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Ecology- Cremo
Flash cards for ecology
| Question | Answer |
|---|---|
| Ecology | scientific study of interactions among organisms and between organisms and their enviornment |
| biosphere | part of Earth in which life exists including land, water, and air or atmosphere |
| species | group of similar organisms that can breed and produce fertil offspring |
| population | group of individuals if the same species that live in the same area |
| community | assemblage of differnt populations that live together in a defined area |
| ecosystem | collection of all the organisms that live in a particular place, together wiht their nonliving enviornment |
| autotroph | organsim that can capture energy from sunlight or chemicals and use it to produce and use it to produce its own food from inorganic compounds; also a producer. |
| 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 an ecosystem |
| trophic level | step in a food chain or food web |
| biomass | total amount of living tissue within a given trophic level |
| biogeochemical cycle | process in which elements, chemical compounds, and other forms of matter are passed from one organism to annother and form one. |
| limiting nutrient | single nutrient that cycles very slowly limiting the growth of organisms in an ecosystem |
| weather | condition of earths atmosphere at a particular time and place |
| climate | average year after year conditions of temperature and precipitation in a particular region |
| green house effect | natural situation in which heat is retained in earths atmosphere by carbon dioxide, methane, water vapor, and other gases |
| biotic factor | biological influence on organisms within an ecosystem |
| abiotic factor | physical or nonliving factor that shapes an ecosystem |
| niche | full rage of physical and biological conditions in which an organism lives and the way in which the organism uses those condition |
| logisitc growth | growth pattern in which populations groth rate slows or stops following a period of exponetial growth |
| carrying capacity | largest # of people of a popluation that a given enviornment can support |
| demography | scientific study of human populations |
| demographic transition | change in a population from high birth and death rates to low rates |
| green revolution | the development of highly productive crop strains and the use of modern agricultural techniques to increase yeilds of food crops |
| renewable resource | resource that can regenerate quickly and that is replacable |
| pollutant | harmful material that can enter the biosphere through the land, air or water |
| biodiversity | biological diversity; the sum total of variety of organisms in the biosphere |
Created by:
Acremo
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