Multiple members of the Cherry lab presented their research at the CERF virtual conference this week. Dr. Cherry (on behalf of former grad student Erin Smyth) and Taylor Ledford, a graduate student in the Mortazavi lab, presented back-to-back anchor talks in the Coastal Restoration: Challenges, Successes and Innovations Session. They presented on projects examining the recovery of ecosystem functions in constructed marshes, which were conducted as part of the CRIMSON project.  Dr. Shelby Rinehart, a postdoc in the Cherry lab, and graduate students, Jake Dybiec and Emily Fromenthal, also presented posters on their CRIMSON research. Their posters examined burrowing crab impacts on marsh soils, sediment flux dynamics, and shifts in insect functional groups in natural and constructed marshes along the Fowl River in Alabama. 

A new paper by Simpson and others, published this week in Oecologia, details changes in mangrove cay size over time, as well as differences in forest structure and hydro-edaphic characteristics of paired cays with and without bird rookeries. Rookeries represent a potential source of nutrient inputs to mangrove systems that can serve as a proxy for increases in anthropogenic nutrient loading to coastal ecosystems. Cays with bird rookeries disappeared 13 times faster than those without birds, and these losses corresponded with lower soil organic matter, lower soil total nitrogen and carbon content, greater aboveground biomass, and greater leaf nitrogen concentration on rookery cays. Collectively, these results suggest that nutrient enrichment may reduce ecosystem stability and accelerate cay loss. 

Drs. Cherry and Mortazavi both presented aspects of their collaborative research comparing ecosystem functions in natural and constructed wetlands at this week's Alabama Water Resources Conference. Mortazavi presented on the the recovery of nitrogen removal capacity in two constructed marshes along the Fowl River in Alabama, while Cherry presented on the recovery of carbon storage capacity in those same wetlands. Theses studies were carried out by a team of graduate students and postdocs in the Cherry and Mortazavi labs as part of the ongoing CRIMSON project. 

A second paper on research at our Fowl River marsh sites has been published in Restoration Ecology. In this study, Ledford et al. compared carbon fluxes and nitrogen removal rates between one natural and two constructed tidal marshes. Porewater ammonium, gross ecosystem productivity (GEP), ecosystem respiration, denitrification, and DNRA were similar among the three marshes, with the exception of greater denitrification in one of the two constructed sites. These results suggest that marsh restoration did recover some ecosystem functions in these 33-year-old constructed marshes.

Nigel Temple, a former M.S. student in the Cherry Lab, successfully defended his dissertation, entitled "Improving water wave measurements and understanding of its impacts on natural and restored marsh communities," at Mississippi State University today. Congratulations, Dr. Temple!