BIOB50H3 Lecture Notes - Lecture 9: Apex Predator, Keystone Species, Decomposer
Document Summary
Note: the beginning of this lecture consists of slides from the last lecture, which are already in the. Lecture 8 notes and are hence skipped here. 1: species act as agents of natural selection when they interact, the outcome of interactions among species is dynamic and conditional. Ecologists often delineate communities based on their physical attributes or biological attributes, although this consideration is getting less and less common: the more common method of looking at communities is based on question of species of interest. Functional group: a group of species linked by evolution, a group of species that use the same resources. Species that function in similar ways but may or may not use similar resources. Food chains => transfer of energy and nutrients through trophic levels, each species exists only at one trophic level in chain (shows one series of interactions only) Food webs transfer of e and nutrients through.
