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ecology hanna:)
some flash cards on biology stuff
| Question | Answer |
|---|---|
| Ecology | the scientific study of interactions among organisms and between organisms and their enviroment. |
| Bioshere | part of earth in which life exists including land, water and air or atmosphere. |
| Species | group of similar organisms that can breed and reproduce offspring. |
| Population | group of individuals of the same species that live together |
| community | assemblage of different populations that live together in a defined area |
| Ecosystem | collection of all the organisms that live in a particular place together with their nonliving enviroment |
| autograph | organisms that can capture energy from the sun or chemicals and use it to produce its own food. |
| heterotroph | organism that obtains energy from the foods it consumes |
| food web | network of complex interactions formed by the feeding relationships among the various organisms in the ecosystem |
| trophic level | step in food chain or web |
| biomass | total amount of of living tissue within a given trophic level |
| biogeochemical cycle | prpcess in which elements,chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biospere to another. |
| limiting nutrient | single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem |
| weather | condition on earths atmosphere at a particular time |
| climate | average conditions of temp. and precipation in a certain place |
| green house affect | natural situation in which heat is retained in earths atmosphere by co2, methane, water vapor, and others |
| biotic factor | bio influence on organisms within an ecosystem |
| abiotic factor | physical or nonliving factor that shapes an ecosystem |
| niche | full range of physical and biologicl conditions in which the organism lives and uses them |
| logistic growth | growth pattern in which a populations growth rate slows or stops following a period of exponetial growth |
| carrying capacity | largest # of individuals of a pop. that a given eviro. can support. |
| demography | scientific study of human populations |
| demographic transition | change in population from high birth and death rates to low |
| green revolution | the developement of highly productive crop strains and the use of modern agricutural tech. to increase yields of food crops |
| renewable resource | stuff that can be regenerate quickly and that is replaceble |
| pollutant | harmful material that can enter the biosphere through the land, air, or water |
| biodiversity | biological diversity, the total of the variety of organisms in the biosphere |
| biological magnification | increasing concentrationof a harmful substance in organisms ar higher trophic levels in a food chain or web |
Created by:
lollipopsunshine
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