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:8/14/2018)... ... August 13, 2018 , ... Castle Dental® has partnered ... office on South Lamar Blvd. to provide free dental services for underinsured, low-income ... include x-rays and exams, fillings , extractions , cleanings ...
(Date:8/9/2018)... ... August 08, 2018 , ... ... and marketing companies, who helps physicians bring the latest regenerative therapies and treatment ... and Saturday, October 5-6, 2018 in White Plains, NY. , The ...
(Date:8/7/2018)... (PRWEB) , ... August 06, 2018 , ... ... in front of The NCERC at Southern Illinois University Edwardsville’s University Park. SIUE ... also grain sorghum and sweet sorghum. These three feedstocks represent conventional biofuels production, ...
Breaking Biology News(10 mins):
(Date:8/1/2018)... , ... August 01, 2018 ... ... today announces research results on the significant impact of a proprietary biofield ... , The preclinical research assessed biomarkers for systemic and organ-specific inflammation, ...
(Date:7/31/2018)... (PRWEB) , ... July 31, 2018 , ... ... 2 additional CE/IVD marked molecular quality controls to its expanding CE/IVD product inventory. ... controls to our expanding CE/IVD QC offerings. ZeptoMetrix remains entirely committed to fully ...
(Date:7/27/2018)... ... July 27, 2018 , ... ... Advocacy Group (BRAG®) and representatives of the Biotechnology Innovation Organization (BIO) met ... recently-issued white paper, “Proposal for a Toxic Substances Control Act (TSCA) Inventory ...
(Date:7/25/2018)... ... July 25, 2018 , ... Eileen Meagher, an evidence-based ... biofield energy treated nutraceutical to improve skin health parameters including anti-wrinkling, skin hydration, ... and reported the following results:,     More than 500% increase ...
Breaking Biology Technology:
Cached News: