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T4.2-4.3

Dynamic &Resilient Ecosystems/Biodiversity

TermDefinition
succession series of predictable changes that occur in a community over time
pioneer species the first species to populate an area
primary succession when a new patch of land is created or exposed for the first time and organisms must start from scratch
secondary succession series of changes that occur in an area where the ecosystem has been disturbed, but where soil and organisms already exist
climax community final stage of succession; species remain stable
biodiversity the number and variety of different species in an area
keystone species a species that influences the survival of many other species in an ecosystem
extinction the disappearance of all members of a species from Earth
invasive species an organism not native to a particular area that can cause harm to native organisms by outcompeting them or taking over
endangered species a species of animal or plant that is seriously at risk of extinction
background extinction an extinction that occurs over a long period of time
mass extinction an extinction that kills many different species in a very short time
lichens fungi and algae growing in a symbiotic relationship; an important pioneer species.
Created by: DanetteWeisman
Popular Ecology sets

 

 



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