Monitoring Porto 2006-2008

The data was collected under the MARBEF BIOFUSE long term monitoring program.
Each participant of this program is selected 5 shores, chosen to maximise likelihood of differences in diversity (e.g. along gradient of stress - wave exposure, pollution, etc or with different recruitment regimes). Fixed sampling units randomly selected. Size of sampling Atlantic 50 x 50 cm quadrat. 5 quadrats, grid of 25 squares used to give visual estimate to nearest 5 % cover. 2 samples per year (ie every 6 months) for 2 years commencing Winter 2005-6. Taxonomic resolution: best possible resolution achievable non-destructively in the field, including macrofauna (visible to naked eye).

本数据集采集自MARBEF BIOFUSE长期监测项目。该项目的每个采样单元均选取5处海岸，以最大化物种多样性差异的出现概率——例如沿压力梯度（波浪暴露、污染等）或采用不同生物招募机制的海岸。固定采样单元采用随机选取方式。采样样方规格为50 cm × 50 cm的大西洋式样方。针对5个样方，使用带有25个方格的网格进行目视覆盖度估测，估测精度可达5%。自2005-2006年冬季起，连续2年每年开展2次采样（即每6个月采集1次）。分类学分辨率采用野外可实现的最高无损识别精度，涵盖肉眼可见的大型底栖动物（macrofauna）。