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Current mega extinction
is caused by a species compared to some major external force
What's happening to Tropical Rain Forest
-tough environment to live in for humans
- continues to decline
1) Ecosystem destruction
2) ecosystem degradation
-also includes climate
3) direct hunting and harvest
4) introduced species
ecosystem destruction
-destroy it and let it come back
-houses, roads, lawns, mining, nuclear bombs
ecosystem degradation
-disturbances; road salt, light messes with animals biorhythm (light should only be in the day), pesticides, fragmentation (fencing), ozone depletion
speed of climate change
is currently very fast
life wont have time to adjust and adapt & migrate
for example, everglades climate park will be flooded in a century because of climate change
direct hunting and harvest
- demand for a resource
-rosewood, ebony, mahogony, ivory
- people collect rare things
-ex: had to get rid of buffalo for trains
-buffalo--from pop. 60 mill-->85
-passenger pigeon-- from 5 nil--> extinct
-species need a certain amount of pop. to survive
introduced species
-invasive species change landscape, they have no competition, so they explode
1) Laws to protect endangered species and threatened
-have to document and prove your case, if its not abundant, can be considered endangered orphin--species nobody cares about
ex: bee
2) ecosystem protection-- more broader view
3) CITES (treaty): protect species species
4) Educate people on value of biodiversity
-human centered argument --free services, meds, food/flaws. aesthetics, biophilia (hardwired to interact with natures spiritual
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