Species and site contributions to Odonata adult assemblage uniqueness in Brazilian Amazon streams

Understanding mechanisms responsible for variation in species composition between sites is essential for identifying priority areas for conservation or restoration. This variation may be related to environmental, spatial, and life history factors. Adult Odonata, which connect aquatic and terrestrial habitats, are often used to test hypotheses about species diversity along environmental gradients. Therefore, we evaluated Species contributions to beta-diversity (SCBD) and Local contributions to beta-diversity (LCBD) of dragonflies and damselflies (Odonata) along environmental and spatial gradients. We investigated the influence of the Habitat Integrity Index (HII) on the uniqueness of species composition, expecting streams with high integrity to have high LCBD of Zygoptera, because Zygoptera will represent the majority of the species associated with habitat integrity. In addition, relationship LCBD with species richness and dominance, and SCBD with abundance and occupancy. Adult Odonata were sampled in 117 streams in the Brazilian Amazon. We measured stream environmental variables width, channel depth, water temperature, electrical conductivity, dissolved oxygen, pH and HII. Our hypothesis that streams with greater habitat integrity would have greater LCBD in terms of Zygoptera species was not confirmed. Streams with high contributions to diversity showed high variation in Zygoptera species in lower HII streams. In relation to SCBD, species with high contributions to diversity were the most abundant and occupied between sites. Our results suggest that the streams with high contributions to diversity may be priorities for environmental restoration, given the relationship between uniqueness of Zygoptera species composition and habitat integrity.

• Publication year

  2025

• Venue

  Journal of Insect Conservation

• Publication date

  2025-01-30

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1007/s10841-025-00650-2
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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