胶州湾女姑山水域夏季赤潮高发期浮游植物群落结构特征  

Feature of Phytoplankton Community in the Nügushan Area of Jiaozhou Bay During the Red-Tide-Frequently-Occurring Summer Time

作　　者：张利永[1] 刘东艳[2] 孙军[1] 邹景忠[1] 

机构地区：[1]中国科学院海洋研究所海洋生态与环境科学重点实验室,山东青岛266071 [2]中国海洋大学海洋生命学院,山东青岛266003

出　　处：《中国海洋大学学报（自然科学版）》2004年第6期997-1002,共6页Periodical of Ocean University of China

基　　金：国家自然科学基金项目 (40 2 0 60 2 0 ;40 30 60 2 5 ;40 3760 4 0 ) ;国家重点基础研究发展规划项目 (2 0 0 1CB40 970 0 )资助

摘　　要：根据 1998年 5～ 8月夏季赤潮高发期间 ,胶州湾女姑山水域浮游植物群落结构的种群组成特征和演替变化对赤潮的发生和种群变动特点进行初步研究。结果表明 ,夏季女姑山水域的浮游植物主要由硅、甲藻组成 ,硅藻在细胞和物种丰度上都占优势。浮游植物优势种在调查期间出现明显的演替现象 ,水温的升高和营养条件的变化是引起物种演替的主要原因。浮游植物细胞丰度在夏季呈明显的增长趋势 ,从 5月份 6.3× 10 5个cell/m3 增至 8月份的 6.7× 10 6个cell/m3 ;其中 ,由于赤潮的爆发 ,细胞丰度的最高峰出现在 7月份 ,为 1.5× 10 7个 /m3 。在赤潮爆发期间 ,赤潮原因种高齿状藻和中肋骨条藻发生了明显的演替现象 ,不同细胞大小的优势种和营养条件的变化是发生物种演替的主要原因。叶绿素a的浓度和细胞丰度的变化共同反映了赤潮发生的全部过程。Based on the investigation data of phytoplankton in the Nügushan coastal waters of the Jiaozhou Bay from May to September in 1998, we studied the ecological characteristics of phytoplankton community and species succession. The results show that diatoms and dinoflagellates are dominant taxa in this area. An obviously succession appeares during the surveying, and the increase of temperature and nutrient is the main reason leading to the succession of phytoplankton species. The cell abundance of phytoplankton shows an increase during summer from 6.3×10 5 ind· cell/m 3 in May to 6.7×10 6 ind. cell/m 3 in August. The peak of cell abundance appeares in July due to the occurrence of the red tide, with a quick species sequence shift between Skeletonema costatum and Odontella regia. Cell size and nutrient ratios are the main reasons leading to the shift of red tide species. The variation of Chl a concentration and cell abundance can reflect the occurrence of red tides.

关 键 词：赤潮 浮游植物 优势种 演替 细胞丰度 胶州湾 

分 类 号：Q948.1[生物学—植物学]