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:4/29/2016)... San Rafael, CA (PRWEB) , ... April 29, 2016 , ... ... a week long softball camp from July 24th – 27th for girls aged 10-18. ... The camp is held at the beautiful Clark V. Whited Complex, one of the ...
(Date:4/29/2016)... ... April 29, 2016 , ... HEALTHCAREfirst , ... coding services, and Deyta Analytics, recently announced the recipients of the fourth annual ... quality as measured from the caregiver’s point of view. The official list of ...
(Date:4/29/2016)... ... April 29, 2016 , ... Intellitec Solutions will ... 16th to 18th at the Broward County Convention Center. The event is a ... on best practices in public facility management. Intellitec Solutions will highlight their customized ...
(Date:4/29/2016)... ... April 29, 2016 , ... Yisrayl Hawkins, Pastor and ... highlighting inconsistencies of adding BC and AD, saying it is time to set the ... After Christ. Yisrayl says this simply cannot possibly be true and offers explanation. , ...
(Date:4/29/2016)... ... April 29, 2016 , ... ... announced that their founders, Dr. Gemmi and Dr. Middleberg, were asked by ... around the nation. During the seminar, titled “Advancing the Biomechanics of Invisalign ...
Breaking Medicine News(10 mins):
(Date:4/27/2016)... 2016 Global  urinalysis market ... by 2022, according to a new report by ... http://photos.prnewswire.com/prnh/20150105/723757 ) , Automation ... and accuracy delivered by the new generation urinalysis ... urinalysis instruments and consumables. For instance, the automatic ...
(Date:4/26/2016)... Diplomat Pharmacy, Inc. (NYSE: DPLO) is pleased ... Pharm D., to Vice President of Education and Quality. ... will continue to lead and oversee Diplomat University, an ... and training to Diplomat employees and external professionals on ... also houses the quality assurance department, which focuses on ...
(Date:4/26/2016)... -- Research and Markets has announced the ... report to their offering.      (Logo: ... market is projected to grow at a CAGR of ... is a technique that involves measurement and analysis of ... changes in biochemical pathways. The aim of performing these ...
Breaking Medicine Technology: