Download Nonrenewable Plants and Animals Due to Extinction

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Transcript
Nonrenewable
Plants and Animals
Due to Extinction
Passenger Pigeon

early 1800s


over-hunting



using increasingly effective
methods to catch both mature
and juvenile birds
led to rapid extinction
1900


existed in huge flocks (billions) all
over North America.
last bird recorded in the wild
1914

the last Passenger Pigeon died in
the Cincinnati Zoo
Carolina Parakeet

Extinction due to:

challenges to its diet



challenges to its habitat


destruction of the birds’ forest
habitats
bright set of feathers


large flocks of these birds fed on
fruit and grain
farmers were protective of their
crops
sought after as hat accessories
The last of them, a captive
specimen in the Cincinnati Zoo,
died in 1918.
Toolache Wallaby


Common in Australia until 1910
population slowly dwindled

hunting





few individuals lived in the wild
1982


predation by foxes
habitat destruction
1924


prized for its fur
game trophy
numerous surveys failed to
observe any remaining
specimens
species declared as extinct
Thick-billed Ground Dove


was identified only from two
specimens collected from the
Solomon Islands in 1882 and
in 1927
Its decline is thought to be due
to:



new predators being
introduced into its habitat
the destruction of forests in
which it lived
after unsuccessful attempts to
find the bird, it was designated
extinct status in 2005
St. Helena Olive


flowering plant endemic to the island of
St. Helena
1977



the tree died in 1994



only one tree was found in the wild
a single cutting was successfully cultivated
the survival of the species depended on a
handful of seedlings derived from the
cultivated cutting that eventually perished
last of the species died in December
2003
factors responsible for its extinction:



Deforestation
over-grazing
the tree’s self-incompatibility
Arunchal Hopea Tree



small tree
harvested
extensively for the
construction of
house posts in India
declared extinct in
1998
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