Darci Swenson

 

I am a marine biogeochemist interested in researching how changes in environmental conditions affect biogeochemical cycling of elements, particularly those of biological importance. I became a member of the Wehrmann Biogeochemistry Lab in 2018 after finishing my B.S. in Marine Science and Chemistry at the University of Miami. During my time there, I investigated how projected sea surface temperature rise would affect how microbial communities utilized dissolved phosphorus pools.

Since joining the Wehrmann lab, I’ve transitioned to sediment biogeochemistry. My dissertation will focus on iron cycling in bioturbated sediments. Supported by an NSF funded grant, I will be investigating how depositional conditions such as sediment type, bioturbation regime, and oxygen availability affect the flux of iron out of sediments, and particularly the isotopic signature of the iron being released. At present, the estimate of marine sediments as a source of iron to the ocean is not well constrained given the complexity of sedimentary environments. My research will hone-in on the isotopic signature of the iron released in a variety of depositional conditions, and hopefully contribute a means of tracking and quantifying oceanic iron that was sourced from sediments.