My lesson

 0    25 schede    paramoregirl3000
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succession
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changes in an ecosystem as other individuals die out and are replaced
primary succession
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occurs when no soil exists
pioneer species
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first species to inhabit
secondary succession
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happens when primary succession has been interupted by human or natural occurances
Niche
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organisms role in its einviroment
habitat
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organisms einviroment
predatation
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eating organisms, eating the prey
symbiosis
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living together
mutualism
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both species benefit
commensalism
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one species benefits the other is neither harmed or helped
parasitism
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one species benefits but the other is harmed
two types of population growth
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exponential logistic
why would population wroth slow down?
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runing out of resources
carrying capacity
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number of individuals the einviroment can support
limiting factors
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conditions that cause growth to slow down
density dependent
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these factors only affect the population when the population is large
density independent
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any factor that affects the whole population the same no mater the population size
autotroph
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organisms that use energy from the sun or energy stored in chemical compuonds to manufactor their own nutrients
ecosystem
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interactions among population n a community: the communities physical surroundings, or abiotic factors
heterotroph
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organisms that cannot make their own food and must feed on other organisms for energy and nutrients
biomag
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DDT
Deforestation
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cutting down trees
biodiversity
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variety of life in an area. usually measured as the number of species that live in an area
biology
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study of life
levels of organiaztion in biology
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individual, popuation, community, ecosystem
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