Metacommunity patterns of Amazonian Odonata: the role of environmental gradients and major rivers
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2019
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Background. We identified and classified damselfly (Zygoptera) and dragonfly
(Anisoptera) metacommunities in Brazilian Amazonia, relating species distribution
patterns to known biological gradients and biogeographical history. We expected a
random distribution of both Zygoptera and Anisoptera within interfluves. At the
Amazonian scale, we expected Anisoptera metacommunities to be randomly distributed
due to their higher dispersal ability and large environmental tolerance. In contrast, we
expected Zygoptera communities to exhibit a Clementsian pattern, limited by the large
Amazonia rivers due to their low dispersal ability.
Methods. We used a dataset of 58 first-to-third order well-sampled streamlets in four
Amazonian interfluves and applied an extension of the Elements of Metacommunity
Structure (EMS) framework, in which we order Zygoptera and Anisoptera metacommunities
by known spatial and biogeographic predictors.
Results. At the Amazonian scale, both Zygoptera and Anisoptera presented a
Clementsian pattern, driven by the same environmental and biogeographical predictors,
namely biogeographic region (interfluve), annual mean temperature, habitat
integrity and annual precipitation. At the interfluve scale, results were less consistent
and only partially support our hypothesis. Zygoptera metacommunities at Guiana and
Anisoptera metacommunities at Tapajós were classified as random, suggesting that
neutral processes gain importance at smaller spatial scales.
Discussion. Our findings were consistent with previous studies showing that environmental
gradients and major rivers limit the distribution of Odonata communities,
supporting that larger Amazonian rivers act as barriers for the dispersal of this group.
In addition, the importance of habitat integrity indicates that intactness of riparian
vegetation is an important filter shaping metacommunity structure of Amazonian
stream Odonata.
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Amazonia biogeographical regions, Macroclimate, Zygoptera, Habitat integrity, Clementsian distributions, Anisoptera
Citação
ALVES-MARTINS, Fernanda; BRASIL, Leandro Schlemmer; JUEN, Leandro; MARCO JR, Paulo De; STROPP, Juliana; HORTAL, Joaquín. Metacommunity patterns of Amazonian Odonata: the role of environmental gradients and major rivers. PeerJ, Corte Madera, v. 7, e6472, 2019. DOI: 10.7717/peerj.6472. eCollection 2019. Disponível em: https://pubmed.ncbi.nlm.nih.gov/31119064/. Acesso em: 9 fev. 2023.