Phenophases alter the soil respiration-temperature relationship in an oak-dominated forest

Jared L. DeForest; Askoo Noormets; Steve McNulty; Ge Sun; Gwen Teeney; Jiquan Chen

Treesearch

Phenophases alter the soil respiration-temperature relationship in an oak-dominated forest

Informally Refereed

Authors:

Jared L. DeForest, Askoo Noormets, Steve McNulty, Ge Sun, Gwen Teeney, Jiquan Chen

Year:

2006

Type:

Scientific Journal

Station:

Southern Research Station

Source:

Int. J. Biometerol, Vol. 51: 135-144

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Abstract

Soil respiration (SR) represents a major component of forest ecosystem respiration and is influenced seasonally by environmental factors such as temperature, soil moisture, root respiration, and litter fall. Changes in these environmental factors correspond with shifts in plant phenology. In this study, we examined the relationship between canopy phenophases @re-growth, growth, predormancy, and dormancy) and SR sensitivity to changes in soil temperature (T_s). SR was measured 53 times over 550 days within an oak forest in northwest Ohio, USA. Annual estimates of SR were calculated with a Q₁₀ model based on Ts on a phenological (PT), or annual timescale (AT), or Ts and soil volumetric water content (VWC) on a phenological (PTM) or annual (ATM) timescale. We found significant (p

Keywords

Oak openings, oak phenology, soil respiration, soil temperature, temperature sensitivity (Q10)

Citation

DeForest, Jared L.; Noormets, Askoo; McNulty, Steve G.; Sun, Ge; Teeney, Gwen; Chen, Jiquan. 2006. Phenophases alter the soil respiration-temperature relationship in an oak-dominated forest. Int. J. Biometerol, Vol. 51: 135-144