摘要
土壤微生物对林下植被动态的调控作用对于森林生态系统功能的发挥至关重要.火烧和氮沉降均会直接或间接影响土壤微生物群落的组成与活性.在氮沉降的背景下,火烧后土壤微生物对林下植被恢复的调控是否中断、失调,对生态系统是否健康稳定发展起到关键作用.综述了火烧和氮沉降对林下植被动态和土壤微生物群落的影响及其可能的潜在交互作用,论述了土壤微生物对林下植被可能的调节作用.不同地区、不同森林的林下植被对火烧和氮沉降的响应不同,且可能存在不同的交互响应.目前主要侧重于单个火烧或者氮沉降因子对林下植被动态及其调控机制的研究,亟须开展在火烧格局变化和大气氮沉降同时发生的情景下对林下植被可能产生的影响,以及其发生变化的土壤微生物学机制相关的研究.研究结果有助于为火烧后林下植被恢复机制研究提供新的依据,同时为林火干扰生态系统的适应性管理提供决策支持.
Regulation of soil microbes on understory vegetation dynamic plays an important role in forest ecosystem function.Fire and atmospheric nitrogen(N)deposition can directly or indirectly influence the composition and activity of soil microbes.Whether this regulation effects will be interrupted or imbalance under nitrogen deposition scenario in forest fire disturbance ecosystem,play an important role in healthy and stable development of ecosystems.This paper summarized the effects of fire and N deposition on understory vegetation and soil microbial community and the potential interactions,and analyzed the possible regulation mechanism of soil microbes on understory vegetation dynamics.Different forests in different regions have inconsistent responses to fire and N addition,and the combined effects of these two factors on understory vegetation may not the simple addition of single factor.Current researches mainly focused on the response of understory vegetation to fire or N addition and the potential mechanism,and scarce were about the combined effects of these two factors on understory vegetation and microbes mechanism.The results will not only provide a new basis to the recovery mechanism of understory vegetation in fire disturbance field in N deposition,but also have significant implications for the sustainable and adaptive management of the forest fire disturbance ecosystem.
作者
苗原
刘啸林
王敏
朱雅
刘珂彤
徐琪
韩士杰
苗仁辉
Miao Yuan;Liu Xiaolin;Wang Min;Zhu Ya;Liu Ketong;Xu Qi;Han Shijie;Miao Renhui(School of Life Sciences,Henan University,Kaifeng 475004,China)
出处
《河南师范大学学报（自然科学版）》
CAS
北大核心
2021年第6期19-23,F0002,共6页
Journal of Henan Normal University(Natural Science Edition)
基金
河南省重大公益专项(201300311300)
国家自然科学基金(31670477)
河南省科技攻关项目(192102110085)
河南省自然科学基金(202300410082).
关键词
火干扰
全球变化
群落演替
生物多样性
微生物组成
fire disturbance
global change
community succession
biodiversity
microbial composition
