| Popis: |
One of the difficult problems facing scientists who are concerned with the environmental effects of the disposal of dredged material and industrial wastes into the aquatic environment is determining whether or not given waste components elicit chronic deteriorative responses in important species of organisms (Pequegnat et al., 1978a). The full importance of such low-level, nonlethal effects is not known, but it is suspected that repeated exposures may result in ecosystem changes equally as important as those caused by more easily determinable acute effects. Such considerations are particularly important to the aquatic environment, where dumped pollutants may be quickly diluted to legal nonlethal concentrations, but may still bring forth cumulative chronic response patterns. |
