Response of Terrebonne Bay and western Barataria Bay marsh soil greenhouse gas production to salinity manipulations

We quantified the effects of altering salinity (5, 15, 25, 35 ppt) and the Deepwater Horizon Oil spill on greenhouse gas (GHG) (CH4, CO2, N2O) production on laboratory incubated soils from oiled and unoiled Terrebonne and Barataria Bay salt marsh sites. These sites include 2 sets of paired oiled and unoiled marshes in both the Terrebonne Bay (Bay LaFleur and northern Lake Barre regions) and western Barataria Bay (north of Grand Isle, LA) regions of coastal LA. Soils were collected at 5, 10, 15, and 20 m from the marsh edge at each site and pooled for salinity manipulations. Additionally, we measured a series of soil properties (water content, organic matter, organic C, total N and CN ratios) on these pooled soils.我们定量分析了盐度梯度（5、15、25、35 ppt）调控以及深水地平线漏油事件对取自路易斯安那州特雷邦湾与巴拉塔里亚湾受油污染和未受油污染盐沼站点的实验室培养土壤的温室气体（GHG，包含甲烷CH4、二氧化碳CO2、一氧化二氮N2O）产生量的影响。上述采样点共包含两组配对的受油与未受油污染湿地样地，分别位于路易斯安那州沿海的特雷邦湾（拉弗勒湾及巴雷湖北部区域）与巴拉塔里亚湾西部（路易斯安那州格兰德艾尔以北区域）。每个采样点分别在距盐沼边缘5、10、15及20米处采集土壤样品，并将同一位点的土壤混合以开展盐度调控实验。此外，本研究还对上述混合后的土壤样品测定了一系列土壤理化性质，包括含水量、有机质、有机碳、全氮以及碳氮比。