NWFSC fish and invertebrate diversity derived from west coast groundfish trawl program

This dataset presents the community structure of groundfish and invertebrate in the West Coast since 1977. The community structure indices include the richness and Simpson’s evenness. The raw count data is from West Coast Groundfish Bottom Trawl survey conducted by the Northwest Fisheries Science Center. The spatial coverage of this dataset is between Pt Conception, California and north of U.S.-Mexico border.本数据集呈现了1977年以来美国西海岸底层鱼类（groundfish）与无脊椎动物的群落结构。其群落结构指数包含物种丰富度与辛普森均匀度（Simpson's Evenness）。原始计数数据源自西北渔业科学中心（Northwest Fisheries Science Center）开展的西海岸底层鱼类底拖网调查（West Coast Groundfish Bottom Trawl Survey）。该数据集的空间覆盖范围为加利福尼亚州康塞普西翁角（Pt Conception）至美墨边境以北区域。