For caribou, growth of woody plants like alders and willows means problems. Caribou depend on tundra plants like lichen and mosses; the shrubs and trees taking over the terrain are reducing the ...

Tundra swan subspecies also winter in Europe ... These large birds feed by dipping their heads underwater to pluck aquatic plants, tubers, and roots. They also eat shellfish and are developing ...

"They need the things all plants need to grow ... thick hosted an entire tundra ecosystem, with flowers and potentially even small trees, according to the statement. The 1993 core reexamined ...