Phytoplankton concentration measurements in Sydney Harbour - 20th October 2004

A study of the response of phytoplankton to rainfall in Sydney Harbour on 20th October 2004 is reported here. \n\nSydney 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. \n \nThe 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 of 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].

本文报道了一项针对2004年10月20日悉尼港浮游植物（phytoplankton）对降雨响应的研究。

悉尼港是悉尼市重要的港口与休闲活动区域。浮游植物可作为水质评价指标之一，其浓度受水体营养盐调控；而营养盐含量会随悉尼市排放的城市及工业废弃物发生变化。

本研究观测了悉尼港皮尔蒙特（Pyrmont）降雨前后的浮游植物丰度变化。2004年10月15日至11月4日降雨时段后，从表层至7米深度测得的叶绿素（chlorophyll）浓度几乎为降雨事件前的5倍。经荧光光度计（fluorometer）测得的最大叶绿素浓度为27 [微克/升]。