还原态氮源在微小原甲藻大规模赤潮中的重要性——动力学模型

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Abstract

In the late spring and early summer of 1998, an extensive Prorocentrum minimum bloom developed in the Choptank River of Chesapeake Bay, USA. A series experiments were conducted to determine the physiological characteristics of P. minimum in relation to its bloom development. These physiological characteristics in term of nitrogen uptake were applied toward the development of a simulation model of P. minimum bloom dynamics. Several scenarios were tested with this model to demonstrate the importance of some key ecological and physiological processes in the development and maintenance of P. minimum blooms. Model results suggested an initial pulse of sufficient nitrogen from river flow was essential for the bloom initiation, but the composition of this initial nutrient delivery was not significant in bloom initiation. However, the bloom was sustained by reduced nitrogen sources after its establishment. The physiological preference for reduced nitrogen uptake by P. minimum therefore plays an importance role in bloom maintenance, with reduced nitrogen representing more than 90% of total nitrogen uptake in the bloom peak period. The model further suggested that the ability of P. minimum to maintain a significant uptake of nitrogen under low light or dark conditions would be advantageous in its bloom development.

Key words： Harmful algal bloom Nitrogen uptake P. minimum Model

Received: 25 June 2003

Q949.244.5

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	Articles by authors
	FAN C.
	Glibert P. M.

Cite this article:

FAN C.,Glibert P. M.. The importance of reduced nitrogen in a natural Prorocentrum minimum bloom-a model approach[J]. , 2003, 22(3): 199-204.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2003/V22/I3/199

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