ENV 1020 Chapter Notes - Chapter 16: Keystone Species, Species Richness, Species Evenness
15 Nov 2017
School
Department
Course
Professor
Document Summary
The group of species that occupy a given area, interacting either directly or indirectly is called a community. 16. 1- biological structure of c0mmunity defined by species composition. Relative abundance- individuals of all species within the community. Ranking abundance diagram- the most abundant species is plotted first along x-axis with the corresponding value on y axis until all species are plotted. Species richness - is a count of the number of species occurring within the community and is typically denoted by the symbol s. Species evenness- refers to the equitability in the distribution of individuals among the species. Species diversity - consider both the number and relative abundance of species within the community. Measures the probability that two individuals randomly selected from a sample will belong to the same species. In absence of diversity where only one species is present the value of d is 1.
