Assemblage of immature Odonata (Insecta, Anisoptera) in streams of the Mato Grosso do Sul State: spatial implications

Juliane A C Soares,Dayani Bailly,Milza C F Abelha,Daiane D Boneto,Valéria F Batista-Silva,Iana A D V De Oliveira

doi:10.1590/1678-476620151053325332

Juliane A C Soares, Dayani Bailly + Show 4 more

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https://doi.org/10.1590/1678-476620151053325332

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Abstract

ABSTRACT This study investigated the assemblages attributes (composition, abundance, richness, diversity and evenness) and the most representative genera of Odonata, Anisoptera at Água Boa and Perobão Streams, Iguatemi River basin, Brazil. Both are first order streams with similar length that are impacted by riparian forest removal and silting. Quarterly samplings were conducted from March to December 2008 in the upper, intermediate and lower stretch of each stream. The Mantel test was used to check the influence of spatial autocorrelation on the Odonata composition. Spatial variations in the composition were summarized by the Principal Coordinates Analysis (PCoA) using Mantel test residuals. The effects of spatial correlation on richness and abundance were investigated by the spatial correlogram of Moranʼs I coefficients. The most representative genera in each stream were identified by the Indicator Value Method. The spatial variations in the attributes of the assemblages were assessed using analysis of variance of null models. We collected 500 immature individuals of 23 genera and three families. Among the attributes analyzed only the composition and abundance showed significant spatial differences, with the highest mean abundance found in the Perobão Stream. Miathyria and Zenithoptera were the indicator genera of the Água Boa Stream and Erythrodiplax, Libellula, Macrothemis, Progomphus and Tramea were the indicator genera of the Perobão Stream.

Highlights

IntroductionEste trabalho investigou atributos de assembleias (composição, abundância, riqueza, diversidade e equitabilidade) e os gêneros mais representativos de Odonata, Anisoptera nos riachos Água Boa e Perobão, bacia do rio Iguatemi, MS, Brasil
This study investigated the assemblages attributes and the most representative genera of Odonata, Anisoptera at Água Boa and Perobão Streams, Iguatemi River basin, Brazil
Spatial variations in the composition were summarized by the Principal Coordinates Analysis (PCoA) using Mantel test residuals

Summary

Introduction

Este trabalho investigou atributos de assembleias (composição, abundância, riqueza, diversidade e equitabilidade) e os gêneros mais representativos de Odonata, Anisoptera nos riachos Água Boa e Perobão, bacia do rio Iguatemi, MS, Brasil. Immature individuals are longitudinally distributed along water bodies according to their ecological requirements (Assis et al, 2004; Remsburg & Turner, 2009) in search of food, oxygenated water and refuge (Corbet, 1980) These organisms are important functional components of aquatic ecosystems, with essential role in the food chain because they are predators at all life stages (Corbet, 1999; Carchini et al, 2007) and are preyed upon by fish, amphibians and reptiles (Souza & Costa, 2006). Environmental changes as removal of riparian forest can positively affect most species of Anisoptera since the majority is generalist and adapted to sites with higher solar incidence (Ferreira-Peruquetti & De Marco, 2002; Remsburg & Turner, 2009)

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