Mangroves are like botanical amphibians, and form some of the most productive ecosystems on Earth.

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

Bald cypress swamps are some of the world's most productive ecosystems.

Estuaries are some of the most productive ecosystems in the world.

Wetlands are the most productive natural ecosystems in the world because of the proximity of water and soil.

The estuary is significant in that it is a highly productive ecosystem, despite its relatively small size.

Coral reefs form some of the world's most productive ecosystems.

Flood plains, the subject of this and many other disputes across the country, are among the most productive ecosystems in the world.

Wetlands in Mexico are dynamic, complex and productive ecosystems.

The human history of Mono Lake is associated with its productive ecosystem.