Navigation Links
Invasive insects cause staggering impact on native tree
Date:8/3/2012

The beautiful, endemic and endangered cycad, Cycas micronesica was once a dominant forest tree on the island of Guam, but recent plant mortality predicts extirpation from Guam habitats by 2019. This dire prediction by scientists at the Western Pacific Tropical Research Center (WPTRC), University of Guam is validated by the research of Thomas E. Marler and John H. Lawrence, which has concluded that Cycas micronesica is the only native host for the invasive scale insect Aulacaspis yasumatsui. "The potential cascading ecosystem responses are yet to be completely understood," says WPTRC research scientist Marler.

The armored scale insect A. yasumatsui attacks several cycad genera, but only members of the Cycas genus are killed by the pest. Around twenty years ago the insect was unintentionally introduced to an area in southern Florida known for the production and exportation of Cycas revoluta. The scale was documented in Hawaii in 1998 and in Guam in 2003, and by 2005 it was found in native limestone forest habitat close to the initial outbreak site.

"We looked for native habitats that would be representative of the general cycad populations where we could study population-level response to the devastating scale pest. Our data showed the number of months for juvenile plants to reach 100% mortality was dependent on size and other demographic features," says Marler.

Just like the human body, plants exposed to constant stresses eventually become weakened and unable to withstand additional stresses that by themselves would not be fatal. After the scale invasion, mature C. micronesica trees began to succumb to other pressures. These other factors contributing to the plant mortality include two other invasive insects that enjoy eating cycad salads for dinner: the cycad blue butterfly (Chilades pandava) and a tiny moth (Erechthias sp.).

"During the time frame of our study, cycad scale has been found in Rota in 2007 and in Palau in 2008," says Marler. "The spread of A. yasumatsui in the region underscores the importance of empirical studies to inform conservation efforts on Guam and the rest of Micronesia."


'/>"/>
Contact: Olympia Terral
olympia.uog@gmail.com
University of Guam
Source:Eurekalert

Related medicine news :

1. Routine mammograms may result in significant overdiagnosis of invasive breast cancer
2. Invasive heart test being dramatically overused, Stanford study shows
3. Lower Risk for Bowel Obstruction With Less Invasive Surgery: Study
4. Less-Invasive Surgery for Esophageal Cancer Might Be Safer
5. Less Invasive Heart Valve Replacement Works for Elderly: Study
6. Accelerated chemotherapy given before surgery benefits patients with muscle-invasive bladder cancer
7. Patients Prefer More Invasive Form of Colon Scan: Study
8. EVINCI results could lead to 75 percent reduction of invasive procedures for patients with suspected CAD
9. Obese appendectomy patients have fewer complications with minimally invasive operations
10. Accelerated radiation treatment effective for noninvasive breast cancer
11. Noninvasive imaging technique may help kids with heart transplants
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2016)... Mateo, CA (PRWEB) , ... May 24, 2016 ... ... dedicated to advancing the science and clinical practice of radiosurgery, is recognizing five ... of stereotactic radiosurgery (SRS) and stereotactic body radiotherapy (SBRT). The awards will be ...
(Date:5/24/2016)... (PRWEB) , ... May 24, 2016 , ... ... for 2016 increased by 9.3 million people, or 10% over last year, according ... of people covered under group policies was comparatively stable, with a slight decrease ...
(Date:5/24/2016)... OR (PRWEB) , ... May 24, 2016 , ... ... welcomed Peggy Kinst, a wellness specialist for forty years and a trainer for ... the Sharon Kleyne Hour Radio Talk Show on May 16, 2016. , Formerly ...
(Date:5/24/2016)... ... ... WaterAid launched the #perioddrama campaign to mark Menstrual Hygiene Day on May 28 ... world who do not have access to a toilet, even when they’re on their periods. ... #perioddrama. The (sometimes hilarious) results help shine a light on the awkwardness that women face ...
(Date:5/24/2016)... (PRWEB) , ... May 24, 2016 , ... In light ... residents aware of the potential of contaminated well water throughout the Houston area. , ... supplied with well water that’s exposed to contaminants. Residents may not even be aware ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... 24, 2016 ARANZ Medical  Ltd ... healthcare sector, has been named the Coretex Hi-Tech Emerging Company ... Dr Bruce Davey , CEO of ARANZ ...  It,s really good to be recognised for the work we ... are used in 35 countries around the world from Sub-Saharan ...
(Date:5/24/2016)... , May 24, 2016 ... doble terapia del mundo, introduce catéteres para la ... OrbusNeich, una compañía global especializada en el ... ha expandido su cartera incluyendo productos para tratar ... y Scoreflex™ PTA son los dispositivos de primera ...
(Date:5/23/2016)... According to a new ... Product (Wheelchair, Scooters, Medical Beds, Bathroom Safety, Mechanical, ... Wound), Accessories (Lifting, Transfer) & by End User ... MarketsandMarkets, the patient handling equipment market is expected ... a CAGR of 10.5% during the forecast period ...
Breaking Medicine Technology: