基于文献计量的凋落物研究现状及热点分析

在生态学中,凋落物作为过渡层的研究价值日趋重要。为进一步探究凋落物的现存特征以及热点问题,基于文献计量学的相关方法分析,分别以中国知网数据库(CNKI)和Web of Science核心数据库集合中的文献作为基础数据源。运用Bibexcel、Ucinet、和Netdraw等软件得出研究文献中的高频词共词矩阵和关键词网络化图谱。再利用SPSS进行聚类分析,将研究内容分为五大群集,据此分析枯落物的特性及未来研究方向。研究结果表明:①就文献发文量来看国内外对凋落物的研究,国际上开始的时间较早,国内的研究比国际滞后10年左右,但国内的发文量和增长速度要明显高于国际上;两者都在21世纪开始趋于成熟稳定发展。②国内的凋落物研究以森林生态系统内部的各因子之间的联系为主;国外更偏向于把研究凋落物的分解、土壤营养元素归还以及化学元素转变所带来的气候改变和对环境的污染程度作为该领域研究热点。③经过共现网络化可视分析得出,国内凋落物研究中一定程度上可将凋落物、凋落物分解、生物量、人工林、土壤养分、氮沉降等词作为该领域研究热点和未来延伸发展方向。④通过聚类分析,国内外的研究有相近的部分,都涉及到凋落物的分解方面,化学元素与凋落物、土壤质地的影响。但二者不同的是国内侧重于研究森林生态系统内部的各因子之间的联系,而国际上着重上研究凋落物的分解、土壤营养元素归还以及化学元素转变,所带来的气候改变和对环境的污染程度。由此可以得出,有关凋落物的研究在国内外都是重点,今后应加强国际间的合作,着重研究枯落物特性的变化对气候改变和环境污染的影响。

Research Status and Hot Spot Analysis of Litter Based on Bibliometrics

Abstract: In ecology, the research value of litter as a transition layer is increasingly important. In order to further explore the existing characteristics and hotspots of litter, this paper analyzes the relevant methods of bibliometrics, and uses the literature in the China Knowledge Network Database (CNKI) and Web of Science core database collection as the basic data sources. High-frequency word co-word matrices and keyword networked maps in the research literature were obtained using software such as Bibexcel, Ucinet, and Netdraw. Then use SPSS for cluster analysis, the research content is divided into five clusters, based on which the characteristics of the litter and future research directions are analyzed. The results show that: (1) The research on litter at home and abroad is based on the amount of literature published. The international start time is earlier. The domestic research is about 10 years behind the international, but the growth rate of domestic publications and speed is significantly higher than that. Internationally; both have begun to mature and develop in the 21st century. 2 Domestic litter research is mainly based on the links among various factors within the forest ecosystem; foreign countries are more inclined to study the decomposition of litter, the return of soil nutrients and the transformation of chemical elements, resulting in climate change and environmental The degree of pollution is a hot spot in this field. 3 Through co-occurrence network visualization analysis, the litter, litter decomposition, biomass, plantation, soil nutrient, nitrogen deposition and other words can be used as research hotspots and future extensions in the field. Direction of development. 4 Through cluster analysis, there are similar parts in domestic and foreign research, all related to the decomposition of litter, the influence of chemical elements and litter, soil texture. But the difference between the two is that the domestic focus is on the study of the linkages between the various factors within the forest ecosystem, while the international focus on the decomposition of litter, the return of soil nutrients and the transformation of chemical elements, the climate change and The degree of environmental pollution. It can be concluded that the research on litter is the focus at home and abroad. In the future, international cooperation should be strengthened, focusing on the impact of changes in litter characteristics on climate change and environmental pollution.