Efeitos espaciais e ambientais sobre diferentes medidas de diversidade beta em ecossistemas continentais
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Data
2023-10-30
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Universidade Federal de Goiás
Resumo
It has been many years since the term beta diversity has been the subject of discussion and application
in Ecology studies, and apparently its methodological approaches and applications seems to be
inexhaustible, as different measures of beta diversity have emerged over the years. The first chapter
of this thesis is a systematic review in which I investigated whether the amplitude of environmental
differences is responsible for influencing effect sizes in studies that assessed the relationship between
beta dissimilarity and environmental variables in freshwater environments. According to the results
obtained, the amplitude does not seem to influence effect sizes. In the second chapter I investigate
whether dispersal costs effects in lotic metacommunities are responsible for determining the beta
dissimilarity of fishes. The results revealed the influence of dispersal costs associated with distances
between locations along rivers and streams for three basins, while dispersal costs represented by the
combination of distances and channel slope were only observed in a single basin. Furthermore, for
one of the river basins, the influence of dispersal costs was represented by mutual effects of the
distance between locations and the total area of reservoirs formed by dams between locations. In the
third chapter I investigate whether the latitudinal gradient is responsible for influencing the
relationships between environmental differences and beta dissimilarity obtained in square cell format
for the entire continent of America using records of distribution of terrestrial birds and mammals.
Beta dissimilarity in both terrestrial birds and mammals was explained by environmental variables,
but only the relationship between environmental differences and beta diversity of mammals appears
to be influenced by latitudinal patterns.
Descrição
Palavras-chave
Diversidade beta , Meta-análise , Padrões de gradiente latitudinal , Diversidade funcional , Custos de dispersão , Amplitude de variáveis ambientais , Ambientes de água doce , Beta diversity , Meta-analysis , Latitudinal gradient patterns , Functional diversity , Costs of dispersal , Environmental variables extent , Freshwater environments
Citação
REZENDE, B. L. M. Efeitos espaciais e ambientais sobre diferentes medidas de diversidade beta em ecossistemas continentais. 2023. 110 f. Tese (Doutorado em Ecologia e Evolução) - Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, 2023.