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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Spatial heterogeneity and habitat configuration overcome habitat composition influences on alpha and beta mammal diversity
Author(s): Regolin, Andre Luis
Ribeiro, Milton Cezar
Martello, Felipe
Melo, Geruza Leal
Sponchiado, Jonas
Campanha, Luis F de Castro
Sugai, Larissa Sayuri Moreira
Silva, Thiago Sanna Freire
Caceres, Nilton Carolos
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Keywords: biodiversity conservation
habitat modeling
habitat quality
image texture
Mato Grosso do Sul
species losses
Issue Date: 11-May-2020
Citation: Regolin AL, Ribeiro MC, Martello F, Melo GL, Sponchiado J, Campanha LFdC, Sugai LSM, Silva TSF & Caceres NC (2020) Spatial heterogeneity and habitat configuration overcome habitat composition influences on alpha and beta mammal diversity. Biotropica.
Abstract: The effects of habitat fragmentation on different taxa and ecosystems are subject to intense debate, and disentangling them is of utmost importance to support conservation and management strategies. We evaluated the importance of landscape composition and configuration, and spatial heterogeneity to explain α‐ and β‐diversity of mammals across a gradient of percent woody cover and land use diversity. We expected species richness to be positively related to all predictive variables, with the strongest relationship with landscape composition and configuration, and spatial heterogeneity respectively. We also expected landscape to influence β‐diversity in the same order of importance expected for species richness, with a stronger influence on nestedness due to deterministic loss of species more sensitive to habitat disturbance. We analyzed landscape structure using: (a) landscape metrics based on thematic maps and (b) image texture of a vegetation index. We compared a set of univariate explanatory models of species richness using AIC, and evaluated how dissimilarities in landscape composition and configuration and spatial heterogeneity affect β‐diversity components using a Multiple Regression on distance Matrix. Contrary with our expectations, landscape configuration was the main driver of species richness, followed by spatial heterogeneity and last by landscape composition. Nestedness was explained, in order of importance, by spatial heterogeneity, landscape configuration, and landscape composition. Although conservation policies tend to focus mainly on habitat amount, we advocate that landscape management must include strategies to preserve and improve habitat quality and complexity in natural patches and the surrounding matrix, enabling landscapes to harbor high species diversity.
DOI Link: 10.1111/btp.12800
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Notes: Output Status: Forthcoming/Available Online

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