ENVS 1000 Lecture Notes - Lecture 6: Trophic Level, Intraspecific Competition, Interspecific Competition
8 Dec 2016
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Document Summary
Ecological community- species that interact within a specific area form this (web of life) Intraspecific competition- same species compete for shared resources. Interspecific competition- different species compete for shared resources. Food web- feeding interactions among species in a community. Primary producers- base of food web, make food out of chemical energy and. Transforms energy from the sun or inorganic chemical reactions in carbs that are carried up to higher trophic levels. Ultimate source of chemical energy used by everyone else. Predators- species that hunt and kill their prey. Carnivores- small populations and super vulnerable to habitat loss, hunting pressure, and environmental change. Decomposers- feed on nonliving organic matter. (scavengers) Trophic level- organisms position in the food chain. Decomposers primary producers primary consumers secondary. Trophic level efficiency- about 10% energy going to the next level, the. Biodiversity- variability of living organisms, including variability within a species and outside of a species. Stability diversity of species & complexity of connections.
