Textbook Notes (280,000)
CA (160,000)
UTSC (20,000)
Chapter 15

Lecture 15 - Chapter 15 Key Terms


Department
Biological Sciences
Course Code
BIOC50H3
Professor
Marc Cadotte
Chapter
15

This preview shows half of the first page. to view the full 2 pages of the document.
Chapter 15 Key Terms
x biodiversity
o A term used to describe the diversity of important ecological entities that span
multiple spatial scales, from genes to species to communities.
x community
o A group of interacting species that occur together at the same place and time.
x community structure
o The set of characteristics that shape a community, including the number,
composition, and abundance of species.
x context-dependent
o A view of species interactions as variable in strength and direction under different
environmental conditions.
x direct interactions
o Interactions between two species, including traditional relationships such as
competition, predation, and positive interactions. Compare indirect interactions.
x dominant species
o A species that has large, community-wide effects by virtue of its size or
abundance, its strong competitive ability, or its provision of habitat or food for
other species, also called a foundation species.
x ecosystem engineer
o A dominant species that influences its community by creating, modifying, or
maintaining physical habitat for itself and other species.
x functional group
o A subset of the species in a community that function in similar ways, but do not
necessarily use the same resources. Compare guild.
x guild
o A subset of the species in a community that use the same resources, whether or
not they are taxonomically related. Compare functional group.
x horizontal interactions
o Non-trophic interactions, such as competition and some positive interactions, that
occur within a trophic level.
x indirect interactions
o Interactions in which the relationship between two species is mediated by a third
(or more) species. Compare direct interactions.
x interaction strength
o $PHDVXUHRIWKHHIIHFWRIRQHVSHFLHV¶SRSXODWLRQRQWKHVL]HRIDQRWKHUVSHFLHV¶
population.
x interaction web
o A concept that has been introduced to describe both the trophic (vertical) and non-
trophic (horizontal) interactions in a traditional food web.
x keystone species
o A strongly interacting species that has a large effect on energy flow and on
community structure and composition disproportionate to its abundance or
biomass.
www.notesolution.com
You're Reading a Preview

Unlock to view full version