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  2. Population - Wikipedia

    en.wikipedia.org/wiki/Population

    In ecology, a population is a group of organisms of the same species which inhabit the same geographical area and are capable of interbreeding. [2] [3] The area of a sexual population is the area where interbreeding is possible between any opposite-sex pair within the area and more probable than cross-breeding with individuals from other areas.

  3. Group size measures - Wikipedia

    en.wikipedia.org/wiki/Group_size_measures

    Crowding is the size (the number of individuals) of a group that a particular individual lives in (equals to group size: one for a solitary individual, two for both individuals in a group of two, etc.). Practically, it describes the social environment of one particular individual. This was called Individual Group Size in Jovani & Mavor's (2011 ...

  4. Population ecology - Wikipedia

    en.wikipedia.org/wiki/Population_ecology

    A group of individuals within an investigator-delimited area smaller than the geographic range of the species and often within a population (as defined above). A local population could be a disjunct population as well. Subpopulation: An arbitrary spatially delimited subset of individuals from within a population (as defined above). Immigration

  5. Community (ecology) - Wikipedia

    en.wikipedia.org/wiki/Community_(ecology)

    A bear with a salmon. Interspecific interactions such as predation are a key aspect of community ecology.. In ecology, a community is a group or association of populations of two or more different species occupying the same geographical area at the same time, also known as a biocoenosis, biotic community, biological community, ecological community, or life assemblage.

  6. Size of groups, organizations, and communities - Wikipedia

    en.wikipedia.org/wiki/Size_of_groups...

    Size (the number of people involved) is an important characteristic of the groups, organizations, and communities in which social behavior occurs. [1]When only a few persons are interacting, adding just one more individual may make a big difference in how they relate.

  7. Glossary of ecology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_ecology

    The number of individuals of a species living in a defined area. population distribution See range. population ecology A branch of ecology which deals with the dynamics of populations within species, and the interactions of these populations with environmental factors. Also called autecology. population size

  8. Species evenness - Wikipedia

    en.wikipedia.org/wiki/Species_evenness

    In community A, one of the species constitutes 80% of the individuals in the community, while the remaining three species comprise only 20% of the individuals in the community. In community B, the number of individuals are evenly divided among the four species, (25% each). Therefore, community A has lower species evenness than community B. When ...

  9. Minimum viable population - Wikipedia

    en.wikipedia.org/wiki/Minimum_viable_population

    The so-called "50/500 rule", where a population needs 50 individuals to prevent inbreeding depression, and 500 individuals to guard against genetic drift at-large, is an oft-used benchmark for an MVP, but a recent study suggests that this guideline is not applicable across a wide diversity of taxa.