历史因素对克隆植物在异质环境中分布的影响  

Effect of history on clonal plant ramets distribution in a heterogeneous environment

作　　者：李良[1] 王刚[2] 

机构地区：[1]甘肃农业大学资源与环境学院,甘肃兰州730070 [2]兰州大学干旱与草地生态教育部重点实验室,甘肃兰州730000

出　　处：《兰州大学学报（自然科学版）》2008年第3期43-47,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金(30770360)资助．

摘　　要：在异质环境中将动物的理想自由分布理论(IFD)与克隆植物分株分布相结合,不仅考虑基株竞争能力的差异,还考虑分株进入斑块后本身不能自由移动的特点,运用迭代的方法,计算分株最终的分布结果.结果表明:历史因素使分株的分布依赖于斑块中的初始分株数,所以低匹配和过匹配都会出现.斑块质量越相似,分株偏离IFD越明显.竞争能力强的基株分株分布偏离IFD的程度较小,分株总数的分布比竞争权重的分布更接近IFD.In a heterogeneous environment we combined the ideal free distribution theory （IFD） of animals with the distribution of a clonal plant＇s ramets. The plant individuals differed in their competitive ability. The ramets could not move from the patch freely and this was due to the historical effect. The distribution of ramets was obtained under these conditions and the results show that the initial ramet number of a patch determine the final number in all cases. Both over-matching and under-matching can occur. When the patche quantity is getting similar to the ramet the distribution is deviating from IFD gradually. A strong competitor has a dominating position in the system and its distribution is close to IFD. The distribution of ramet number is closer to IFD than the distribution of the competitive weight.

关 键 词：克隆植物 理想自由分布 异质环境 历史因素 

分 类 号：Q945.51[生物学—植物学]