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Biology ch. 2

TermDefinition
ecology scientific discipline in which the relationship among living organisms and the organisms have with their enviorment are studied
biosphere is the protion of the earth that supports life
biotic factors the living factors in a organism's enviorment
abiotic factors the nonliving factors in an organism's enviorment
ecologist look at different levels of organization or smaller pieces of the biosphere
populations organisms of a single species that shares the same geographic location at the dame time makeup
community group of interacting populations that occupy the same geographic area
ecosystem biological community and all the abiotic factors that affect it
biome large group of ecosystems that share climate and have similar types of communities
habitat area where an organism lives
niche role or position that an organism has in its enviorment
predation act of one organism has in it enviorment
symbiosis relationship exist when 2 or more species live together
commensalism relationship where 1 organism benefits other doesn't ex: clownfish and sea anemones
mutualism 2 or more organisms that live together and benefit ex: lichen and trees
parasitism 1 benefits and the expense of another ex: ticks and flees
autotrophs is an organism that collects energy from sunlight and produces food
heterotrophs organims that gets its energy requirements by consuming others
detrivores eats fragments of dead matter
decomposers which consume another
food chain simple model that shows how energy flows
trophic level are simply represented of the flow of energy
food web model that shows the interconnectioned food chain
biomass total mass of living matter at each trophic level
matter anything that takes up space and has mass
nutrient chemical substance that an organism must obtain from its enviorment
biogeochemical cycle the exchange of matter through the biosphere
nitrogen fixation capture and conversion of nitrogen into a form that is usable
denitrification some soil bacteria convert fixed nitrogen compounds back into nitrogen gas
Created by: Skyhawk16
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