Navigation Links
Managing Douglas-fir forests for diversity
Date:5/8/2009

PORTLAND, Ore. May 8, 2009. Creating diverse forests for multiple uses is important to natural resource managers and landowners. A study conducted in southwestern Oregon provides forest managers with information that offers choices when managing land for a variety objectives that may include a high level of wood production, a moderate level of wood production with some wildlife habitat features, or low wood production that provides cover and forage for a wider variety of wildlife species.

"Land managers need effective approaches for creating and modifying forest stand structures to satisfy a broad range of objectives," explains Tim Harrington, a research forester at the Forest Service's Pacific Northwest Research Station. "Silvicultural treatments can be used to shift competitive interactions between conifers and hardwoods to create the desired balance between wood production and wildlife habitat."

Harrington and John Tappeiner, an emeritus Oregon State University forestry professor, initiated a study in 1983 in southwestern Oregon on Douglas-fir plantations near Cave Junction and Glendale, Oregon. During the first phase of the study, when the plantations were 1 or 2 years old, a single herbicide treatment was used to reduce hardwood density to several levels. The Douglas-fir were thinned at age 15 to leave densities of 120 to 220 dominant trees per acre.

About 8 years later (ages 23 to 25), the scientists found that:

  • Three very different stand structures emerged.

    1. Highly productive, pure stands of Douglas-fir, 39 to 52 feet tall, occurred where hardwoods were completely removed at age 2 years.
    2. Where 25 percent of the original hardwood density was retained, moderately productive stands developed with two distinct canopy layers: Douglas-fir (39 feet tall) growing above hardwoods (23 feet tall).
    3. Where the original hardwood density was retained, Douglas-fir and hardwoods occupy the same canopy layer, 26
      '/>"/>

Contact: Sherri Richardson Dodge
srichardsondodge@fs.fed.us
503-808-2137
USDA Forest Service, Pacific Northwest Research Station
Source:Eurekalert

Page: 1 2

Related biology news :

1. Managing nuclear wastes for the millennia
2. Managing uncertainty important in ecological balance: ASU researcher
3. Research leading to tools for managing bovine respiratory disease complex
4. Army can boost mission success by better managing
5. Managing carbon loss
6. New genes present drug targets for managing cholesterol and glucose levels
7. Genes from tiny algae shed light on big role managing carbon in worlds oceans
8. Emphasis on conifer forests places multiple species at risk
9. Conservation International and Toyota partner to protect Philippines rain forests
10. Peat and forests save permafrost from melting
11. Spatial patterns in tropical forests can help to understand their high biodiversity
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/13/2015)... 13, 2015 According to ... Biometrics Market Forecast & Opportunities, 2020", the global biometrics ... around 14% till 2020. The biometrics market is ... implementation and review of biometric management systems. The ... products with greater efficiency, are resulting in increasing ...
(Date:4/10/2015)... , April 10, 2015 ... addition of the "Security Competitive Profiles - NEC" ... http://photos.prnewswire.com/prnh/20130307/600769) , NEC will continue to supply ... to the market, with a company focus on the ... anticipated. Winning opportunities in the ...
(Date:4/8/2015)... April 8, 2015  Infinisource, a leading provider ... and Morpho, a leading supplier of biometric identification ... the market,s most advanced biometrically-enabled time clock, the ... time clock is setting a bold, new standard ... for the small and mid-size employer. When connected ...
Breaking Biology News(10 mins):Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2NEC Security Competitive Profile 2015 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 3
... WEST LAFAYETTE, Ind. - Bacteria are able to build camouflaged ... by manipulating a natural cellular process. , ... a pair of proteins from the bacteria Legionella pneumophila , ... divert raw materials within the cell for use in building and ...
... from LIFE the Faculty of Life Sciences at the ... different growth pattern than non-breastfed children. Breastfeeding lowers the levels ... which means that growth is slightly slower. This is believed ... life. The PhD project is part of SKOT, ...
... camera trap video footage from the forests of Thailand ... country are paying off, according to the Wildlife Conservation ... several locations across Thailand,s Western Forest Complex over the ... the lives of tigers, Asian elephants, gaurs, sun bears, ...
Cached Biology News:Purdue scientists reveal how bacteria build homes inside healthy cells 2Purdue scientists reveal how bacteria build homes inside healthy cells 3Breastfeeding promotes healthy growth 2Candid video clips from Thailand show anti-poaching efforts saving wildlife 2
(Date:4/24/2015)... PAREXEL International Corporation (NASDAQ: PRXL ), ... Partnerships in Clinical Trials named PAREXEL,s Drew Garty ... of the Year.  The honor recognizes Mr. Garty,s leadership ... MyTrials ® Data-Driven Monitoring solution. ... Partnership Awards in Boston , Mr. ...
(Date:4/23/2015)... 2015 The Thomas Brain Health ... a groundbreaking pilot study to see if early ... as little as three to six months. , ... nutritional medicine—will aggressively target and simultaneously treat the ... aging brain. These include oxidative stress, neuroinflammation, mitochondrial ...
(Date:4/23/2015)...  Neurocrine Biosciences, Inc. (Nasdaq: NBIX ) announced ... 2015 results before the Nasdaq market opens on Thursday, ... call and webcast to discuss its financial results and ... at 8:00 a.m. Eastern Time (5:00 a.m. Pacific Time). ... by dialing 866-952-1906 (US) or 785-424-1825 (International) using the ...
(Date:4/23/2015)... 2015  Veracyte, Inc. (NASDAQ: VCYT ) today ... to sell approximately $40 million of its common stock ... will purchase an aggregate of 4,907,975 shares of common ... the closing stock price on April 22, 2015. The ... including Broadfin Capital, Camber Capital, Deerfield, Longwood Capital Partners ...
Breaking Biology Technology:PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 2PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 3PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 4PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 5New Study Looks to Reverse Alzheimer’s Disease 2New Study Looks to Reverse Alzheimer’s Disease 3Neurocrine Biosciences Announces Conference Call and Webcast to Report First Quarter 2015 Results 2Veracyte, Inc. Announces $40 Million Private Placement 2Veracyte, Inc. Announces $40 Million Private Placement 3Veracyte, Inc. Announces $40 Million Private Placement 4
... DIEGO, Feb. 6 SGX Pharmaceuticals, Inc.,(Nasdaq: SGXP ) announced ... The conference information is as follows:, -- 10th Annual ... at 1:15 PM Eastern Standard Time at the Waldorf=Astoria, ... Conference: Tuesday, February 19, 2008 at 11:30 ...
... 5 BioSpecifics,Technologies Corp. (OTC Bulletin Board: BSTC) announced ... owed to it by its former CEO, Edwin H.,Wegman, ... Edwin H. Wegman,repaid the loan amount plus accrued interest ... of BioSpecifics, common stock to certain private,investors. The Estate ...
... Facility Services(R), LLC and,its family of companies ... the largest independent clinical technology maintenance and,management ... acquisition,is part of an aggressive growth strategy ... and accelerate the expansion of its,geographic footprint., ...
Cached Biology Technology:Linc Facility Services Acquires Morse Medical 2
Full-length cDNA clone CS0DJ013YG01 of T cells (Jurkat cell line) of Homo sapiens (human). [Source:Uniprot/SPTREMBL;Acc:Q86SZ3] Antigen: Recombinant Protein Epitope Signature Tag (PrEST)....
...
...
All-in-one mix, removes primers and dNTPs from PCR product for following direct sequencing...
Biology Products: