东、黄海沉积物中叶绿素的分析  

An Analysis of Chlorophyll in the Sediments of East China Sea and Yellow Sea

作　　者：李肖娜[1] 刘素美[1] 吕瑞华[2] 张经[1] 邹立[1] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266003 [2]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《中国海洋大学学报（自然科学版）》2004年第4期603-610,共8页Periodical of Ocean University of China

基　　金：国家重点基础研究发展规划项目 (G1 9990 4 370 5 ) ;国家自然科学重点基金 (4 0 0 36 0 1 0 )资助

摘　　要：研究了 2 0 0 0年 1 0月和 2 0 0 1年 5月东、黄海航次所采集的沉积物中叶绿素 a及其降解产物脱镁叶绿酸的含量与分布 ,比较了沉积物样品在不同氧化还原条件下培养后的叶绿素 a含量的变化。结果表明 ,整个东、黄海表层沉积物中叶绿素 a的含量是以长江口附近的 E4站含量最高 ,1 0月份为 2 .4 8μg/ g,5月份为 3.0 1μg/ g;对各站位 ,随深度增加叶绿素 a和脱镁叶绿酸的含量呈递减趋势 ,到一定深度含量不再变化 ;个别站位叶绿素 a和脱镁叶绿酸的含量在随深度增加而降低的过程中产生了小的突跃 ,可能是由于生物扰动和环境变化引起的 ;脱镁叶绿酸作为叶绿素 a的主要降解产物随深度增加成为叶绿素存在的主要形式 ;充空气和氮气培养均能增加表层沉积物中叶绿素 a的含量 ;比较了 2 0 0 0年 1 0月份沉积物中叶绿素 a与上层水柱中叶绿素 a的相对含量 ,就 5个站位的平均值而言 ,沉积物中的叶绿素占上层水柱中叶绿素的 36 .9% ,而长江口附近的 E4站沉积物中叶绿素的相对含量为 1 1 1 .1 % 。The content and distribution of chlorophyll a (chl a) and phaeopigments (pha a) in the sediments of the East China Sea and the Yellow Sea were investigated in October, 2000, and May, 2001. The content of chlorophyll a in the surface sediment layer was also analyzed after incubation under different redox conditions. The results show that the highest chlorophyll a in the surface sediment layer(0～1cm) of this region appears at station E4. The concentration of chlorophyll a in the surface sediment is 2.48μg/g in October and 3.01μg/g in May, respectively. Both chlorophyll a and phaeopigments decreases remarkably with depth, and are stable at a certain depth. There are several observed leaps in the vertical distribution of chlorophyll a and phaeopigments at some stations,it may be caused by biodisturbance and the environments changes. As the main degradation product of chlorophyll a, phaeopigments become the main type with the increase of depth. After incubation under nitrogen and oxygen conditions,the concentration of surface chlorophyll increases. Here we compare the total content of chlorophyll a in the sediments and in the water column. On the average of the 5 studied stations of the October cruise, the total chlorophyll a in the sediment accounts for 36.9% of the total chlorophyll a in the water column. But at E4, it is colse to that at the Changjiang River Estuary, and its ratio is as high as 111.1% , This part of chlorophyll a should not be ignored.

关 键 词：海洋沉积 叶绿素A 黄海 东海 脱镁叶绿酸 

分 类 号：P736.41[天文地球—海洋地质]