Transcript powerpoint 97-03

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A plant or animal species small in numbers
and is danger of becoming extinct.
Most common reasons for endangerment:
Overhunting
Intentional extermination
Habitat destruction
Pollution
Introduction of invasive species
Conserve Habitats
 Make space for wildlife
 Reduce, reuse, and recycle
 Plant native plants local to the area
 Control introduced plants and animals
 Join a conservation organization
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Delmarva Fox Squirrel- destruction of
habitat and competition with other
squirrels
 Peregrine Falcon- overhunting and use
of DDT
 Tippecanoe Darter- additions of
chemicals to river and stream systems
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Delmarva
Fox
Squirrel
Peregrine Falcon
Tippecanoe Darter
Bugleweed- destruction of wetlands and
competition for land with exotic species
 Swamp Pink- continuous picking by
humans, over-grazing by deer, and
flooding
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Bugleweed
Swamp Pink
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Invasive Species- an alien species whose
introduction does or is likely to cause economic or
environmental harm or harm to human health.
Introduced Species- a species living outside its
indigenous or native distributional range, and has
arrived in an ecosystem or plant community by
human activity, either deliberate or accidental.
Native Species- a species that’s presence in an
ecosystem is completely natural without human
intervention.
Shipped aboard cargo freights
 Hidden among tourist’s luggage
 Brought in originally to control the
population of another species
 Illegal animal and plant trade
 Exotic plants released from greenhouse
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Interrupt food chains/webs
 Simplify ecosystems, thus making them
less stable
 Cost just the U.S. over $138 billion
annually to control
 42% of endangered species in the U.S.
are endangered because of invasive
species
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Emerald Ash Borer (Agrilus planipennis)originated in Asia and eastern Russia. It is
usually only a minor pest but recently
they have been colonizing in and killing
ash trees. This causes the population of
these trees decline, thus eliminating
habitats for other animals and causing
economic hardship.
Emerald Ash Borer
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Spiny Water Flea (Bythotrephes
longimanus)- Native to northern Europe
and Asia. Introduced to the Great Lakes
through ballast water and has spread
inward. Competes with small fish and
plankton for food sources. It can also
foul fishing lines and downrigger cables.
Spiny Water Flea
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Carrier Pigeon (Columba livia)- native to
Europe. It was introduced as a food
source. Now they cause damage to
buildings and statues because of their
corrosive droppings and can also spread
disease.
Carrier Pigeon
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Black Fellows (Bidens pilosa)- Native to
Central and South America. It is a very
hardy plant that can endure extreme
weather. Introduced through
ornamental reasons. The grass is a major
weed and is a threat to native fauna.
Bidens Pilosa
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Napa Thistle (Centaurea melitensis)Native to Africa and Europe. Introduced
through shipping. Forms dense,
impenetrable strands that displace
native plants. It is further spread through
the transportation of hay and livestock.
Napa Thistle
Reintroduced Species- introducing an
animal to an ecosystem that was
originally there but became extinct in
there are for one reason or another.
 Extirpated Species- species that are
extinct in a specific region or country.
These species are currently not found in
places/regions where they once lived.
However, they are not extinct and exist
in other parts of the world.
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River Otter- Only 30 or 40 were thought
to be left in the state. So to bring the
population back up to a healthy
number, otters were brought up from
Louisiana and introduced into the
environment. The population is
recovering but is still threatened by
tainted water supplies and habitat
destruction.
River Otter
http://www.ehow.com/list_6795321_endangered-animalspennsylvania.html
 http://www.endangeredspecie.com
 http://www.ehow.com/list_7322700_endangered-plantspennsylvania.html
 http://www.invasivespecies.net/database/species/search.asp?sts=s
ss&st=sss&fr=1&sn=&rn=pennsylvania&hci=-1&ei=-1&x=19&y=8
 http://www.nbii.gov/portal/server.pt/community/invasive_species/8
94/pennsylvania/2551
 http://www.invasivespecies.org/resources/DefineIS.html
 http://www.ehow.com/about_5509361_introduction-invasivespecies.html
 http://definitions.uslegal.com/e/extirpated-species%20/
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