(S1 Table) Presence and absence response data of Vazella pourtalesi collected between 1997 and 2017@en

Vazella pourtalesi presence and absence data were obtained from several different sources: DFO's multispecies trawl survey conducted in the Maritimes Region between 2007 to 2017 (presences and absences), DFO optical (in-house camera/video and remotely operated vehicle) benthic surveys conducted between 2001 and 2017 (presences only), and commercial bycatch records from the Fisheries Observer Program (FOP) from 1997 to 2007, and 2010 to 2015 (presences only). The DFO multispecies trawl survey is stratified random (by depth) and conducted using primarily Western IIA trawl gear. The average distance of these tows is ~ 3.17 km. Absence records were created from null (zero) catches that occurred in the same surveys. Commercial bycatch data between 1997 to 2007 from the Fisheries Observer Program was further post-processed and validated for accuracy, while the data from 2010 to 2015 was extracted directly from the Maritimes Fishery Science Database managed by DFO. Commercial trawls are much longer in duration and may follow bottom contours and/or retrace their footprint through the course of a 10+ km tow. For both the DFO multispecies trawl survey and FOP data, start coordinates were used to represent the tow, whereas for the DFO benthic imagery survey data the actual location of the V. pourtalesi record in situ was used. A 1 x 1 km grid matching that of the environmental data was placed over the study area and the presence-absence data were reduced to one record per cell, with a presence taking precedence over an absence if both occurred in the same cell. This gave a total of 215 presences (102 from the DFO trawl surveys, 47 from DFO benthic science surveys, and 66 from the FOP) and 2867 absences for the model.Vazella pourtalesi（波氏扁形苔藓虫）的存在与不存在数据来源于多个不同渠道：2007年至2017年间在加拿大海洋省份区域开展的加拿大渔业与海洋部（DFO）多物种拖网调查（包含存在与不存在记录）、2001年至2017年间开展的DFO光学（内部相机/视频系统与遥控无人潜水器）底栖调查（仅包含存在记录），以及1997年至2007年、2010年至2015年渔业观察员计划（Fisheries Observer Program, FOP）的商业兼捕记录（仅包含存在记录）。DFO多物种拖网调查采用按深度分层的分层随机抽样方案，主要使用Western IIA型拖网设备开展作业，单次拖网的平均距离约为3.17千米。不存在记录源自上述调查中渔获量为零的采样站位。1997年至2007年的渔业观察员计划商业兼捕数据经过了进一步后处理与准确性验证，而2010年至2015年的数据则直接提取自DFO管理的海洋省份渔业科学数据库。商业拖网作业的持续时间更长，作业过程中可沿海底地形行进或重复跨越作业区域，单次拖网距离可达10千米以上。针对DFO多物种拖网调查与FOP数据，均以拖网起始坐标代表该采样站位；而DFO光学底栖影像调查数据，则直接采用V. pourtalesi记录的原位实际采集位置。研究区域布设了与环境数据匹配的1×1千米网格，将存在-不存在数据聚合至每个网格单元内，若同一单元同时存在两类记录，则以存在记录优先。最终模型数据集共包含215条存在记录（其中102条来自DFO拖网调查、47条来自DFO底栖科学调查、66条来自FOP）与2867条不存在记录。