Annual Primary Productivity of Spartina alterniflora at Law's Point salt marsh on the Rowley River.

Annual productivity is determined from aboveground biomass data in a Spartina alterniflora-dominated salt marsh plots on the Rowley River within the Plum Island Ecosystems (PIE) LTER site. Aboveground biomass is determined non-destructively.

年度生产力由普卢默岛生态系统（Plum Island Ecosystems, PIE）长期生态研究（Long Term Ecological Research, LTER）站点内罗利河沿岸以互花米草（Spartina alterniflora）为优势种的盐沼样地的地上生物量数据计算得到。地上生物量采用非破坏性方法测定。