Risks to Subnivean Organisms

A recent study has found that the climate change is posing threat to various life forms in the ‘subnivium’ part of cryosphere.

Subnivium

Subnivium is a part of the snow that lies between the top of the frozen ground and the bottom of snow layer. The term ‘subnivium’ is derived from Latin ‘sub’ meaning below and ‘nivis’ meaning snow. It is a stable microclimate that is relatively warmer than the conditions above.

Life Forms in Subnivium

Since the subnivium is warmer than the outside conditions, several organisms live in it- mosses, microbes like fungi, plants like glacier lily and animals like porcupines, rodents and birds. While in the subnivium, the organisms actively go about their life- they perform photosynthesis, germinations, forage and even reproduce.

Threats to the Subnivium

The subnivium is temporary in nature. It is formed only when there is at least 6 inches of snowfall. This microclimate is threatened by human activities like skiing, hiking boots, snow mobiles, etc. It is also being threatened by the effects of climate change such as changing pattern of winter snow cover, winter duration, etc.