The influences of environmental forces under different tidal and monsoonal settings on the variability of temperature and salinity, nutrient concentrations, and phytoplankton biomass (chlorophyll-a) in a shallow and narrow Setiu Lagoon were studied during the southwest monsoon, wet period of northeast monsoon, and dry period of northeast monsoon. Vertical profiles of temperature and salinity were measured at 10 stations. Water samples were collected at the surface layer of all stations for the determination of nutrient and chlorophyll-a concentrations. The analyses showed that during the southwest monsoon, low chlorophyll-a concentrations were recorded due to limited nutrients supply as a result of strong vertical mixing of the water column and little freshwater input. Meanwhile, large river discharges and heavy rainfalls appeared to be the pushing factors that generated the salt wedges formation, which affected the scale of nutrients availability and phytoplankton biomass during the northeast monsoon. This freshwater discharge was also believed to be the responsible factor that gave rise to different magnitude of nutrient concentrations between low and high tides. The presence of anthropogenic activities in the vicinity of Setiu Lagoon contributed to elevated nutrient concentrations in the study area. However, the stoichiometric criteria of the major inorganic nutrients suggested the phytoplankton growth in the study area was possibly limited by phosphate or dissolved inorganic nitrogen (DIN), thus preventing further increase of chlorophyll-a concentrations.

研究了西南季风，东北季风湿润时期，浅潮和狭窄的Setiu泻湖中不同潮汐和季风环境下环境力对温度和盐度，养分浓度和浮游植物生物量（叶绿素a）变化的影响。和东北季风的干旱期。在10个站点测量了温度和盐度的垂直分布。在所有站点的表层收集水样，以确定营养素和叶绿素a的浓度。分析表明，在西南季风期间，低叶绿素a由于水柱强烈的垂直混合和很少的淡水输入而导致养分供应有限，因此记录到水的浓度。同时，大流量的河流和强降雨似乎是造成盐楔形成的推动因素，它影响了东北季风期间养分的可利用量和浮游植物的生物量。人们还认为，这种淡水排放是导致涨潮和退潮之间养分浓度不同的主要原因。在Setiu泻湖附近存在人为活动，这导致研究区域养分浓度升高。然而，一个浓度。