东海赤潮高发区春季叶绿素a和初级生产力的分布特征  

Distribution features of chlorophyll a and primary productivity in high frequency area of red tide in East China Sea during Spring

作　　者：周伟华[1] 霍文毅[1] 袁翔城[1] 殷克东[1] 

机构地区：[1]中国科学院南海海洋研究所热带海洋环境动力学重点实验室,广州510301

出　　处：《应用生态学报》2003年第7期1055-1059,共5页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划资助项目 ( 2 0 0 1CB40 970 0 );中国科学院知识创新工程资助项目 (ZKCX2-SW-2 12 );国家杰出青年科学基金资助项目 ( 4 0 12 5 0 16) .

摘　　要：20 0 2年 4～ 5月对东海海域进行了综合调查 ,分析了海区叶绿素a和初级生产力的分布特性 .结果表明 ,大面站表层平均叶绿素a浓度为 1.0 86mg·m-3 .分级叶绿素a结果显示 ,春季东海浮游植物以微型和微微型 (<2 0 μm)占优势 ,其对海区叶绿素a的贡献为 6 4 % ,超微型浮游植物 (<5 μm)占浮游植物生物量的 2 7% .营养盐分布和浮游动物的摄食压力影响了叶绿素a及其粒级结构的分布 .平均初级生产力为 10 .0 91mg·m-3 ·h-1,赤潮跟踪的R 0 3、RL 0 1、RG 0 1站的平均初级生产力为 399.984mg·m-3 ·h-1.光和营养盐成为叶绿素和初级生产力平面分布的主要限制因子 .表层叶绿素a和初级生产力均在调查海区的 12 3°E纵断面冲淡区产生高值区 .DC 11站浮游植物生物量异常高 ,表层叶绿素a达到 9.0 82mg·m-3 ,初级生产力为 12 8.79mg·m-3 ·h-1,但并未出现水色异常 .The distributions of chlorophyll a and primary productivity were determined during April to May 2002 in the East China Sea. The results showed that the average concentration of chlorophyll a was 1.086 mg·m -3 at surface layer,and that nano-and pico-phytoplankton (<20μm) dominated the phytoplankton biomass in this sea region during Spring (up to 64% of total chlorophyll a content). Ultra-phytoplankton (<5μm) consisted 27% of total phytoplankton biomass. Nutrients and feeding pressure of zooplankton affected the distribution of chlorophyll a and its size-fractionation. The average primary productivity was 10.091 mg·m -3·h -1,while that of red tide tracking stations R-03, RL-01 and RG-01 was 399.984 mg·m -3·h -1. Light and nutrients were the main factors affecting the distributions of chlorophyll a and primary productivity. The station DC-11 had a high concentration of phytoplankton biomass.The surface layer concentration of chlorophyll a and primary productivity were up to 9.082 mg·m -3 and 128.79 mg·m -3·h -1, respectively,but the color of the seawater was normal.

关 键 词：叶绿素A 初级生产力 分布 赤潮 东海 

分 类 号：Q175.53[生物学—水生生物学]