WATER - Tracking marine food sources

Oceans cover nearly 75 percent of the earth's surface and have always been an important source of food and resources. Yet overfishing, pollution and mismanagement threaten marine ecosystems and thus one of the earth's most important sources. We can help to restore these ecosystems by understanding how they work and what affects them. Marine ecosystems have a multitude of organisms that depend on each other for food and nutrients. Researchers know ...

http://phys.org/news/2013-12-tracking-marine-food-sources.htm