ecosystems

There are always examples of degradation, but there are very few examples of ecosystems left that are that pristine.

Many states and cities are acting to create higher-wage ecosystems through minimum-wage and living-wage laws and ordinances.

We know that conservative catches and healthy ecosystems maintain robust fish stocks.

Even modest fishery harvests influence the health of ocean ecosystems.

And so, quietly, notch by notch, jellyfish continue to inherit damaged ecosystems.

The precise paths of radioelements through aquatic ecosystems are almost unknown.

These transition zones have very fragile, delicately balanced ecosystems.