Back to Search
Start Over
Greenhouse trace gases in deadwood
- Source :
- Biogeochemistry
-
Abstract
- Deadwood, long recognized as playing an important role in storing carbon and releasing it as CO2 in forest ecosystems, is more recently drawing attention for its potential role in the cycling of other greenhouse trace gases. Across three Northeastern and Central US forests, mean methane (CH4) concentrations in deadwood were 23 times atmospheric levels (43.0 μL L−1 ± 12.3; mean ± SE), indicating a lower bound, mean radial wood surface area flux of ~6 × 10−4 μmol CH4 m−2 s−1. Site, decay class, log diameter, and species were all highly significant predictors of CH4 abundance in deadwood, and diameter and decay class interacted as important controls limiting CH4 concentrations in the smallest and most decayed logs. Nitrous oxide (N2O) concentrations were negatively correlated with CH4 (r2 = −0.20, p < 0.001) and on average ~25 % lower than ambient (276.9 nL L−1 ± 2.9; mean ± SE), indicating net consumption of nitrous oxide. Oxygen (O2) concentrations were uniformly near anaerobic (355.8 μL L−1 ±1.2; mean ± SE), and CO2 was elevated from atmospheric (9336.9 μL L−1 ± 600.6; mean ± SE). Most notably, our observations that CH4 concentrations were highest in the least decayed wood, may suggest that methanogenesis is not fuelled by structural wood decomposition but rather by consumption of more labile nonstructural carbohydrates.
- Subjects :
- 0106 biological sciences
010504 meteorology & atmospheric sciences
Chemistry
Methanogenesis
chemistry.chemical_element
Flux
Nitrous oxide
15. Life on land
01 natural sciences
Oxygen
Decomposition
Methane
Trace gas
chemistry.chemical_compound
13. Climate action
Environmental chemistry
Environmental Chemistry
Cycling
010606 plant biology & botany
0105 earth and related environmental sciences
Earth-Surface Processes
Water Science and Technology
Subjects
Details
- Language :
- English
- ISSN :
- 1573515X and 01682563
- Volume :
- 130
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Biogeochemistry
- Accession number :
- edsair.doi.dedup.....d992a8f196a2ebd960368fe1f7d46858
- Full Text :
- https://doi.org/10.1007/s10533-016-0253-1