Twitchell Island East End Restored Wetland

East End wetland was established on Twitchell Island in 2013 on a former corn field. This is an extensive wetland on peatland soils. The ecosystem vegetated naturally and fairly quickly.

The site is registered in the Ameriflux network. Information and access to data can be found through the following link

https://fluxnet.org/sites/siteinfo/US-Tw4

While the site is a strong methane source, the deployment of multiple towers has enabled us to examine how soil properties, driven by historic geomorphology, modulate methane production.

Chamberlain, S. D., et al. (2018). "Soil properties and sediment accretion modulate methane fluxes from restored wetlands." Global Change Biology  https://doi.org/10.1111/gcb.14124 

An update, circa 2025, of annual greenhouse gas fluxes, was published and compared with our other delta 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