Phytoplankton concentration measurements in Sydney Harbour - 4th November 2004

A study of the response of phytoplankton to rainfall in Sydney Harbour on 4th November 2004 is reported here. Sydney Harbour is an important port and recreational region for the city of Sydney. Phytoplankton can be used as one of the indexes of water quality. The concentration of phytoplankton is influenced by the nutrients in the water and the amount of nutrients is thought to alter according to the urban and industrial wastes that drain from the city of Sydney. The amount of phytoplankton before and after rainfall at Pyrmont in Sydney Harbour was observed. The concentration of chlorophyll after a period of rainfall from the 15th October to the 4th November 2004, as measured from the surface to 7m deep, was almost 5 times as much as that as before the rain event. The maximum chlorophyll concentration observed by fluorometer was 27 [ug/litre].

本研究报道了2004年11月4日悉尼港浮游植物（phytoplankton）对降雨的响应情况。悉尼港是悉尼市重要的港口与休闲区域。浮游植物可作为水质监测指标之一，其浓度受水体中营养盐的影响；营养盐含量则会随悉尼市排放的城市及工业废弃物发生变化。本研究对悉尼港皮尔蒙特（Pyrmont）区域降雨前后的浮游植物浓度开展了观测。2004年10月15日至11月4日的降雨时段后，表层至7米水深的叶绿素浓度几乎为降雨事件前的5倍。通过荧光光度计测得的最高叶绿素浓度为27微克/升。