Environmental impacts from human activities affect the diversity of the Odonata (Insecta) in the Eastern Amazon

  • Written by R. C. Bastos, Joás Brito, Erlane Cunha, G. M. Cruz, J.L.S. Pereira, J. Vieira, Leandro Juen
  • International Journal of Odonatology
  • volume: 24 (2021)
  • Article
  • PDF
  • 300–315 pp.
  • Release date: 2021-11-18
  • doi: 10.23797/2159-6719_24_22

Keywords: Freshwater systems, Anisoptera, environmental integrity, human occupation, industrial impacts, Zygoptera, Barcarena

Article (Bastos)

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International Journal of Odonatology 24 (2021)

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Description

Land use influences the biodiversity of stream systems by changing the chemical composition of the water and the physical structure of the habitat. The present study evaluated the influence of these processes on the diversity metrics of Odonata at regional and local scales, testing the hypothesis that the two odonate suborders Anisoptera and Zygoptera will respond differently to habitat and landscape variables. The study focused on 13 sites in the municipality of Barcarena, Pará, Brazil. We found no significant impact from regional factors, although anisopterans were more affected by water temperature and Habitat Integrity Index (HII). The HII indicated that the local forest was stable, but anisopteran richness was negatively correlated with HII. It was indicating that these species favoured open areas with less riparian cover. Even though zygopterans did not exhibit a similar systematic pattern, the reduced abundance of Chalcopteryx rutilans, a species associated with better-preserved habitats, may indicate that some sites lack the habitat integrity necessary to establish populations of this species. These findings highlight the importance of preserving the riparian forest to maintain the health of the stream systems. We recommend more studies that focus on the broader geographic and temporal scales to account for factors such as the anthropogenic gradient and historical land use patterns.

R. C. Bastos

Graduate Program in Ecology, Federal Universidade Federal do Pará, Rua Augusto Correia, Nº 1, Bairro Guamá,
CEP: 66.075-110, Belém, Pará, Brazil.
bastosrc.bio@gmail.com

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Joás Brito

Graduate Program in Ecology, Federal University of Pará, Belém, Brazil

jotabio13@gmail.com

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Erlane Cunha

Laboratory of Ecology and Conservation, Federal University of Pará, Belém, Brazil

erlanejcunha@gmail.com

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G. M. Cruz

Graduate Program in Ecology, Federal Universidade Federal do Pará, Rua Augusto Correia, Nº 1, Bairro Guamá,
CEP: 66.075-110, Belém, Pará, Brazil.

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J.L.S. Pereira

Graduate Program in Ecology, Federal Universidade Federal do Pará, Rua Augusto Correia, Nº 1, Bairro Guamá,
CEP: 66.075-110, Belém, Pará, Brazil.

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J. Vieira

Graduate Program in Ecology, Federal Universidade Federal do Pará, Rua Augusto Correia, Nº 1, Bairro Guamá,
CEP: 66.075-110, Belém, Pará, Brazil.

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Leandro Juen

Laboratory of Ecology and Conservation, Federal University of Pará, Belém, Brazil

leandrojuen@gmail.com

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