4.1
Unusual winter weather events cause rapid changes in the tundra

Did you know?
Unusual weather events happen in summer as well as winter. One village in Siberia experienced 38 degrees C in June 2020 (hotter than Italy) and warm periods above freezing in winter when it can rain on snow are becoming more frequent.
Unusual weather affects biodiversity very quickly.
A few warm days in winter, particularly with rain, can kill animals such as reindeer and lemmings which cannot access their food under the ice.
The dead animals attract scavengers from the south
Another extreme weather event that is increasing is the number of lightning strikes that cause forest fires and kill animals: 350 musk ox were killed in Norway by one lightning storm.

Get Active!
When animals from different areas meet, one of two things can happen:
  • One displaces the other e.g. the red/grey squirrels in UK, Arctic/red fox in Scandinavia. We can predict the 'losers' – they are the very specialised animals. For example, what happens to the Arctic Fox when there is no snow? It will be unable to camouflage itself to hide from predators and also to hunt for prey, which increases its susceptibility to be hunted itself or starve.
  • They get on and cross breed
Pizzly Resource