Hasler pioneered a research method based on manipulation of entire lake ecosystems.

The project sought to improve the overall quality of the lake ecosystem for native species.

Thoreau, as far as is known, was the first American naturalist to study a lake ecosystem.

Human activity has led to severe pressure on the lake ecosystem.

However, they deteriorated water quality due to reduced light penetration and accumulation of organic matter in the lake ecosystem.

Only three were reported in the lake ecosystem in 1969, and one species is extinct.

However, researchers have used high quality data to predict regime shifts in a lake ecosystem.

For example, alterations in the upper watershed can impact the entire lake ecosystem.

Preserving native vegetation around lakes is critical to a healthy lake ecosystem.

While the stocks of those species that survived are in many cases recovering, the lake ecosystem has changed irrevocably.