arnold says: do it now! what is an exotic species?
DESCRIPTION
What is an Introduced (exotic) Species? Organisms that have either intentionally or accidentally been released into this country that are (non-native)TRANSCRIPT
Arnold Says: Do it now! What is an exotic
species? What is an invasive
species? Do you know any
examples?
What is an Introduced (exotic) Species?
Organisms that have either intentionally or accidentally been released into this country that are (non-native)
Ring Neck Pheasant
Brown Trout
What is an Invasive Species?
Invasive Species- Exotic organism that takes over an environment and disrupts the community by out-competing or destroying native species.
Overall negative impact to ecosystem.
Kudzu Also known as the vine that
ate the south- can grow 1 foot a day.
Introduced from Vietnam in the southern US to control erosion.
Quickly got out of control and spreads 150,000 acres annually.
Negative Impact: Chokes out native plants
Asian and Silver Carp Imported
from Asia for food and algae control
Can grow to 100 lbs and jump 10 feet out of the water.
What impact do they have on the environment?
Ouch! Asian Carp Video Turn a Negative into a positi
ve
European Gypsy Moth Introduced by that
guy to try and make silk Defoliate trees,
leaving them weak and eventually they die
All over NE US Eat 1 square foot
per day per bug
Purple Loosestrife
Occurs in every state except Florida
Forms dense coverage of wetland habitat that displaces native veg and is of a lesser nutritional value
Each plant can produce up to 3 million seeds per year!
Introduced for ornamental and medicinal purposes and STILL SOLD TODAY!
Chestnut Blight
A fungus transported from an Asian nursery delivery
Devastated all American Chestnut Trees in early 1900s. 1 in 4 hardwood trees in the Appalacian Range used to be an American Chestnut, but they are all gone
Enters the tree through wounds and cracks and quickly spreads killing the tree.
A few small trees survive, but are eventually killed.
European Starling
Introduced by Shakespeare enthusiasts in 1890
Outcompetes native species and destroys crops
Spreads rapidly, extremely successful in North America
Stink Bugs! Introduced
accidentally around the summer of 1998, possibly on container ship from Asia.
First seen in US in Allentown, PA
No natural predators because of the smell and distaste to other animals
Negative Impact: Agricultural pest and indoor pest (seeks warm during cold weather).
Red Imported Fire Ant
Attack and eat a variety of ground nesting animals
Spread via mating flights and accidentally by humans
Video Electricity Raft
Zebra Mussles Mollusk from Russia Has invaded the Great
Lakes Negative Impact:
Clogs drains and covers beaches, boats, and other animals.
What is a vector? Vector- This is the
medium (method) through which an invasive species gets to a location.
How does the Zebra Mussel affect the food web in the Great Lakes?
LionfishOuch!!! Ouch!
!!Ouch!!!
Vector?
Burmese Python Released by pet
owners that can’t handle them.
Everglades similar to home environment.
Negative Impact: Outcompete the top predators.
Python v. Gator Video
Get out your HW! What is an invasive species? How is it different from an exotic? What is a vector? Give 3 examples.
What would you do…? Before the bell rings…start on this below. In your notes, write down and describe at
least 4 ways you would control an invasive species in your area? Be creative.
Control Methods
Manual Chemical Biological Cultural APHIS-Animal Plant Health Inspection
Service
What are common characteristics of most invasive species?
Rapidly reproduction Not many (if any) limiting factors Outcompete native species for resources No “natural” predators in new environment.
Snakehead Fish Read the following article and answer the
questions about the snakehead fish. Please do this on your own. You have about 10 minutes.
Northern Snakehead Distribution
Video of Snakehead Fish Sightings in US since 1997 by USGS Video of Snakehead v. Large Mouth
Bass