BILD 3 Lecture Notes - Lecture 26: Logistic Function, Exponential Growth, Ecological Niche
30 May 2016
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Document Summary
Predicting a population"s growth using the exponential growth model: deltan/deltat=rn. 50 births and 10 deaths on the first day. Per capita growth rate (b - m) = . 4. By the end of the day, n = 140. These factors can lower birth rates and raise death rates. Populations exhibiting logistic growth are directly or indirectly regulated by their own density. Maximum population size that the environment can support. Proportion of total capacity unused = (k-n)/k deltan/deltat = rn(proportion of total capacity unused) Evironmental factors that stop a population from growing. An ecological niche is the way a particular species makes its living and the space that it occupies to make that living. The sum total of an organism"s use of biotic and abiotic resources in its environment. It is not just the habitat that species occupies. It"s the (cid:449)ays i(cid:374) (cid:449)hi(cid:272)h it i(cid:374)tera(cid:272)ts (cid:449)ith other spe(cid:272)ies a(cid:374)d the physi(cid:272)al e(cid:374)(cid:448)iro(cid:374)(cid:373)e(cid:374)t.
