The regional spruce forest-tundra vegetation of the creek has had little change since the eruption of White River ash at 1230 yr B. P.

这一特点与该区广泛发育的泥炭丘地的形成密切相关，而不代表区域性云杉森林—苔原植被面貌在过去的1230年中曾有明显的改变。

youdao

Tundra is flat land with very little vegetation.

苔原是平坦的土地，植被稀少。

youdao

Changed tundra combat environment to have slightly less vegetation.

改变了冻土的战斗环境，有轻微的植被。

youdao

It will also help them forecast changes in the tundra's vegetation.

ECONOMIST: Global warming and the permafrost

What my colleagues and I are discovering from our own work in Alaskan tundra is that this shift in vegetation cover has implications -- some good, some bad -- for the animals that depend on it for food and shelter.

CNN: Next global warming worry: Thawing tundra

Rising temperatures have also resulted in vegetation sprouting up in unexpected places along the tundra.

BBC: Update on Alaska��s national parks