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 below.

本元数据记录完整记录了海洋生命保护法案（Marine Life Protection Act, MLPA）潮下带群落调查中的鱼类调查工作。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个体大小完成。每个采样点位均需开展「底质样带」「中层水样带」与「冠层样带」三类样带的调查。所有样带的规格统一为2米×2米×30米。潮下带群落结构调查于每年夏季或初秋在所有调查点位开展，调查指标涵盖底质类型与底地形起伏、底栖覆盖度、主要类群大型藻类与无脊椎动物的丰度，以及鱼类的丰度与个体大小。采样的空间布设方案旨在量化群落结构在点位层面的年度间变异，以及此类变异发生的空间尺度。本调查将「点位」定义为一段固定的海岸带区段，长度约为500米。2007年，为监测由海洋生命保护法案（MLPA）在加州中部沿岸设立的海洋保护区（Marine Protected Areas, MPAs），新增了大量调查点位，每个点位均包含按下述四类生境分层布设的12条样带。