Egg-laying traits reflect shifts in dragonfly assemblages in response to different amount of tropical forest cover

Rodrigues, Marciel Elio, De Oliveira Roque, Fabio, Guillermo-Ferreira, Rhainer, Saito, Victor S., and Samways, Michael J. (2019) Egg-laying traits reflect shifts in dragonfly assemblages in response to different amount of tropical forest cover. Insect Conservation and Diversity, 12 (3). pp. 231-240.

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Oviposition site selection by aquatic insects is usually influenced by both aquatic and terrestrial cues. Landscape changes (e.g. native vegetation loss) can affect the level of the reproductive success in aquatic insects, changing local species composition and richness. We investigate whether forest cover loss around streams influences the number of species with exophytic (species which lay eggs directly on the water surface), endophytic (species which lay their eggs directly into plant tissue), or epiphytic (species which lay eggs on the exposed surface of rocks, leaves, trunks or other substrates protruding from the stream surface) oviposition behaviour in dragonfly assemblages. We sampled adult dragonflies in 116 streams in a Neotropical savanna region in Brazil. The relationship between species richness for each behavioural category, and the proportion of forest cover around the streams, was tested using regression analysis. We collected 2413 dragonfly (Anisoptera and Zygoptera) individuals, belonging to 8 families, 30 genera, and 63 species. Of these, 25 species were classified as exophytic, 28 as epiphytic, and 10 as endophytic. Our results show that the number of species with exophytic or epiphytic behaviour was strongly related to riparian forest loss. Forest loss changes the habitat, and here, specifically changes site suitability for oviposition. We highlight the importance of using behavioural traits as a bioindicator tool for the assessment of anthropogenic impacts on tropical forest.

Item ID: 61836
Item Type: Article (Research - C1)
ISSN: 1752-4598
Keywords: behavioural traits, bioindicators, Brazil, forest cover loss, Odonata, oviposition behaviour
Copyright Information: © 2018 The Royal Entomological Society.
Funders: "Redes de redes: interações ecológicas e suas implicações para gestão de biodiversidade" (RdR), CAPES, MER, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CNPq, São Paulo Research Foundation (FAPESP), Mondi Group
Projects and Grants: RdR Grant No. FUNDECT‐ n° 23/200.578/2012, CAPES Grant Numbers: FUNDECT 44/2014, n° 88887.103417/2015‐01, MER Grant Number: n° 1171579, CNPq Grant Number: 09908/2013‐2
Date Deposited: 25 May 2020 19:26
FoR Codes: 41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410401 Conservation and biodiversity @ 100%
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