Community composition of ammonia oxidizing archaea in Louisiana salt marshes four years after the Deepwater Horizon oil spill (2014)

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 12 marshes in Terrebonne Bay (TB), western Barataria Bay (WB), and Port Sulfur in eastern Barataria Bay (PS), LA. In each region, we sampled two 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. All sites were samples in July 2014, with an additional sampling date in May and September 2014 at the TB sites.