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    Welcome to the Africa Collection! This new collection is centered on the environmental, economic and social challenges faced by the people of Africa. The goal of this collection... More »

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Coral reefs: threatened by warming oceans Last Updated on 2010-11-12 00:00:00 There are a variety of human induced ocean changes that have degraded coral reef systems; these changes have greatly intensified in the last two centuries driven by the human population explosion. Proximate drivers of these changes include ocean warming, marine pollution, overfishing and mechanical abrasion of reefs. Although ocean warming may contribute only a fraction of the total stress to coral reef systems, the combined impact of the totality of all these environmental stressors is significant. Background Colonies of corals, marine invertebrate animals a few millimeters in diameter, develop a symbiotic relationship with coralline algae in the shallow, nutrient-poor waters of the tropics. Algae supply the coral invertebrates with carbohydrates, and their photosynthetic pigments impart color to the corals. In return, coral invertebrates provide the algae with a stable... More »
Africa (collection) Last Updated on 2009-08-06 02:42:39 Welcome to the Africa Collection! This new collection is centered on the environmental, economic and social challenges faced by the people of Africa. The goal of this collection is to draw attention to the magnitude and complexity of the challenges faced by the African continent in general and each of the countries in particular. The impact of these challenges goes beyond Africa which has one the world’s widest environmental, economic, and social disparities between the countries. The contributors to the African Collection are leading scientists and organizations both from within and outside Africa. This collection is a work in progress and you are encouraged to visit this site on a regular basis to learn more about what is being done in each of the African countries. To help you learn about the challenges faced by each of the countries we have designed an interactive map... More »