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:8/27/2014)... mastodons, short-faced bears, giant ground sloths, saber-toothed cats ... 13,000 years ago at the end of the Pleistocene ... been debated by scientists who, until recently, could only ... including UC Santa Barbara,s James Kennett, professor emeritus in ... collision with Earth played a major role in the ...
(Date:8/27/2014)... began exploring land and evolved into tetrapods today,s amphibians, ... used their fishy bodies and fins in a terrestrial environment ... , Researchers at McGill University published in the journal ... Polypterus , to help show what might have happened when ... Polypterus is an African fish that can breathe air, ...
(Date:8/27/2014)... An invasive grass species frequently found in forests ... then feed on American toads, a new University of ... accidentally introduced to the U.S. in the early 1900s, ... has spread to more than a dozen states in ... along roads and in forests, it can survive in ...
Breaking Biology News(10 mins):Nanodiamonds are forever 2Nanodiamonds are forever 3Walking fish reveal how our ancestors evolved onto land 2More wolf spiders feasting on American toads due to invasive grass, UGA study shows 2More wolf spiders feasting on American toads due to invasive grass, UGA study shows 3
(Date:8/27/2014)... , Aug. 27, 2014   MSC , ... patient safety, today announced the appointment of Mary ... With 28 years of experience preparing companies for ... 2013 as Executive Vice President of Corporate Development and ... performance improvement business , as well as corporate strategy ...
(Date:8/27/2014)... DUBLIN , Aug. 27, 2014 ... of the "Global Lactic Acid  (Biodegradable Polymer, ... - Trends & Forecasts to 2019" report ... the simplest hydroxyl-carboxylic acid with an asymmetrical carbon ... in the biodegradable polymer, food and beverage, personal ...
(Date:8/27/2014)... -- Guggenheim Securities, the investment banking and capital markets ... veteran equity analyst Charles "Tony" Butler as a managing ... on the biotech/biopharma sector. " Tony Butler ... a broad network of relationships in his industry," said ... of Equities at Guggenheim Securities. "His insights will further ...
(Date:8/27/2014)... , Aug. 27, 2014 Research ... "Global Stable Isotope Ratio Mass Spectrometer Industry Report 2014" ... Global Stable Isotope Ratio Mass Spectrometer Industry Report 2014 ... state of the global isotope ratio mass spectrometer industry. ... the industry including definitions, classifications, applications and industry chain ...
Breaking Biology Technology:MSC names Mary Beth Loesch President and CEO 2Global Lactic Acid (Biodegradable Polymer, Food & Beverage, Personal Care & Pharmaceutical) Market - Trends & Forecasts to 2019 2Guggenheim Securities Hires Analyst Charles "Tony" Butler to Expand Healthcare Coverage 2Global Stable Isotope Ratio Mass Spectrometer Industry Report 2014 2
Cached News: