生物多样性 ›› 2007, Vol. 15 ›› Issue (1): 23-30.doi: 10.1360/biodiv.060114

• 论文 • 上一篇    下一篇

海南岛以南海域浮游植物群落特征研究

戴明, 李纯厚, 张汉华, 贾晓平   

  1. (中国水产科学研究院南海水产研究所, 农业部渔业生态环境重点开放实验室, 广州 510300)
  • 收稿日期:2006-06-06 修回日期:2006-11-16 出版日期:2007-01-20
  • 通讯作者: 贾晓平

Characteristics of the phytoplankton community in the southern waters of Hainan Island

Ming Dai, Chunhou Li, Hanhua Zhang, Xiaoping Jia   

  1. Key and Open Laboratory of Fishery Ecology and Environment, Ministry of Agriculture, South China Sea Fisheries Re-search Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300
  • Received:2006-06-06 Revised:2006-11-16 Online:2007-01-20
  • Contact: Xiaoping Jia

为掌握海南岛以南海域浮游植物群落特征, 1998–1999年对其进行了4个航次的现场调查。经显微镜检, 共鉴定出浮游植物290种(包括23个变种和5个变型)。在此基础上, 作者通过统计和聚类分析方法, 研究了这一区域浮游植物的物种组成、丰度变动和群落结构等特征。结果显示, 海南岛以南海域浮游植物物种丰富, 以硅藻门和甲藻门为主; 物种组成的时空差异显著。其优势种的暖水性、高盐性或广盐性特征明显。冷季以广温种小舟形藻(Navicula subminuscula)占优势, 随气温回升, 暖水性种类优势地位突出。不同季节浮游植物丰度差异小, 以硅藻门丰度占优势, 但与冷季相比, 暖季中甲藻门和蓝藻门丰度明显上升。4月和9月的高丰度中心位于西部海域北部湾湾口附近, 1月和12月则出现在中东部水域。聚类结果显示各浮游植物群落组分无明显的斑块分布特征。群落物种多样性表现为4月和9月高于1月和12月; 群落稳定性以12月份为最差; 中南部水域群落稳定性较差。总之, 海南岛以南海域浮游植物群落具独特的热带开阔海域生物区系特征。冷暖季群落特征有明显差异。海域水文条件对群落特征的影响复杂。

The phytoplankton community in the southern waters of Hainan Island was characterized based on four cruise surveys carried out in 1998 and 1999. A total of 290 species (including 23 varieties and 5 forms) were identified by microscope, and species composition, richness and community structure were analyzed using statistical and clustering methods. The results showed that phytoplankton species were abundant in the study area, and were mainly composed of diatoms and dinoflagellates. The species composition showed a significant spatio-temporal variation. In general, the dominant species were characterized by warm water and halophilous or euryhalinous affinities. In the cool seasons, Navicula subminuscula, a eurythermal species, was the major dominant species, while warm water species in-creased rapidly with increasing air temperature. Phytoplankton richness showed no remarkable seasonal variations, and diatoms were the most abundant group throughout the year. However, the richness of dinoflagellate and blue-green algae increased significantly in warm seasons. The center of phytoplank-ton richness occurred in the western waters around the mouth of the Beibu Bay in April and September, and then shifted to the middle-eastern waters in December and January. A clustering diagram indicated that the phytoplankton community had no obvious block distribution. The diversity index of the phyto-plankton community was relatively low in December, at which time the community was unstable in middle-southern waters. In conclusion, this phytoplankton community comprised a unique tropical open sea biota, showing significant seasonal variation, and influenced by hydrologic features.

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