Biology 2483A Lecture Notes - Lecture 15: Trophic Cascade, Keystone Species, Kelp Forest

• School: Western University
• Department: Biology
• Course: Biology 2483A
• Professor: Hugh Henry

Document Summary

In multiple choice format, identify the definitions of the following terms: Community: groups of interacting species that occur together at the same place and time. Physical community: physically defined community might encompass all the species in a sand dune, a mountain stream, or a desert. Biological community: defined community might include all the species associated with a kelp forest, a freshwater bog or a coral reef. Taxonomic affinity: a way of defining subset of species (eg. all bird species in a community) Guild: a way of defining a subset of species by resource use (group of species that use the same resource) Functional group: a way of defining subset of species with similar function (species that function in similar ways but don"t always use the same resource) Trophic levels: four levels of energetic interactions. Horizontal interaction: a nontrophic (energy) interaction like competition. Interaction web: more accurate than food web, describe both trophic (vertical) and non-trophic (horizontal) interactions.