EEMB midterm 1 Review

EEMB midterm 1 Review - EEMB Review Definitions: Abiotic...

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EEMB Review Definitions: Abiotic Factors: Abiotic components are the nonliving components of the biosphere. Chemical and geological factors, such as rocks and minerals, and physical factors, such as temperature and weather, are referred to as abiotic components. Abundance: the number of individuals in a population. Biogeographic region: an area of plant and animal distribution having similar or shared characteristics all throughout. Biome: a complex biotic community characterized by distinct animal and plant species and maintained under climatic conditions of the region. Biotic Factors: anything that effects the living organism that is itself alive. Carrying Capacity: the maximum equilibrium number of organisms of a particular species that can be supported indefinitely in a given environment. Climate: the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. Commensalism: organisms living with, on or in another, where one organism benefits and the other one is neutral. (+,0) Community: an assemblage of interacting populations occupying a given area. Competition: the struggle among organisms, both of the same and of different species, for food, space, and other vital requirements. Competition coefficient: the effect of one species on another. Competitive exclusion principle: when two species compete for the same critical resources within an environment, one of them will eventually outcompete and displace the other. The displaced species may become locally extinct, by either migration or death, or it may adapt to a sufficiently distinct niche within the environment so that it continues to coexist noncompetitively with the displacing species. Competitive release: the expansion of a species’ ecological niche associated with the lack of competition with other species. Demographic Factors: Density: The number of individuals per unit of habitat
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Density-dependent control: a factor that increases its impact on the affected population as the density of the population increases. Density-Independent Control: a factor that’s impact remains constant regardless if the affected population is increasing or decreasing. Dispersal: the distribution of abiotic and biotic factors throughout an environment, habitat, or a population Disturbance: an event that results in a sustained disruption of an ecosystem’s structure and function, generally with effects that last for time periods longer than a single seasonal growing cycle for natural vegetation cover. Distribution: a spatial or temporal array of organisms or events that are in a given ecosystem. Ecology:
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This note was uploaded on 04/22/2008 for the course EEMB 2 taught by Professor Evan during the Spring '07 term at UCSB.

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EEMB midterm 1 Review - EEMB Review Definitions: Abiotic...

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