Featured Research

from universities, journals, and other organizations

Risk of beetle outbreaks rise, along with temperature, in the warming West

Date:
September 21, 2010
Source:
USDA Forest Service, Pacific Northwest Research Station
Summary:
The potential for outbreaks of spruce and mountain pine beetles in western North America's forests is likely to increase significantly in the coming decades, according to a study conducted by USDA Forest Service researchers and their colleagues. Their findings represent the first comprehensive synthesis of the effects of climate change on bark beetles.

The potential for outbreaks of spruce and mountain pine beetles in western North America's forests is likely to increase significantly in the coming decades, according to a study conducted by USDA Forest Service researchers and their colleagues. Their findings, published in the September issue of the journal BioScience, represent the first comprehensive synthesis of the effects of climate change on bark beetles.

"Native bark beetles are responsible for the death of billions of coniferous trees across millions of acres of forests ranging from Mexico to Alaska," said Barbara Bentz, research entomologist with the Forest Service's Rocky Mountain Research Station and lead author of the study. "Our study begins to explain how their populations respond to the climatic changes being projected by the Intergovernmental Panel on Climate Change."

In the study, Bentz and her colleagues synthesized what is currently known about the effects of climate change on several species of bark beetles that cause extensive, landscape-scale tree mortality in North America. They then used a combination of models to analyze the likely response of and generate case studies for two specific species -- the spruce beetle and mountain pine beetle.

"Our models suggest that climatic changes on the order of what is expected would increase the population success of both spruce beetle and mountain pine beetle throughout much of their range, although there is considerable variability," said Chris Fettig, a research entomologist with the Pacific Southwest Research Station and a coauthor of the study. "Bark beetles are influenced directly by shifts in temperature, which affect developmental timing and temperature-induced mortality, and indirectly, through climatic effects on the species associated with beetles and their host trees."

One effect the study detected is the likelihood, in a warming climate, of a substantial increase in areas of spruce forest dominated by spruce beetles that reproduce annually rather than every two years, as is common today. Annual reproduction of the beetle can contribute significantly to population growth and the occurrence of outbreaks.

In addition, the study's models also helped to address concerns about the potential for mountain pine beetles to expand their range across forests of central Canada into the central and Eastern United States. The researchers found that, without adaptation to warming temperatures, the likelihood of this occurring is low to moderate throughout this century.

"Understanding how bark beetle populations will be affected under different climate scenarios in different regions is key to developing appropriate management strategies in North American forests," Bentz said.

The study was a partnership among the Forest Service's three western research stations; the Western Wildland Environmental Threat Assessment Center; the Canadian Forest Service; and the University of Idaho, Moscow.


Story Source:

The above story is based on materials provided by USDA Forest Service, Pacific Northwest Research Station. Note: Materials may be edited for content and length.


Journal Reference:

  1. Barbara J. Bentz, Jacques Rιgniθre, Christopher J Fettig, E. Matthew Hansen, Jane L. Hayes, Jeffrey A. Hicke, Rick G. Kelsey, Jose F. Negrσn, Steven J. Seybold. Climate Change and Bark Beetles of the Western United States and Canada: Direct and Indirect Effects. BioScience, 2010; 60 (8): 602 DOI: 10.1525/bio.2010.60.8.6

Cite This Page:

USDA Forest Service, Pacific Northwest Research Station. "Risk of beetle outbreaks rise, along with temperature, in the warming West." ScienceDaily. ScienceDaily, 21 September 2010. <www.sciencedaily.com/releases/2010/09/100908171158.htm>.
USDA Forest Service, Pacific Northwest Research Station. (2010, September 21). Risk of beetle outbreaks rise, along with temperature, in the warming West. ScienceDaily. Retrieved August 21, 2014 from www.sciencedaily.com/releases/2010/09/100908171158.htm
USDA Forest Service, Pacific Northwest Research Station. "Risk of beetle outbreaks rise, along with temperature, in the warming West." ScienceDaily. www.sciencedaily.com/releases/2010/09/100908171158.htm (accessed August 21, 2014).

Share This




More Plants & Animals News

Thursday, August 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Newsy (Aug. 21, 2014) — An experimental drug used to treat Marburg virus in rhesus monkeys could give new insight into a similar treatment for Ebola. Video provided by Newsy
Powered by NewsLook.com
Terrifying City-Dwelling Spiders Are Bigger And More Fertile

Terrifying City-Dwelling Spiders Are Bigger And More Fertile

Newsy (Aug. 21, 2014) — According to a new study, spiders that live in cities are bigger, fatter and multiply faster. Video provided by Newsy
Powered by NewsLook.com
Lost Brain Cells To Blame For Sleep Problems Among Seniors

Lost Brain Cells To Blame For Sleep Problems Among Seniors

Newsy (Aug. 21, 2014) — According to a new study, elderly people might have trouble sleeping because of the loss of a certain group of neurons in the brain. Video provided by Newsy
Powered by NewsLook.com
Ramen Health Risks: The Dark Side of the Noodle

Ramen Health Risks: The Dark Side of the Noodle

AP (Aug. 21, 2014) — South Koreans eat more instant ramen noodles per capita than anywhere else in the world. But American researchers say eating too much may increase the risk of diabetes, heart disease and stroke. (Aug. 21) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins