Mayberry Slough
Mayberry Slough
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Mayberry Slough is a restored wetland on Sherman Island, near Antioch. It was established in 2010 by the CA Department of Water Resources.
We are measuring eddy covariance fluxes of carbon dioxide, water vapor and methane with the eddy covariance method. And, this site has the longest data record among our wetland sites.
The site experiences much year to year variability in greenhouse gas fluxes. This variability is partly due to its position near the confluence of the San Francisco Bay Estuary and the Sacramento and San Joaquin Rivers. Hence, there is appreciable year to year differences in salinity at this locale, which can affect redox conditions and photosynthetica capacity. A summary of findings from 14 years of observations is in Delwiche et al. 2025:
Delwiche, Kyle, Jaclyn Hatala Matthes, Ariane Arias-Ortiz, Sara H. Knox, Patty Oikawa, Cove Sturtevant, Joseph Verfaillie, Daphne Szutu, Trevor F. Keenan, and Dennis Baldocchi. "Dynamic methane emissions in a restored wetland: Decadal insights into uncertain climate outcomes and critical science needs." Agricultural and Forest Meteorology 373 (2025): 110735. https://doi.org/10.1016/j.agrformet.2025.110735
This site has also been a proving ground for our development and application of information theory to better understand the complex forcings of biophysical variables on methane and carbon dioxide fluxes
Sturtevant, C., et al. (2015). "Identifying scale-emergent, non-linear, asynchronous processes of wetland methane exchange." Journal of Geophysical Research: Biogeosciences 121: 188–204.
We also conducted some spatial variation studies here, placing an additional flux tower on my old pick up truck and moving it around the wetland.
Matthes, J. H., et al. (2014). "Parsing variability in CH4 fluxes at a spatially heterogeneous wetland: Integrating multiple eddy covariance towers with high-resolution flux footprint analysis." Journal of Geophysical Research: Biogeosciences: 2014JG002642.
And we have used the site to develop relationships between proximal remote sensing indices and gas fluxes
Knox, S. H., et al. (2017). "Using digital camera and Landsat imagery with eddy covariance data to model gross primary production in restored wetlands." Agricultural and Forest Meteorology 237–238: 233–245.
Circa 2025, carbon and methane budgets were published and compared with data from our other sites
Kasak, K., et al. (2026). "Interannual Variability in Greenhouse Gas Emissions Challenges Post-Restoration Net Sink Predictions in California Delta Wetlands." Global Change Biology 32(1): e70700. https://doi.org/10.1111/gcb.70700
The site is registered in the Ameriflux network. Information and access to data can be found through the following link
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