Sentence examples for decline of populations from inspiring English sources

The synergetic negative effect of copper and hydrocarbons on C. crambe settlers may cause a decline of populations in areas with both sources of contamination.

Overgrazing by sea urchins, outcompetition by mussels, habitat destruction, scientific research sampling and, probably, human trampling and chemical pollution are to be blamed for the decline of populations thriving in shallow waters.

Our results suggest that the widespread conversion of forest to urban land in small catchments has likely resulted in a substantial decline of populations of stream salamanders and could have serious effects on stream ecosystems.

A serious environmental problem is the decline of populations of pollinator insects, and a number of species of insects are now cultured primarily for pollination management in order to have sufficient pollinators in the field, orchard or greenhouse at bloom time.

Nevertheless, this aim is hampered by conservation issues resulting from a serious decline of populations.

These afflictions and related factors were responsible for a general decline of population.

The "eds and meds" revolution has yet to reverse the long standing decline of population.

The clearing of mature forests for agricultural development is the main reason for the decline of population.

However, the mechanisms involved in this decline of population linked to winter's mortality remain unclear.

Thus, the decline of population smoking rate in these areas could at least partly, if not largely, explain the decline of NPC incidence.

This pattern of population dynamics strongly differed from the dynamics of the Culex populations in the absence of competitors, a situation in which only the highest pesticide concentration resulted in a decline of population abundance.