Featured Research

from universities, journals, and other organizations

Faster Hawaiian Tree Growth Without Adverse Ecosystem Effects

Date:
March 31, 2008
Source:
US Forest Service, Pacific Southwest Research Station
Summary:
US Forest Service scientists with the Institute of Pacific Islands Forestry have completed a study on ways to make high-value koa trees grow faster, while increasing biodiversity, carbon sequestration, scenic beauty and recreation opportunities in native Hawaiían forests.

Janis Haraguchi, an Institute of Pacific Islands Forestry biologist, measures the diameter of an Acacia koa tree. Haraguchi and other US Forest Service scientists found the stem diameter of koa trees with timber potential doubled through a combination of treatments that included thinning, herbicides and fertilizers.
Credit: U.S. Forest Service

U.S. Forest Service scientists with the Institute of Pacific Islands Forestry have completed a study on ways to make high-value koa trees grow faster, while increasing biodiversity, carbon sequestration, scenic beauty and recreation opportunities in native Hawaiían forests.

Acacia koa is a native Hawaiían hardwood tree that traditionally has been prized as a craft and furniture-making wood. Its range has been greatly reduced because of logging and land clearing for agricultural production.

Scientists involved in the study have published their findings in the April edition of Forest Ecology and Management. The article is entitled, "Understory Structure in a 23-Year-Old Acacia Koa Forest and Two-Year Growth Responses to Silvicultural Treatments."

Previous studies have shown that a lack of knowledge about koa tree production has hampered commercial forestry investment efforts in Hawaií.

Scientists in this study began to fill this knowledge gap in 2002 when they started measuring how koa trees respond to the thinning of competing trees and the application of fertilizers. They were also concerned about how the trees and understory plants responded to chemical control of non-native grasses because about 20 percent of endangered plants in Hawaií are understory species found in koa forests.

They found the potential koa crop trees in the test area on the eastern slope of Mauna Loa annually increased their stem diameter at chest height by nearly 120 percent.

In addition, they found the treatments did not adversely affect the growth of native understory plants and non-native grasses did not grow more where tree thinning had occurred. Scientists even found fertilizers reduced the growth of these alien grasses when compared to unfertilized test plots.

The study's findings also showed the treatments were either neutral or beneficial to forest bird habitat, an important consideration because many trees in koa forests bear fleshy fruits or provide habitat for insects eaten by many Hawaiían birds.

"Our findings indicate the use of low-impact silvicultural treatments in young koa stands not only increases wood production, but also is compatible with maintenance of healthy, intact native understory vegetation," said Paul

Scowcroft, an Institute of Pacific Islands Forestry research ecologist and one of the study's authors.


Story Source:

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


Cite This Page:

US Forest Service, Pacific Southwest Research Station. "Faster Hawaiian Tree Growth Without Adverse Ecosystem Effects." ScienceDaily. ScienceDaily, 31 March 2008. <www.sciencedaily.com/releases/2008/03/080327093626.htm>.
US Forest Service, Pacific Southwest Research Station. (2008, March 31). Faster Hawaiian Tree Growth Without Adverse Ecosystem Effects. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2008/03/080327093626.htm
US Forest Service, Pacific Southwest Research Station. "Faster Hawaiian Tree Growth Without Adverse Ecosystem Effects." ScienceDaily. www.sciencedaily.com/releases/2008/03/080327093626.htm (accessed October 22, 2014).

Share This



More Plants & Animals News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

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
San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

Reuters - Light News Video Online (Oct. 22, 2014) — The pair of rare white northern rhinos bring hope for their species as only six remain in the world. Elly Park reports. Video provided by Reuters
Powered by NewsLook.com
Raw: Bear Cub Strolls Through Oregon Drug Store

Raw: Bear Cub Strolls Through Oregon Drug Store

AP (Oct. 22, 2014) — Shoppers at an Oregon drug store were surprised by a bear cub scurrying down the aisles this past weekend. (Oct. 22) Video provided by AP
Powered by NewsLook.com
Family Pleads for Pet Pig to Stay at Home

Family Pleads for Pet Pig to Stay at Home

AP (Oct. 22, 2014) — The Johnson family lost their battle with the Chesterfield County, Virginia Planning Commission to allow Tucker, their pet pig, to stay in their home, but refuse to let the board keep Tucker away. (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