胶州湾浮游植物营养盐结构的初步研究

IOCAS-IR > 海洋环流与波动重点实验室

	胶州湾浮游植物营养盐结构的初步研究
其他题名	Research on Phytoplankton Nutrient Structure in Jiaozhou Bay
	潘胜军
学位类型	博士
	2009-05-21
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	营养盐结构叶绿素a 粒级组成浮游植物胶州湾
摘要	目前在尚不能测定天然海水中浮游植物营养盐含量及组分的情况下，通过室内培养，测定浮游植物细胞中营养盐含量及其组分，探讨天然海水中浮游植物营养盐结构特征。本论文通过对不同大小浮游植物主要优势种的C、N、P、Si含量及组成的测定，结合现场调查海水营养盐、粒级叶绿素a数据及历史资料，探讨了不同水域、不同大小、不同季节浮游植物培养后营养盐结构的差异，主要结论如下：胶州湾表层营养盐与叶绿素a浓度平面分布一致，呈现自西北、东北部向中、南部及湾外递减的趋势。与粒级叶绿素a季节变化相反，表层营养盐浓度春、秋季较高，冬、夏季较低。自营养盐丰富的长江口水域取得的藻种，培养后细胞中除N含量接近外，C、P、Si含量高于胶州湾，Si含量的差异尤为明显。胶州湾不同大小浮游植物细胞中C、N、P、Si的含量一般随粒级的增大而增加，C、N、P在细胞中所占比例亦是如此，但Si所占比例基本一致；粒级较小的中肋骨条藻更容易吸收Si，而粒级较大的旋链角毛藻和诺氏海链藻更容易吸收N和P。与海水营养盐浓度类似，培养后浮游植物C、N、P、Si的含量及干质量浓度亦表现出季节差异；冬季中肋骨条藻培养后细胞中C、N、P、Si的含量较高，春季较低。室内培养浮游植物N/P、C/N比值与颗粒物接近，Si/P、Si/N比值小于颗粒物。培养后胶州湾浮游植物细胞高C、N含量，低P、Si含量和高N/P比（远高于16），低Si/P比、Si/N比（远低于16，1），与海水和颗粒物中营养盐结构基本相似，说明Si可能是胶州湾浮游植物生长潜在的限制因子。
其他摘要	When we can’t determinate phytoplankton nutrient content and its composition in natural seawater now, measuring lab-cultured phytoplankton nutrient content and its composition can reflect characteristic of natural phytoplankton nutrient structure to some degree. C, N, P, Si content and composition of different sized phytoplankton dominant species were measured in this paper, then comparing with spot investigation seawater nutrient, different size chlorophyll.a concentration and historical studies, we explored the difference in different sea area, different size, different season phytoplankton nutrient content and its structure. The main conclusions are as follows: Horizontal distribution of layer nutrient concentration is similar to chlorophyll.a concentration in Jiaozhou Bay, which gradually decrease from northwest, eastwest bay to middle, south and out of the bay. Opposition to seasonal variation of chlorophyll.a concentration, nutrient concentration are higher in spring, autumn and lower in winter and summer. Except N content close, C、P、Si content of cultured Sk. Costatum from higher nutrients’ Changjiang Estuary is higher than those of Jiaozhou Bay, especially in Si. C, N, P, Si contents in cell of different sized phytoplankton in Jiaozhou Bay increases along with the size increasing, which is the same to the proportion of C, N, and P content in cell, while the percent of Si are small differences among different sized phytoplankton. While the smaller size of Sk. Costatum is apt to absorb Si, the larger size of Ch. curvisetus and Th. nordenskioldi are inclined to absorb N and P. Similar to seawater nutrient concentration, C, N, P, Si content and the dry quality concentrations display the seasonal difference. C, N, P, Si content and the dry quality concentrations of cultured Sk. Costatum in winter are higher, while lower in spring. The ratios of lab-cultured phytoplankton N/P, C/N are closed to suspended particulates, when those of Si/P, Si/N are lower than suspended particulates. Similar to seawater and particulates nutrient structure in Jiaozhou Bay, high contents of C, N and relative low P, Si, high N/P ratios and low Si/P and Si/N ratios in lab-culture phytoplankton, showed that Si was possibly potential influence on phytoplankton growth.
页数	62
语种	中文
文献类型	学位论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/653
专题	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	潘胜军. 胶州湾浮游植物营养盐结构的初步研究[D]. 海洋研究所. 中国科学院海洋研究所,2009.

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