Featured Research

from universities, journals, and other organizations

Dead wood alive with management information in old-growth Iranian forest

Date:
April 14, 2014
Source:
Virginia Tech (Virginia Polytechnic Institute and State University)
Summary:
Dead wood, such as old stumps and logs, is often overlooked when examining forest’s vitality; however, new research from old-growth forests in Iran point out the importance of this often-overlooked forest feature. In a new study, researchers sought to characterize the volume of coarse and fine woody debris present in old-growth beech forests in the Caspian Hyrcanian mixed forest of northern Iran, and correlate the understory coarse woody debris volume to the overstory forest structure.

Snags are one form of dead wood researchers recorded. Iranian beech (shown here) is the same genus but a different species than American beech.
Credit: Kiomars Sefidi

Dead wood, such as old stumps and logs, is often overlooked when examining a forest's vitality; however, new research from old-growth forests in Iran point out the importance of this often-overlooked feature.

"Dead wood is great habitat for wildlife, provides a sheltered environment for young seedlings, holds soil and moisture on the site, and stores carbon," said Carolyn Copenheaver, an associate professor of forest ecology in Virginia Tech's College of Natural Resources and Environment. "So woody debris management is important for conservation, but it requires baseline measurements of relatively undisturbed mature forests, which haven't yet been done in some parts of the world, including Iran."

According to a study in the July 2013 issue of Natural Areas Journal, researchers sought to characterize the volume of coarse and fine woody debris present in old-growth beech forests in the Caspian Hyrcanian mixed forest of northern Iran; compare the number and volume of different forms of coarse woody debris such as logs, snags or stumps, and correlate the understory coarse woody debris volume to the overstory forest structure.

"These research objectives are very timely given the documented loss and degradation of Iranian Hyrcanian forests due to illegal logging, fuel wood cutting, expansion of agricultural fields, and expanding construction to support nature-based tourism," said the researchers, including Copenheaver, with Kiomars Sefidi, formerly a doctoral student in natural resources at the University of Tehran, who studied the subject at the university's Kheyrud Experimental Forest.

Sefidi's committee chair was Mohammad R. Marvie Mohadjer, a professor in silviculture and forest ecology at the University of Tehran, and his graduate committee members were Reinhard Mosandl, chair of silviculture at the Technical University of Munich.

Working in 15 plots of 2.5-acres, the researchers recorded diameter, height, and species of living trees; measured course woody debris, including snags, logs, and stumps; and noted degree of decay.

Oriental beech was the dominant species in the layer of foliage in the forest canopy known as the overstory, and made up 80 percent of course woody debris and 74 percent of fine woody debris.

"Most of the dead Oriental beech was in an advanced state of decay," the article reports.

But in terms of volume, the course woody debris in the section of the Kheyrud Experimental Forest is significantly less than in the Kheiroud Forest, also in northern Iran, which Sefidi and Marvie Mohadjer had also studied, and about half of the volume in old-growth beech forests in Turkey and Albania, which have been studied by others.

"We believe there may have been some livestock grazing that prevented tree establishment for a few years many decades ago," said Copenheaver.

Most of the coarse wood debris in the forest was in an advanced state of decay, meaning the trees, mostly now in the form of rotting logs, had been dead 12 to 59 years, although the most advanced decay erased tree rings so that age could not be determined.

"The study also yielded another important observation," said Copenheaver. "Almost 40 percent of the total volume of dead wood was fine woody debris -- a size class that has received little attention."

Fine woody debris is important to predicting fire behavior, the researchers note.

"Some old-growth characteristics may be desirable for managers to incorporate into managed stands," such as increasing coarse woody debris to levels consistent with natural stands in order to increase habitat potential and biodiversity.

However, as with the findings of lower than natural volume of course woody material at the Kheyrud Experimental Forest site, "it is important to understand all of the influences on a stand's condition before using it as a reference for restoration and conservation of forests," the researchers conclude.

The research was funded by Sefidi's graduate assistantship award from the University of Tehran. He is now a researcher with the Department of Rangeland and Watershed Management at the University of Mohaghegh Ardabili, Iran.

The research team has partnered on four manuscripts. "I have come to appreciate the Caspian forests that span the northern part of Iran and border the Caspian Sea," Copenheaver said.


Story Source:

The above story is based on materials provided by Virginia Tech (Virginia Polytechnic Institute and State University). Note: Materials may be edited for content and length.


Journal Reference:

  1. Kiomars Sefidi, Mohammad R. Marvie Mohadjer, Reinhard Mosandl, Carolyn A. Copenheaver. Coarse and Fine Woody Debris in Mature Oriental Beech (Fagus orientalisLipsky) Forests of Northern Iran. Natural Areas Journal, 2013; 33 (3): 248 DOI: 10.3375/043.033.0303

Cite This Page:

Virginia Tech (Virginia Polytechnic Institute and State University). "Dead wood alive with management information in old-growth Iranian forest." ScienceDaily. ScienceDaily, 14 April 2014. <www.sciencedaily.com/releases/2014/04/140414160814.htm>.
Virginia Tech (Virginia Polytechnic Institute and State University). (2014, April 14). Dead wood alive with management information in old-growth Iranian forest. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/2014/04/140414160814.htm
Virginia Tech (Virginia Polytechnic Institute and State University). "Dead wood alive with management information in old-growth Iranian forest." ScienceDaily. www.sciencedaily.com/releases/2014/04/140414160814.htm (accessed September 19, 2014).

Share This



More Earth & Climate News

Friday, September 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Wildfires in CA Burn Forest Asunder

Raw: Wildfires in CA Burn Forest Asunder

AP (Sep. 18, 2014) An out-of-control Northern California wildfire has nearly 2,800 people from their homes as it continues to grow, authorities said Thursday. Authorities said a man has been arrested on suspicion of arson for starting the fire on Saturday. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Man Floats for 31 Hours in Gulf Waters

Man Floats for 31 Hours in Gulf Waters

AP (Sep. 16, 2014) A Texas man is lucky to be alive after he and three others floated for more than a day in the Gulf of Mexico when their boat sank during a fishing trip. (Sept. 16) 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