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rawr it's ecology
bio stuff
| Question | Answer |
|---|---|
| ecology | the scientific study of interactions amoung organisms and their environment or surroundings |
| bioshpere | part of Earth in which life exists including land, water, and air or atmosphere |
| species | a group of organisms so similar to one another that they can breed and produce fertile offspring |
| population | groups of individuals that belong to the same species and live in the same area |
| community | assemblages of different populations that live in a defined area |
| ecosystem | a collection of all the organisms that live in a particular place together with their nonliving or physical environment |
| autotroph | organisms that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds |
| heterotroph | organisms that rely on other organisms for their energy and food supply |
| food web | network of complex interactions formed by the feeding relationships amoung the various organisms in an ecosystem |
| trophic level | each step in a food chain or food web |
| biomass | total amount of living tissue within a given tophic level |
| biogeochemical cycle | process in which elements, chemical coumpounds, and other forms of matter are passed from one organism to another and from one part of the bioshphere to another |
| limiting nutrient | the substance when an ecosystem is limited by a single nutriennt that is scarce or cycles very slowly |
| weather | the day-to-day condition of Earth's atmosphere at a particular time and place |
| climate | average, year-to-year conditions of temperature and precipitation in a particular region |
| green house effect | natual situation in which heat is retained by a layer of greenhouse gases |
| biotic factor | the biological influences on organisms whithin an ecosystem |
| aibiotic factor | physical or nonliving factors that shape an ecosystem |
| niche | the full range of physical and biological conditions in which an organism lives and the way in which the organism uses thos conditions |
| logistic growth | growth pattern in which a population's growth rate slows or stops following a period of exponential growth |
| carrying capacity | largest number of individuals of a population that a given enivironment can support |
| demography | the scientific study of human populations |
| demographic transition | a dramatic change in birth and death rates |
| green revolution | the development of highly productive crop strains and the use of modern agricultural techniques to increase yeilds of food crops |
| renewable resources | resources that can regenerate if they are alive or can be replenished by biochemical cycles if they are non living |
| pollutant | a harmful material that can enter the biosphere through the land, air, or water |
| biodiversity | the um total of the genetically based variety of all organisms in the biosphere |
| biological magnification | increasing concentration of a harmful substance in organismsat higher trophic levels in a food chain or food web |
Created by:
jaongwiseth
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