Atributos funcionais não estão correlacionados com sincronia em uma comunidade fitoplanctônica
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2020-02-28
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Universidade Federal de Goiás
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Species abundance in a local community can be correlated over time. Similarly, the
abundance of different local populations of a given species can vary synchronously. The
study of these patterns, known as interspecific synchrony and population synchrony,
respectively, may indicate the relative importance of interspecific interactions,
environmental filters (at different spatial scales) and dispersal processes on the temporal
dynamics of populations and communities. In addition, studies have sought to test
whether the levels of synchrony (interspecific and population) are related to functional
traits. For example, functionally similar species should have correlated dynamics under
the effect of a strong environmental filter. As another example, a specialist species should
have higher levels of population synchrony than a generalist species. Thus, in the first
chapter of this dissertation, we used data on phytoplankton functional traits to test whether
the level of interspecific synchrony between pairs of species is dependent on the
functional dissimilarity between them. In addition, we tested whether the increase in
functional diversity would influence community synchrony, which in turn, could affect
community stability. In the second chapter, we tested whether specialist taxa would have
greater spatial synchrony than generalists. For both chapters, we used a dataset on
phytoplankton community in the Cana Brava Reservoir (Goiás State, Brazil). Our
hypotheses were not supported by the results. However, in the first chapter, we found a
predominance of positive correlations between species abundances, a result that indicates
the importance of environmental filters. In the second chapter, the low values of
population synchrony suggest that regional environmental factors were not strong enough
to control population dynamics. In general, we suggest that future studies should test a
similar set of traits to test the generality of correlates of synchrony.
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SILVA, M. N. Atributos funcionais não estão correlacionados com sincronia em uma comunidade fitoplanctônica. 2020. 69 f. Dissertação (Mestrado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2020.