Figure 6.16
Hawaiian honeycreepers – the original finch (now extinct) probably ate insects and nectar
cnx.org Concepts in Biology
An event caused by physical, chemical, or biological agents that results in changes in population size or community composition is a disturbance. Natural ecosystem disturbances include hurricanes, ice storms, tsunamis, tornadoes, volcanic eruptions, and forest fires.
Note to students: Please browse the U.N. Millennium Ecosystem Assessment to view the summary of findings about the effect of human disturbance on global ecosystems.
Lake Succession
A series of changes (primarily increased
sedimentation and vegetation)In which a lake progresses from
oligotrophicto
mesotrophic to
eutrophicto
terrestrial
Newmark WD. 1995. Conservation Biology. 9(3): 512-526
Extinction of Mammal Populations in Western North American National Parks
Bryce CanyonCrater LakeGlacier-Waterton LakesGrand CanyonKootenay-Banff-Jasper-YohoLassen VolcanicManning ProvincialMount RainierOlympicRocky MountainSequoia-Kings CanyonYellowstone-Grand TetonYosemiteZion
Extinction of Mammal Populations in Western North American National Parks
