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37 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Population |
A group of interacting individuals of a single species located within a particular area |
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Population ecology |
Studies the Dynamics of species population and how these populations change over space and time |
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Population size (n) |
Number of individuals within the population |
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Population density |
Number of individuals per unit of area |
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What does population density affect? |
Resource availability and social interactions |
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Spatial structure |
Pattern of density and spacing of individuals in a population |
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Ecological or fundamental niche |
Multi-dimensional map of environmental conditions which species could potentially live in in the absence of other species |
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Realized niche |
Conditions under which species actually lives in the nature in the presence of other species |
Actual |
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Geographic range |
A measure of the total area covered by population |
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Ecological niche modeling |
The process of determining the suitable habitat conditions were species |
Safe for animals? |
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Ecological envelope |
The range of ecological conditions that are predicted to be suitable for a species |
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Name the five population distribution characteristics |
Geographic range, abundance, density, dispersion, dispersal |
GADDD |
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Endemic species |
Species that live in a single often isolated location |
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Cosmopolitan |
Species with very large Geographic ranges that can span several continents |
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Abundance |
Total number of individuals in a population that exist within a defined area |
Can indicate if a population is thriving or near Extinction |
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Density |
In a population the number of individuals in a Quantified area or volume |
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What does low density equal? 3 |
More resources per individual Lower genetic diversity Harder to find a mate |
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What does high-density equal? 3 |
Fewer resources for individual Higher genetic diversity Easier to find a mate but more competition |
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Dispersion |
How individuals in a population are distributed in a space at a given time |
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Even / uniform distribution |
Can be observed in animals with Define territories Plant inhibit neighbors can also exhibit uniform distribution |
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Clustered distribution |
And closer distributions individuals are aggregated in discrete groups this distribution frequently occurs in environments that are patchy in terms of resource availability |
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Census |
Account of every individual in a population |
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Survey |
Counting a subset of the population |
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Mark-recapture survey |
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 |
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Dispersal |
Movement of individuals from one area to another |
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Why do individuals disperse? |
To gain Advantage by moving to a new area Escape predators, find mates, find more resources |
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Lifetime dispersal distance |
The average distance an individual move from where it was hatched or born to where produces |
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Populations with high abundance tend to have? |
Start a geographic ranges likely due to Resource availability |
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Dispersal limitation |
The absence of a population from suitable habitats because of barriers to dispersal |
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Habitat corridor |
A strip of favorable habitat located between two large patches of habitat that facilitates dispersal |
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Ideal free distribution |
When individuals distribute themselves among different habitats in a way that allows them to have the same per capita benefit |
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Subpopulations |
When a larger population is broken up into smaller groups that live in isolated patches |
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Metapopulation |
Population of populations in discrete patches linked by migration and Extinction |
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What are three examples of metapopulation? |
Immigration,emigration,extinction |
IEE |
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What are the assumptions of metapopulations 6? |
composed of discrete populations Some degree of migration If migration is high the set of populations will be one large population Physical separation of patches Models are based on persistence and existence of patches not numbers of individuals within patches Regional or landscape scale |
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Source link system |
Collection of patches in which one stable population regularly rescues nearby smaller populations that would otherwise extinct |
Assistance |
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Landscape metapopulation model |
Considers both differences in the quality of suitable patches and quality of and surrounding Matrix |
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