MBIO 3280 Lecture Notes - Lecture 27: Anabaena, Homeostasis, Thermostat
22 Nov 2017
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Document Summary
Dispersal: dissemination of organisms from one location to another. Facilitated by special resistant structures (such as endospores, cysts, conidiospores), or by animal behaviours (such as cud-chewing) Colonization: establishment of a population or community in a new habitat. Pioneer organism: the first species that colonize a newly formed habitat (ex. Cooled and solidified lava, or bedrock following retread of glacier. Succession (primary and secondary) : the change in species composition of communities over time ,with habitat modification usually facilitated by the community itself. Climax community: a species assemblage that has reached equilibrium and no longer changes in composition significantly. Diversity: (number of species and relative evenness in population sizes), and. Diversity: number of species and evenness of their populations (better indicator of biological variation) Shannon-weaver diversity index (h"): way to express diversity in numbers: 1. 5 to 3. 5 (max) Improves absorption of nutrients like phosphorous (low conc.
