Earth First! Earth First! is a radical environmental advocacy group that emerged in the Southwestern United States in 1979. It was co-founded on April 4, 1980 by Dave Foreman, Mike Roselle, Howie Wolke, Bart Koehler, and Ron Kezar.
A eutrophic body of water, commonly a lake or pond, has high biological productivity. Due to excessive nutrients, especially nitrogen and phosphorus, these water bodies are able to support an abundance of aquatic plants. Usually, the water body will be dominated either by aquatic plants or algae.
Table 2.1 Typical changes observed in lakes experiencing 'artificial' eutrophication. â¢ Turbidity increases, reducing the amount of light reaching submerged plants. â¢ Rate of sedimentation increases, shortening the lifespan of open water bodies such as lakes.