Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.0 MB byte)

Title: Size Class Distribution of Quercus engelmannii (Engelmann Oak) on the Santa Rosa Plateau, Riverside County, California

Author: Lathrop, Earl W.; Osborne, Chris; Rochester, Anna; Yeung, Kevin; Soret, Samuel; Hopper, Rochelle;

Date: 1991

Source: In: Standiford, Richard B., tech. coord. 1991. Proceedings of the symposium on oak woodlands and hardwood rangeland management; October 31 - November 2, 1990; Davis, California. Gen. Tech. Rep. PSW-GTR-126. Berkeley, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture; p. 371-376

Publication Series: General Technical Report (GTR)

   Note: This article is part of a larger document. View the larger document

Description: Size class distribution of Quercus engelmannii (Engelmann oak) on the Santa Rosa Plateau was studied to understand whether current recruitment of young oaks is sufficient to maintain the population in spite of high natural mortality and impacts of development in some portions of the plateau woodland. Sapling-size oaks (1-10 cm dbh) made up 5.56 pct, 4.17 pct and 6.58 pct of total trees sampled at hill (N=252), mesa (N=216) and valley (N=228) sites respectively where cattle were removed in 1986. Approximately 22.5 pct out of 200 trees sampled in an adjacent oak woodland (estimated to have been non-grazed for 20 years) were of sapling size. Peak abundance of Quercus engelmannii was in the 46-50 and 51-55 cm dbh size classes on hill, valley and mesa sites and in the 36-40 and 46-50 cm dbh size classes in an adjacent oak woodland. Trees in size classes larger than the 46-50 cm dbh increment declined in abundance at all four sites. Only 17.1 pct of total trees (N=896) were in sizes classes beyond 66-70 cm dbh and only two trees in size class 131-135 cm dbh. Despite the high numbers of young oaks at one of the four sites sampled, current stand size structure of Quercus engelmannii on the Santa Rosa Plateau indicates that reproduction is insufficient to maintain the present occurence and abundance of older age classes in the future.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Lathrop, Earl W.; Osborne, Chris; Rochester, Anna; Yeung, Kevin; Soret, Samuel; Hopper, Rochelle 1991. Size Class Distribution of Quercus engelmannii (Engelmann Oak) on the Santa Rosa Plateau, Riverside County, California. In: Standiford, Richard B., tech. coord. 1991. Proceedings of the symposium on oak woodlands and hardwood rangeland management; October 31 - November 2, 1990; Davis, California. Gen. Tech. Rep. PSW-GTR-126. Berkeley, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture; p. 371-376

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.