HOME >> BIOLOGY >> NEWS
Tent caterpillars and their parasites

A French version of this press release is available by clicking here.

Edmonton (March 12) - Sustainable Forest Management Network Principal Investigator, Dr. Jens Roland has discovered a correlation between forest tent caterpillar infestations and the amount of forest left standing after an area has been harvested. Says Roland, "In larger forest stands, the mortality factors which cause collapse of the tent caterpillars infestation (parasites and disease) are more effective than they are in small stands." Dr. Roland's work suggests that a forest tent caterpillar outbreak and the rate of collapse is a critical indicator of the overall health of Canada's aspen boreal forest, and provides various new options for forest managers who would like to minimize the effects of forest tent caterpillar outbreaks.

The impact of forest tent caterpillars should not be underestimated. For comparison purposes, at the peak of a caterpillar outbreak, the biomass of caterpillars per km2 would be equivalent to 657 caribou per km2. Similarly, the biomass of the tiny parasitic flies that attack and feed on these caterpillars would be equivalent to 82 wolves in the same one km2 area.

Given the immense scale of the predator-prey battle going in our backyards, parks, and forests, it is not surprising that the forest tent caterpillar is the principal defoliating insect of trembling aspen in the boreal forest across the country. "During a major outbreak," says Roland, "forest tent caterpillars can completely defoliate an aspen forest; virtually stop their growth - reducing growth increment by as much as four cubic metres of wood per hectare each year. "While we can't stop a tent caterpillar infestation," said Roland, "we don't want to do anything to prolong it either, such as rendering its natural enemies ineffective through effects of altered forest structure." If the number of y
'"/>

Contact: Marvin Abugov
mabugov@ualberta.ca
780-492-2492
Networks of Centres of Excellence Canada
12-Mar-2002


Page: 1 2

Related biology news :

1. Phased-out Bt corn variety dramatically cut growth rate of black swallowtail caterpillars
2. Microbes eat their way to better concrete
3. Plumbing trees plumbing reveals their engineering skill
4. Muscling their way into the food chain: Zebra mussels alter fish populations in the Hudson River
5. An exotic grass kills trees by hijacking their water
6. Sleepless over Seattle: Migrating songbirds forgo sleep but keep their wits
7. Bacteria spill their guts to aid researchers in quest for new antibiotics
8. New York City study shows newborns more susceptible to pollution than their mothers
9. AAAS 2004 salary survey: Despite long hours and low pay, life scientists love their work
10. Corals can reestablish symbiosis with algae from their environments after bleaching
11. Birds use herbs to protect their nests

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Tent caterpillars and their parasites

(Date:7/27/2014)... vitro study has revealed that nicotine and cotinine, a ... by a certain carcinogen in smoke. , The carcinogen ... tobacco leaves and ultimately ends up in the tobacco ... and liver, where it is activated by a variety ... mice has revealed that nicotine can partially interfere with ...
(Date:7/27/2014)... asteroid strike that wiped them out if it had ... say. , A fresh study using up-to-date fossil records ... a new narrative of the prehistoric creatures, demise, some ... the few million years before a 10km-wide asteroid struck ... This included extensive volcanic activity, changing sea levels and ...
(Date:7/27/2014)... to date, researchers from the U.K. provide national, regional, ... virus (HCV). Findings published in Hepatology, a journal of ... indicate that genotype 1 is the most prevalent worldwide, ... reside in East Asia. Genotype 3, at just over ... by genotypes 2, 4, 6, and 5. , ...
Breaking Biology News(10 mins):Nicotine found to inhibit DNA-strand break caused by a certain carcinogen in smoke 2Dinosaurs fell victim to perfect storm of events, study shows 2Hepatitis C virus genotype 1 is most prevalent worldwide 2
(Date:7/26/2014)... (PRWEB) July 26, 2014 Canada ... key market data on the Canada Endoscopy Visualization ... of US dollars, volume (in units) and average ... High-End Endoscopy Visualization Systems, Mid-Range Endoscopy Visualization Systems ... Report at http://www.marketresearchreports.biz/analysis/213254 . , The report ...
(Date:7/25/2014)... 2014 "Ischemic Stroke and Cerebral ... data on the Ischemic Stroke and Cerebral Stroke ... and data relating to the clinical trials on ... global Ischemic Stroke Research Report 2014 at: ... the trial numbers and their recruitment status as ...
(Date:7/25/2014)... , July 25, 2014 Amgen (NASDAQ: ... Directors today declared a $0.61 per share dividend for ... paid on Sept. 5, 2014, to all stockholders of ... 14, 2014.  About Amgen Amgen is ... suffering from serious illnesses by discovering, developing, manufacturing and ...
(Date:7/25/2014)... -- Trillions of bacteria live in each person,s digestive ... digest food and stave off harmful infections, but their ... To help shed light on the role of these ... professor Eric Alm recently tracked fluctuations in the bacterial ... The findings, described in the July 25 issue of ...
Breaking Biology Technology:Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 2Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 3Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 4Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 5Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 2Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 3Amgen Announces 2014 Third Quarter Dividend 2Amgen Announces 2014 Third Quarter Dividend 3Monitoring the rise and fall of the microbiome 2Monitoring the rise and fall of the microbiome 3
Cached News: