基于CiteSpace的植被格局对侵蚀产沙影响研究现状与趋势

Research status and trends of vegetation pattern affecting erosion and sediment yield based on CiteSpace

植被是防蚀减沙的重要措施。当前关于植被类型和数量对侵蚀产沙的影响已较为清晰,但其格局与侵蚀产沙的关系仍不明确。利用文献计量分析工具CiteSpace对Web of Science数据库中2005—2020年发表的植被格局对侵蚀产沙影响的相关文献进行分析,对文献基本信息进行全面梳理。结合典型报道评述,对评估模型方法、生态水文效应和不同因素耦合3方面的现状和进展开展综合评述,并提出该主题未来研究趋势建议。结果表明:目前的研究难以全面满足植被恢复过程中以科学布局提高生态—经济综合效应的科技需求;新兴的泥沙连通性体系还有待完善,对植被格局变化的响应机制仍不明确。未来应完善连通性理论及其指标,明晰植被格局影响侵蚀产沙的过程机制;加强模型与表征指数优化,提升植被格局与侵蚀产沙变化模拟能力;重视耦合影响与功能权衡,丰富植被格局影响侵蚀产沙的研究内涵。有关研究可为深入开展植被格局对侵蚀产沙影响的研究提供方向性参考。

[Background]Land degradation is one of the most critical environmental problems in the world.Soil erosion,a vital cause of land degradation,has been engaged more attention.Vegetation has become an important measurement for soil erosion control and sediment yield reduction.Current studies cannot fully meet the scientific and technological needs of scientific distribution and optimal distribution in the process of vegetation restoration to achieve the optimal eco-economic effect.At present,the impact of vegetation type and quantity on soil erosion and sediment yield has been relatively clear.However,how vegetation landscape patterns influence soil erosion and sediment yield is still unclear,which has become a hotspot.[Methods]CiteSpace,a bibliometric analysis tool,was used to analyze articles published between 2005 and 2020.All the articles were searched from the Web of Science Core Collection with subject“vegetation”“landscape pattern”“soil and water loss”and“erosion”.Basic data,for example,articles number,nationality,the title of publication,institution,author,keywords,and burst time were statistically analyzed.Cluster analysis was carried out on the results,and the burst period of keywords was calculated.Combining with typical reports and reviews,the current situation and progress of assessment model methods,eco-hydrological effects,and coupling of different factors were reviewed.Suggestions for the trend of promoting this research topic were summarized in those bases.[Results]The number of published articles was increasing year by year.Keywords that were still in the burst period in 2020 were related to eco-hydrology.These keywords indicated that researchers were focusing on quantifying vegetation patterns and their internal structure.The key points of research from 2005 to 2020 were model evaluation,eco-hydrological benefits,and coupling factors.These studies were aimed to reveal the process and mechanism of vegetation patterns affecting erosion and sediment production and to quantify its relationship,and then to improve the prediction accuracy of the model or optimize the regulation mode,which may provide a basis for land use management and ecological environment governance.In the future,more attentions should be paid to 1)improve the connectivity theory and related indicators,and clarifying the process mechanism of erosion affected by vegetation patterns;2)strengthen the optimization of models and optimize the characterization indices,and then to promote the ability of simulating the sediment responses to vegetation patterns;3)focus on the balance of coupling factors and function,enriching the research connotation.[Conclusions]Vegetation pattern affects the local hydrological process by changing the local sediment connectivity and plays an important role in reducing erosion.The concept of connectivity introduced into related research will provide new perspectives to the study on the response of sediment to vegetation pattern changes.In the future,it is necessary to improve the relevant indicators,to improve the accuracy of the model,and to emphasize the coupling influence and function weight.