Porewater geochemistry data for sediment samples that were included in the global seep survey conducted via Alvin dives from R/V Atlantis cruise AT15-40 in the Guaymas Basin in 2008

Porewater geochemistry of Guaymas Basin hydrothermal sediments (Southern Spreading segment, 27°00.44N and 111°24.55W, 2000 m water depth) including methane, CO2, and sulfate. During two R/V Atlantis cruises to Guaymas Basin, the association of Beggiatoa mats with hydrothermal seepage and the habitat preferences of various Beggiatoa types were investigated by geochemical and microbiological characterization of sediments underneath Beggiatoa mats in combination with temperature measurements down to 40 cm sediment depth. In particular, temperature profiles and corresponding sulfide, sulfate, dissolved inorganic carbon (DIC), delta 13C-DIC, methane, and delta 13C-methane gradients from mats exhibiting orange-to-white color transitions were examined to elucidate hydrothermal fluid delivery and/or tolerance associated with differently colored Beggiatoa types

瓜伊马斯盆地热液沉积物（南部扩张段，北纬27°00.44′，西经111°24.55′，水深2000米）的孔隙水地球化学数据集，涵盖甲烷、二氧化碳（CO₂）与硫酸盐。在两次搭乘亚特兰蒂斯号（R/V Atlantis）前往瓜伊马斯盆地的科考航次中，研究团队针对贝氏硫菌（Beggiatoa）菌毯与热液渗流的伴生关系，以及各类贝氏硫菌的生境偏好展开研究：通过对贝氏硫菌菌毯下方沉积物开展地球化学与微生物学表征，并结合沉积物表层至40厘米深度的温度测量完成相关分析。本研究重点考察了呈现橙至白色渐变的菌毯所对应的温度剖面，以及相应的硫化物、硫酸盐、溶解无机碳（dissolved inorganic carbon, DIC）、δ¹³C-DIC、甲烷与δ¹³C-甲烷梯度，以阐明热液流体补给过程，以及不同颜色贝氏硫菌类群对应的环境耐受特征。