Seabed images taken at pilot oyster reefs in the Borkum Reef Ground marine protected area during September 2021

Imagery transects with a camera attached to a frame design for taking pictures in a 50 x 50 cm area. Seabed images transects were carried out by scientific divers during the RESTORE expedition on board the ship Arctic Ocean during September 2021, focusing on the monitoring of two pilot reefs (east and west) and the ecology of benthic assemblages in the Borkum Reef Ground marine protected area. The camera used was a Cannon EOS M6 camera, the pictures were taken perpendicularly to the seabed. The transects were done along a preset track across the reefs, number of pictures per transect varied based on diving time, with a minimum of 10 images per transect. Due to logistic problems, two transects were done for the east reef, and one for the west reef. The seabed images provide insights into the general composition of key species, higher systematic groups and ecological guilds. The images also contain valuable information on how benthic species are associated to each other. Dataset includes individual images, and metadata of each image including diving depth, date/time, and corresponding diver. Detailed geographical coordinates of individual images are unavailable.本数据集采用搭载定制框架的相机开展成像样带（imagery transects）拍摄，该框架限定单张拍摄区域为50×50厘米。2021年9月，科学潜水员搭乘"北极海洋号（Arctic Ocean）"执行RESTORE科考航次（RESTORE expedition）期间，完成了海底成像样带采集工作，重点监测博库姆礁海域海洋保护区（Borkum Reef Ground marine protected area）内的两处试点礁体（东礁与西礁），并研究该区域底栖生物群落（benthic assemblages）的生态特征。本次使用的相机为佳能EOS M6（Canon EOS M6），拍摄角度严格垂直于海底。样带沿预设航线横跨礁体布设，每条样带的拍摄数量随潜水时长灵活调整，单条样带的拍摄量不少于10张。受后勤保障问题影响，东礁共完成2条样带拍摄，西礁完成1条。本次获取的海底图像可用于解析关键物种、高级分类类群及生态功能群（ecological guilds）的整体组成情况，同时还蕴含底栖物种种间关联模式的宝贵信息。本数据集包含单张原始图像及每张图像的元数据，元数据涵盖潜水深度、拍摄日期/时间及对应潜水员信息，但单张图像的精确地理坐标未被纳入数据集。