Distribuição espacial da comunidade zooplanctônica em um lago raso: importância das macrófitas aquáticas como fator de heterogeneidade ambiental
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Data
2024-12-06
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Universidade Federal de Goiás
Resumo
Several ecological studies seek to understand the factors that structure aquatic
communities, such as abiotic characteristics and the presence of aquatic macrophytes,
which increase spatial heterogeneity. This study aimed to analyze the spatial distribution
and structuring factors of the zooplankton community of a shallow lake located at the
Federal University of Goiás – Samambaia Campus. Collections were carried out at 11
points in the Samambaia lake in July 2023, during the dry season. At each sampling point,
some environmental parameters were measured, such as water temperature, electrical
conductivity, turbidity, pH, dissolved oxygen, and nutrient concentrations (total
phosphorus, orthophosphate, nitrate, and ammonia nitrogen). Simultaneously, we also
collected samples of zooplankton organisms. A total of 80 zooplankton taxa were
recorded, represented mainly by testate amoebae (41.25%), rotifers (38.75%),
cladocerans (18.75%) and copepods (1.25%). We observed greater richness and density
of testate amoebae taxa in the littoral region, while rotifers predominated in the limnetic
region. The sampling points located in the littoral region presented changes in the
composition and density of taxa, compared to the limnetic region, mainly when the points
were colonized by aquatic macrophytes. Despite a difference in abiotic conditions
between the littoral and limnetic regions, the main factor that explained the change in the
structure of the zooplankton communities was the presence of aquatic macrophytes,
increasing the spatial heterogeneity of the lake.
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Zooplâncton, Região litorânea, Região limnética, Variação espacial, Zooplankton, Littoral region, Limnetic region, Spatial variation
Citação
FERREIRA, Naya’h Soares Pestana. Distribuição espacial da
comunidade zooplanctônica em um lago raso: importância das
macrófitas aquáticas como fator de heterogeneidade ambiental.
2024. 39 f. Trabalho de Conclusão de Curso (Bacharelado em
Ecologia e Análise Ambiental) – Instituto de Ciências Biológicas,
Universidade Federal de Goiás, Goiânia, 2024.