Document


Title

Succession-driven changes in soil respiration following fire in black spruce stands of interior Alaska
Document Type: Journal Article
Author(s): K. P. O'Neill; D. D. Richter; E. S. Kasischke
Publication Year: 2006

Cataloging Information

Keyword(s):
  • age classes
  • black spruce
  • boreal forests
  • boreal forests
  • C - carbon
  • calcium
  • carbon balance
  • CO2 - carbon dioxide
  • decomposition
  • decomposition
  • disturbance
  • ecosystem dynamics
  • fire frequency
  • fire intensity
  • fire management
  • forest management
  • interior Alaska
  • K - potassium
  • magnesium
  • microbial activity
  • microclimate
  • microorganisms
  • moisture
  • moss
  • mosses
  • nitrogen
  • organic soils
  • pH
  • post-fire recovery
  • roots
  • soil management
  • soil moisture
  • soil organic matter
  • soil temperature
  • soils
  • statistical analysis
  • succession
  • temperature
  • wildfires
Record Maintained By:
Record Last Modified: September 16, 2018
FRAMES Record Number: 47641
Tall Timbers Record Number: 23619
TTRS Location Status: In-file
TTRS Call Number: Fire File
TTRS Abstract Status: Fair use, Okay, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

Boreal forests are highly susceptible to wildfire, and post-fire changes in soil temperature and moisture have the potential to transform large areas of the landscape from a net sink to a net source of carbon (C). Understanding the ecological controls that regulate these disturbance effects is critical to developing models of ecosystem response to changes in fire frequency and severity. This paper combines laboratory and field measurements along a chronosequence of burned black spruce stands into regression analyses and models that assess relationships between moss succession, soil microclimate, decomposition, and C source-sink dynamics. Results indicate that post-fire changes in temperature and substrate quality increased decomposition in humic materials by a factor of 3.0 to 4.0 in the first 7 years after fire. Bryophyte species exhibited a distinct successional pattern in the first five decades after fire that corresponded to decreased soil temperature and increased C accumulation in organic soils. Potential rates of C exchange in mosses were greatest in early successional species and declined as the stand matured. Residual sources of CO2 (those not attributed to moss respiration or humic decomposition) increased as a function of stand age, reflecting increased contributions from roots as the stand recovered from disturbance. Together, the field measurements, laboratory experiments, and models provide strong evidence that interactions between moss and plant succession, soil temperature, and soil moisture largely regulate C source-sink dynamics from black spruce systems in the first century following fire disturbance. © Springer 2006.

Citation:
O'Neill, K. P., D. D. Richter, and E. S. Kasischke. 2006. Succession-driven changes in soil respiration following fire in black spruce stands of interior Alaska. Biogeochemistry, v. 80, no. 1, p. 1-20. 10.1007/s10533-005-5964-7.