Environmental Science Final Exam 24-25

The variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem

• keystone species
• pioneer species
• biodiversity
• population

A species that is critical to the functioning of the ecosystem in which it lives because it affects the survival and abundance of many other species in its community

• endangered species
• threatened species
• pioneer species
• keystone species

A species that has been identified to be in danger of extinction throughout all or a significant part of its range and that is thus under protection by regulations or conservation measures

• endangered species
• threatened species
• pioneer species
• keystone species

A species that has been identified to be likely to become endangered in the foreseeable future

• endangered species
• threatened species
• pioneer species
• keystone species

The illegal harvesting of fish, game, or other species

• poaching
• urbanization
• infrastructure
• leaching

A species that is native to a particular place and that is found only there

• keystone species
• pioneer species
• endemic species
• threatened species

Succession that begins in an area that previously did not support life

• climax community
• primary succession
• secondary succession
• tertiary succession

The process by which one community replaces another community that has been partially or totally destroyed

• climax community
• primary succession
• secondary succession
• tertiary succession

A species that colonizes an uninhabited area and that starts an ecological cycle in which many other species become established

• keystone species
• pioneer species
• endemic species
• threatened species

A final, stable community in equilibrium with the environment

• climax community
• primary succession
• secondary succession
• tertiary succession