Why would a temperature increase of only a few degrees be so damaging to the tundra ecosystem? (Select all that apply.) Plants and animals from colder ecosystems would begin to move into the tundra ecosystem.

Producers that grow best in colder temperatures would be less available to consumers that eat them.

Permafrost would melt which would cause a release of huge amounts of methane gas.

The active soil will freeze up because it is well insulated, and this would cause plants to die.