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

Chinese Journal of Applied Ecology

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

LI Yang¹;LÜ Song-hui^1,2;JIANG Tian-jiu^1,2;LI Huan¹;XIAO Yun-pu³;YOU Sheng-pao⁴

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

Abstract

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.

LI Yang¹;LÜ Song-hui^1,2;JIANG Tian-jiu^1,2;LI Huan¹;XIAO Yun-pu³;YOU Sheng-pao⁴. Population dynamics of Alexandrium tamarense and its relations with environmental factors in Nanji Islands sea area of Zhejiang Province.[J]. Chinese Journal of Applied Ecology.

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

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