Drivers of phytoplankton richness and diversity components in Neotropical floodplain lakes, from small to large spatial scales
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2017
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Understanding the distribution patterns of
species and how spatial and environmental factors
drive the structure of communities is crucial to the
preservation of biodiversity. We evaluate, during the
low and high water periods, the phytoplankton diversity in lakes of four Brazilian floodplain systems
(FPs): Amazon, Araguaia, Pantanal, and Parana´. We
hypothesized that (i) species variation/replacement
among floodplains (b2) is the predominant mechanism
in shaping phytoplankton gamma diversity; (ii) the
variation in phytoplankton taxonomic composition
within each floodplain (b1) is mainly governed by
local environmental conditions due to the high
dispersal ability of phytoplankton at small spatial scales; and (iii) variation in the phytoplankton taxonomic composition among floodplains (b2) is mainly
influenced by dispersal limitation. Variation partitioning was used to evaluate the influence of spatial and
environmental factors on species richness. Higher c
diversity was found in the Araguaia and Amazon FPs.
The high contribution of b2 (large scale) to c diversity
revealed the high degree of environmental heterogeneity in each floodplain. b1 (small scale) was more
influenced by environmental variables, and b2 by both
spatial and environmental factors. Our findings
showed that c diversity was explained by the interaction between the two factors, and that these processes
influencing variation were scale dependent.
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Dispersal, Shallow lakes, Phycobiogeography, Microorganisms
Citação
MORESCO, Geovani Arnhold et al. Drivers of phytoplankton richness and diversity components in Neotropical floodplain lakes, from small to large spatial scales. Hydrobiologia, Berlim, v. 799, p. 203-2015, 2017. DOI: 10.1007/s10750-017-3214-3 Disponível em: https://link.springer.com/article/10.1007/s10750-017-3214-3. Acesso em: 12 jun. 2023.