They showed the dynamic importance of prey refuges to the continued existence of predation systems. And they discovered likelihood of positive feedback in predation. They showed that such positive feedback would be a major source of population oscillation and instability. Recently, using gerbils and trained barn owls, Rosenzweig and his Israeli colleagues experimentally confirmed the existence of predatory positive feedback in nature. In other work, Rosenzweig addresses the evolutionary duel between predators and their victims.
Natural selection adjusts each to counter the evolutionary advances made by the other.
Rosenzweig's investigations predicted that predators and victims would achieve long term parity in their struggle. Environmental issues and public policy. Dr. Rosenzweig tries to address matters of public concern by applying the results of his and other ecological research. He showed how to use the principles of density-dependent habitat selection to achieve cheap, quick censuses of economically important, annually harvested animal populations. Working with a committee of the National Academy of Sciences, he used the rules of species-area relationships to develop early warning indicators of environmental health.