大亚湾湾口海域冬季浮游植物生长限制性元素研究  

Studies on limited nutrient factors in outer of Daya Bay in winter

作　　者：王晓伟[1] 李纯厚[2] 戴明[2] 

机构地区：[1]广东海洋大学,广东湛江524088 [2]中国水产科学研究院南海水产研究所农业部渔业生态环境重点开放实验室,广东广州510300

出　　处：《南方水产》2007年第4期26-31,共6页South China Fisheries Science

基　　金：科技部科研院所社会公益研究专项(2005DIB3J020)

摘　　要：2005年12月11～13日,在大亚湾海域湾口设点进行浮游植物的限制性元素研究,采用现场单营养和多营养加富实验方法获得了浮游植物对添加元素的响应情况。在单营养加富实验中,铁(Fe)组增值最大,其次是氮(N)组,分别为1·1562和0·9581μg·L-1。多营养加富实验中,无Fe组和无磷(P)组在实验的第3天达到了最高值,分别为1·16151和0·8778μg·L-1。差异显著性评估结果显示,大亚湾湾口海域N和Fe元素限制了浮游植物的生长。分析认为,Fe是作为一种刺激因子在实验中起作用。N元素限制的形成,是由优势种硅藻对N元素的需求高和N限制的外海水对湾口区的影响显著共同决定。To determine the limited nutrient factors of phytoplankton growth, single and multi-enrichment experiments in suit was car- ried out to study the key limitation factor in outer of Daya Bay during 11 - 13, December, 2005. The single enrichment experiment results showed that the chl a concentration of Fe and N units had increased significantly to 1. 1562 and 0. 9581μg·L^-1 , and in multi-enrichment experiment the concentration of chl a in EFe and EP had reached a higher value to 1. 16151, 0. 8778 μg·L^-1, respectively. Time series of chlorophyll a concentrations were analyzed using one-way ANOVA model to evaluation the nutrient limitation patterns. N and Fe limit phytoplankton growth, according to evaluation results. Generally, Fe was considered as a promoting factor in phytoplankton growth in many researches, so N is the key factor that limits phytoplankton growth. The diatom as the dominate population, has a high N-demanded, and N-limitation open sea impacted obviously in the outer of the Bay. They co-determined the main limitation factor of the water.

关 键 词：大亚湾 加富实验 浮游植物 限制元素 

分 类 号：P734.44[天文地球—海洋化学]