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42 terms

Ecosystem

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ecosystem
A community and its physical environment together
biome
a large scale ecosystem
community
all the populations of organisms living in the same environment
habitat
a place in an ecosystem where a population lives
niche
the role each population has in its habitat
consumer
an organism in a community that must eat to get the energy it needs
decomposer
a consumer that breaks down the tissues of a dead organism
producer
a organism that makes its own food
food web
shows the interaction among many different food chains in a single ecosystem
food chain
the way in which the organisms in an ecosystem interact with one another according to what they eat, eating the organisms below it
symbiosis
a long term relationship between different kinds of organism
grassland
A biome's whose main plants are grasses.
tundra
A treeless biome between the icecap and the tree line of Arctic regions, having permanently frozen subsoil.
biotic
Of or having to do with life or living organisms or produced or caused by living organisms.
abiotic
Nonliving
predator
An organism that lives by preying on other organisms.
organism
An individual form of life, such as a plant, animal, bacterium.
freshwater
Of, relating to, living in, or consisting of water that is not salty
mountain
a landform higher than a thousand feet
desert
A barren biome with less than 10 inches of precipitation each year with little rainfall, extreme temperatures, and sparse vegetation.
individual
a single organism in an environment
population
all the individuals of the same kind, living in the same environment
herbivore
an animal that eats only plants as food
carnivore
an animal that eats other animals as food
omnivore
an animal that eats both plants and animals as food
prey
an animal that is hunted, killed and eaten by a predator animal
energy pyramid
shows the amount of energy that is available to pass from one level of the food chain to the next
endangered species
a population of organisms that is likely to become extinct if steps are not take to save it
extinct
no longer in existence
overpopulation
a situation in which too many animals compete for the natural resources in an area
tropical rain forest
a biome with lots of rainfall, sun light, trees and warm temperatures
deciduous forest
a biome based on trees that lose their leaves each fall
taiga
a biome made up mostly of needle-leaved evergreens, due to long winters and cold temperatures
compotition
The demand by two or more organisms for limited environmental resources, such as nutrients, living space, or light
instict
A behavior that an organism inherits.
learned behavior
a behavior an animal learns from its parents
threatened
describes a population of organisms that are likely to become endangered if they are not protected
interdependent
depending on each other
types and numbers of plants
determines the types and numbers of animals in an ecosystem
population decline
a situation in which the number of organisms decreases due to natural and unnatural causes
human activity
the most common cause for population decline
ten percent
the amount of energy passed from one level of a food chain to another