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Ecology Vocabulary Practice

Word List with 37 words
*By Dictionary.com

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Words in This List

autotroph
noun
organism capable of self-nourishment which uses photosynthesis or chemosynthesis for energy
biomass
noun
amount of living matter in a given habitat
biomes
noun
biotic community of plant and animal species maintained under regional climatic conditions
biosphere
noun
ecosystem comprising the entire earth and the living organisms that inhabit it
camouflage
noun
device used for concealment
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carrying capacity
noun
number of organisms of particular species that can be supported indefinitely in a given environment
climax community
noun
stable community in a successive series which reached equilibrium after having evolved and adapted
commensalism
noun
relation in which one organism obtains benefits from another without damaging it
community
noun
assemblage of interacting populations occupying a given area
competitive exclusion
noun
principle saying two species that compete for the same resources cannot coexist
consumers
noun
organism, usually an animal, that feeds on plants or other animals
decomposer
noun
organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals
density dependent
adjective
size regulation of a population by mechanisms that are controlled by the size of that population
density independent
noun
external limiting events and influences that affect the growth of a population,
desert
noun
arid region with little rainfall that supports only sparse and widely spaced vegetation
ecosystem
noun
system formed by the interaction of a community of organisms with their environment
environment
noun
air, water, minerals, organisms, and other external factors surrounding an organism
food chain
noun
organisms interrelated in their feeding habits, the smallest being fed upon by a larger one
food pyramid
noun
successive levels of predation in a food chain with decreasing numbers of larger predators
food web
noun
series of organisms related by predator-prey and consumer-resource interactions
forest
noun
large tract of land covered with trees and underbrush
habitat
noun
natural environment of an organism
heterotroph
noun
organism requiring organic compounds for its principal source of food
mimicry
noun
close external resemblance of an organism to some different organism
mutualism
noun
relationship between two species of organisms in which both benefit from the association
natural selection
noun
process by which life forms that adapt to environmental pressures tend to survive and reproduce
niche
noun
function of an organism in a community of plants and animals.
nitrogen
noun
a colorless, odorless, gaseous element present in combined form in animal and vegetable tissues
organism
noun
life form composed of mutually interdependent parts that maintain various vital processes
parasitism
noun
relationship between organisms in which one lives off another
population
noun
assemblage of a specific type of organism living in a given area
population curb
noun
factors which restrict population
population growth
noun
increase in the number of people who inhabit a territory
prairie
noun
extensive slightly undulating tract of land
predation
noun
relation between animals in which one organism captures and feeds on others
primary consumer
noun
in the food chain, an animal that feeds on plants
producers
noun
an organism that is able to produce its own food from inorganic substances

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