Featured Research

from universities, journals, and other organizations

New study shows effects of climate conditions on bark beetle outbreaks

Date:
November 12, 2012
Source:
USDA Forest Service - Pacific Southwest Research Station
Summary:
A recent study by a team of scientists confirms the important role climate plays on bark beetle outbreaks. Based on three decades of bark beetle outbreaks in Oregon and Washington, the researchers developed a statistical probability model to quantify the contribution of various climate conditions, such as temperature and precipitation, on outbreak levels and to estimate expected amounts of damage to lodgepole pine forests (e.g. total area with beetle outbreaks).

A recent study by a team of scientists from the U.S. Forest Service's Pacific Southwest and Pacific Northwest research stations, and the University of Idaho confirms the important role climate plays on bark beetle outbreaks. Based on three decades of bark beetle outbreaks in Oregon and Washington, the researchers developed a statistical probability model to quantify the contribution of various climate conditions, such as temperature and precipitation, on outbreak levels and to estimate expected amounts of damage to lodgepole pine forests (e.g. total area with beetle outbreaks).

Key findings, which appeared in the journal Ecology, include:

  • Warmer winter temperatures of -5 degrees Celsius and above were associated with increased probabilities of large outbreaks and higher beetle survival.
  • Optimal mean annual temperature for large outbreaks ranged from 1 to 4 degrees Celsius. Optimal temperatures are associated with synchronized emergence of beetles from parent trees leading to mass attacks of new host trees.
  • Lower cumulative precipitation in two prior years (<300mm) and higher current year precipitation (>200mm) were associated with an increased likelihood of outbreaks. The first being likely due to drought stress on trees while the second is likely because of thickness of tree phloem, and hence, quantity of beetle food resource.
  • A weather suitability index developed from the statistical model indicated a 2.5 times increase in the odds of an outbreak at locations with high suitability versus locations with low suitability.

The findings of the study contribute to the broader understanding of drivers of landscape level mountain pine beetle outbreaks in lodgepole pine forests, particularly in view of future climate change projections that could significantly alter key climate related factors.

"This study was partly motivated by the need to develop a statistical model for evaluating laboratory-derived bark beetle suitability indexes at the landscape level," says Pacific Southwest Research Station scientist Dr. Haiganoush Preisler, who co-authored the report.

To read the full report, "Climate and Weather Influences on Spatial Temporal Patterns of Mountain Pine Beetle Populations in Washington and Oregon," go to: http://treesearch.fs.fed.us/pubs/42241.


Story Source:

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


Cite This Page:

USDA Forest Service - Pacific Southwest Research Station. "New study shows effects of climate conditions on bark beetle outbreaks." ScienceDaily. ScienceDaily, 12 November 2012. <www.sciencedaily.com/releases/2012/11/121112101052.htm>.
USDA Forest Service - Pacific Southwest Research Station. (2012, November 12). New study shows effects of climate conditions on bark beetle outbreaks. ScienceDaily. Retrieved September 23, 2014 from www.sciencedaily.com/releases/2012/11/121112101052.htm
USDA Forest Service - Pacific Southwest Research Station. "New study shows effects of climate conditions on bark beetle outbreaks." ScienceDaily. www.sciencedaily.com/releases/2012/11/121112101052.htm (accessed September 23, 2014).

Share This



More Earth & Climate News

Tuesday, September 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Hundreds of Thousands Hit NYC Streets to Protest Climate Change

Hundreds of Thousands Hit NYC Streets to Protest Climate Change

AFP (Sep. 22, 2014) Celebrities, political leaders and the masses rallied in New York and across the globe demanding urgent action on climate change, with organizers saying 600,000 people hit the streets. Duration: 01:19 Video provided by AFP
Powered by NewsLook.com
Raw: Protesters Stage Wall Street Climate Sit-in

Raw: Protesters Stage Wall Street Climate Sit-in

AP (Sep. 22, 2014) A day after over 100,000 people marched against climate change, more than 1,000 activists blocked parts of Manhattan's financial district. Over 100 people, including a person wearing a white polar bear suit, were arrested Monday night. (Sept. 22) Video provided by AP
Powered by NewsLook.com
French FM Urges 'powerful' Response to Global Warming

French FM Urges 'powerful' Response to Global Warming

AFP (Sep. 22, 2014) French Foreign Minister Laurent Fabius on Monday warned about the potential "catastrophe" if global warming was not dealt with in a "powerful" way. Duration: 01:08 Video provided by AFP
Powered by NewsLook.com
Ongoing Drought, Fighting Put Somalia at Risk of Famine

Ongoing Drought, Fighting Put Somalia at Risk of Famine

AFP (Sep. 22, 2014) After a year of poor rains and heavy fighting Somalia is again at risk of famine, just three years after food shortages killed 260,000 people. Duration: 01:10 Video provided by AFP
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:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

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