Vent assemblage and substratum of the Eiffel Tower hydrothermal edifice from 1994 to 2008

The Eiffel Tower hydrothermal edifice is a large structure of ~450 m2 located 1700 m deep at the Lucky Strike hydrothermal vent field. Since its discovery in 1992, the edifice has been repeatedly visited at pluriannuel time scales. Photomosaics of different sides of the edifice were assembled based on videosequences acquired from 1994 to 2008. Surface of substrata and vent megafaunal assemblages were delimited and their total cover were extracted to investigate their dynamics over time.

埃菲尔铁塔热液丘（Eiffel Tower hydrothermal edifice）是一处面积约450平方米的大型构造，位于幸运罢工热液喷口场（Lucky Strike hydrothermal vent field）1700米深处。自1992年被发现以来，该构造以多年（pluriannuel）时间尺度被反复考察。基于1994年至2008年获取的视频序列（videosequences），研究人员拼接了丘体不同侧面的照片镶嵌图（photomosaics）。他们划定了基质（substrata）表面与喷口大型动物群落（vent megafaunal assemblages）的范围，并提取其总覆盖度，以探究这些群落随时间的动态变化。