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Unit 9 Disruptions

Disruptions in Ecosystems

TermDefinition
abiotic factor nonliving (sunlight, water, temperature)
biotic factor living (plants, animals, bacteria)
producer (autotroph) – makes its own food (plants)
consumer (heterotroph) – eats other organisms
primary consumer herbivore; eats only plants
secondary and tertiary consumers carnivores
decomposer breaks down dead organisms (fungi, bacteria)
food chain one path of energy flow
food web many connected food chains
energy pyramid shows energy decreasing at each level; most abundant energy in producers directly from the sun, least present in the predators
trophic level position in food chain
biomass total living mass in an area
succession ecosystem change over time
primary succession no soil (lava, bare rock)
secondary succession soil remains (fire, flood) takes less time to restore the ecosystem
biodiversity variety of life
carrying capacity max population an area can support
invasive species harmful nonnative species
predation predator eats prey
competition organisms fight for resources
symbiosis close relationship between species
limiting factor any resource in an environment that restricts the size, growth, or distribution of a population. It is essentially anything that prevents a population from growing indefinitely and keeps it in balance with its ecosystem
Created by: user-1988308
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