烟台四十里湾叶绿素a和初级生产力的分布特征

Distribution of chlorophyll a and primary productivity in Yantai Sishili Bay

中文关键词: 四十里湾  浮游植物数量  叶绿素a  初级生产力  相关性

英文关键词: Sishili Bay  Phytoplankton density  Chlorophyll a concentration  Primary productivity  Correlation

中文摘要:

      2006~2010年5、8、10月，分别对烟台四十里湾近岸水域进行了30航次的综合调查，调查内容包括海水水质、浮游植物、叶绿素以及水文气象等要素。四十里湾近岸水域表层叶绿素a和初级生产力的季节与年际变化结果显示，浮游植物数量、叶绿素a含量和初级生产力一般在8月出现高值；仅2008年浮游植物数量最高值出现在10月，2009年叶绿素a含量和初级生产力最高值出现在5月。2008年10月浮游植物数量平均值为所有航次中最高，达到51.61×104 cells/L，且各站位间差别显著（P<0.01）；2007年10月最低，仅为0.02×104 cells/L。2006~2009年，表层叶绿素a含量和初级生产力均值呈逐年增加趋势，2009年分别达到8.72 μg/L和1 481.42 mg/m3•d；2010年（叶绿素a：6.13 μg/L；初级生产力：733.91 mg/m3•d）又降至与2008年相当。近5年，四十里湾浮游植物数量、叶绿素a含量和初级生产力均呈现湾东部高于西部的趋势，初级生产力与表层叶绿素a含量呈强正相关关系（R=0.921, P<0.01），并得出二者的回归方程式，这为海洋初级生产力的估算与评价提供了一种更简便的方法。

英文摘要:

      In May, August and October 2006~2010, thirty integrated surveys of coastal water environment were carried out in Yantai Sishili Bay (YSB) twice per month. Mornitored items included water quality, phytoplankton, surface chlorophyll-a and hydrometeorology. The spacial and temporal distribution of chlorophyll-a and primary productivity in YSB was studied. The results showed that phytoplankton density, chlorophyll-a concentration and primary productivity were generally higher in August; But in 2008，the maximum of phytoplankton density appeared in October, and in 2009 the maximums of both chlorophyll-a concentration and primary productivity appeared in May. In October 2008, the phytoplankton density, the highest during the survey period, reached 51.61×104 cells/L, and significant differences were found among all six sampling sites（P<0.01）; The lowest value (0.02×104 cells/L) appeared in October 2007. From 2006 to 2009 both chlorophyll-a concentration and primary productivity showed a growing trend, but in 2010 they decreased to a similar level as 2008. In the last five years，phytoplankton density, chlorophyll-a concentration and primary productivity were generally higher in east YSB than in the west. Furthermore, a significant positive correlation was found between primary productivity and chlorophyll-a concentration (R=0.921,P<0.01), and a regression equation was developed. It will offer an option to estimate and assess the primary productivity of the coastal waters.