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。本研究以美国西海岸为研究范围，按物理环境特征的相似性划分出若干大型研究区域，每个区域对应一片连续的岩岸生境斑块。每个大型研究区域内嵌套设置3个采样点，每个采样点内再嵌套3组采样区域。在每个采样区域内，于平均最低低潮位（Mean Lower Low Water）、平均海平面（Mean Sea Level）、平均最高高潮位（Mean Higher High Water）（有时还会增设超高潮位（super high water mark））处布设50米长的样带卷尺。沿每条样带，在10个50 cm × 50 cm的样方内，对所有大型藻类与无脊椎动物的丰度进行测定。同步采集一系列物理环境数据，包括岸坡朝向、坡度、砂质化程度及水温。在每个采样点安装吊环螺栓（eye bolts）与金属网笼式温度数据记录仪。