Much of the Arctic shows little impact from human activities, making it one of the few places on earth one can see intact ecosystems.

The Qian Tang offers a matchless opportunity to bring a huge, intact ecosystem under protection, he said.

We need to conserve species richness because we need a healthy, intact ecosystem for humans.

This is the largest remaining nearly intact ecosystem in the Earth's northern temperate zone.

Yellowstone is one of the few remaining intact ecosystems in the northern temperate zone of the earth.

Unhappily, however, neither Yellowstone nor any other park in the south 48 is an intact ecosystem.

It is famous for its beautiful lake, an unusual case of an intact ecosystem.

"The Highlands provides the region with fresh drinking water, and it's one of the last intact ecosystems that can support large populations of wildlife," he said.

The continued existence of these fisheries requires an intact, healthy, and productive ecosystem.

It is considered the largest intact ecosystem in southeastern B.C.