南麂列岛海域原甲藻种群动态及其环境影响因子分析  

DYNAMICS OF PROROCENTRUM POPULATION AND ITS RELATION WITH ENVIRONMENTAL FACTORS IN NANJI ISLANDS SEA AREA

作　　者：李扬[1] 吕颂辉[1,2] 江天久[1,2] 李欢[1] 萧云朴 尤胜炮 

机构地区：[1]华南师范大学生命科学学院,广东省植物发育生物工程重点实验室,广州510631 [2]暨南大学赤潮与水环境中心,广州510632 [3]浙江省平阳县海洋与渔业局,平阳325400 [4]浙江省南麂海洋环境监测站,平阳325400

出　　处：《水生生物学报》2009年第2期236-245,共10页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金项目30700046;国家自然科学基金重点项目U0733006;国家重点基础研究发展规划项目2001CB409709;广东省自然科学基金7300190;温州市科技计划项目S2006A007资助

摘　　要：研究了2006年4月至2007年3月之间,南麂海域原甲藻种群的种类组成、季节动态、空间分布及其与水温、盐度、氮磷营养盐等环境因子的关系。原甲藻种类有三角棘原甲藻、东海原甲藻、海洋原甲藻和反曲原甲藻,前两者是南麂海域最为优势的种类,它们的分布季节集中在春季(4—6月),并先后于5月12日和5月25日形成赤潮。原甲藻细胞数量在表层水体中的数量显著高于底层,这与原甲藻种类能够自主运动,具有明显的昼夜垂直移动特性有关。三角棘原甲藻较高细胞数量相对集中出现在水温为18.5—19.5℃,盐度为29.58‰—30.95‰的水体中;东海原甲藻较高细胞数量则相对集中出现在水温为18.5—21.3℃,盐度为29.03‰—30.92‰的水体中。氮盐和磷酸盐浓度与原甲藻细胞数量之间呈负相关,磷营养盐浓度的高低对原甲藻种群动态影响更甚。对原甲藻细胞数量和环境因子之间进行相关性分析,发现原甲藻细胞数量与N:P值之间存在显著的正相关性,并与磷酸盐浓度之间存在显著的负相关性。原甲藻细胞具有较强储备氮磷营养物质能力的生物学特性使其能够在低营养条件下取得生长竞争的优势。Prorocentrum is a kind of very common dinoflagellate species in China coastal waters,and P. donghaiense Lu is the most key bloom causative species in East China Sea in recent years. Better understanding and analysis about the dynamics of Prorocentrum population in Nanji Islands Sea Area may support many useful data and provide helpful guides for the ecological studies and protection of Nanji Islands National Nature Reserve. A series of water samples were collected from four stations in Nanji Islands National Nature Reserve from April 2006 to March 2007. During this investigation period, monthly samples were gathered from July 2006 to March 2007, which including and corresponding the summer, autumn and winter periods. And in the spring, from April to June, 2006,in which period the Prorocentrum blooms occurred frequently in recent several years,water samples were collected nearly every week. Both surface and bottom samples were got respectively. Species composition, seasonal variations and vertical distribution of Prorocentrum population as well as several chemical parameters were investigated. And the connections between Prorocentrum dynamics and several environmental factors, such as water temperature, salinity, nitrogen and phosphorus nutrition concentration, were analyzed. Totally, four Prorocentrum species have been found,P, triestinum Schiller,P. donghaiense Lu,P. micans Ehrenberg and P. sigmoides Bohm,in which,P, triestinum and P. donghaiense were the dominant species of phytoplankton, especially in spring and induced blooms in 12 May and 25 May respectively. During Prorocentrum blooms periods,Prorocentrum cell abundances distributing in the surface water levels were much higher than that in the bottom water levels. It was the result that Prorocentrum cells had the ability to move anywhere through their flagella swinging. So they could shift their vertical distribution based on different times in a day,moving to and distributing near the upper water levels in the daylight for better sunshine and removing to

关 键 词：原甲藻 种群动态 环境因子 南麂列岛海洋自然保护区 

分 类 号：Q145.1[生物学—生态学]