生态学杂志2017，Vol.36Issue(11)：3086-3093,8.DOI:10.13292/j.1000-4890.201711.014
长白山苔原带植被变化与土壤微生物、酶活性及土壤肥力的相关性
Vegetation change in relation to soil microbes, enzyme activity and soil fertility in the tundra of Changbai Mountain
摘要
Abstract
Herbaceous plants have encroached into tundra area of Changbai Mountain under warming climate,which has severely changed the tundra vegetation.We analyzed soil microbes,soil enzyme activity and soil fertility at different stages of herbaceous encroachment.We also analyzed subsequent changes of soil microbial community structure and enzyme activity and the effects of soil microbial community structure and enzyme activity on soil fertility as well as the effects of changes in soil fertility on vegetation changes.Results showed that:(1) Soil microbes and soil enzyme activity changed as the vegetation changed.Among these changes,soil microbial PLFAs and enzyme activity continued to increase with the level of herbaceous encroachment.However,soil microbial PLFAs and enzyme activity decreased when the herbaceous plants dominated the plant communities.(2) The decomposition of soil organic matter was accelerated and the available nutrients increased with the increase of soil microbial PLFAs and enzyme activity under high level of herbaceous encroachment.(3) A transformation process from positive feedback to negative feedback occurred between soil microbes,enzyme activity and the level of herbaceous encroachment.Therefore,the changes of soil microbes and enzyme activity significantly affected herbaceous plant encroachment of the tundra vegetation of Changbai Mountain.关键词
长白山/苔原带/植被变化/土壤微生物/土壤酶活性/土壤肥力Key words
Changbai Mountain/tundra/vegetation change/soil microbes/soil enzyme activity/soil fertility引用本文复制引用
张英洁,靳英华,谷晓楠,许嘉巍,陶岩,贺红士,王嫒林,刘羽霞,牛莉平..长白山苔原带植被变化与土壤微生物、酶活性及土壤肥力的相关性[J].生态学杂志,2017,36(11):3086-3093,8.基金项目
长白山科学研究院开放基金资助项目(201501)、国家自然科学基金项目(41571078,41171072)和长白山资源与生物多样性吉林省联合重点实验室资助. （201501）
