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作者于1992年2、5、6、8和10月在象山港湖头渡，5月和6月在大佳河（港顶部）、西沪港（港中部）和横山（近港口区）4条断面潮滩进行了底栖微型藻现存生物量和初级生产力的观测研究．结果表明，潮滩表层叶绿素a浓度分布具有明显的空间区域性和时间变异性特征．港顶部的浓度高于港中部和近港口区；滩面表层的平均叶绿素a浓度，5月[（10．36±8．08）μg／g湿重]高于6月[（2．94±1．21）μg／g湿重]．由于光的限制，沉积物中的叶绿素a主要分布在表层0～1cm，随深度的增加浓度下降，但其降解产物──脱镁叶绿素的浓度却增大．松软、平整、稳定的滩面有利于底栖微型藻类的生长，5、6月湖滩表层平均初级生产力为（45．1±46．8）mg／（m2·h）（C）．湖头渡潮滩叶绿素a浓度以夏季最高，春、秋季次之，冬季最低；初级生产力仍以夏季最高，春、冬季较低，秋季最低．
The authors studied at Lake Tau crossing in Xiangshan Port in May, June, August and October 1992 and at Daya River (top of Hong Kong), West Shanghai Harbor (Mid Harbor) and Hengshan (near port) 4 in May and June Section of the tidal flat of benthic microalgae of the existing biomass and primary productivity observations. The results showed that the distribution of chlorophyll a in tidal flat had obvious spatial and temporal variability. The concentration of chlorophyll a in the surface of the beach surface was higher than that in June [(10.36 ± 8.08) μg / g wet weight) in May [(2.94 ± 1.21) μg / g wet weight]. Due to the limitation of light, chlorophyll a in sediments mainly distributed in the surface layer 0 ~ 1cm, with the increase of the depth of concentration decreased, but the degradation product ─ ─ pheophytin concentrations increased. The soft, flat and stable beach surface is conducive to the growth of benthic micro-algae. The average primary productivity of beach surface in May and June was (45.1 ± 46.8) mg / (m2 · h) (C). The concentration of chlorophyll-a in the tidal flat at the head of the lake was the highest in summer, the lowest in spring and autumn and the lowest in winter. The primary productivity remained the highest in summer, the lowest in spring and winter and the lowest in autumn.