Invasive Species
Essential Question
What
How
are invasive species?
do they become invasive?
What
is the impact on human
activities?
What is an invasive species?
Exotic
Species are species that occur
outside of their natural ranges because of
human activity (1).
An
exotic species becomes invasive when it
becomes established in its new environment
and out competes native species (1).
List
three example of a invasive species?
Types of invasive species
Animals
Plants
Pathogens
What is the problem with an
invasive species?
Can
cause an imbalance in the
natural environment (1)..
Out compete native organisms
for resources
Change abiotic factors
Threaten agriculture
Endanger the health of plants
and animals
How do invasive species travel?
Humans
Wind
Water
HumansSome
plane.
Wind-
Can simply carry a organism.
invasives can stow away on a ship or
Seeds can be carried great
distances.
Water- Organisms can be transported on
natural “rafts”

Examples of Invasive Species:





Zebra mussel (Dreissena polymorpha)
Kudzu
Giant Hogweed (Heracleum mantegazzianum)
Asian Tiger Mosquito (Aedes albopictus)
Lionfish (Pterois spp.)
Zebra Mussel
(2)
Originally
from the Caspian and Black Sea.
Introduced to the Great Lakes in 1988.
Cause many problems:
Can
harm other fresh water mussels
Can block intake pipes for power plants
Can cause problems for recreational activities.
Zebra Mussel
Zebra mussels
Covering a Crayfish
(3b)
Zebra Mussel
showing bysall threads(3a)
Kudzu
Kudzu
• also called Japanese arrowroot, It is a
climbing, coiling, and trailing vine native to
southern Japan and south east China. It
occurs as an invasive species in the U.S.
(W.W.II), it is considered a noxious weed that
climbs over trees or shrubs and grows so
rapidly, it kills them by heavy shading. The
plant is edible. It is a problem in northeastern
Australia, and has been seen in isolated
spots in Northern Italy
Giant Hogweed
(2)
Native to Eurasia
Introduced to the United States in 1917.
Originally used as an ornamental plant
It out competes other plants for
resources.
It produces a toxic sap.
Giant Hogweed
Hogweed (4)
Giant Hogweed Video
(4)
Asian Tiger Mosquito
(2)
Originally
from Asia.
Introduced to Hawaii in the late
1800’s.
Continental
Can
United States in 1985.
be a vector for disease.
Ex.
West Nile Virus
Asian Tiger Mosquito (5)
Lionfish
(2)
Native
to the Pacific Ocean
Introduced to the water around the
United States in 1992 through the
aquarium trade.
Preys on native species.
Has poisonous spines.
Lionfish (6)
Lionfish video
(6)
What can you do?
1. Obey the rules. Do not
transport plants and animals
when you travel.
2. Never release pets into the
wild.
3. Learn about invasive species
in your area for identification.
4. Use native plants.
Report
invasive species in your area.
Invasive species watch in New Jersey:
• The brown marmorated stink bug
Halyomorpha halys
(7)
Invasive species watch in Virginia
• The emerald ash borer
Agrilus planipennis
(8)
adult
larvae
Invasive Species watch in Maryland
• The northern snakehead
Channa argus
(9)
CBS Video
http://www.cbsnews.com/videos/inva
sive-species-spreading-acrossamerica-50114055/
Predator – Prey
Relationships
Ivasive Species Activity.