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浙江南麂海域塔玛亚历山大藻种群动态及其与环境因子的关系

李扬1;吕颂辉1,2;江天久1,2;李欢1;萧云朴3;尤胜炮4   

  1. 1华南师范大学生命科学学院广东省高等学校生态与环境科学重点实验室, 广州 510631;2暨南大学理工学院赤潮与水环境研究中心, 广州 510632;3平阳县海洋与渔业局, 浙江平阳 325400;4浙江省南麂海洋环境监测站, 浙江平阳 325400
  • 收稿日期:2008-09-30 修回日期:1900-01-01 出版日期:2009-04-20 发布日期:2009-04-20

Population dynamics of Alexandrium tamarense and its relations with environmental factors in Nanji Islands sea area of Zhejiang Province.

LI Yang1;LÜ Song-hui1,2;JIANG Tian-jiu1,2;LI Huan1;XIAO Yun-pu3;YOU Sheng-pao4   

  1. 1Guangdong Higher Education Key Laboratory of Ecology and Environmental Science, College of Life Science, South China Normal University, Guangzhou 510631, China;2Research Center for Harmful Algae and Aquatic Environment, College of Science and Engineering, Jinan University, Guangzhou 510632, China;3Pingyang Oceanic and Fishery Bureau, Pingyang 325400, Zhejiang, China;4Nanji Marine Environmental Monitoring Station, Pingyang 325400, Zhejiang, China
  • Received:2008-09-30 Revised:1900-01-01 Online:2009-04-20 Published:2009-04-20

摘要: 基于2006年4月至2007年3月在浙江南麂海域的调查结果,对南麂海域塔玛亚历山大藻的种群动态及其与环境因子的关系进行了研究.结果表明:塔玛亚历山大藻在南麂海域仅出现在春季(4—6月);藻细胞密度在春季呈规则的单峰曲线,表层水体中藻细胞密度的最高值(12250 cells·L-1)出现在5月8日;塔玛亚历山大藻集中出现在水温18.5 ℃~19.5℃、盐度29.5‰~31.0‰的水体中;较高的藻细胞密度与较低的磷酸盐浓度相对应,氮盐浓度的变化与藻细胞密度之间没有明显的对应关系.逐步线性回归结果表明,塔玛亚历山大藻细胞密度与N∶P存在显著的正相关关系.

关键词: 冬小麦, 灌水, 氮, 产量, 水氮利用效率

Abstract: Based on the investigation in Nanji Islands sea area of Zhejiang Province from A pril 2006 to March 2007, the dynamics of Alexandrium tamarense and its relations with environmental factors were studied. In the study sea area, A. tamarense cells could only be found in spring (from April to June), and t he cell abundance was of single peak curve, with the highest (12250 cells·L -1) in surface water on 8th of May. Higher cell abundance of A. tamarense was found at the water temperature of 185 ℃〖KG-*4〗-〖KG-*7〗195 ℃, salin ity of 295‰〖KG-*4〗-〖KG-*7〗310‰, and lower PO4-P concentration, but no correlation was observed between A. tamarense cell abundance and water d issolved inorganic N concentration. Linear stepwise regression revealed that the re was a significant positive correlation between the cell abundance of A. tamarense and the ratio of water dissolved inorganic N to PO4-P.

Key words: winter wheat, watering, nitrogen, grain yield, water- and nitrogen use efficiency.