Phytoplankton concentration measurements in Sydney Harbour - 30th October 2004

A study of the response of phytoplankton to rainfall in Sydney Harbour on 30th October 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 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].

本研究报道了2004年10月30日悉尼港（Sydney Harbour）内浮游植物（phytoplankton）对降雨的响应特征。

悉尼港是悉尼市重要的港口及休闲水域。浮游植物可作为水质监测的核心指标之一，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与工业废弃物发生动态变化。

本研究对悉尼港皮尔蒙特（Pyrmont）区域降雨前后的浮游植物生物量开展了原位观测。2004年10月15日至11月4日降雨时段后，从表层至7米水深范围内测得的叶绿素（chlorophyll）浓度，几乎为降雨事件前的5倍。经荧光计（fluorometer）观测到的叶绿素最大浓度为27 [ug/litre]。