MacDonald Creek problems. Distinct areas where organisms live in an interdependent system. Amazon rainforest or Great Barrier Reef. The world has many ecosystems Large areas with similar ecosystems are called biomes, they tend to be defined in terms of predominant vegetation. Biomes can be further subdivided into communities.
Ecosystems are under pressure from man.
Diversity of ecosystems is under threat even when ecosystem remains. Many ecosystems have been fragmented. Identify and name species present. Conduct counts of various species. Use transects, quadrat methods, random sampling and aerial photography to characterize larger areas.