Distribution of heavy metals in Sediments from Zhangjiang Estuary mangrove area and ecophysiological effect of arsenic stress on Aegiceras corniculatum seedlings
根据福建云霄红树林自然保护区的自然地理特征，选择10个样地采集表层沉积物样品，同时采集柱状样品。通过测定沉积物样品中Cu、Zn、Cr、As的含量、分布和形态特征，分析Cu、Zn、Cr、As在红树林沉积物中的时空分布规律和形态转化机理。根据野外研究的结果采用砂基栽培，研究红树植物桐花树（Aegicerascorniculatum）在不同As浓度梯度系列和不同暴污处理时间下幼苗的萌发生长及生理生态效应的影响。设置As胁迫浓度系列为0.5、1、2.5、5、15、45、100mg/L，以不加As为对照，培养基海水盐度均为10‰，培养期为90天。按期记录幼苗的高度生长、幼苗各组分生物生长量，测定叶绿素、...Samples of surficial sediments and vertical profile were collected from Zhangjiang Estuary mangrove wetland (Yunxiao, Fujian) in October 2004. Concentration and speciation of Cu, Zn, Cr and As were examined. The distribution, possible sources and affect factors of Cu, Zn, Cr and As were discussed in this paper. Mangrove Aegiceras corniculatum hypocotyls were cultivated in sand and treated with 10‰...学位：理学硕士院系专业：生命科学学院生物学系_植物学学号：S20032600
