HOME >> BIOLOGY >> NEWS
Attack of the crazy ants - invasional 'meltdown' on an oceanic island

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.

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.


'"/>

Contact: Kate Stinchcombe
kate.stinchcombe@oxon.blackwellpublishing.com
Blackwell Publishing Ltd.
10-Oct-2003


Page: 1

Related biology news :

1. Shark Attack News & Science Briefing
2. UCSF Scientists Report On A Transcription Factor That Could Stimulate Heart Cells To Repair Damage Caused By Heart Attacks Or Birth Defects
3. Sandia Decontamination Foam May Be Tomorrows Best First Response In A Chem-Bio Attack
4. Exercising Just Three Days May Provide Heart Attack Protection
5. Cardiac Clinical Trial Studies Use of Antibiotic In Preventing Heart Attack
6. Fish Are Better Than Some Drug Treatments For Heart Attack Victims
7. Blood Levels Of C-Reactive Protein May Predict Heart Attack And Stroke Risk In Women As Well As Men
8. Newly Identified Molecular Mechanism Could Lead To New Approaches For Preventing Heart Attack, Stroke
9. Security Code Helps Immune Cells Attack Foe And Spare Self
10. Tiny Molecular Channels Key To Protecting Heart During Attack
11. Vitamin C May Reduce Angina, Heart Attack Risks

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/21/2020)... (PRWEB) , ... August 18, 2020 , ... ... to cell therapy, today announced that the U.S. Food and Drug Administration (FDA) ... Sentien’s lead asset, SBI-101, for the treatment of severe COVID-19. Approval of this ...
(Date:8/21/2020)... ... , ... The 19th Annual Bio-IT World Conference & ... and IT leaders goes VIRTUAL and announces its updated event features and full ... the leadership role of keeping our life science community connected by bringing you ...
(Date:8/12/2020)... ... August 11, 2020 , ... Both Roche, ... have entered into license agreements with Housey Pharma’s HMI subsidiary to gain access ... J&J have annual Research and Development spending in excess of US $10 billion. ...
Breaking Biology News(10 mins):
(Date:8/7/2020)... THE WOODLANDS, Texas (PRWEB) , ... August 06, ... ... gene therapy and DNA vaccine industries, announces it has closed on the purchase ... Deison Technology Park in Conroe, TX and includes over 21 acres in the ...
(Date:8/3/2020)... Ky. (PRWEB) , ... August 03, 2020 , ... Introducing ... products for transformative growth, , Known as MediVet Biologics since ... brand. , The new Ardent Animal Health will build on its base ...
(Date:7/31/2020)... ... 29, 2020 , ... G-CON Manufacturing, the leader in off-site ... FOR LIFE.” The adoption of this taglines comes at a time of tremendous ... to provide patients with urgently needed vaccines and other lifesaving pharmaceutical treatments. G-CON’s ...
(Date:7/31/2020)... ... July 29, 2020 , ... Anomet Products has introduced new ... for use with CRM, neurostimulation, vascular, and related devices. , Anomet Medical ... requirements, performance, and cost criteria; especially where solid wire is limited. Typical configurations ...
Breaking Biology Technology:
Cached News: