PISCO: Subtidal: MLPA baseline: Central Coast: Community Surveys: Fish Surveys 2008

This metadata record documents the fish surveys for MLPA subtidal community surveys. Fish sampling consists of recording the number and size of all non-cryptic fishes on 'transects.' At each sampling location 'bottom,' 'mid-water,' and 'canopy' transects are surveyed. Dimensions for all transects are 2m x 2m x 30m. Subtidal community structure surveys are conducted annually at all sites during the summer or early fall, and quantify substrate type and relief, benthic cover, abundance of major groups of macroalgae and invertebrates, and abundance and size of fishes. Spatial allocation of sampling is designed to measure year-to-year site-wide variability in community structure and the spatial scales at which such variation occurs. A site is defined as a fixed stretch of coastline, occupying approximately 500m. In 2007, many new sites were added for monitoring MPAs established by the MLPA along the coast of central California, each comprised of 12 transects stratified across the four zones described above.

本元数据记录针对MLPA潮下带群落调查中的鱼类调查项目。鱼类采样工作通过在“样带（transects）”上记录所有非隐蔽性鱼类的数量与体长完成。在每个采样点位，均需开展“底栖层（bottom）”“中层水体（mid-water）”以及“冠层（canopy）”三类样带的调查。所有样带的尺寸均为2米×2米×30米。潮下带群落结构调查于每年夏季或早秋在所有调查点位开展，调查内容涵盖底质类型与地形起伏度、底栖覆盖度、大型藻类及无脊椎动物主要类群的丰度，以及鱼类的丰度与体长。采样的空间布设方案旨在量化群落结构在点位尺度上的年际变化，以及此类变化发生的空间尺度。单个调查点位被定义为一段固定的海岸线段，长度约为500米。2007年，为监测MLPA在加州中部沿岸设立的海洋保护区（MPAs），新增了大量调查点位；每个点位均布设12条样带，且按前述四类区域进行分层布设。