The words listed are important to the ecology unit because we see major themes that pop up in every chapter. Each species has it's own evolution, it's own niche, and therefore it's own behavior to adapting to their environment. They must fave interspecific and intraspecific interactions with other organisms. Without the biogeochemical cycles, our ecosystem/biosphere would not be able to obtain carbon, oxygen, nitrogen, phosphorus, etc. Also, without our trophic levels, there would be no transfer of energy or releasement of heat as the level of organizations(another theme) moves up after each organism eats an organism. Ecosystems are subject to changes and it can be caused by either organisms or humans. Humans can set fire, destroy lands for urbanization and agriculture, while abiotic and biotic factors can affect the ecosystems. As ecosystems are being wiped out, animals are going to be labeled as endangered or threatened species.
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