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ecologybrown
| Question | Answer |
|---|---|
| what is ecology | the scientific study of interactions among organisms and between organisms and their enviornment or surrondings |
| what is biosphere | contains the combined portions of the planet in which all of life exists including land water and air or atmosphere |
| what is species | a group of organisms so similar to one another that they can breed and produce fertile offspring |
| what is population | groups of individuals that belong to the same species and live in the same area |
| what is community | assemblages of different populations that live together in a defined area |
| what is ecosystem | a collection of all the organisms that live in a particular place together with their non living or physical enviornment |
| what is autotroph | plants some algae and certain bacteria can capture energy from sunlight or chemicals and use that energy to produce food |
| what is heterotroph | organism that rely on other organisms for their energy and food supply |
| what is food web | when the feeding relationships among the various organisms in a ecosystem form a network of complex interactions |
| what is trophic level | each step in a food chain or food web |
| what is biomass | the total amount of living tissue within a given trophic level |
| what is biogeochemical cycle | elements chemical compounds and other forms of matter are passed from one organism to another and from one part of the biosphere to another |
| what is limiting nutrient | when an ecosystem is limited by a single nutrient that is scarce or cycles very slowly |
| what is weather | the day to day condition of earths atmosphere at a particular time and place |
| what is climate | the average year after year conditions of temperature and percipitation in a particular region |
| what is green house effect | the natural situation in which heat is retained by this layer of green house gases |
| what is biotic factor | the biological influences on organisms within an ecosystem |
| what is abiotic factor | physical or non living factors that shape ecosystems |
| what is niche | the full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions |
| what is logistic growth | when a populations growth slows or stops following a period of exponential growth |
| what is carrying capacity | the number that represents the largest number of individuals that a given enviornment can support |
| what is demography | the scientific study of human populations |
| what is demographic transition | a dramatic change in birth and death rates |
| what is green revolution | greatly increasing the worlds food supply |
| what is renewable resource | can regenerate if they are alive or can be replenished by biochemical cycles if they are non living |
| what is pollutant | a harmful material that can enter the biosphere through the land air or water |
| what is biodiversity | the sum total of the genetically based variety of all organisms in the biosphere |
| what is biological magnification | concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web |
Created by:
matthewbrown
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