长江口初级生产者物质输运及其与环境因子的关系

IOCAS-IR > 海洋环流与波动重点实验室

	长江口初级生产者物质输运及其与环境因子的关系
	林峰竹
学位类型	博士
	2007-06-14
学位授予单位	中国科学院海洋研究所
学位授予地点	海洋研究所
关键词	浮游植物群落结构物质输运环境因子长江口
摘要	根据历史调查资料，运用聚类分析(Cluster)、多维标度分析(MDS)、典范对应分析(CCA)、冗余分析（RDA）等多元统计学方法，探讨了长江口群落结构变异、初级生产力水平变化的主要影响因素。结果表明，与八十年代相比，长江口生态与环境发生了显著改变，环境因子的改变直接影响长江口浮游植物的群落结构，并且各季节长江口浮游植物群落结构变异的驱动因素不同。季节间浮游植物群落结构变异的主要影响因子为温度、盐度、透明度、营养盐，其中温度始终是首要的影响因子，同一季节之间（春、秋季），浮游植物群落结构时空变异的主要影响因素为营养盐，不同的浮游植物类群对环境因子的响应机制不同。运用细胞体积转换法计算浮游植物细胞碳含量，估计了长江口浮游植物群落对生源要素碳的贡献量，并分析了浮游植物群落碳含量与长江口理化环境因子的相关关系。结果显示，盐度、透明度、营养盐（氮和磷）是制约长江口浮游植物碳含量分布的主要因子。通过室内实验，探讨了长江口浮游植物绝对优势种—中肋骨条藻物质输运能力与环境因子的关系，建立了其生长速率、单位细胞叶绿素a的含量、颗粒有机碳的含量与环境因子之间的关系模型。分析结果显示温度、盐度、光照强度对中肋骨条藻的生长速率、细胞内叶绿素a和颗粒有机碳的含量均有显著的交互作用。
其他摘要	Based on the historical investigating data in the Changjiang Estuary, the relationships between phytoplankton community construction, primary production and environmental factors were analyzed, using multi-dimensional statistical analysis methods such as Cluster, MDS, CCA, RDA et al. The results showed the seasonal variation of phytoplankton community structure was mainly caused temperature, salinity, transparence and nutrients, and temperature was principal factor. The nutrients were the most important factors which resulted in the temporal variation of the phytoplankton community construction between the same seasons. Different types of phytoplankton species had different ways in responding to the environment variables. The amount of particulate organic carbon in phytoplankton cells was measured using transformed form of cell volume, and the connection between phytoplankton carbon production and the environmental condition was discussed in the Changjiang Estuary. The results showed salinity, transparence and nutrients (nitrogen and phosphorus) were the essential factors that restricted the distribution of phytoplankton carbon content in the Changjiang Estuary. The capability transforming matter of the predominant taxon Skeletonema costatum was examined in laboratory, and the relationship models between growth rate, chlorophyll-a and particulate organic carbon content and environmental variables were obtained. The analysis results showed that temperature, salinity and light intensity had the significant interactions in the growth rate, content of chlorophyll-a and particulate organic carbon.
页数	82
语种	中文
文献类型	学位论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/1291
专题	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	林峰竹. 长江口初级生产者物质输运及其与环境因子的关系[D]. 海洋研究所. 中国科学院海洋研究所,2007.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
10001_20042800681205（2285KB）			限制开放	--	浏览