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Delineating Ecological Boundaries of Hanuman Langur Species Complex in Peninsular India Using MaxEnt Modeling Approach

Nag, C and Karanth, Praveen K and Gururaja, KV (2014) Delineating Ecological Boundaries of Hanuman Langur Species Complex in Peninsular India Using MaxEnt Modeling Approach. In: PLoS ONE, 9 (2). e87804.

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Official URL: http://dx.doi.org/10.1371/journal.pone.0087804

Abstract

Hanuman langur is one of the widely distributed and extensively studied non-human diurnal primates in India. Until recently it was believed to be a single species - Semnopithecus entellus. Recent molecular and morphological studies suggest that the Hanuman langurs consists of at least three species S. entellus, S. hypoleucos and S. priam. Furthermore, morphological studies suggested that both S. hypoleucos and S. priam have at least three subspecies in each. We explored the use of ecological niche modeling (ENM) to confirm the validity of these seven taxa and an additional taxon S. johnii belonging to the same genus. MaxEnt modeling tool was used with 19 bioclimatic, 12 vegetation and 6 hydrological environmental layers. We reduced total environmental variables to 14 layers after testing for collinearity and an independent test for model prediction was done using ENMTools. A total of 196 non-overlapping data points from primary and secondary sources were used as inputs for ENM. Results showed eight distinct ecological boundaries, corroborating the eight taxa mentioned above thereby confirming validity of these eight taxa. The study, for the first time provided ecological variables that determined the ecological requirements and distribution of members of the Hanuman langur species complex in the Indian peninsula.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the authors.
Department/Centre: Division of Biological Sciences > Centre for Ecological Sciences
Division of Biological Sciences > Central Animal Facility (Formerly Primate Research Laboratory)
Division of Mechanical Sciences > Centre for Earth Sciences
Division of Mechanical Sciences > Divecha Centre for Climate Change
Depositing User: Dr Gururaja KV Acharya
Date Deposited: 05 Feb 2014 12:24
Last Modified: 05 Feb 2014 12:26
URI: http://eprints.iisc.ac.in/id/eprint/48335

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