Around 7 to 8 hectares of forests have been lost in the Nanda Devi National Park in the last one decade either due to climate change or the Kedarnath flash floods of 2013.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/nanda-devi-loses-forests
[2] http://admin.indiaenvironmentportal.org.in/category/author/jotirmay-thapliyal
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/tribune-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttaranchal-uttarakhand
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nanda-devi-np
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/deforestation
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/floods
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/trees
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forests