Community composition of archaeal ammonia oxidizers in Louisiana salt marshes two years after the Deepwater Horizon oil spill

This dataset contains relative abundances (%) of terminal restriction fragments of the ammonia monooxygenase genes (amoA) from ammonia-oxidizing archaea (AOA). Data are from sediments collected from 13 marshes in Terrebonne Bay (TB), western Barataria Bay (WB), and eastern Barataria Bay (EB), LA. In TB and EB, we sampled two oiled marshes and two unoiled marshes, and in WB we sampled three oiled marshes and two unoiled marshes. At each marsh, we collected 5-cm deep soil cores along a 20-m transect from the marsh edge and collecting soil samples every 5 m. Marshes in TB were sampled approximately monthly from May to September 2012, and the WB and EB marshes were sampled in July and September 2012.