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Islam, M., Sahana, M., Areendran, G., Jamir, C., Raj, K., Sajjad, H. |
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Title |
Prediction of potential habitat suitability of snow leopard (Panthera uncia) and blue sheep (Pseudois nayaur) and niche overlap in the parts of western Himalayan region |
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2023 |
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Geo: Geography and Environment |
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10 |
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e00121 |
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1-15 |
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bioclimatic variables, habitat suitability, MaxEnt model, niche overlap, western Himalayan region |
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Abstract |
The snow leopard (Panthera uncia) and blue sheep (Pseudois nayaur) are the inhabitants of remote areas at higher altitudes with extreme geographic and climatic conditions. The habitats of these least-studied species are crucial for sustaining the Himalayan ecosystem. We employed the Maximum Entropy (MaxEnt) species distribution model to predict the potential habitat suitability of snow leopards and blue sheep and extracted common overlapped niches. For this, we utilised presence location, bio-climatic and environmental variables, and correlation analysis was applied to reduce the negative impact of multicollinearity. A total of 134 presence locations of snow leopards and 64 for blue sheep were selected from the Global Biodiversity Information Facility (GBIF). The annual mean temperature (Bio1) was found to be the most useful and highly influential factor to predict the potential habitat suitability of snow leopards. Annual mean temperature, annual precipitation and isothermality were the major influencing factors for blue sheep habitat suitability. Highly influential bio-climatic, topographic and environmental variables were integrated to construct the model for predicting habitat suitability. The area under the curve (AUC) values for snow leopard (0.87) and blue sheep (0.82) showed that the models are under good representation. Of the total area investigated, 47% was suitable for the blue sheep and 38% for the snow leopards. Spatial habitat assessment revealed that nearly 11% area from the predicted suitable habitat class of both species was spatially matched (overlapped), 48.6% area was unsuitable under niche overlap and 40.5% area was spatially mismatched niche. The presence of snow leopards and blue sheep in some highly suitable areas was not observed, yet such areas have the potential to sustain these elusive species. The other geographical regions interested in exploring habitat suitability may find the methodological framework adopted in this study useful for formulating an effective conservation policy and management strategy. |
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SLN @ rakhee @ |
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1719 |
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Author |
Fox, J.L. |
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Title |
An Annotated Bibliography of Literature on the Snow Leopard |
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Book Whole |
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1989 |
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bibliography; status; distribution; browse; 3100 |
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Usa |
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SLN @ rana @ 138 |
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295 |
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Author |
Gee, E.P. |
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Title |
Occurrence of the snow leopard Panthera uncia (Schreber) in Bhutan |
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1967 |
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Journal of the Natural History Museum Society |
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30 |
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634-636 |
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Bhutan; status; distribution; browse; 2350 |
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Indicates that snow leopard range includes all of Northern Bhutan |
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SLN @ rana @ 18 |
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335 |
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Mongar, T.B. |
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Title |
Protected Area System Network: A Strategy for Managing Biodiversity in Bhutan |
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1992 |
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Bhutan; parks; reserves; park; reserve; refuge; protected-area; browse; protected; area; 2430 |
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Title, Monographic: Fourth World Parks Congress
Place of Meeting: Caracas, Venezuela.
Date of Copyright: 1992 |
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SLN @ rana @ 194 |
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704 |
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Author |
Wangchuk, T.R. |
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Title |
Snow Leopard: Its Management with Emphasis on Bhutan |
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Miscellaneous |
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1992 |
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Bhutan; management; browse; 2440 |
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Unpublished report. Date of Copyright: 1992 |
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SLN @ rana @ 195 |
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1006 |
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Author |
Norbu, U.P. |
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Title |
Status and Conservation of Snow Leopard In Bhutan |
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Conference Article |
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1997 |
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28-34 |
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Bhutan; livestock; predation; prey; parks; park; reserve; reserves; refuge; poaching; hunting; status; distribution; education; conservation; management; yaks; protected-area; browse; protected; area; 2420 |
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International Snow Leopard Trust |
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Lahore, India |
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R.Jackson; A.Ahmad |
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Full Text at URLTitle, Monographic: Eighth International Snow Leopard SymposiumPlace of Meeting: Islamabad, PakistanDate of Copyright: 1997 |
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SLN @ rana @ 321 |
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725 |
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Jackson, R. |
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Bhutan Workshop: Thimpu, Land of the Thunder Dragon |
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1997 |
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xv |
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1 |
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Bhutan; Himalaya; Slims; surveys; Islt; Jigme-Dorgi; poisoning; herders; browse; 4510 |
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Islt |
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Seattle, Wa |
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Full text at URLJournal Title: Snowline |
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SLN @ rana @ 439 |
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459 |
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Author |
Blower, J.H. |
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Title |
Nature Conservation in Bhutan: Project Findings and Recommendations |
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Miscellaneous |
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1986 |
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Bhutan; habitat; status; distribution; browse; 2310 |
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Snow leopard is relatively common, but there is some destruction of its habitat in Northern Bhutan |
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UNDP/FAO Project. BHU/83/002 Field Document. |
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SLN @ rana @ 88 |
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175 |
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Wikramanayake, E. |
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Tracking snow leopard and blue sheep, WWF conservationist Eric Wikramanayake goes on a wildlife survey in Bhutan |
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Bhutan; blue-sheep; surveys; Jigme-Dorji; parks; park; reserve; protected-area; refuge; habitat; blue; sheep; browse; Jigme; Dorji; protected; area; 3980 |
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Full text at URL |
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SLN @ rana @ 8 |
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1021 |
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Author |
Shrestha, R.; Wegge, P. |
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Title |
Wild sheep and livestock in Nepal Trans-Himalaya: coexistence or competition? |
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2008 |
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Environmental Conservation |
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32 |
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2 |
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125-136 |
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bharal; blue sheep; diet; food habits; mountain ungulates; Nepal; pastoralism; pseudois nayaur; rangeland management; resource partitioning |
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Excessive grazing by livestock is claimed to displace wild ungulates in the Trans-Himalaya. This study compares the seasonal diets and habitat use of sympatric wild naur Pseudois nayaur and domestic goat Capra hircus, sheep Ovis aries and free-ranging yak Bos grunniens in north Nepal and analyses their overlap both within and across seasons. Alpinemeadow and the legumes Oxytropis and Chesneya were critical resources for all animal groups. High overlap occurred cross-seasonally when smallstock (sheep and goats) in summer used the spring and autumn ranges of naur. Relatively high total ungulate biomass (3028 kg km-2) and low recruitment of naur (56 young per 100 adult females in autumn) suggested interspecific competition. The spatio-temporal heterogeneity in composition and phenology of food plants across the steep gradient of altitude, together with rotational grazing, appears to indirectly facilitate coexistence of naur and smallstock. However, owing to high crossseasonal (inter-seasonal) overlaps, competition is likely to occur between these two groups at high stocking densities. Within seasons, naur overlapped more with free-ranging yak than with smallstock. As their habitat use and diets were most similar in winter, when both fed extensively on the same species of shrubs, naur was most likely to compete with yak during that season.
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SLN @ rana @ 936 |
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890 |
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