel do ambiente, espaço e uso de solo sobre a estruturação da composição funcional e taxonômica de comunidades fitoplanctônicas e zooplanctônicas em reservatórios tropicais. 2016. 40 f. Dissertação (Mestrado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2016.