一座南亚热带小型贫营养水库浮游植物群落结构及季节变化

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Abstract

Due to the difference in water volume,seasonal dynamics and structure of the phytoplankton community in small reservoirs are distinct from those in large reservoirs.To understand the composition and dynamics of the phytoplankton community in small reservoirs,we investigated a typical small oligotrophic reservoir located in southern China,Gida Reservoirs,in April,August and December,2006.The concentrations of TN,TP were low in this reservoir.32 taxa of phytoplankton were,in total,identified from 3 samplings.The abundance of phytoplankton ranged from 69 to 342cells·mL^-1,and the biomass of phytoplankton ranged from 1.34 mg·L^-1 to 3.69 mg·L^-1.Cells abundance and biomass of phytoplankton in the summer were higher than in winter and spring.Peridinium sp.was the first dominant group of biomass and abundance in the phytoplankton community.In the summer,the abundance of Cryptomonas sp.and Cosmarium spp.increased and became the dominant species.In the winter,phytoplankton abundance and biomass decreased significantly.Cryptomonas sp.was out of the samples,and Aulacoseira granulate,following Peridinium sp.,became one of the dominant species.As a small reservoir with a small catchments,the thermal structure is stable for a whole year,and rainfall functions the main source of nutrients.The thermal stability favors Peridinium to be the dominant species,and precipitation is the principle driving force for the seasonal dynamics of the phytoplankton community.

Key words： phytoplankton community seasonal dynamics small reservoir

Received: 25 August 2008

Q178.51

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	Articles by authors
	LIU Lei
	XIAO Li-juan
	HAN Bo-ping

Cite this article:

LIU Lei,XIAO Li-juan,HAN Bo-ping. Dynamics and structure of the phytoplankton community of a small oligotrophic reservoir in southern China[J]. , 2008, 27(4): 217-221.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2008/V27/I4/217

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