components of an ecosystem

For this assignment, pick one specific real existing ecosystem (forest, ocean, desert, river etc) and IN DETAIL describe the components of the ecosystem and the trophic interactions using vocabulary from lab. Pick an ecosystem that actually exists (like the cloud forest in Costa Rica or the Great Barrier Reef in Australia). Then add one way in which your choices and actions in your life impact this ecosystem. This should be no less than 5 full paragraphs. I am looking for specifics here, plants and animals in the ecosystem, climate etc.