洮河上游紫果云杉群落主要乔木生态位、种间关系及群落稳定性  

Interspecific association, niche and community stability of the main tree species in Picea purpurea community in upstream of Taohe river

作　　者：李波 赵阳 曹家豪 齐瑞 高本强 尉文 刘婷 王飞 冯宜明 LI Bo;ZHAO Yang;CAO Jiahao;QI Rui;GAO Benqiang;YU Wen;LIU Ting;WANG Fei;FENG Yiming(Institute of Forestry Science of Bailongjiang in Gansu Province,Lanzhou 730046,Gansu,China;Gansu Bailongjiang Forest Ecosystem Research Station,Zhouqu 746300,Gansu,China;Hexi University,Zhangye 734000,Gansu,China)

机构地区：[1]甘肃省白龙江林业科学研究所,甘肃兰州730046 [2]甘肃白龙江森林生态系统定位观测研究站,甘肃舟曲746300 [3]河西学院,甘肃张掖734000

出　　处：《中南林业科技大学学报》2024年第11期70-77,共8页Journal of Central South University of Forestry & Technology

基　　金：甘肃省科技支撑计划项目(23YFFA0023);甘肃省自然科学基金项目(22JR5RA771);甘肃省林草科技项目(KJCX202202,2023kj36);河西学院博士科研启动基金项目(KYQD2020003)。

摘　　要：【目的】研究群落中主要物种的生态位、种间联结以及群落稳定性,能够了解群落内物种对资源的利用习性,掌握群落结构和群落稳定性,对森林可持续经营以及退化森林的恢复和重建具有重要的意义。【方法】本研究以洮河上游紫果云杉天然林群落为研究对象,应运Levins和Shannon生态位宽度指数、Pianka生态位重叠指数、方差比率法(VR)、χ~2检验、联结系数(AC)、共同出现百分率(PC)、点相关系数(PCC)和Godron稳定性等研究方法,分析紫果云杉群落内主要乔木物种的生态位、种间关系及群落稳定性。【结果】紫果云杉的重要值和生态位宽度均最大,并与其他主要种间均存在生态位重叠,但重叠指数(O_(ik))均小于0.5;群落内乔木主要物种间总体表现为不显著正关联,χ^(2)、AC、PC、PCC检验结果表明群落内种对间的关联显著程度不高,种间关联较为松散;群落内乔木层的稳定性比值为(40,60),较理论稳定性比值(20,80)较远,表明当前紫果云杉群落处于稳定性不高的状态。【结论】当前洮河上游紫果云杉群落不稳定,群落内各物种间呈现独立分布格局,建群种紫果云杉与其他伴生种之间关联度不高,竞争较弱,因此,在紫果云杉群落保护和恢复中,应选择生态习性和生物学特性相近的物种开展人工补栽措施,维持种间平衡,提高群落稳定性。【Objective】To study the niche,interspecific association and community stability of the main tree species in the community in order to understand the resource use habits of the species in the community and to understand the structure and stability of the community,which is of great importance for the sustainable management of forests,as well as for the restoration and reconstruction of degraded forests.【Method】In this study,the natural forest community of Picea purpurea in the upstream reaches of Taohe river was taken as the research object.The niches,interspecific associations and community stability of the main tree species were analyzed by using Levins and Shannon niche breadth index,Pianka niche overlap index,variance ratio(VR),χ^(2)test,association coefficient(AC),percentage of co-occurrence(PC),point correlation coefficient(PCC)and Godron stability.【Result】The importance value and niche width of P.purpurea were the largest,and there was niche overlap with other main species,but the overlap index(Oik)was less than 0.5.The overall performance of the main species in the community was not significantly positively correlated;the overall performance of the main tree species in the community was not significantly positively correlated,and the results ofχ^(2),AC,PC and PCC tests showed that the correlation between pairs of species in the community was not significant,and the correlation between species was relatively loose;the stability ratio of the tree layer in the community was (40, 60), which was far from the theoretical stability ratio (20, 80), indicating that the current purple spruce community was in a state of low stability.【Conclusion】The current P. purpurea community in the upstream of the Taohe river is unstable, and each species in the community shows an independent distribution pattern, and the correlation between the established species, P. purpurea and the other companion species is not high, and the competition is weak;Therefore, in the protection and restoration of P. purpurea com

关 键 词：洮河上游 紫果云杉 生态位 种间联结 群落稳定性 

分 类 号：S791.189[农业科学—林木遗传育种]