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PCS Liv Env

Ecology Review

TermDefinition
habitat the specific environment of a species
finite (limited) resources food, space, light, oxygen
limiting factors environmental factors such as the amount of dissolved oxygen in the water, light on the forest floor
carrying capacity the number of organisms of one species that an ecosystem can support
niche a species role in an ecosystem
producer all food chains begin with producers; they are autotrophs; largest section of ecology pyramid
autotrophs can make their own food HINT: auto = self
consumers they are heterotrophs
heterotrophs cannot make their own food and instead must obtain food and energy from organic substances
herbivore feeds on plants
carnivore feeds on animals
omivore feeds on both plants and animals
scavenger eats dead organisms
parasites feeds off living organisms
decomposers recycle materials; all food chains end with decomposers; smallest section of ecology pyramid ex. bacteria, fungus
energy only 10% is passed on to the next higher level; 90% is lost to reactions and heat
biodiversity the variety of species in an area; greater the biodiversity, the greater the stability; lost by rainforest clearing, agriculture, over hunting
Created by: Ms.Sala