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large, flightless bird, native to Mauritius. Nested on the ground, humans brough dogs and pigs that ate all the _____ eggs, quickly became extinct
used to be most abundant bird in North American. once about 5 million, took us 50 years to kill them all
simplification (of ecosystems)
what humans do to ecosystems by destroying species, feedback loops, interactions between organisms; number of species is reduced, biodiversity reduced, simpler version of what we had before
exotic species (know examples also)
a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental; i.e. zebra mussel, nutria, water hyacinth, brown tree snake
habitat loss (destruction)
process in which natural habitat is rendered functionally unable to support the species present, one of the greatest causes of species extinction
large areas of habitat are reduced to smaller patches, which are now isolated from one another by new and different habitats, like fields, roads, farms and citites. tiny islands of natural habitat surrounded by a hostile sea. one of the greatest causes of species extinction
deforestation (tropic vs. termperate pattern)
the temporary or permanent clearance of large expanses of forests for agriculture or other uses
theory of island biogeography
the equilibrium number of species on an island will be a balance between the opposing forces of immigration and extinction
a factor on the rate of immigration; how a species immigrates by chance (squirrel on a log)
rate of immigration
depends on distance from island to mainland and dispersal ability of the colonizers
species that breeds in North America and spends the non-breeding season south of the Tropic of Cancer
became a science in 1980s, multidisciplinary science that focuses on the study of how humans impact organisms and on the development of ways to protect bioligical diversity
a purposeful activity with the goal to maintain and improve the state of an environmental resource affected by human activities
the use of a resource that reduces the supply (removing water from a source like a rive, lake or aquifer) without returning and equal amount
individuals may use (i.e. observe), yet not consume, certain living ocean resources, like whale watching or scuba diving
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