Data from: Modeling the distribution and environmental preferences of the Ladakh urial in the arid Himalayas
Data files
Oct 08, 2024 version files 15.10 KB
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README.md
1.08 KB
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Urial_Locations_Ecology_and_Evolution_2024-10-07.xlsx
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Abstract
Mountains play a crucial role in shaping the climate of an area and subsequently, the environments and species that are suited to those particular conditions. Understanding the relationships between environmental conditions and their influence on the occurrence of a species is necessary to make informed decisions when conserving relevant habitats. This study evaluated and compared the potential for different interactions between climatic variables to describe the environmental preferences and the range of the Ladakh urial, a narrowly distributed sub-species of Ovis vignei, in the arid Himalayas. Species distribution models were created from spatially thinned presence-only occurrence data of 50 locations using a Maximum Entropy (Maxent) model. For this, we subdivided the modeled distribution into environmental categories with varying degrees of suitability. We identified a high cold precipitation to annual precipitation ratio typical of cold desert climates well suited to describe the highest quality environments for urial. The inverse, low warm precipitation to annual precipitation ratio was found to better describe the urial’s range at the lower end of potential habitat. In this comparison, we observed that with the exclusion of unsuitable cold steppe habitat with a higher warm precipitation to annual precipitation ratio, we were able to refine the extent of this species range but at a trade-off to the accurate description of high quality environments. This study demonstrated the strong potential of cold arid climatic conditions to describe the distribution of urial in India which have implications for identifying important areas for the conservation and management of the species in the high altitude rangelands of Ladakh.
README: Distribution of Ladakh Urial in Western Himalayas
https://doi.org/10.5061/dryad.cjsxksnfp
Urial Location Data
The Ladakh urial presence-only occurrence data were collected through visual surveys and recorded as decimal degree coordinates. Spatial thinning using the R package spThin eliminated locations within a prescribed distance of one another (Aiello-Lammens et al., 2015; R Core Team, 2021).
Descriptions
- All_Lat: all occurrence latitudes
- All_Long: all occurrence longitudes
- SPEC: Ladakh Urial
- Lat: spatially thinned occurrence latitudes
- Long: spatially thinned occurrence longitudes
References
Aiello-Lammens, M. E., Boria, R. A., Radosavljevic, A., Vilela, B. (2015). “spThin: an R package for spatial thinning of species occurrence records for use in ecological niche models.” Ecography, 38(5), 541–545.
R Core Team (2021). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. URL https://www.R-project.org/.