Faunal microdistribution of a hydrothermal vent field: A 3D reconstruction approach

Structure from Motion photogrammetry was applied to build a high resolution 3D reconstruction model of an active hydrothermal chimney complex and to project quantified abundances. This technique works for any kind of video imagery, regardless of its initial purpose and can be implemented in marine monitoring and management to identify important ecological areas.

Likewise, the reconstruction was used to infer terrain variables at scales of megabenthic specimens, which were related to the abundances of the faunal assemblages. Based on the terrain variables the applied random forest model predicted the faunal assemblage distribution with an accuracy of 84.97 %. The most important structuring variables were the distances to diffuse- and black fluid exits, as well as the height of the chimney complex.