In some cases, a too small mean value may not have a biological impact.

But it is devastating to the ecosystem and so unfamiliar, experts said, that its full biological impact might not be clear for years.

"All uncontrollable stress can have the same biological impact."

Ominous future under the ozone hole: assessing biological impacts in Antarctica.

Its solubility and hence biological impact is strongly influenced by pH.

Such solitary damnation has less of a biological impact on the female of the species.

But we don't know what the long-term ecological or biological impacts would be.

There are also concerns about feed quality, farm operating standards and the biological impact of using wild stock for culturing.

This recreational area's popularity has led to physical, biological and social impacts.

If built, the Yusufeli Dam will is expect to have significant biological impacts including: