unit 10 ecology

biomass

a measurement of the amount of living biological matter in an ecosystem

trophic level

is the energy position held by an organism in a food chain

producer (autotroph)

plants which produce food through photosynthesis

consumer heterotroph

cannot create its own food therefore needs ro ear foe a source of energy

species

organizsm which can mate and make fertile offspring

habitiat

the naturla environmental area that a particular species of organism live

niche

the role or job an organism within its enironment

nitrogen fixation

atmosphere nitrogen is converted by “nitrogen fixing bacteria” into a usable form for plants and animals

greenhouse effect

using green house gases such as co2 to trpa heat on earth

fossil fuels

non renewable resourxes (oil, coal, natural gas) which release carbon dioxide into the atmosphere

limiting factors

is anything in a population that restricrs the populatioin size

exponential growth

population numvers increase faster and faster as time progresses

logistic growth

happens when a population is limited in resources and starts to decrease in size

deforestation

is thenpermanent destructionof forests caused erosison and water runoff

biodiversity

the variety of life in the world or in the habitiat / ecosystem

acid rain

caused by sukfates in fatory smoke gettung into the atmosphere and condensing to a form of acidic rain

chlorofluorocarbons

chemicals used inrefrigeraters and aerosal products that harm the ozone layer