Shallow biogenic gas deposits located in the surface of the seabed may affect abundance, diversity, biomass and structure of benthic communities. Nevertheless, the magnitude and responsible variables of this effect still not clear. For this, the current study applies sedimentological metrics to the different community patterns associated with gas presence detected by acoustic methods across two seasons (spring and winter). Gas-bearing sediments showed higher organic matter content, lower shear strength and greater textural homogeneity across the column. Gas trapped in sediments was found associated with changes in the structure of benthic community, in species composition as well as in relative abundance and biomass of each taxa. Also, lower total abundance, species richness and diversity and higher total biomass was found in gas site. Higher organic matter content of sediments in gas site explained benthic community patterns across seasons. Gas bubbles trapped in surface of seabed sediments changed physical and chemical properties of sediments affecting benthic communities in ways that seems comparable with shallow water gas seeps and reducing environment. Unlike the latter, gas bubbles trapped have the advantage of having been widely mapped in coastal systems by geophysicists and marine geologists, with high resolution seismic (3.5 kHz) which according to our results seems to affect benthic communities.

位于海床表面的浅层生物成因气藏可能影响底栖生物的丰度，多样性，生物量和结构。然而，这种影响的程度和负责任的变量仍然不清楚。为此，目前的研究将沉积学指标应用于与两个季节（春季和冬季）通过声学方法检测到的天然气存在相关的不同群落模式。含气沉积物在整个色谱柱中显示出较高的有机质含量，较低的剪切强度和较高的质地均匀性。发现沉积在沉积物中的气体与底栖生物群落结构的变化，物种组成以及每个分类群的相对丰度和生物量有关。此外，在气田发现总丰度较低，物种丰富度和多样性较低，而总生物量较高。气田沉积物中较高的有机质含量解释了整个季节的底栖生物群落模式。滞留在海底沉积物表面的气泡改变了沉积物的物理和化学性质，从而影响了底栖生物群落，其方式似乎与浅水气体渗漏和减少的环境具有可比性。与后者不同，捕获的气泡具有被地球物理学家和海洋地质学家广泛绘制在沿海系统中的优势，并且具有高分辨率地震（3.5 kHz），根据我们的结果，该地震似乎影响底栖生物群落。滞留在海底沉积物表面的气泡改变了沉积物的物理和化学性质，从而影响了底栖生物群落，其方式似乎与浅水气体渗漏和减少的环境具有可比性。与后者不同，捕获的气泡具有被地球物理学家和海洋地质学家广泛绘制在沿海系统中的优势，并且具有高分辨率地震（3.5 kHz），根据我们的结果，该地震似乎影响底栖生物群落。滞留在海底沉积物表面的气泡改变了沉积物的物理和化学性质，从而影响了底栖生物群落，其方式似乎与浅水气体渗漏和减少的环境具有可比性。与后者不同，捕获的气泡具有被地球物理学家和海洋地质学家广泛绘制在沿海系统中的优势，并且具有高分辨率地震（3.5 kHz），根据我们的结果，该地震似乎影响底栖生物群落。