Marine and Freshwater Research Marine and Freshwater Research Society
Advances in the aquatic sciences
RESEARCH ARTICLE

An inter-dependence of flood and drought: disentangling amphibian beta diversity in seasonal floodplains

Leonardo F. B. Moreira A D , Tainá F. Dorado-Rodrigues A , Vanda L. Ferreira B and Christine Strüssmann A C
+ Author Affiliations
- Author Affiliations

A Programa de Pós-Graduação em Ecologia e Conservação da Biodiversidade, Instituto de Biociências, Universidade Federal de Mato Grosso–UFMT, Avenida Fernando Corrêa da Costa, 2367, Boa Esperança, Cuiabá, Brazil.

B Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul–UFMS, Avenida Costa e Silva, s/n, Caixa Postal 549, Campo Grande, Brazil.

C Faculdade de Medicina Veterinária, Universidade Federal de Mato Grosso, UFMT, Avenida Fernando Corrêa da Costa, 2367, Boa Esperança, Cuiabá, Brazil.

D Corresponding author. Email: leonardobm@gmail.com

Marine and Freshwater Research - https://doi.org/10.1071/MF16391
Submitted: 29 November 2016  Accepted: 14 March 2017   Published online: 6 June 2017

Abstract

Species composition in floodplains is often affected by different structuring factors. Although floods play a key ecological role, habitat selection in the dry periods may blur patterns of biodiversity distribution. Here, we employed a partitioning framework to investigate the contribution of turnover and nestedness to β-diversity patterns in non-arboreal amphibians from southern Pantanal ecoregion. We investigated whether components of β-diversity change by spatial and environmental factors. We sampled grasslands and dense arboreal savannas distributed in 12 sampling sites across rainy and dry seasons, and analysed species dissimilarities using quantitative data. In the savannas, both turnover and nestedness contributed similarly to β diversity. However, we found that β diversity is driven essentially by turnover, in the grasslands. In the rainy season, balanced variation in abundance was more related to altitude and factors that induce spatial patterns, whereas dissimilarities were not related to any explanatory variable during dry season. In the Pantanal ecoregion, amphibian assemblages are influenced by a variety of seasonal constraints on terrestrial movements and biotic interactions. Our findings highlighted the role of guild-specific patterns and indicated that mass effects are important mechanisms creating amphibian community structure in the Pantanal.

Additional keywords: abundance matrix, null model, Pantanal, turnover, wetlands.


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