non-living or physical factors, such as temperature or rainfall, that affect the population sizes and distribution or organisms
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Abundance
the number of organisms of a particular species in an area, related to the population size
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Biodiversity
a measure of the variety of organisms in an area
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Biotic factors
factors affecting the abundance and distribution of organisms that are caused by other organisms, such as through competition for food
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Community
refers to all the populations or organisms that live in an area or ecosystem
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Ecology
the study of living organisms and their environment
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Ecosystem
an ecosystem consists of all the organisms and physical factors in a fairly self-contained area, such as a lake or desert
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Line transect
a line along which quadrats are placed to sample organisms
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Quadrat
a square frame used for sampling the abundance and distribution of organisms
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Biomass
the mass of living material, such as the mass of a living organism
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Primary consumer
an animal that eats plants
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Trophic level
a feeding level in a food chain or food web, such as producer, primary consumer
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Denitrifying bacteria
soil bacteria that convert nitrates in the soil to nitrogen gas which is released into the atmosphere
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Nitrifying bacteria
soil bacteria that convert ammonium ions to nitrate ions, and nitrate ions to nitrate ions, important in the nitrogen cycle
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Nitrogen-fixing bacteria
bacteria found in the soil and in root nodules of some plants that can convert atmospheric nitrogen into a form of nitrogen that plants can use
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Eutrophication
the addition of nutrients to water, which may lead to water pollution
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Leaching
the loss of dissolved mineral nutrients in soil water as it soaks deep into the ground beyond the reach of plant roots
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Acid rain
rain that contains higher than normal concentrations of dissolved acidic gases, such as suffer dioxide and nitrogen oxides, which causes the rain to have a lower pH than normal
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Other cards in this set
Card 2
Front
the number of organisms of a particular species in an area, related to the population size
Back
Abundance
Card 3
Front
a measure of the variety of organisms in an area
Back
Card 4
Front
factors affecting the abundance and distribution of organisms that are caused by other organisms, such as through competition for food
Back
Card 5
Front
refers to all the populations or organisms that live in an area or ecosystem
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