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:4/17/2014)... available in German . ... protection money demanded of him, he can expect his premises ... as fear of the consequences is enough to make restaurant ... birds, which lay their eggs in other birds, nests. If ... parasites take their revenge by destroying the entire nest. Consequently, ...
(Date:4/17/2014)... fragmentation of forests in the Amazon help create ... to rapid and widespread forest loss during drought ... findings show that forests in the Amazon could ... with forest fires lead to large-scale loss of ... assistant professor of geography, Penn State. , "We ...
(Date:4/17/2014)... in many serious conditions such as heart disease, epilepsy ... drug therapies. Unfortunately, there is still much scientists do ... fresh and unexpected insight into the structure of sodium ... molecules - which are responsible for ,fine-tuning, the activity ... most recent edition of the Journal of Biological ...
Breaking Biology News(10 mins):Fear of the cuckoo mafia 2Fear of the cuckoo mafia 3Drought and fire in the Amazon lead to sharp increases in forest tree mortality 2Drought and fire in the Amazon lead to sharp increases in forest tree mortality 3Structure of sodium channels different than previously believed 2
(Date:1/15/2014)... 15, 2014 Cynvenio, a cancer diagnostics ... the genomic analysis of tumor cells in the bloodstream, ... web-based cancer decision support application powered by CollabRx, Inc. ... ClearID™ genomic test, Therapy Finder will provide breast cancer ...
(Date:1/15/2014)... 2014 ­ RedBrick Health , a fast-growing leader ... announces that EmblemHealth , the New ... now providing the RedBrick Compass health assessment, combined with ... of its members. EmblemHealth is among the first health ...
(Date:1/15/2014)... A study has been launched to test whether ... could help to tackle the problem of obesity.  This unique ... surgery based in Stowmarket) and academics at University Campus Suffolk ... technology, which is inspired by equipment used to collect data ...
(Date:1/15/2014)... Two champions of science, technology, engineering, ... an annual competition for middle and high school students ... STEM study. The competition presents students with real-world problems ... Aptitude, Mathematics, and Sciences is a program administered ...
Breaking Biology Technology:Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5
Cached News: