Zebra Mussel Species Introduction Introduced species are species that have become able to survive and reproduce outside the habitat where they evolved or spread naturally United States Environmental Protection Agency ID: 806066
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Slide1
Introduction and Extinction of Species in an Eco System
Zebra Mussel
Slide2Species Introduction
“Introduced species are species that have become able to survive and reproduce outside the habitat where they evolved or spread
naturally.”
-
United States Environmental Protection Agency
Example of an ecosystem
Slide3Introduced Species
Species can be classified in two classes 1)Invasive 2)Non-invasive
Both types of introduced species
are
brought to a new environment by human activity, either accidentally
or deliberately.
Example of an invasive species
:Zebra Mussels
Slide4Simpsons did it
https://www.youtube.com/watch?v=3f5viRoaZNw
https://
www.youtube.com/watch?v=mpzj1IvEhTA
Slide5Definition of Non-Invasive Species
A non-invasive
species is an organism that is not native to the ecosystem, but doesn't have any negative effects on the ecosystem.
Examples include peaches and tomatoes.
Slide6Definition of Invasive Species
An invasive species is an organism that is not native to the ecosystem, and has negative effects on the ecosystem.Examples include the zebra mussel which originated in Russia, and are now found in rivers worldwide, and cause damage by clogging pipes and contaminating the water.
A colony of Zebra mussels that are attached to a larger mussel
Slide7What do invasive species do, anyway, and why do they pose such a threat
Invasive species cause harm to wildlife that is foreign to it. These species are new which causes them to be more aggressive. The new species may not have any predators, and their numbers will spread rapidly and uncontrollably, along with taking over an area. Native wildlife wont be able to protect it’s self against the new invasive species
Slide8New Zealand
Slide9Invasive species videos!
https://www.youtube.com/watch?v=k3N5t70aJ2Ahttps://
www.youtube.com/watch?v=oYcl0xxU5_s
http://www.jfindlay.ca/?
go=flowplayer&resid=977
Slide10Extinction Definition
The death of a species. It is considered to be the death of the last member of the species.The two types of extinction are:
Global
Extinction
Local Extinction
Slide11Global Extinction
Defined as the total disappearance of a species
Examples include the Dinosaurs and the Dodo, both of which are extinct worldwide.
Dodo Bird
Extinct dinosaur
Slide12Local Extinction
Defined as the disappearance of a species in a certain ecosystem, but the species lives in a different ecosystem.
Local extinction can be fixed by replacing the missing organisms with the same species from other locations.
An example of local extinction is that saltwater crocodiles used to live in Vietnam, but are now extinct in that specific location.
Salt water crocodile
Slide13Effects
of the Extinction of a Species
If a species is eliminated, it
can
cause many problems with the other trophic levels.
For example, the species that it
feeds on
can
become overpopulated and begin to die out, affecting the next trophic level, and so on.
This is called the cascade effect.
Slide14Slide15Practice
Slide16Questions
1) What is the definition of extinction?
Slide17The death of a species
Slide18What are the two types of Extinction
Slide19Global and local extinction
Slide20What are two examples of global extinction
Slide21Dinosaur and Dodo Birds
Slide22What is an example of local extinction
Slide23Salt water crocodiles
Slide24What are the two types of introduced species
Slide25Invasive and non-
invasive species