作　　者： ; ; ;

机构地区： 温州医学院环境与公共卫生学院

出　　处： 《生态学报》 2008年第2期559-569,共11页

摘　　要： 于2004年5月至2005年2月对粤东大规模养殖区柘林湾的根管藻(Rhizosolenia)种群的时空分布进行了季节性调查。调查期间,共发现根管藻16种(含变种、变型),其中柔弱根管藻(R.delicatula),脆根管藻(R.fragilissima),刚毛根管藻(R.setigera)和笔尖根管藻粗径变种(R.styliformisvar.latissima)均为全年出现种。柘林湾根管藻种类丰富度和群落密度的季节变化均呈现高温季节高低温季节低的特点,而平面分布均表现出由湾内向湾外递增的趋势。整体而言,柘林湾是一个根管藻种类数很高而群落密度处于中等水平的海湾。分析表明,水温是影响柘林湾根管藻种类丰富度和群落密度季节变化的关键因素,而光照、种间竞争和浮游动物群落结构的组成是影响其时空分布的主要因素。 Zhelin bay is characterized by intensive aquaculture along the coast of Southeast China, where approximately half of the water area are occupied by either cultured oysters or caged-fish farms. As one of the most important bays for largescale mariculture in Guangdong Province, aquaculture production in Zhelin Bay has made significant contributions to the local economy. However, development of intensified caged-fish farms during the last decade has accelerated eutrophication process of the bay, and massive fish kills due to harmful algal blooms such as Phaeocystis pouchetii were reported in 1997 and 1999. Diatom blooms such as Skeletonema costatum and Thalassiosira diporocyclus have also been reported in recent years. Since May 2000, our research group has initiated an ecological investigation around Zhelin Bay, where samples were collected monthly or quarterly for analysis of phytoplankton, zooplankton, microorganism, water temperature, salinity, nutrients and other environmental parameters. In the present study, we described the seasonal dynamics of Rhizosolenia community in 9 sampling stations from May 2004 to February 2005. Samples were collected at high tide （ ± 1.5 h） quarterly during the investigation. For quantitative phytoplankton analysis, one liter of water samples were collected with 5-L HQM-1 sampling bottles 0.5 m under the surface and 0.5 m above the bottom at each station. Immediately after sampling, the samples were fixed with Lugol＇s iodine solution with a final concentration of 15‰ and then transferred to graduated glass cylinders and concentrated to 30 - 100 ml gradually through sedimentation for a period of 3 days. Species identification and density counting was performed with inverted microscope （ Zeiss Axiovert25, magnification 400 × ） using a 1-ml Sedgewick-Rafte counting frame, and a minimum of 400 ceils were counted for each sample. Water temperature, salinity, turbidity, pH value, dissolved oxygen （DO） and water depth were determined in situ with a portable water quali

关 键 词： 柘林湾 根管藻 种群动力学

领　　域： [生物学] [生物学]