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Eco Evo Exam 3(c.11)

Definitions

TermDefinition
Spacial structure The pattern of density and spacing of individuals in a population.
Fundamental niche The range of abiotic conditions under which species can persist.
Realized niche The range of abiotic and biotic conditions under which a species persists.
Geographic range A measure of the total area covered by a population.
Ecological niche modeling The process of determining the suitable habitat conditions for a species.
Ecological envelope The range of ecological conditions that are predicted to be suitable for a species.
Endemic Species that live in a single, often isolated, location.
Cosmopolitan Species with very large geographic ranges that can span several continents.
Abundance The total number of individuals in a population that exist within a defined area.
Density In a population, the number of individuals per unit area or volume.
Dispersion The spacing of individuals with respect to one another within the geographic range of a population.
Clustered dispersion A pattern of population dispersion in which individuals are aggregated in discrete groups.
Evenly spaced dispersion A pattern of dispersion of a population in which each individual maintains a uniform distance between itself and its neighbors.
Random dispersion A pattern of dispersion of a population in which the position of each individual is independent of the position of other individuals in the population.
Dispersal The movement of individuals from one area to another.
Census Counting every individual in a population.
Survey Counting a subset of the population.
Area- and volume-based surveys Surveys that define the boundaries of an area or volume and then count all of the individuals in the space.
Lin-transect surveys Surveys that count the number of individuals observed as one moves along a line.
Mark-recapture survey A method of population estimation in which researchers capture and mark a subset of a population from an area, return it to the area, and then capture a second sample of the population after some time has passed.
Lifetime dispersal distance The average distance an individual moves from where it was hatched or born to where it reproduces.
Dispersal limitation The absence of a population from suitable habitat because of barriers to dispersal.
Habitat corridor A strip of favorable habitat located between two large patches of habitat that facilitates dispersal.
Ideal free distribution When individuals distribute themselves among different habitats in a way that allows them to have the same per capita benefit.
Subpopulations When a larger population is broken up into smaller groups that live in isolated patches.
Basic metapopulation model A model that describes a scenario in which there are patches of suitable habitat embedded within a matrix of unsuitable habitat.
Source-sink metapopulation model A population model that builds upon the basic metapopulation model and accounts for the fact that not all patches of suitable habitat are of equal quality.
Source subpopulations In high-quality habitats, subpopulations that serve as a source of dispersers within a metapopulation.
Sink subpopulations In low-quality habitats, subpopulations that rely on outside dispersers to maintain the subpopulation within a metapopulation.
Lanscape metapopulation model A population model that considers both differences in the quality of the suitable patches and the quality of the surrounding matrix.
Created by: BriawnaW