"It is now widely recognized that commercial logging has damaged ecosystem health, clean water, and recreational opportunities," the letter reads.

Watch for the earliest indicators of ecosystem health.

Restoring ecosystem health in frequent-fire forests of the American West.

EVM in future may be increasingly linked to discussions and research on ecosystem health.

According to the World Wildlife Fund, the polar bear is important as an indicator of arctic ecosystem health.

This bird serves as an indicator species for the alpine tundra, and denotes overall ecosystem health.

Microorganisms can be used as indicators of aquatic or terrestrial ecosystem health.

The trespassing of ecological threshold often leads to rapid change of ecosystem health.

The need to better consider long-term ecosystem health and its role in enabling human habitation and economic activity is urgent.

EPA considers nitrogen one of the top stressors to aquatic ecosystem health.