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 (701 KB)

Title: Degradation activities, drivers, and emissions: US Forest Service LEAF Country Assessments

Author: Manley, Patricia; Mortenson, Leif; Halperin, James; Turner, Rick;

Date: 2013

Source: In: Mortenson, Leif A.; Halperin, James J.; Manley, Patricia N.; Turner, Rich L., eds. Proceedings of the international workshop on monitoring forest degradation in Southeast Asia. Gen. Tech. Rep. PSW-GTR-246. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 11-12

Publication Series: General Technical Report (GTR)

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

Description: Degradation is emerging as a common outcome of forest activities, and associated greenhouse gas (GHG) emissions have the potential to be significant. Understanding the activities and drivers of degradation is central to the ability to effectively measure, monitor, and mitigate associated emissions. Current inventories of GHG emissions do not effectively account for degradation because emissions are difficult to detect. We conducted an assessment of degradation activities and monitoring options at the subnational scale within three countries in Southeast Asia: Viet Nam, Cambodia and Lao PDR. Visual surveys were conducted in the first half of 2012 across districts (Con Cuong, Aural, and Viengxay and Xamtai, respectively), which were ~200,000 ha in size. We found six primary degradation activities that were present in all districts, and common in one or more of them: planned selective tree harvest, unplanned selective tree harvest, commercial fuelwood collection, customary fuelwood collection, shifting cultivation, and wildfire. Timber harvest was widespread in all three assessments, whereas the other activities varied in their extent among the districts. Shifting cultivation was quite commonly occurring in Lao PDR, wildfire was a concern in all districts, but was prevalent in Cambodia. Fuelwood collection occurred in all districts, but was widespread and intensive in some locations in Viet Nam. The character of degradation activities affects their ability to be adequately measured and monitored with available methods. Characteristics affecting the ability of measurement methods to detect and adequately describe (i.e., accuracy and precision) include: occurrence (rare or common), spatial extent (limited or extensive), intensity (low or high impact), and temporal persistence (shifting, recurring, or chronic). A composite description of the spatial and temporal characteristics of individual degradation activities for a given landscape provides a blueprint for designing measurement approaches that are effective and efficient. Similarly, proposed survey and monitoring designs can be evaluated relative to which degradation activities are expected to be detected and how well their impact will be captured. The characteristics of degradation activities across a given landscape (at any scale) can and will change in response to a variety of influences, including land use, resource use policies, and market forces. Characterizations and subsequent measurement and monitoring approaches need to be robust to changes in degradation activities over time.

Keywords: forest degradation monitoring, Southeast Asia, climate change, carbon

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:


Manley, Patricia; Mortenson, Leif; Halperin, James; Turner, Rick. 2013. Degradation activities, drivers, and emissions: US Forest Service LEAF Country Assessments. In: Mortenson, Leif A.; Halperin, James J.; Manley, Patricia N.; Turner, Rich L., eds. Proceedings of the international workshop on monitoring forest degradation in Southeast Asia. Gen. Tech. Rep. PSW-GTR-246. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 11-12.

 


 [ 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.