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Ecology Alice Hansen

Study of the environment

TermDefinition
Ecology study of interactions among organisms and between organisms in their environment
Niche an organisms ecological role
Habitat the area where an organism lives, including the biotic and abiotic factors that affect it
Producer/autotroph organism that capture energy from sunlight or chemicals and uses it to produce food from inorganic compounds
Consumer/heterotroph organisms that obtain energy form the food it consumes
Herbivore/primary consumer organisms that obtain energy form eating producers
Carnivore/secondary consumer organisms that obtain energy form eating consumers
Omnivore organisms that obtain energy by eating both plants and animals
Decomposer organisms that break down and obtain energy from dead organic material
Detritivore organisms that feed on plant and animal remains and other dead matter
Biotic biological influences
Abiotic physical or non-living factors that shape the ecosystem
Organism living factors in the ecosystem
Population group of individuals of the same species that live in the same area
Community groups of species living together in a specific area
Ecosystem organisms that live in a particular area and their interaction with their non-living (abiotic) parts of the envirnoment
Biosphere part of Earth in whcih life exists including, land, water, and air or atmosphere
Photosynthesis process by which plants and some other producers use light energy to make glucose and oxygen
Respiration the release of energy
Chemosynthesis proces by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates
Biomass/energy pyramid/ecological pyramid total amount of living tissue within a given trophic level
Trophic level feeding level in a food chain or food web
Food chain series of steps in an ecosystem in which organism transfer energy by eating of being eaten
Food web network of complex interactions formed by the feeding relationships among the various organims in an ecosystem
Bioaccumulation/biomagnification increasing concentration of a harmful substance in organisms at higher trophic level in a food chain or food web
polluntant harmful material that can enter the biosphere through land, air, or water
population density the number of individauls per unit area
predation interaction in which one organism captures and feeds on another organism
predator-prey relationship mechanism of population control in which a population is regulated by predation
symbiosis relationship in which two species live closely together
transpiration loss of water from a plant through its leaves
sustainable development using natural resources at a rate that does not deplete them
tropism response of a plant to an environmental stimulus
taxis response of an animal to an environmental stimulus
detritus particles of organic material that provide food for orgamisms at the bse of an estuary's food web
denitrification conversion of nitrates into nitrogen gas (N2)
demography scientific study of human population
demographic transiition change in a population from high birth and death rates to low birth and death rates
deforestation destruction of forest
density-dependent limiting factor limiting factor that depends on population size
density-independent limiting factor limiting factor that affects all populations in similar ways, regardless of population size
competition aka competitive exclusion principal ecological rule that states no two species can occupy the same exact niche in the same habitat at the same time.
non-native species/exotic species a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental.
Created by: alice.hansen