Skip to main content

FRAMES logo
Resource Catalog

Document

Type: Journal Article
Author(s): Luhong Zhou; Shangshi Liu; Yaning Gu; Linfang Wu; Hang-Wei Hu; Ji-Zheng He
Publication Date: 2023
  1. The impact of fire on above-ground biomass has significant consequences on soil carbon (C) dynamics, which is essential in predicting the global C budget during the Anthropocene. However, there is considerable spatiotemporal variability in the directions and magnitudes of fire effects on soil respiration, and the drivers associated with these effects are not well understood.
  2. Here, we conducted a global meta-analysis of 1327 individual observations from 170 studies to determine the extent to which fire influenced soil total respiration (Rs), heterotrophic respiration (Rh) and autotrophic respiration (Ra).
  3. We found fires reduced Rs, Rh and Ra, with an average effect of -11.0%, -17.5% and -40.6%, compared with unburnt sites. Specifically, wildfires significantly reduced Rs and Rh (-20.4% and -25.0%, respectively), and prescribed fire significantly decreased Ra (-74.8%). The influences of fire on Rs and its components were moderated by fire severity, season, type, climate zones and biomes. After several years from the time of the fire, the negative effects of fire on Rs diminished and then recovered to a state not significantly different from unburnt sites; Rh exhibited a similar but decayed temporal response. Similarly, the negative effects on Ra disappeared after 3 years following the latest fire. The magnitude of the effect on Rs was strongly associated with soil temperature, cation exchange capacity, total nitrogen (N) content and N-acquiring enzyme activity. In contrast, the magnitude of the effect on Rh significantly changed with pH, bulk density, texture, soil C and nutrient contents, and C-acquiring enzyme activity.
  4. Our findings advance the understanding of the inhibition and associated mechanisms of fire on Rs and its components, highlighting the need for new research efforts to predict the spatial-temporal shifts in underground C-cycling induced by fire.
Online Links
Link to this document
Citation: Zhou, Luhong; Liu, Shangshi; Gu, Yaning; Wu, Linfang; Hu, Hang-Wei; He, Ji-Zheng. 2023. Fire decreases soil respiration and its components in terrestrial ecosystems. Functional Ecology 37(12):3124-3135.

Cataloging Information

Topics:
Fire Effects    Prescribed Fire
Regions:
International    National    Alaska    California    Eastern    Great Basin    Hawaii    Northern Rockies    Northwest    Rocky Mountain    Southern    Southwest
Keywords:
  • soil carbon
  • soil respiration
Record Last Modified:
Record Maintained By: FRAMES Staff (https://www.frames.gov/contact)
FRAMES Record Number: 69231