Changes in snow coverage threatens biodiversity of Arctic nature

Many of the plants inhabiting northern mountains depend on the snow cover lingering until late spring or summer. 
Snow provides shelter for plants from winter-time extreme events but at the same time, it shortens the length of growing season, which prevents the establishment of more southern plants. 
The reduced snow cover may be an even larger threat to the Arctic plants than rising temperatures.
Changes in temperature and snow cover duration will affect the risk for extinction in northern flora. The results show that many plant species can benefit from a warmer climate, but the rapidly receding snow cover may irradicate a large part of the flora typical to northern mountains. Many of these species are already endangered, which makes their conservation an urgent challenge.

Arctic greening thaws permafrost, boosts runoff

Arctic shrub-snow interactions to obtain a better understanding of the far north's tundra and vast permafrost system.
shrubs can lead to significant degradation of the permafrost layer that has remained frozen for tens of thousands of years.
If the trend of increasing vegetation across the Arctic continues, there are likely to see a strong increase in permafrost degradation.