黄河三角洲南部潮间带沉积环境对底栖叶绿素a分布特征的影响  

Effects of sediment environment on distribution pattern of benthic chlorophyll-a in southern intertidal area of Yellow River Delta

作　　者：姚晓[1] 山口一岩[2] 邹立[1,3] 高会旺[1,3] 郭新宇[2] 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]日本爱媛大学海洋环境研究中心,日本松山7908577 [3]海洋环境与生态教育部重点实验室,山东青岛266100

出　　处：《生态学杂志》2010年第9期1762-1769,共8页Chinese Journal of Ecology

基　　金：国家自然科学基金委对外合作与交流资助项目(40711140114)

摘　　要：2007年9月、2008年4月和2008年7月,在东营黄河三角洲南部潮间带进行了表层沉积物叶绿素a含量和粒径组成调查。结果表明:1)近岸区域叶绿素a含量由北向南逐渐增高,秋季和夏季叶绿素a含量分别为0.426～4.749μg.g-1(平均值为1.591μg.g-1)和0.307～5.195μg.g-1(平均值为1.832μg.g-1),由潮上线到潮下线呈下降趋势;春季叶绿素a含量为0.623～8.734μg.g-1(平均值为2.542μg.g-1),由潮上线到潮下线呈上升趋势;2)沉积物类型较为单一,由粉砂、砂质粉砂和粉砂质砂组成,中值粒径变化范围为0.025～0.081mm(平均中值粒径为0.045mm),由潮上线到潮下线逐渐增大;3)2007年9月叶绿素a分布主要受沉积物粒度的影响,与细颗粒物质含量、中值粒径的大小及各粒径沉积物含量极显著性相关(P<0.01);2007年9月与2008年7月叶绿素a含量与细颗粒物质含量呈正比关系,在砂质底质中含量较低,在粘土质底质中含量较高;4)底栖叶绿素a与高程呈负相关,表明松软、平整、稳定的沉积物表面有利于底栖微型藻类的生长和繁衍。In September 2007 and in April and July 2008,sediment samples were collected from the southern intertidal area of Yellow River Delta to study the distribution pattern of benthic chlorophyll-a （Chl-a） content and its relations to sediment grain size. In study area,the Chl-a content increased from the north to the south. In the spring,the Chl-a content ranged from 0.623-8.734 μg·g-1 with an average of 2.542 μg·g-1 and increased from high tide zone to low tide zone; while in summer and autumn,the Chl-a content ranged from 0.307-5.195 μg·g-1 （averaging 1.832 μg·g-1） and 0.426-4.749 μg·g-1 （averaging 1.591 μg·g-1）,respectively,and decreased from high tide zone to low tide zone. The sediments were unanimously composed of silt,with the median size ranging from 0.025-0.081 mm （averaging 0.045 mm） and increased from high tide zone to low tide zone. The distribution pattern of benthic Chl-a was primarily affected by the grain size of sediment,and had significant correlation with the content of fine particles. There was a negative relationship between benthic Chl-a content and elevation height,suggesting that soft,flat,and stable sediment could benefit the growth and reproduction of benthic micro-algae.

关 键 词：潮间带 叶绿素A 沉积物 粒度 

分 类 号：Q948.8[生物学—植物学]