Drivers of seasonal dynamics of phytoplankton community in subtropical streams: a study case
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Data
2017
Autores
Servat, Liliane Caroline
Sébastien, Nyamien Yahaut
Bortolini, Jascieli Carla
Bueno, Norma Catarina
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Resumo
Despite the importance of phytoplankton as a
source of autochthonous organic carbon, only a few studies
have explored the ecological determinants of phytoplankton community structure in lotic systems when compared
with studies in lakes. Thus, the aim of this study was to
assess the seasonal phytoplankton dynamics in two distinct
streams located in an area of environmental protection in
subtropical Brazil, and to identify the main drivers of
community structure. Phytoplankton community and
environmental variables were sampled on a monthly basis,
between September 2012 and August 2013, in Apepu and
Gualberto streams, located in Foz do Iguac¸u, Parana´,
Brazil. We verified that both streams presented a seasonal
distinction regarding the precipitation levels. Regarding the
others environmental variables (e.g., nutrients, light, temperature), a temporal similarity was observed in both
streams. A high taxonomic diversity was recorded,
including Bacillariophyceae, Euglenophyceae, Chlorophyceae and Zygnematophyceae as the most representative
groups. Low abundance, richness and diversity were recorded in Apepu and Gualberto streams, while high
equitability was recorded in both streams due to the uniform distribution of the species. Low variability of phytoplankton was recorded with high temporal similarity
between the two streams. This study shows that the factors
determining phytoplankton diversity and dynamics in
Apepu and Gualberto streams are related not only to
hydrological and limnological conditions, but also to the
local characteristics of the streams, such as low depth and
small extension.
Descrição
Palavras-chave
Environmental variability, Sazonality, Lotic systems, Potamoplankton
Citação
SERVAT, Liliane Caroline et al. Drivers of seasonal dynamics of phytoplankton community in subtropical streams: a study case. Brazilian Journal of Botany, São Paulo, v. 40, p. 727-734, 2017. DOI: 10.1007/s40415-017-0379-y. Disponível em: https://link.springer.com/article/10.1007/s40415-017-0379-y. Acesso em: 12 jun. 2023.