Benthic marine N2 fixation

Benthic marine N2 fixation, focusing on the physiological diversity and environmental sensitivities of nitrogen fixers inhabiting the vast benthic realm, relatively understudied compared to pelagic N2 fixation.  In a project generously funded by the Simons Foundation, we use culture and field studies to answer questions such as, "Why and when do benthic diazotrophs fix N2?"; "Are the environmental responses of benthic nitrogen fixers fundamentally different from pelagic nitrogen fixers?" ; "Does benthic N2 fixation contribute substantively to marine fixed N inventories? Will climate change alter this?"