春季太湖光量子产额空间分布的特征分析

基于2009年4月28日、5月4日、5月5日及5月6日在太湖梅梁湾的栈桥头、直湖港的河口区、太湖中心及胥口湾中心测定的初级生产力及水下光场数据,计算了各测点的藻类光量子产额和P-I曲线,并分析了其空间差异的特征.太湖栈桥头的P-I曲线呈现出明显的光抑制现象;在胥口湾中心和直湖港河口,P-I曲线呈现出弱的光抑制现象;而在太湖中心区域,P-I曲线只达到了光饱和状态,并未出现光抑制现象.单位叶绿素a的最大光量子产额的大小顺序为太湖中心区域、梅梁湾的栈桥头、直湖港的河口区及胥口湾的湖心区.

Analysis on the Spatial Characteristics of the Light Quantum Yields in Lake Taihu in Spring

Based on the primary productions and underwater irradiance in the head of the jetty in a station of the Lake Taihu ecology network of the Chinese academia, Zhihugang estuary area, the center of Lake Taihu and Xukou Bay at April 28, May 4,May 5, May 6 in 2009, the light quantum yields of algae and P-I curve were calculated. Then the spatial characteristics were analyzed. There was significant photoinhibition in the head of the jetty in a station of the Lake Taihu ecology network of the Chinese academia; there was not appreciable photoinhibition in Zhihugang estuary area and the center of Xukou Bay; and there was only light-saturation phenomena in the center of Lake Taihu. The order of the light quantum yield per Chl-a was the center of Lake Taihu, the head of the jetty, Zhihugang estuary area and the center of Xukou Bay.