Phytoplankton richness and abundance in response to seasonality and spatiality in a tropical reservoir
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Data
2021
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Resumo
Species richness and abundance are important elements in understanding
communities’ dynamics. In this way we evaluated the spatial and temporal variation of phytoplankton
richness and density in a tropical reservoir, and its main drivers. We tested whether the temporal
variability of the hydrological cycle influences the phytoplankton, in addition to testing the main
environmental variables that influence richness and density. Methods: Data from environmental
variables and phytoplankton were sampled in different regions of João Leite reservoir, Goiás, Brazil,
during a dry and rainy period, and were analyzed by Principal Component Analysis, Student’s t-test
and Bioenv. Results: We recorded distinct environmental scenarios between the dry and rainy period,
with temporal differences in richness. Sixty-two taxa were recorded, with cyanobacterial predominance
in both hydrological periods and in the lentic reservoir regions. Water temperature, pH, electrical
conductivity, dissolved oxygen, turbidity, and nutrient concentrations were the main drivers of
phytoplankton richness and density in our study. Conclusions: The richness and abundance of
species directly reflect the determining factors in the structure of communities, generating important
information about ecosystem functions. Therefore, understanding the environmental variability on
phytoplankton richness and abundance in tropical reservoirs is essential, since the construction of
reservoirs influences aquatic biodiversity and the provision of ecosystem services.
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Brazil, Brasil, Barragem, Dam, Diversidade, Represamento, Algas planctônicas, Diversity, Impoundment, Planktonic algae
Citação
MOURA, Lyza Christine dos Santo et al. Phytoplankton richness and abundance in response to seasonality and spatiality in a tropical reservoir. Acta Limnologica Brasiliensia, Rio Claro, v. 33, e13, 2021.