Biology 2485B Lecture Notes - Lecture 5: Keystone Species, Detritivore, Radiant Energy
12 Apr 2019
School
Department
Course
Professor
Document Summary
Lecture 5 species interactions" (energy and food webs) Learning objectives: appreciate how energy enters and moves through ecosystems, understand basic concepts related to food webs, understand and define keystone species. Ecological communities: different than communities and ecosystems, community ecologists are interested in which species coexist, how they relate to one another, how communities change through time, and why these patterns exist. Energy flows through ecosystems: when you think about ecosystems, one of the key properties is that energy flows through, as organisms feed on one another, this energy moves through the community, from one rank in the feeding. Those organisms that are able to acquire the external energy (e. g. , from light) and fix it in the form of organic chemical bonds. The first link to getting the external energy into the ecosystem and starting to create the chain of disorder: chemical bonds are available for other organisms, e. g. trees, moss, algae, cyanobacteria, and etc.
