PISCO: Intertidal: Biodiversity Surveys: OSU: Spatially-nested Biodiversity Surveys

This metadata record documents the patterns of diversity and abundance of macro algae and invertebrates on rocky shores by using a nested sampling scheme. At the largest scale are stretches of rocky habitat that are spaced across the United States West Coast to represent major areas that are relatively similar in physical factors. Nested within each of these major areas are three sites, and nested within each of these sites are three sets of sampled areas. In each sampled area a 50 meter transect tape is placed at Mean Lower Low Water, Mean Sea Level, and Mean Higher High Water (and sometimes also the super high water mark). The abundance of all macro algae and invertebrates in 10 50 x 50 cm quadrates along each transect were measured. A suite of physical data including aspect and slope of the shore, degree of sandiness, and water temperature were collected. Eye bolts and a wire meshed caged temperature data loggers were installed at each site.

本元数据记录（metadata record）采用嵌套采样方案（nested sampling scheme），记录了岩岸大型藻类（macro algae）与无脊椎动物（invertebrates）的多样性及丰度分布模式。本方案的最大采样尺度为分布于美国西海岸的岩生生境片段，用以代表物理环境特征相对一致的主要区域。每个上述主要区域内嵌套设置3个采样点，每个采样点内又嵌套设置3组采样区域。在每个采样区域内，研究人员在平均低潮面（Mean Lower Low Water）、平均海平面（Mean Sea Level）、平均高高潮面（Mean Higher High Water，部分站点还增设了超高潮位（super high water mark））布设50米长的样带卷尺（transect tape）。沿每条样带，在10个50×50厘米的样方（quadrat）内，对所有大型藻类与无脊椎动物的丰度进行了测定。研究团队同时采集了一系列物理环境数据，包括海岸朝向（aspect）、海岸坡度（slope）、沙化程度（degree of sandiness）以及海水温度（water temperature）。每个采样点均安装了吊环螺栓（eye bolts）与带金属丝网保护罩的温度数据记录仪（wire meshed caged temperature data loggers）。