Featured Research

from universities, journals, and other organizations

Winter Biological Processes May Help Spread Shrubs In The Arctic

Date:
January 16, 2005
Source:
American Institute Of Biological Sciences
Summary:
Shrubs have become more abundant in the Arctic over the past 30 years as air temperatures have increased, a change that is likely to affect the grazing of caribou and the communities that rely on them for food. According to an article in the January 2005 issue of BioScience, a variety of evidence now suggests that winter biological processes form a positive feedback mechanism that is contributing to the expansion of shrubs in the Arctic.

Shrubs have become more abundant in the Arctic over the past 30 years as air temperatures have increased, a change that is likely to affect the grazing of caribou and the communities that rely on them for food. According to an article in the January 2005 issue of BioScience, a variety of evidence now suggests that winter biological processes form a positive feedback mechanism that is contributing to the expansion of shrubs in the Arctic. The effect could have important implications for the global carbon budget, as the mechanism may liberate large stores of carbon that are currently frozen and not participating in the carbon cycle.

Related Articles


The article, by Matthew Sturm of the U.S. Army Cold Regions Research and Engineering Laboratory-Alaska and seven coauthors, notes that the evidence for increasing shrub abundance--including historical photographs-- is most comprehensive in northern Alaska. Information from other arctic regions supports the idea, however. Sturm's group argues that observations indicate that shrubs encourage deeper snowdrifts, which warm the soil below, preventing some subsurface water from freezing even during winter. This effect alters and boosts the winter activity of subsurface soil bacteria and fungi that provide accessible nutrients for shrubs, notably nitrogen. As a result, shrubs grow more rapidly, and so the spread continues.

###

BioScience publishes commentary and peer-reviewed articles covering a wide range of biological fields. The journal has been published since 1964. AIBS is an umbrella organization for professional scientific societies and organizations that are involved with biology. It represents 89 member societies and organizations with a combined membership of about 240,000.


Story Source:

The above story is based on materials provided by American Institute Of Biological Sciences. Note: Materials may be edited for content and length.


Cite This Page:

American Institute Of Biological Sciences. "Winter Biological Processes May Help Spread Shrubs In The Arctic." ScienceDaily. ScienceDaily, 16 January 2005. <www.sciencedaily.com/releases/2005/01/050111123859.htm>.
American Institute Of Biological Sciences. (2005, January 16). Winter Biological Processes May Help Spread Shrubs In The Arctic. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2005/01/050111123859.htm
American Institute Of Biological Sciences. "Winter Biological Processes May Help Spread Shrubs In The Arctic." ScienceDaily. www.sciencedaily.com/releases/2005/01/050111123859.htm (accessed October 23, 2014).

Share This



More Plants & Animals News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Black Bear Cub Goes Sunday Shopping

Black Bear Cub Goes Sunday Shopping

Reuters - Light News Video Online (Oct. 23, 2014) Price check on honey? Bear cub startles Oregon drugstore shoppers. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Working Mother DIY: Pumpkin Pom-Pom

Working Mother DIY: Pumpkin Pom-Pom

Working Mother (Oct. 22, 2014) How to make a pumpkin pom-pom. Video provided by Working Mother
Powered by NewsLook.com
Goofy Dinosaur Blends Barney and Jar Jar Binks

Goofy Dinosaur Blends Barney and Jar Jar Binks

AP (Oct. 22, 2014) A collection of dinosaur bones reveal a creature that is far more weird and goofy-looking than scientists originally thought when they found just the arm bones nearly 50 years ago, according to a new report in the journal Nature. (Oct. 22) 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:

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