BIOLOGY 1B Lecture Notes - Lecture 19: Kangaroo Rat, Asymptote, Thomas Robert Malthus
Document Summary
Used to be a basis in ecology for teaching students about ecology. Logistic growth levels off at carrying capacity. R and k are mathematical variables in math equations. Some species have seemed to evolved in density-dependent populations (k) and some are in r-selected populations. Model of allo(cid:272)atio(cid:374) so(cid:373)eti(cid:373)es (cid:272)alled (cid:862)pri(cid:374)(cid:272)iple of allo(cid:272)atio(cid:374)(cid:863) Conditions are environmental a(cid:373)(cid:271)ie(cid:374)t (cid:448)aria(cid:271)les te(cid:373)perature, (cid:449)ater le(cid:448)els, et(cid:272). Resour(cid:272)es stuff orga(cid:374)is(cid:373)s uses for sur(cid:448)i(cid:448)al a(cid:374)d reprodu(cid:272)tio(cid:374) i(cid:374) fi(cid:374)ite supply. Those resources can be used for reproduction and survival (growth, defense, and maintenance) Maintenance category might even grow larger when conditions are stressful. Resour(cid:272)es are (cid:374)or(cid:373)al (cid:271)ut stressful (cid:272)o(cid:374)ditio(cid:374)s third (cid:271)ard. Ta(cid:271)le (cid:272)o(cid:374)ditio(cid:374)s a(cid:374)d resour(cid:272)es are i(cid:374) a(cid:271)u(cid:374)da(cid:374)(cid:272)e se(cid:272)o(cid:374)d (cid:271)ar. Resources acquisition doesn"t necessarily scale up with resource availability. If you give a plant more and more light, it doesn"t necessarily use more of that light. Resource acquisition goes up but levels off as resource availability goes up.
