Featured Research

from universities, journals, and other organizations

Attack Of The Crazy Ants - Invasional 'Meltdown' On An Oceanic Island

Date:
October 14, 2003
Source:
Blackwell Publishing Ltd.
Summary:
Biological invasions have well-known direct effects on native ecosystems but may also unleash forces with complex, unexpected consequences. These ecological surprises may be especially common in simple systems, like islands, following introduction of 'megainvaders,' like tramp ants.

Biological invasions have well-known direct effects on native ecosystems but may also unleash forces with complex, unexpected consequences. These ecological surprises may be especially common in simple systems, like islands, following introduction of 'megainvaders,' like tramp ants.

Related Articles


In the September issue of Ecology Letters, O'Dowd, Green, and Lake show that impacts of invasion by the crazy ant Anoplolepis gracilipes ramify through the food web in rainforest on Christmas Island, totally reconfiguring this ecosystem in just 1-2 years.

On the forest floor, crazy ant supercolonies extirpate the dominant native omnivore, which indirectly increases seedling recruitment but slows litter decomposition. In the forest canopy, new ant-Homoptera partnerships accelerate, exacerbate, and diversify impacts. Sustained high densities of ants are associated with outbreaks of host-generalist scale insects and honeydew-dependent sooty moulds, leading to canopy dieback and even tree deaths.

The indirect fallout from the displacement of a native keystone species by an ant invader, itself abetted by introduced mutualists, precipitates invasional 'meltdown' in this island ecosystem. Even in simple systems, unforeseen effects and novel associations following introduction of a single alien species can make forecasting of impacts an elusive goal.


Story Source:

The above story is based on materials provided by Blackwell Publishing Ltd.. Note: Materials may be edited for content and length.


Cite This Page:

Blackwell Publishing Ltd.. "Attack Of The Crazy Ants - Invasional 'Meltdown' On An Oceanic Island." ScienceDaily. ScienceDaily, 14 October 2003. <www.sciencedaily.com/releases/2003/10/031014072220.htm>.
Blackwell Publishing Ltd.. (2003, October 14). Attack Of The Crazy Ants - Invasional 'Meltdown' On An Oceanic Island. ScienceDaily. Retrieved April 21, 2015 from www.sciencedaily.com/releases/2003/10/031014072220.htm
Blackwell Publishing Ltd.. "Attack Of The Crazy Ants - Invasional 'Meltdown' On An Oceanic Island." ScienceDaily. www.sciencedaily.com/releases/2003/10/031014072220.htm (accessed April 21, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Tuesday, April 21, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Going Ape: Sierra Leone Chimpanzees Hail Ebola Retreat

Going Ape: Sierra Leone Chimpanzees Hail Ebola Retreat

AFP (Apr. 21, 2015) As money runs out at Tacugama Chimpanzee Sanctuary in Sierra Leone, around 85 chimps are facing homelessness. The centre closed when the Ebola epidemic was ravaging the country but now that closure is beginning to look permanent. Video provided by AFP
Powered by NewsLook.com
Blue Bell Recalls All Products

Blue Bell Recalls All Products

AP (Apr. 21, 2015) Blue Bell Creameries voluntary recalled for all of its products after two samples of chocolate chip cookie dough ice cream tested positive for listeria, a potentially deadly bacteria. Blue Bell&apos;s President and CEO issued a video statement. (April 21) Video provided by AP
Powered by NewsLook.com
Deepwater And Dolphins: The Oil Spill's Impact 5 Years On

Deepwater And Dolphins: The Oil Spill's Impact 5 Years On

Newsy (Apr. 20, 2015) Five years on, the possible environmental impact of the Deepwater Horizon spill includes a sustained die-off of bottlenose dolphins, among others. Video provided by Newsy
Powered by NewsLook.com
Five Years Later, the BP Oil Spill Is Still Taking Its Toll

Five Years Later, the BP Oil Spill Is Still Taking Its Toll

AFP (Apr. 20, 2015) On April 20, 2010, an explosion and fire on the Deepwater Horizon rig in the Gulf of Mexico started the biggest oil spill in US history. BP recently reported the Gulf is recovering well, but scientists paint a different picture. Duration: 02:36 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins