濒危植物单性木兰林区土壤动物群落结构与季节动态  

Community composition and seasonal dynamics of soil fauna in endangered plant Kmeria septentrionalis forest

作　　者：李晓东[1,2] 史沉鱼[1] 覃国乐[1] 覃文更 杨敏云 杨尚渝 

机构地区：[1]河池学院化学与生物工程学院,宜州546300 [2]南京师范大学生命科学学院/江苏省生物多样性与生物技术重点实验室,南京210046 [3]广西木论国家级自然保护区管理局,环江547100 [4]广西宜州市农业局,宜州546300

出　　处：《华中农业大学学报》2015年第4期20-26,共7页Journal of Huazhong Agricultural University

基　　金：广西自然科学基金项目(2012GXNSFBA053056);广西教育厅科研项目(201203YB167;201106LX586)

摘　　要：为研究国家一级保护植物单性木兰林区土壤动物群落结构和季节动态,2012年3月至2013年1月,逐月对位于广西木论国家级自然保护区的单性木兰林区土壤动物群落,按凋落物层和土壤表面向下每5cm为1层共5层进行四季调查,并对群落结构、垂直分布、多样性和季节动态进行分析。结果表明:从自然保护区的林区2 200份土样中共获得大型、中型和湿生土壤动物12 937只,隶属于6门11纲30类,优势类群为弹尾目和蜱螨目,常见类群为线虫纲、后孔寡毛目、近孔寡毛目、膜翅目和双翅目,全年A/C值<1;土壤动物类群和个体数量垂直分布具有表聚性特征,但不是严格的逐层递减,且随季节变化有所波动。该自然保护区土壤动物类群数的季节动态为秋季>冬季>春季>夏季;个体数季节动态为秋季>夏季>春季>冬季;多样性的季节动态为秋季>春季>冬季>夏季。To study the community composition, vertical structure, diversity and seasonal dynamics of soil fauna in Kmeria septentrionalis forest which is the first-class state protected plant in China, a monthly investigation was conducted between Mar., 2012 and Jan., 2013 in litter layer and soil layers with the depths of 0-5 cm, 5-10 cm,10-15 cm and 15-20 cm. A total of 12 937 of soil fauna individuals, belonging to 6 phyla, 11 classes and 30 groups, respectively, were collected in 2 200 soil samples during the study. Two dominant groups,Acarina and Collembola, accounted for 74.69% of the soil fauna indi- viduals. Five common groups, Nematoda, Oligoehaet-a opisthopora,Oligochaeta plesiopara, Hymenop- tera and Diptera, accounted for 22.26%. The A/C value % 1. The vertical distribution of soil fauna groups and individuals in the soil profiles showed an surface accumulation, but no obvious decreasion lay- er by layer in some months and varied with the change of seasons. The seasonal change pattern of soil fauna group number of Krneria septentrionalis forest was autumn〉winter〉spring〉summer. The num- ber of soil fauna individual was autumn〉summer〉spring〉winter. The diversity of soil fauna groups was autumn〉spring〉winter〉summer.

关 键 词：土壤动物 单性木兰 群落组成 季节动态 

分 类 号：S154.5[农业科学—土壤学] Q958.15[农业科学—农业基础科学]