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松嫩平原不同盐渍土条件下蓝藻群落的生态分布

张巍;冯玉杰   

  1. 哈尔滨工业大学城市水资源与水环境国家重点实验室, 哈尔滨 150090
  • 收稿日期:2007-08-05 修回日期:1900-01-01 出版日期:2008-05-10 发布日期:2008-05-10

Ecological distribution of Cyanophyta communities on saline-alkaline soils in Songnen Plain.

ZHANG Wei; FENG Yu-jie   

  1. State Key Laboratory of Urban Water Resource & Environment, Harbin Institute of Technology, Harbin 150090, China
  • Received:2007-08-05 Revised:1900-01-01 Online:2008-05-10 Published:2008-05-10

摘要: 以松嫩平原典型的不同程度盐碱化草地为研究对象,测定了其土壤的电导率、离子组成、有机碳等,分析了3种类型盐碱土上的固氮蓝藻群落。结果表明:3种类型土壤的理化特征和蓝藻群落各有其特点,固氮蓝藻有7个属,其中以丝状种类占优势;蓝藻在不同类型盐碱土上分布略有差异,在中度盐碱土种类最为丰富;不同种类的蓝藻对生境的选择性不同;松嫩平原草地是个脆弱的生态系统,其土壤理化特性及藻类分布较特殊。因此,必须加强保护和管理。

关键词: 石榴园, 节肢动物群落, 动态

Abstract: With three typical saline-alkaline grassland soils in Songnen Plain as test objects, this paper measured their electrical conductivity, iron composition, and organic carbon, and compared the nitrogenfixing Cyanophyta comunities on the soils. The results showed that the physicochemical propertie of test soils and the Cyanophyta communities had their own characteristics. There were seven genera of nitrogen-fixing Cyanophyta, with filamentous cyanobacterium as the dominant. The Cyanophyta had a slightly different distribution on the three saline-alkaline soils, with the richest species on moderate saline-alkaline soil, and different species had different selection of habitats. Songnen Plain is a kind of fragile ecosystem, and its soil physicochemical characteristics and algal distribution are relatively special. Therefore, its ecoprotection and management should be enhanced.

Key words: Megranate orchard, Arthropod community, Dynamics