Pastoralism in the highest peaks: Role of the traditional grazing systems in maintaining biodiversity and ecosystem function in the alpine Himalaya

35. Singh C., Paniprahy S, Thapliyal A, Kimothi M., Soni P, Parihar J. Monitoring the alpine treeline shift in parts of the Indian Himalayas using remote sensing. Curr Sci. 2012; 102: 559–562. 36. Gaire N., Koirala M, Bhuju D., Borgaonkar H. Treeline dynamics with climate change at the central Nepal Himalaya. Clim Past. 2014; 10: 1277–1290. 37. Telwala Y. Climate change and alpine flora in Sikkim Himalaya. In: Arrawatia M., Tambe S, editors. Climate Change in Sikkim—Patterns, Impacts and Initiatives. Sikkim, India: Information and Public Relations Department Government of Sikkim; 2012. pp. 103–124. 38. Tambe S, Rawat GS. Ecology, economics, and equity of the pastoral systems in the Khangchend- zonga National Park, Sikkim Himalaya, India. Ambio. 2009; 38: 95–100. https://doi.org/10.1579/0044- 7447-38.2.95 PMID: 19431939 39. Gupta R, Haider LJ, O¨ sterblom H. The theory of cross-scale interactions: an illustration from remote villages in Sikkim, India. Environ Dev Sustain. 2020; 22: 3777–3804. https://doi.org/10.1007/s10668- 019-00329-0 40. Feroze SM, Ray LI, Singh KJ, Singh R. Pastoral yak rearing system is changing with change in cli- mate: an exploration of North Sikkim in Eastern Himalaya. Clim Change. 2018; 157: 483–498. 41. Bhagwat S, Diwan M, Venkataramani V. Study of ecological, eocio-economic and livelihood dimen- sions of grazing exclusion in protected forests of West Sikkim. Institute for Financial Management and Research—Centre for Development Finance (IFMR-CDF) in collaboration with Department of Forest,.

2012. http://www.sikkimforest.gov.in/Grazing-ban-study.htm 42. Bhagwat S, Diwan M, Venkataramani V. Analysis of Grazing Exclusion Policy through a Climate Change Mitigation Lens: Case Studies from Barsey Rhododendron Sanctuary,West Sikkim. In: Arra- watia ML, Tambe S, editors. Climate Change in Sikkim—Patterns, Impacts and Initiatives. Gangtok: Information and Public Relations Department Government of Sikkim; 2012. pp. 351–368. 43. Tambe S, Bhutia N, Arrawatia M. People’s opinion on the Impacts of “Ban on Grazing” in Barsey Rho- dodendron Sanctuary. Sikkim, India. The Mountain Institute. Gangtok, Sikkim. Gangtok, Sikkim; 2005. http://www.indiaenvironmentportal.org.in/content/334371/peoples-opinion-on-the-impacts-of- ban-on-grazing-in-barsey-rhododendron-sanctuary-sikkim-india/ 44. Singh P, Chauhan A. Plant Diversity in Sikkim Himalaya. In: Hajra P, Mugda V, editors. Plant Diversity and Hotspots in India. Calcutta: BSI; 1997. pp. 137–162. 45. Ingty T, Bawa KS. Climate change and indigenous people. In: Arrawatia ML, Tambe S, editors. Cli- mate Change in Sikkim Patterns, Impacts and Initiatives. Information and Public Relations Depart- ment,Government of Sikkim, Gangtok; 2012. pp. 275–290. 46. Briggs JM, Knapp AK. Interannual variability in primary production in tallgrass prairie: climate, soil moisture, topographic position, and fire as determinants of aboveground biomass. Am J Bot. 1995; 82: 1024–1030. 47. Smith MD, Knapp AK. Dominant species maintain ecosystem function with non-random species loss. Ecol Lett. 2003; 6: 509–517.

48. Rodgers WA, Panwar HS. Planning a wildlife protected area network in India. Wildlife Institute of India, Dehradun; 1988. http://agris.fao.org/agris-search/search.do?recordID=XF9093847 49. Government of Sikkim. 19th Livestock Census, 2012. II. Gangtok, Sikkim; 2012. http://www.sikkim- ahvs.gov.in/Download/Report2.pdf 50. Ingty T. High mountain communities and climate change: adaptation, traditional ecological knowledge, and institutions. Clim Change. 2017; 145: 41–55. https://doi.org/10.1007/s10584-017-2080-3 51. Joshi S, Shrestha L, Bisht N, Wu N, Ismail M, Dorji T, et al. Ethnic and Cultural Diversity amongst Yak Herding Communities in the Asian Highlands. Sustainability. 2020; 12: 957. https://doi.org/10.3390/ su12030957 52. LP DAAC. ASTER Global Digital Elevation Model (GDEM) v2. NASA EOSDIS Land Processes DAAC,. Sioux Falls, South Dakota; 2014. 53. McNaughton SJ, Milchunas DG, Frank DA. How can net Primary Productivity be Measured in Grazing Ecosystems? Ecology. 1996; 77: 974–977. https://doi.org/10.2307/2265518 54. Leroy B, Petillon J, Gallon R, Canard A, Ysnel F. Improving occurrence-based rarity metrics in conser- vation studies by including multiple rarity cut-off points. Insect Conserv Divers. 2012; 5: 159–168. 55. Guisande C, Heine J, Garcı´a-Rosello´ E, Gonza´ lez-Dacosta J, Vilas LG, Perez-Schofield BJG. DER: An algorithm for comparing species diversity between assemblages. Ecol Indic. 2017; 81: 41–46. https://doi.org/https%3A//doi.org/10.1016/j.ecolind.2017.05.049

56. Menhinick E. A Comparison of Some Species-Individuals Diversity Indices Applied to Samples of Field Insects. Ecology. 1964; 45: 859–861. PLOS ONE Role of the traditional grazing systems in maintaining biodiversity and ecosystem function in alpine Himalaya PLOS ONE | https://doi.org/10.1371/journal.pone.0245221 January 7, 2021 16 / 19