松嫩草原主要草本植物种间关系及其对水淹干扰的响应  

Responses of interspecific relationships among main herbaceous plants to flooding disturbance in Songnen Plain,Northeastern China

作　　者：王正文[1] 祝廷成[2] 

机构地区：[1]中国科学院植物研究所植被数量生态学开放研究实验室,北京100093 [2]东北师范大学草地研究所,长春130024

出　　处：《应用生态学报》2003年第6期892-896,共5页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划项目 (G2 0 0 0 0 1860 3 );中国科学院知识创新工程重大资助项目 (KSCX1 0 8)

摘　　要：为弄清草地植物种间关系对水淹干扰的响应 ,在松嫩平原羊草 (Leymuschinensis)草地 1998年部分遭受水淹的吉林省大安市三家甸子草场内 ,设置了经历不同水淹强度或水淹时间的样带 ,并通过种间关联分析及种间协变的秩相关分析对这些样带上植物的种间关系进行了比较研究 .结果表明 ,水淹干扰对大多数植物种对的关联类型影响不显著 ,对种间协变的秩相关系数却有一定程度影响 ,而且不同种对之间的协变关系对水淹干扰的响应有较大差异 ,说明植物种间协变关系既受环境波动和干扰因子的影响 ,也取决于组成种对的植物种的生物生态学特性 ,其中主要是对土壤水分状况反应的差异 .To investigate the effects of flooding disturbance on the interspecific relationships among grassland plant species, a comparatively thorough study was conducted on Sanjiadian National Rangeland in the territory of Da'an city, Jilin Province, which was partly flooded in 1998. The study site was located in the south of Songnen plain, Northeastern China, dominated by Leymus chinensis grassland. Along the flooding gradients (from un flooded to heavily flooded) formed on an extensive mild slope taken as the test site, four flooded transects coded T 1, T 2, T 3 and T 4 respectively,but subjected to the flood of different durations were designed, and also an un flooded one coded T 0 was set as a control at relatively higher elevation. Before flooding occurred in 1998, the slope had almost uniform soil and L.chinensis dominated vegetation. Contingency table was used to calculate the interspecific association indice,while Spearman rank correlation coefficient was adopted to analyze the interspecific covariance. The results showed that flooding disturbance had little effect on the association type for most species pairs, but had some effect on the rank coefficients of inter specific co variation. Different species pairs varied greatly in their responses to the flooding disturbance, suggesting that the inter specific co varying relations were not only dependent on environmental perturbation or disturbance factors, but also on (probably to a larger extent) the biological & ecological properties of the species that comprised the species pairs. The interspecific association types that could be determined between Potentilla paradoxa and all the other plant species were always positive,and little affected by flooding disturbance. As a main companion species, P.paradoxa had a broad ecological breadth, and weak selectivity for habitat. Contrarily, the interspecific association types that could be determined between Phragmites australis and others plant species (in addition to Scirpus planiculmis )

关 键 词：水淹 干扰 种间关系 关联 协变 松嫩草原 

分 类 号：Q948.118[生物学—植物学] Q948.12