Senior Marine Scientist III,Dauphin Island Sea Lab
Emphasis: Biogeochemistry and microbial ecology; organic sulfur cycling
Here are some brief highlights of ongoing projects
The role of DMSP as an antioxidant in marine algae – With funding from the NSF Biological Oceanography program we are testing the hypothesis that DMSP and its degradation products are important scavengers of reactive oxygen species in cells of marine algae. We are using pure cultures of marine phytoplankton as well as natural populations in seawater to study the physiological responses of the algae to oxidative stresses. One of the responses we are particularly interested in is the algal degradation of DMSP to DMS, catalyzed by DMSP lyase enzymes. We are examining the activity and regulation of DMSP lyase in the oxidative stress physiology of the phytoplankton. With separate funding from EPA we are also examining the oxidative stress physiology of the marsh grass Spartina alterniflora, another DMSP producer.
Current Research Grants
National Science Foundation – Polar Programs-Antarctic Biology and Medicine. Impact of solar radiation and nutrients on biogeochemical cycling of DMSP and DMS in the Ross Sea , Antarctica . (with David Kieber, SUNY ESF).
National Science Foundation – Biocomplexity in the Environment. Complex molecular to global interactions and feedbacks in the marine DMS cycle. (with Patricia Matrai, Bigelow Laboratory, and several other PI’s).
National Science Foundation – Biological Oceanography. Production and dynamics of DMSP and related compounds in response to oxidative stress in marine phytoplankton. (with David Kieber, SUNY ESF ).
National Science Foundation – Microbial genetics. Bacterial Regulation of Organic Sulfur Cycling in the Ocean: A Genomic Approach.. sub-contract from Univ. Georgia , under grant to Mary Ann Moran.
Environmental Protection Agency – Alabama Center for Estuarine Studies. Oxidative stress protection by dimethylsulfoniopropionate(DMSP) in Spartina alterniflora.
|Current Graduate Students||Post Doctoral Associates||Technicians|
|J. Daniel Husband||Doris Slezak||Jennifer Meeks|
|Daniela del Valle|