纳帕海高原湿地不同干扰强度下土壤真菌的分布格局
收稿日期: 2014-05-14
录用日期: 2014-09-07
网络出版日期: 2014-11-17
基金资助
云南省应用基础研究面上项目(2013-FB053);国家自然科学基金(40971285);国家自然科学基金(31370497);国家自然科学基金(41001332);国家重点基础研究发展计划(973计划)前期研究专项(2012CB426509);云南省科技计划(2010CA010);云南省科技计划(2008CA006);云南省科技创新人才计划(2012HC007);云南省生态学优势特色重点学科(群)建设项目共同资助
Soil fungi distribution patterns under different levels of disturbance in the wetland of Napahai Plateau
Received date: 2014-05-14
Accepted date: 2014-09-07
Online published: 2014-11-17
将无干扰的原生沼泽作为对照, 运用比较法研究了纳帕海高原湿地不同干扰强度下形成的湿地利用类型, 即沼泽(无干扰)、沼泽化草甸(轻度干扰)、草甸(中度干扰)和垦后湿地(重度干扰) 4个湿地利用类型的碳氮含量及其分布格局, 揭示干扰对纳帕海不同湿地利用类型碳氮及土壤真菌分布的影响。研究表明: (1) 4个湿地利用类型上下层土壤有机质(SOM)、全氮(TN)、碳氮比(C:N)和pH值均有显著的差异性(p < 0.01), 并且随着干扰强度的增大, SOM和TN含量逐渐减少。(2)土壤真菌经PDA培养基培养后计数, 在同一湿地类型上层的真菌数量大于下层, 随着干扰强度的增加, 真菌的数量逐渐增加。相关性分析表明: 真菌的数量与pH值、SOM和TN呈极显著负相关, 与C:N呈显著正相关。(3)系统发育研究表明: 纳帕海湿地分布有土壤真菌Ascomycota、Basidiomycota和Zygomycota, 其中Ascomycota是优势类群, 在高原湿地土壤碳氮分解等物质循环过程中Ascomycota处于主导地位。
曹萍麟,陆梅,田昆,吕思彤,杨洪昇,姚茜,李丽萍,岳海涛 . 纳帕海高原湿地不同干扰强度下土壤真菌的分布格局[J]. 植物生态学报, 2014 , 38(11) : 1166 -1173 . DOI: 10.3724/SP.J.1258.2014.00112
Key words： carbon; disturbance intensity; nitrogen; plateau wetland; soil fungi
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