Determining the Drivers of Redox Sensitive Biogeochemistry in Humid Tropical Forests
Our objectives were to determine the spatial and temporal dynamics and drivers of soil O2 availability and redox-sensitive biogeochemical processes using easily measured and modeled parameters. We used automated soil O2 sensing coupled with measurements of soil chemical and physical properties, climate, and greenhouse gas concentrations and fluxes. These results are being used to derive quantitative relationships linking climate and soil physical properties to redox sensitive biogeochemical processes in tropical forests. We tested the hypothesis that hot spots and hot moments are driven primarily by high substrate availability using distributed sampling and field and lab fertilization experiments. To better model C and nutrient cycling and greenhouse gas fluxes in Earth system models we need to develop a more mechanistic understanding of the spatial and temporal dynamics and drivers of soil O2 availability in tropical forest soils. In this study we used field and laboratory experiments to help develop a mechanistically derived redox component for the Community Land Model (CLM) module of the Community Earth System Model (CESM).
- Research Organization:
- Univ. of California, Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE
- Contributing Organization:
- University Of California, Berkeley
- DOE Contract Number:
- SC0010567
- OSTI ID:
- 1497083
- Report Number(s):
- DOE-UCB-DE-FOA-0000749
- Resource Relation:
- Related Information: Gross, A., Lin, Y., Pett-Ridge, J., Weber, P. K., Silver, W. L. Redox conditions control microbial phosphorus uptake in humid tropical forests. Ecology, in review.O’Connell, C. S. and Silver, W. L. Hot spots and hot moments: Investigating the relationship between soil redox dynamics and greenhouse gas fluxes in a wet tropical forest. For submission to Global Change Biology.Yamamoto, K.*, O’Connell, C. S., Silver, W. L. “The effects of topography on leaf litter decomposition in a humid tropical forest ecosystem.” For submissions to Ecosystems *Undergraduate Honors Thesis advisee, UC BerkeleyLin, Y., Gross, A. and Silver, W. L. Anoxic conditions maintained high phosphorus sorption in humid tropical forest soils. In review, Biogeosciences.Lin, Y., Gross, A. and Silver, W. L. Rainfall effects on phosphorus fractions in wet tropical forest soils. For submission to JGR-Biogeosciences.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Forest response to increased disturbance in the central Amazon and comparison to western Amazonian forests
Quantification and Controls of Wetland Greenhouse Gas Emissions