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Thai limestone karsts : an impending biodiversity crisis
Auteur(s) : Latinne, Alice Waengsothorn, Surachit Herbreteau, Vincent Michaux, Johan R.
Auteurs secondaires : Institut de Botanique ; Université de Liège Thailand Institute of Scientific and Technological Research (TISTR) ; Thailand Institute of Scientific and Technological Research Animal et gestion intégrée des risques (Agirs) ; Centre de coopération internationale en recherche agronomique pour le développement [CIRAD] Espace pour le Développement (ESPACE-DEV) ; Université Montpellier 2 - Sciences et Techniques (UM2) - Université des Antilles et de la Guyane (UAG) - Institut de recherche pour le développement [IRD] - Université de la Réunion Centre de biologie et gestion des populations (CBGP) ; Institut national de la recherche agronomique (INRA) - Institut de recherche pour le développement [IRD] - Centre de coopération internationale en recherche agronomique pour le développement [CIRAD] - Université Montpellier 2 - Sciences et Techniques (UM2)

Éditeur(s) : HAL CCSD Thai Society of Higher Education Institutes on Environment
Résumé : International audience
Due to the high level of endemic species that they support and the high threats they are facing, such as unsustainable limestone quarrying, hunting and urbanization, limestone karsts are recognized as biodiversity hotspots needing urgent protection. The first aim of our study was to investigate the mammal rodent diversity of Thai limestone karsts. Our second aim was to examine the diversity at a finer scale than the species level (intraspecific biodiversity) using phylogeographic approaches. Therefore, we studied the phylogeographic structure of a threatened rodent, endemic to limestone karsts of Thailand, the Murinae Leopoldamys neilli. We sampled 76 limestone karsts in whole Thailand and live-trapped 444 rodents including 115 Leopoldamys neilli. Our study revealed an important rodent diversity in Thai limestone karsts. Besides endemic rodent species, karsts also host typical forest species to which they provide forest refugia in deforested regions. At the intraspecific level, our study revealed an unexpected high level of genetic differentiation within the rodent species L. neilli. As each limestone area of Thailand is characterized by a particular genetic lineage of L. neilli, the destruction of these karsts would lead to the disappearance of unique intraspecific strains not found elsewhere. Our results highlight the importance of protecting limestone habitats to preserve not only their interspecific but also intraspecific rodent diversity that is highly threatened as more than 20% of limestone karsts in Thailand have already been quarried. Management plans of limestone, a non-renewable resource, should urgently take into account this high biological importance of karsts.
The 1st EnvironmentAsia International Conference on "Environmental Supporting in Food and Energy Security: Crisis and Opportunity"
Bangkok, Thailand

ird-00714455
http://hal.ird.fr/ird-00714455
http://hal.ird.fr/ird-00714455/document
IRD : fdi:010056152

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