The narrow sea is home to a unique and rich ecosystem.

Florida possesses many of our nation's most unique and vulnerable ecosystems.

In the name of creating room for species already common throughout the state, it would destroy the park's unique ecosystem.

The river is considered by ecologists to provide a unique ecosystem in the region.

The expedition's goal was to study all the new things in this unique ecosystem.

Therefore there is a hope that changes still can be made in order to save this unique residual ecosystem.

The Palisades are considered by environmentalists to form a unique ecosystem in the region.

It is a flat saline depression, with a unique ecosystem.

This is a 14 km2 of unique ecosystem facing devastation.

On it, 1,560 laboratories, in fact, were built, each containing a unique ecosystem.