为更好地了解高寒草甸生态系统研究现状,以中国知网(CNKI)和Web of Science(WoS)数据库为数据来源,对2014—2024年间所发表的相关文献进行检索。利用CiteSpace与VOSviewer可视化分析工具对该领域研究前沿与热点演变进行分析,结果表明,...为更好地了解高寒草甸生态系统研究现状,以中国知网(CNKI)和Web of Science(WoS)数据库为数据来源,对2014—2024年间所发表的相关文献进行检索。利用CiteSpace与VOSviewer可视化分析工具对该领域研究前沿与热点演变进行分析,结果表明,高寒草甸生态系统领域的研究以国内学者及研究机构为主导,国内研究呈现出较强的区域性和研究热点的相对集中特点,国外研究则更注重在全球气候变化影响下高寒草甸生态系统的生态恢复能力探究。展开更多
In order to decipher phenomenon of tree line changing with climate variety, the trend of tree line on the northern slope of Changbai Mountain was studied. Based on the meteorological data of Changbai Mountain, the Jan...In order to decipher phenomenon of tree line changing with climate variety, the trend of tree line on the northern slope of Changbai Mountain was studied. Based on the meteorological data of Changbai Mountain, the January temperature (the limiting effect for tree line) and annual mean temperature were mainly investigated. In the ecotone between Betula ermanii and alpine tundra, the number and diameter at ground level of Betula ermanii in the plots were measured. According to the correlation between diameter at ground level (DGL) and age, the diameter at ground level can represent age directly. The results showed that the distribution age of Betula ermanii was in the trend of decreasing with elevation rising. In resent years, the annual mean temperature near Changbai Mountain is rising, which has led to the tree line ascending.展开更多
文摘为更好地了解高寒草甸生态系统研究现状,以中国知网(CNKI)和Web of Science(WoS)数据库为数据来源,对2014—2024年间所发表的相关文献进行检索。利用CiteSpace与VOSviewer可视化分析工具对该领域研究前沿与热点演变进行分析,结果表明,高寒草甸生态系统领域的研究以国内学者及研究机构为主导,国内研究呈现出较强的区域性和研究热点的相对集中特点,国外研究则更注重在全球气候变化影响下高寒草甸生态系统的生态恢复能力探究。
基金973 Project (G1999043407-1) and Project for pioneering new knowledge from Chinese Academy of Sciences (KZCX2-406-1-3).
文摘In order to decipher phenomenon of tree line changing with climate variety, the trend of tree line on the northern slope of Changbai Mountain was studied. Based on the meteorological data of Changbai Mountain, the January temperature (the limiting effect for tree line) and annual mean temperature were mainly investigated. In the ecotone between Betula ermanii and alpine tundra, the number and diameter at ground level of Betula ermanii in the plots were measured. According to the correlation between diameter at ground level (DGL) and age, the diameter at ground level can represent age directly. The results showed that the distribution age of Betula ermanii was in the trend of decreasing with elevation rising. In resent years, the annual mean temperature near Changbai Mountain is rising, which has led to the tree line ascending.
