BIO120H1 Chapter Notes - Chapter 8: Lemming, Population Cycle, Negative Relationship
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BIO120H1 Full Course Notes
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P(cid:396)edato(cid:396)s o(cid:448)e(cid:396)(cid:396)a(cid:374) le(cid:373)(cid:373)i(cid:374)g populatio(cid:374) growth = collapse in lemming population followed by collapse in predator population. Irrespective of density of population such as environmental stressors & catastrophe: not influences by population density change, often abiotic, quality of nutrients in an environment affects ability of an organism to survive, grow & Include food/nutrient limitation, pollutants & climate extremes reproduce. (cid:395)uality of (cid:374)ut(cid:396)ie(cid:374)ts = e(cid:374)(cid:448)i(cid:396)o(cid:374)(cid:373)e(cid:374)tal st(cid:396)ess: e. g. reduction in phosphorus load from municipal sources left to reduction in total algal biomasses, environmental catastrophes can strongly affect population grow rates via mortality & habitat destruction, e. g.
