Invasion of the cane toads

Why do some invasive species expand rapidly in a new environment while others do not” Scientists from the United States and Australia are beginning to make headway on this question after analyzing how fast cane toads invaded different regions of Australia.

Using over 70 years of data on toad presences collected since their introduction, researchers discovered that cane toads invaded different regions of Australia at dramatically divergent rates. These variable invasion rates appear to be e explained not only by environmental features that facilitate toad movement, but also by the evolution of higher movement rates. Natural selection might cause the evolution of increased movement rates in individuals at the edge of a species' range because the first individuals to arrive can monopolize the best habitats and exclude later arrivals and thus gain an advantage.

“The worrying message from this research is that if control efforts fail and an invasive species spreads across a sufficiently large area,” says Mark Urban, “then it may be able to invade a broader region than expected because it has adapted to move across greater distances at the edge of its range.”

He adds, “Understanding how environmental and genetic variation affects the movement rates of invading populations will generate better predictions about when an introduced species will arrive in a sensitive ecosystem. Our hope is that this information will help control the expansion of introduced species more effectively in the future.”

This research has important implications for the global conservation of endangered species, many of which are threatened by the expanding ranges of introduced plants and animals.

Media Contact

Patricia Morse EurekAlert!

Further information:

http://www.uchicago.edu

All news from this category: Ecology, The Environment and Conservation

This complex theme deals primarily with interactions between organisms and the environmental factors that impact them, but to a greater extent between individual inanimate environmental factors.

innovations-report offers informative reports and articles on topics such as climate protection, landscape conservation, ecological systems, wildlife and nature parks and ecosystem efficiency and balance.

Back to the Homepage

Comments (0)

Write comment

Latest posts

Bringing atoms to a standstill: NIST miniaturizes laser cooling

It’s cool to be small. Scientists at the National Institute of Standards and Technology (NIST) have miniaturized the optical components required to cool atoms down to a few thousandths of…

Record-breaking laser link could help us test whether Einstein was right

Scientists from the International Centre for Radio Astronomy Research (ICRAR) and The University of Western Australia (UWA) have set a world record for the most stable transmission of a laser signal through…

Adaptive optics with cascading corrective elements

A cascaded dual deformable phase plate wavefront modulator enables direct AO integration with existing microscopes–doubling the aberration correction range and greatly improving image quality. Microscopy is the workhorse of contemporary…

Partners & Sponsors

By continuing to use the site, you agree to the use of cookies. more information

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.

Close