Acta Agrestia Sinica

›› 2004, Vol. 12 ›› Issue (1): 3-7.DOI: 10.11733/j.issn.1007-0435.2004.01.002

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Influences of Flooding Disturbance on the Distribution Patterns of Three Grass Populations on the Songnen Steppe, Northeastern China

Wang Zheng-wen1,2, Zhu Ting-cheng2, Zang Chuan-lai3   

  1. 1. Key Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;
    2. Key Laboratory of Vegetation Science Education Department, Northeast Normal University, Changchun Jilin Province 130024, China;
    3. Erguna Rangeland Management Station, Erguna, Inner Mongolia Autonomous Region 022250, China
  • Received:2003-01-28 Revised:2003-05-08 Online:2004-02-15 Published:2004-02-15

水淹干扰对松嫩草原三种禾草种群分布格局的影响

王正文1,2, 祝廷成2, 臧传来3   

  1. 1. 中国科学院植物研究所植被数量生态学重点实验室, 北京, 100093;
    2. 东北师范大学植被科学教育部重点实验室, 长春, 130024;
    3. 内蒙古自治区额尔古纳市草原管理站, 额尔古纳, 022250
  • 通讯作者: 祝廷成
  • 作者简介:王正文(1969- ),男,山东人,汉族,博士后,主要从事植物种群生态及干扰生态学研究,已发表论文10余篇
  • 基金资助:
    国家重点基础研究发展规划项目(G2000019603);中国科学院知识创新工程重大项目(KSCX1-08)

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Abstract: To investigate the influence of 1998 flood on the distribution pattern of grass populations on Songnen Steppe in Northeastern China, we conducted a comparative study along the flooding gradient on the distribution patterns of three grass species: Aneurolepidium chinense, Puccinellia chinampoensis, and Echinochloa crusgali. The results are as follows: the three species populations, in spite of the flooding, remain in congregated distribution patterns. Flooding facilitates the horizontal interflow of the soil substances, and smoothes out the soil differentiations, thus lessening the distribution pattern intensities of P.chinampoensis and E.crusgali, which depend mainly on seeding to propagate and regenerate. Flooding disturbance influences remotely the distribution patterns (including pattern style,pattern intensity and pattern scale) of A.chinense populations, which mainly depends on the vegetative propagation of rhizomes to regenerate, though does affect the distribution pattern scales of P.chinampoensis and E.crusgali populations. Flooding disturbance alters the suitability and competitiveness of the plants by modifying the soil environments, thus affecting their population densities, and modifying their population distribution patterns.

Key words: Grassland science, Flooding, Disturbance, Distribution pattern, Grass, Songnen steppe

摘要： 为探明1998年水灾对松嫩草原禾本科植物种群分布格局的影响,对不同水淹干扰梯度上的羊草、碱茅和野稗种群进行了格局分析和对比研究。结果表明:三种禾草主要表现为集聚型分布,水淹干扰对同一物种种群的分布格局类型影响不显著;水淹干扰通过促进土壤物质的水平交流,降低了土壤异质性,从而减小了靠种子繁殖的禾草(如碱茅、野稗)种群的分布格局强度;水淹干扰对靠地下根茎扩繁种群的羊草的分布格局规模影响甚微,对靠种子繁殖种群的禾草的分布格局规模有一定程度的影响;洪水对种子等繁殖体的二次散布作用对种子的分布产生影响,使得后续生长的种群更加趋于随机分布。

关键词: 草原学, 水淹, 干扰, 分布格局, 禾草, 松嫩草原

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