Chapter 23: Conservation Biology Flashcards
How many species are threatened with extinction
28 000
T/F The rate at which earth is losing species is accelerating
True
Extinction rates from the fossil record
Background rates
T/F Humans have been causing extinctions for millennia
True. They’re all true you should know this by now
Who does extinction effect
Prey, predator, and mutualistic partners
The stronger the interactions of a species the _______ the effect of its removal is
Greater
Species introductions has increased by 5-fold over the past ________
Century. Sorry this is just a way of dropping this fact in
Threat to biodiversity: Cod example. Getting overfished because of technical advances
Overexploitation
Threat to biodiversity: Tasmanian devil threat (Facial tumour _______)
Disease
Threat to biodiversity: Accelerated by humans
Climate change
Threat to biodiversity: Humans have modified 60% of Earth’s land surface. Most important factor
Habitat loss
Breaking up continuous habitat into patches
Fragmentation
Changes that reduce quality of habitat for many but not all species
Habitat degradation
