POLS 131 Lecture Notes - Lecture 7: Apollo Program, Decomposer, Precautionary Principle
Document Summary
Any group of plants, animals, or non living things interacting within their external environment. A community of organisms in a given location, along with nonbiological factors, and the interactions between them. Both mention living/organic things and nonliving/nonbiological things. Notion of interactions - more than just the stuff in it, but also the relationships between all of them. Producers primary consumers secondary consumers . Considered to be finite (inertia); matter is recycled and changes shape. Considered infinite in the form of the sun. Time (it takes a certain amount of time depending on the ecosystem and its condition) Humans break the cycle of an ecosystem in terms of pollution (adding something to an ecosystem) or taking something out (like wolves) Four laws of ecology (not real laws, but principles) You can"t just do one thing to an ecosystem without expecting some consequences. Tinstaafl (there is no such thing as a free lunch) There is no magical solution to any ecological problems.
