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 (279 KB)

Title: Applying survival analysis to a large-scale forest inventory for assessment of tree mortality in Minnesota

Author: Woodall, C.W.; Grambsch, P.L.; Thomas, W.;

Date: 2005

Source: Ecological Modelling 189 (2005) 199?208

Publication Series: Scientific Journal (JRNL)

Description: Tree mortality has traditionally been assessed in forest inventories through summaries of mortality by location, species, and causal agents. Although these methods have historically constituted the majority of tree mortality summarizations, they have had limited use in assessing mortality trends and dynamics. This study proposed a novel method of applying survival analysis for the purpose of analyzing tree mortality in forest inventories. Individual tree size and growth increments were used to estimate survival and hazard functions for a forest inventory for the state of Minnesota. These estimates provided regional mortality and variance estimates by diameter at breast height (DBH) and diameter growth classes (ΔDBH) between successive inventories. Comparisons of survival/hazard curves for various tree populations and tests of effects of covariates on individual survival curves were conducted allowing for mortality hypothesis testing across user-defined tree populations (i.e., species, location, stand conditions, and damage agents). Survival analysis techniques, facilitated by the variables of DBH and ΔDBH, may provide foresters with the ability to test tree mortality hypotheses and summarize regional tree mortality trends.

Keywords: Mortality, Survival analysis, Hazard function, Forest inventory

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.
  • This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
  • Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, shobrla@fs.fed.us if you notice any errors which make this publication unusable.

XML: View XML

Citation:


Woodall, C.W.; Grambsch, P.L.; Thomas, W. 2005. Applying survival analysis to a large-scale forest inventory for assessment of tree mortality in Minnesota. Ecological Modelling 189 (2005) 199?208

 


 [ 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.