BIOLOGY 152 Lecture Notes - Lecture 19: Biomagnification, Primary Succession, Bioaccumulation
2 May 2017
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Document Summary
Community- a group if interacting species that occur at the same time in the same place. Community ecology: patterns and processes at various scales of time and space. Patterns and processes of succession, variation in species richness, productivity, food webs, etc. Food, fuel, oxygen, water purification, medicines, flood control, climate control, etc. Ecosyste(cid:373) ser(cid:448)ices do(cid:374)"t usually (cid:449)ork (cid:449)ell if fe(cid:449) species are prese(cid:374)t. Positive relationship between species richness and community function. Succession: change in species diversity and composition over time. Directional change has several stages: primary and secondary succession pioneer, intermediate and climax stage. No life pioneer stage intermediate stage climax stage. Primary succession secondary succession intermediate stage climax stage. Flow of energy and nutrients in food webs- energy and nutrients move through organisms within ecosystems. Energy and nutrients move through organisms within the ecosystems. All organisms are either consumer or end up as detritus if the sun stopped shining, all life on earth would not go extinct.
