Distribution of periphytic algae in wetlands (Palm swamps, Cerrado), Brazil
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2013-05
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Resumo
The distribution of periphytic algae communities depends on various factors such as type of substrate, level of
disturbance, nutrient availability and light. According to the prediction that impacts of anthropogenic activity provide
changes in environmental characteristics, making impacted Palm swamps related to environmental changes such as
deforestation and higher loads of nutrients via allochthonous, the hypothesis tested was: impacted Palm swamps have
higher richness, density, biomass and biovolume of epiphytic algae. We evaluated the distribution and structure of
epiphytic algae communities in 23 Palm swamps of Goiás State under different environmental impacts. The community
structure attributes here analyzed were composition, richness, density, biomass and biovolume. This study revealed the
importance of the environment on the distribution and structuration of algal communities, relating the higher values
of richness, biomass and biovolume with impacted environments. Acidic waters and high concentration of silica
were important factors in this study. Altogether 200 taxa were identified, and the zygnemaphycea was the group most
representative in richness and biovolume, whereas the diatoms, in density of studied epiphyton. Impacted Palm swamps
in agricultural area presented two indicator species, Gomphonema lagenula Kützing and Oedogonium sp, both related
to mesotrophic to eutrophic conditions for total nitrogen concentrations of these environments.
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Águas ácidas, Ação antrópica, Ecologia, Epifíton, Acidic water, Anthropogenic activity, Ecology, Epiphyton
Citação
DUNCK, B.; NOGUEIRA, I. S.; FELISBERTO, S. A. Distribution of epiphytic algae in wetlands (Palm swamps, Cerrado), Brazil. Brazilian Journal of Biology, São Carlos, v. 73, n. 2, p. 331-346, May 2013.