Invading crabs could threaten life in the Antarctic

Invading crabs could threaten life in the Antarctic
The brachyuran crab Halicarcinus planatus from the Beagle Channel, south of Tierra del Fuego, is shown. This adult female has recently moulted. Oocytes and other internal structures are visible through the carapace, which is 15 mm wide. Inset shows a preserved, adult-sized female of the same species discovered at Deception Island, Antarctica in 2010. That crab's carapace is 12 mm wide, and its fifth-left walking leg (pereiopod) separated after it was collected. Images taken by S.T. Credit: S.T.

Life on the Antarctic sea floor is under threat from crabs that could invade the area thanks to favorable conditions as a result of global warming, researchers warn.

In a Journal of Biogeography editorial, experts say invasive species degrade marine ecosystems by preying on or outcompeting local species. Early signs of are already apparent.

"Biological invasion is a major worry in the Arctic," said lead author Dr. Richard Aronson, "but we should be just as concerned about the Antarctic." Assessing the extent of the problem requires long-term monitoring programs.


Explore further

Global warming affects Artic and Antarctic regions differently

More information: Aronson, R. B., Frederich, M., Price, R., Thatje, S. (2014), Prospects for the return of shell-crushing crabs to Antarctica. Journal of Biogeography. DOI: 10.1111/jbi.12414
Journal information: Journal of Biogeography

Provided by Wiley
Citation: Invading crabs could threaten life in the Antarctic (2014, October 6) retrieved 21 July 2019 from https://phys.org/news/2014-10-invading-crabs-threaten-life-antarctic.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
0 shares

Feedback to editors

User comments

Oct 06, 2014
That's pretty much how nature works though. As soon as something has an edge, it shows up and takes over. In fact, that's how humans work too. We don't fall far from the invasive apple tree.

Oct 06, 2014
"Invasion biology" won't become a real science until non-terrestrial organisms arrive on Earth. Until then, it is just a pseudoscience contrived to extract funding for "research" via hyperbole. Logically speaking, no organism native to Earth can invade Earth. Niches open and close, organisms migrate, adapt, or die. That's life here, until the aliens arrive.

For those who insist that invasion biology is science, you must then agree that humans are the most invasive, disruptive species on the planet. What's your plan to eradicate THAT invasion?

Oct 06, 2014
Phys.org needs to create a section called PARASITES for "research" like this, where the global warming bogey is exploited for funding.

Oct 07, 2014
Oh nose!! Antarctica got the crabs.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more