Phytoplankton concentration measurements in Sydney Harbour, Summary.

A study of the response of phytoplankton to rainfall in Sydney Harbour 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].

本文报道了悉尼港浮游植物对降雨响应的研究。悉尼港是悉尼市重要的港口及休闲区域。浮游植物可作为水质指标之一，其浓度受水中营养物质影响，而营养物质的含量被认为随悉尼市排放的城市与工业废水而变化。

研究观测了悉尼港皮尔蒙特（Pyrmont）区域降雨前后的浮游植物量。2004年10月15日至11月4日降雨期间，从表层至7米深处测得的叶绿素浓度几乎是降雨前的5倍；通过荧光计观测到的最大叶绿素浓度为27微克/升。