基于CiteSpace的凋落物水土保持效应研究现状及趋势

Research Status and Future Trends of Litter Soil and Water Conservation Effect Based on CiteSpace Software

面对当前全球性的一系列生态环境问题,如何正确认识和利用森林植被的水土保持功能已成为一项重要课题,其中凋落物的水土保持效应已引起世界各国学者和研究机构的广泛关注。基于Web of Science核心全集数据库和CNKI数据库,运用数据可视化应用软件CiteSpace对国际国内有关凋落物水土保持效应的研究文献进行分析,旨在理清研究概况,分析学科与知识结构,探索研究热点前沿和趋势。研究发现:(1)2000—2020年,关于凋落物水土保持效应的研究论文数量呈现出稳步增长的趋势,近十年发文量达1546篇,占总发文量的66.7%,美国在凋落物水土保持效应研究领域引领世界,发文量和国际合作的中介中心性均最高,中国发文量排名第二,但国际合作和影响力偏弱。(2)凋落物水土保持效应研究在发展初期的知识基础主要以涉及“碳13核磁共振”“典范对应分析”“微视角”“生物多样性”“地中海森林”等聚类,在“酸碱度”聚类形成了有影响力的成果,在发展第二阶段主要集中于“生态化学计量”聚类,形成Cornwell关于凋落物在世界范围内分解速率的决定因素的论文成为领域内里程碑式研究成果。(3)凋落物水土保持效应研究历程大致分为“起步、发展、全面提升”三个阶段,从2017年起,由土地利用和植被退化引起的全球性气候问题成为最新的研究前沿,且强突现效应仍在持续,应为今后一段时期内的主要研究趋势和方向。(4)国内关于凋落物水土保持效应的研究没有形成较为突出的重点研究热点和明显的发展趋势,研究内容主要集中在“持水量”“林冠截留”“人工林”等相对基础的研究层面。

In the face of a series of global ecological and environmental problems,how to correctly understand and utilize the soil and water conservation function of forest vegetation has become an important topic,and the soil and water conservation effect of litter has attracted wide attention from scholars and research institutions all over the world.Based on the core complete database of Web of Science and CNKI database,GiteSpace software was used to analyze the international and domestic research literature on litter soil and water conservation effect,aiming to clarify the research overview,analyze the discipline and knowledge structure,and explore the research hotspots,frontiers and trends.The research findings are as follows:(1)From 2000 to 2020,the number of research papers about litter soil and water conservation effect showed a steady growth trend.In recent ten years,the number of papers published reached 1546,accounting for 66.7%of the total number of papers published.The United States led the world in the field of litter soil and water conservation effect research,with the highest number of publications and the intermediary centrality of international cooperation,while China ranked the second in the number of publications,but the international cooperation and influence were weak.(2)In the early stage of development,the knowledge base of litter soil and water conservation effect mainly involved the"carbon 13 nuclear magnetic resonance(NMR)","model corresponding analysis","micro perspective","biological diversity","Mediterranean forest",and so on,which had formed influential achievements in"pH"clustering.In the second stage of development,it mainly focused on"ecological stoichiometric"clustering,and formed Cornwell's paper on the decisive factors of litter decomposition rate in the world,which became a landmark in the field of research.(3)The research process of litter soil and water conservation effect was roughly divided into three stages,such as starting,developing,comprehensively improving.From 2017,the global climate problems caused by land use and vegetation degradation had become the latest research frontier,and the strong emergent effect continued,which should be the main research trend and direction in the future.(4)The domestic research on the effects of soil and water conservation of litter has not formed a relatively prominent focus and obvious development trend,and the research contents mainly focused on relative basic research levels such as"water holding capacity","canopy interception","plantation".