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Ecology flash cards
ecology
| Question | Answer |
|---|---|
| Ecology | is the scientific study of interactions among organisms and between organisms and their enviroment |
| Biosphere | contains the combined portions of the planet of which all life exisits |
| species | is a group of organisms so silmilar to one another that they can breed and produce ferile offsprings |
| population | is groups of individuals that belong to the same species and live in the same area |
| community | is a assemblags of different polpulations that live together in a defined area |
| ecosystem | of all the organisms that live in a particular place |
| autotroph | are organisms that use energy from the enviroment to fuel the assembly of simiple inorganic compounds into a complex organic molecules |
| heterotroph | organisms that rely on other organimsms for energy and for food |
| food web | are relationships among the various organisms in an ecosystem to form a network |
| trophic level | is each step in the food chain |
| biomass | total amount of living tissue within a given trophic level |
| biogeochemical cycle | process in which elements chemical compunds and other forms of matter are passed from one organisms to another and form one part of the biosphere to another |
| limiting nutrient | single nutrient that either is scarce or 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 precipitations in a particular region |
| green house effect | natural situation in which heat is retained in earths atmosphere by carbnon dioxide, methane, water vapor and other gasses |
| biotic factor | bilogical influences on organisms within an ecosystem |
| abiotic factor | physical, or nonliving, factor that shapes an ecosystem |
| niche | full range of physical and biology conditions in which an organisms lives and the way in which the organisms uses those conditions |
| logistic growth | growth pattern in which a populations growth rate slows or stops following a period of exponetial growth |
| carrying capacity | largest number of individuals of a population that a given enviroment can support |
| demography transition | change in population from high birth and death rates to low birth and death rates |
| demography | scientific study of human populations |
| green revolution | the delopment of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops |
| renewable resource | resources that can regenerate quickly and that is replaceable |
| pollutant | harmful material that can enter the biosphere through air, land and water |
| biodiversity | bilogical diversirty: the sum total of the variety of organisms in the biosphere |
| biological magnificant | increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web |
Created by:
jackewles
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