摘要
对川西亚高山针叶林土壤动物群落汶川大地震前后的结构特征进行对比研究,旨在通过土壤动物对地震的响应了解地震对川西亚高山针叶林生态系统功能及过程的影响.结果显示,地震后大型土壤动物类群数、个体密度、DG指数均有小幅增长,但无显著差异;中小型土壤动物类群中,湿生土壤动物线虫的个体密度有一定增加,而干生土壤动物蜱螨目、弹尾目的个体密度有一定减少,但均无显著差异;土壤原生动物由7 083个/g鲜土降至625个/g鲜土,有极显著差异(P<0.01).研究表明,受地震影响的林地内,不同体型的土壤动物响应不同,其中,大型土壤动物多样性有所增加,主要与微域生境趋于复杂化有关,而小型和微型土壤动物多样性有所减少,则与地下水位的变化有关.
Located at the transition between the Sichuan Basin and the Tibet Plateau, the area of Wenchuan Earthquake is one of the most ecologically fragile regions in China and plays an important role in ecological security of the Sichuan Basin. The earthquake resulted in great impacts on ecosystems in this area. Although numerous studies have been done about the changes of vegetation and giant panda habitat caused by the Wenchuan Earthquake, little field survey is yet done about the soil fauna response to the earthquake. This research studied the changes of soil fauna ecological characteristics in a subalpine coniferous plantation in western Sichuan after Wenchuan Earthquake. The group number, individual number and DG index of macrofauna increased without significant differences. Among mesofauna, Nematoda individuals increased, however Acarina and Collembola individuals decreased. As for microfauna, the individual number of soil protozoa decreased significantly. The results showed that soil protozoa are more sensitive to earthquake than macrofauna and mesofauna, therefore a good biological indicator for environmental changes.
出处
《应用与环境生物学报》
CAS
CSCD
北大核心
2014年第4期723-726,共4页
Chinese Journal of Applied and Environmental Biology
基金
国家自然科学基金项目(30771702
30471378)
教育部新世纪优秀人才支持计划项目(NCET-07-0592)
"十一五"国家重大科技支撑计划课题(2006BAC01A11)资助~~
关键词
汶川大地震
亚高山针叶林
土壤动物
群落结构
Wenchuan earthquake
subalpine coniferous plantation
soil fauna
community structure
