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18 Cards in this Set
- Front
- Back
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acid rain
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Rain that is more acidic than pH 5.6
due to wood/coal/fossil fuels releases oxides of sulfur/nitrogen that react w/ H20 in the atmosphere, forming sulfuric/nitric acid causes calcium, other nutrients to leach from the soil - nutrient deficiencies affect health of plants, limits growth freshH20 especially sensitive due to low concentrations of bicarbonate (buffer) |
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biogeography
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The study of the past and present distribution of species.
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biological magnification
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A trophic process in which retained substances become more concentrated with each link in the food chain.
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genetic diversity
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if a species becomes extinct, then a species may have lost some of the genetic diversity that makes microevolution possible - erosion of genetic diversity is detrimental to overall adaptive prospects of the species - also affects humans - losing plants that might be used for medicine = bad
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species diversity
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extinction is a natural phenomenon but the rate of extinction is very worrying
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ecosystem diversity
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the local extinction of a species have have a negative feedback on the overall species richness of the community - each ecosystem has characteristic patterns of energy flow/chem. cycling that can affect the whole biosphere
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biotic factors
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living factors (organisms) of an environ.
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abiotic factors
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nonliving factors - temperature, sunlight, wind, rocks, soil
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cryptic coloration
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camouflage by coloring
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aposematic coloration
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a poisonous animal is brightly colored as a warning to other animals
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batesian mimicry
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a nonpoisonous animal has evolved to mimic the coloration of a poisonous animal
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mullerian mimicry
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2 bad tasting species resemble each other, ostensibly so that predators will avoid them equally
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competitive exclusion principle
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when 2 species are vying for a resource, eventually the 1 w/ the slight reproductive advantage will eliminate the other
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ecological niche
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the sum total of biotic/abiotic resources in its environment
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resource partitioning
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The division of environmental resources by coexisting species such that the niche of each species differs by one or more significant factors from the niches of all coexisting species - 2 lizards w/ the same diet live in a tree but some live in high and some live in low branches - avoid competition
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interspecies competition
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competition of individuals of different species for same resources
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character displacement
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tendency for characteristics to be more divergent in sympatric populations of two species than in allopatric populations of the same two species - beaks - caused by natural selection
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commensialism
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symbiotic relationship where 1 organism benefits and the other is not harmed/helped
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