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Project ID: 10-1-10-14

Year:

Date Started: 03/01/2011

Date Completed: 09/29/2014

Title: Fuels Treatment Effects on Carbon Stocks and Insect Induced Mortality 10-Years After Treatments

Project Proposal Abstract: Pretreatment measurements were taken in 1998-1999, mechanical treatments were implemented in 2000-2001, and prescribed fire treatments were applied in 2001. As part of this project we have examined the impacts of the full range of treatments on C stocks and modeled a range of treatments over a 100 year period using FVS to quantify C stocks under simulated wildfire conditions (Hurteau and North 2009; North et al. 2009) . Carbon costs increased with increasing treatment intensity. Selecting harvest trees based on size and species to favor larger pines, stored tree-based C in the most fire-resistant structures. For seven years after treatments we have annually re-measured a subset of the trees to follow radial growth response at DBH. This preliminary data suggests a rapid diameter increase in small trees (< 75 cm DBH). However, most of our large tree samples across all fuels treatments have lower radial growth than large trees in the untreated control. Some recent research (Stone et al. 1999) suggests old-growth trees tend to have a lagged response to thinning because C is being allocated preferentially to the canopy. If allometric relationships in old-growth trees are altered by thinning activities, quantifying tree C by measuring diameter only at breast height has the potential to underestimate live tree C stocks. The objective of our research is 1) to quantify the longer term effects of fuels treatments on the release effect of residual tree growth and C sequestration; 2) determine how growth response in large old trees differs from young small trees and; 3) quantify the effects of fuels treatments on soil moisture, insect damage, tree mortality, and subsequent fuel loading.

Principal Investigator: Matthew D. Hurteau

Agency/Organization: Pennsylvania State University

Branch or Dept: School of Forest Resources


Other Project Collaborators

Type

Name

Agency/Organization

Branch or Dept

Co-Principal Investigator

George W. Koch

Northern Arizona University

Department of Biological Sciences

Co-Principal Investigator

David M. Rizzo

University of California-Davis

Plant Pathology

Federal Cooperator

Malcolm P. North

Forest Service

PSW-Sierra Nevada Research Center

Federal Fiscal Representative

Anna Wong

Forest Service

PSW-Pacific Southwest Research Station


Project Locations

Consortium

California


Level

State

Agency

Unit

STATE

CA

FS

Sierra National Forest


Project Deliverables

Final Report view or print

("Results presented in JFSP Final Reports may not have been peer-reviewed and should be interpreted as tentative until published in a peer-reviewed source.")

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Supporting Documents

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