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AAAS news briefs from UC Davis
Date:2/21/2011

emy-driven evolution," takes place. Environments that select for aggression and strong defenses are typically highly productive environments with a high abundance of individuals, such as rainforests or major reef systems in the ocean. In contrast, less productive environments are less important for evolution. These hotbeds of evolution are also important for conservation, because they act as source populations that send individuals to more distant and less productive environments. For example, the waters around a large archipelago of islands may contain many self-sustaining populations of animals that help to sustain populations around more remote islands.

Contact: Geerat Vermeij, Geology, (530) 752-2234, gjvermeij@ucdavis.edu


Presentation: A Framework for Action: Lessons from the California Nitrogen Assessment
Presenter: Thomas Tomich, director, Agricultural Sustainability Institute at UC Davis
Date and time: Saturday, Feb. 19, 3 p.m.
Location: 140A Washington Convention Center
Symposium: Global and Local Responses to the Nitrogen Challenge: Science, Practice, and Policy

Managing the benefits and costs associated with agricultural nitrogen is emerging as one of the great challenges of the 21st century. On one hand, nitrogen is an essential resource. As a component of synthetic and organic fertilizers, it is critical to the success of agriculture and has played a vital role in the health of humanity over the last half century. On the other hand, the increased quantity of nitrogen used and produced by agriculture is causing significant changes to the environment including climate change, air and water pollution, and biodiversity loss and threatens the vitality of human and natural resources worldwide. But while the challenges nitrogen presents to society are clear, the most appropriate responses are less apparent. Tomich leads the California Nitrogen Assessment to f
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Contact: Sylvia Wright
swright@ucdavis.edu
530-752-7704
University of California - Davis
Source:Eurekalert

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