Photoquadrat survey of hard substratum assemblages around Casey Station: boulders and boulder fields.

A survey of the epibenthic fauna of hard-substrata was made around Casey Station, using a camera mounted on a frame to take photoquadrats. A nested sampling design was used with several spatial scales. At each location there were two sites, approximately 50-100 m apart. At each site there were three by 15 m long transects, approximately 5 m apart. On each transect there were 2 plots, 5 m long by 2 m wide. Six photoquadrats were taken in each plot. This metadata record describes one component of this survey, photoquadrats taken in and around boulders and boulder fields. One of the aims of this survey was to determine if there is any evidence of human impacts in these assemblages. There were several control and several potentially impacted locations.The data have yet to be analysed.Also links to ASAC 1100.

本研究于凯西站周边开展硬质底质（hard-substrata）上的底上动物区系（epibenthic fauna）调查，借助安装于支架上的相机拍摄摄影样方（photoquadrats）。本次调查采用多空间尺度嵌套采样设计：每个调查点位布设2个样点，样点间距约50至100米；每个样点设置3条长15米的样线，样线间距约5米；每条样线上布设2个样方，样方规格为长5米、宽2米；每个样方内拍摄6张摄影样方照片。本元数据记录对应本次调查的一个组成部分，即采集于巨砾及其分布区域内及周边的摄影样方数据。本次调查的核心目标之一为探明这些生物群落中是否存在人类活动影响的相关证据。调查共设置多个对照点位与多个潜在受影响点位。当前该数据集尚未完成分析工作。本数据集同时关联ASAC 1100。