为揭示森林群落研究态势及热点,该文基于中国期刊全文数据库(CNKI)和Web of Science(WOS)数据库3 977篇目标文献,采用文献计量和知识图谱分析相结合的研究方法,直观刻画了森林群落研究的演进态势及研究热点。结果表明:(1)在发文量上,CNK...为揭示森林群落研究态势及热点,该文基于中国期刊全文数据库(CNKI)和Web of Science(WOS)数据库3 977篇目标文献,采用文献计量和知识图谱分析相结合的研究方法,直观刻画了森林群落研究的演进态势及研究热点。结果表明:(1)在发文量上,CNKI数据库自1983年中国召开全国环境保护会议后发文量增速加快,受科教兴国战略的影响,国内发文量呈中高水平发展态势;WOS数据库在1992年联合国环境与发展大会召开后发文量呈增长趋势,直到2020年开始有所回落。(2)在核心作者上,CNKI数据库中共有核心作者147位,其发文量占发文总量的64.96%;WOS数据库中核心作者有117位,其发文量占总发文量的27.21%。(3)从关键词共现图谱、聚类图谱看,CNKI数据库中森林群落、物种多样性、群落结构、生物多样性等词出现频率较高,且与其他关键词联系紧密,反映出国内的研究热点是森林群落物种资源、结构特征、树种生长发育与生长环境;WOS数据库中management(监管)、community forest(共有林)、conservation(保护)、biodiversity(生物多样性)等词出现频率较高并与其他关键词联系紧密,表明国际森林群落研究热点为森林群落物种资源的保护与管理、群落结构特征、森林资源可持续发展。展开更多
Beta-diversity reflects the spatial changes in community species composition which helps to understand how communities are assembled and biodiversity is formed and maintained. Larch(Larix) forests, which are coniferou...Beta-diversity reflects the spatial changes in community species composition which helps to understand how communities are assembled and biodiversity is formed and maintained. Larch(Larix) forests, which are coniferous forests widely distributed in the mountainous and plateau areas in North and Southwest China, are critical for maintaining the environmental conditions and species diversity. Few studies of larch forests have examined the beta-diversity and its constituent components(species turnover and nestedness-resultant components). Here, we used 483 larch forest plots to determine the total betadiversity and its components in different life forms(i.e., tree, shrub, and herb) of larch forests in China and to evaluate the main drivers that underlie this beta-diversity. We found that total betadiversity of larch forests was mainly dependent on the species turnover component. In all life forms,total beta-diversity and the species turnover component increased with increasing geographic, elevational, current climatic, and paleoclimatic distances. In contrast, the nestedness-resultant component decreased across these same distances. Geographic and environmental factors explained 20%-25% of total beta-diversity, 18%-27% of species turnover component, and 4%-16% of nestedness-resultant component. Larch forest types significantly affected total beta-diversity and species turnover component. Taken together, our results indicate that life forms affect beta-diversity patterns of larch forests in China, and that beta-diversity is driven by both niche differentiation and dispersal limitation. Our findings help to greatly understand the mechanisms of community assemblies of larch forests in China.展开更多
Here,we characterize the temporal and spatial dynamics of forest community structure and species diversity in a subtropical evergreen broad-leaved forest in China.We found that community structure in this forest chang...Here,we characterize the temporal and spatial dynamics of forest community structure and species diversity in a subtropical evergreen broad-leaved forest in China.We found that community structure in this forest changed over a 15-year period.Specifically,renewal and death of common species was large,with the renewal of individuals mainly concentrated within a few populations,especially those of Aidia canthioides and Cryptocarya concinna.The numbers of individual deaths for common species were concentrated in the small and mid-diameter level.The spatial distribution of community species diversity fluctuated in each monitoring period,showing a more dispersed diversity after the 15-year study period,and the coefficient of variation on quadrats increased.In 2010,the death and renewal of the community and the spatial variation of species diversity were different compared to other survey years.Extreme weather may have affected species regeneration and community stability in our subtropical monsoon evergreen broad-leaved forests.Our findings suggest that strengthening the monitoring and management of the forest community will help better understand the long-and short-term causes of dynamic fluctuations of community structure and species diversity,and reveal the factors that drive changes in community structure.展开更多
文摘为揭示森林群落研究态势及热点,该文基于中国期刊全文数据库(CNKI)和Web of Science(WOS)数据库3 977篇目标文献,采用文献计量和知识图谱分析相结合的研究方法,直观刻画了森林群落研究的演进态势及研究热点。结果表明:(1)在发文量上,CNKI数据库自1983年中国召开全国环境保护会议后发文量增速加快,受科教兴国战略的影响,国内发文量呈中高水平发展态势;WOS数据库在1992年联合国环境与发展大会召开后发文量呈增长趋势,直到2020年开始有所回落。(2)在核心作者上,CNKI数据库中共有核心作者147位,其发文量占发文总量的64.96%;WOS数据库中核心作者有117位,其发文量占总发文量的27.21%。(3)从关键词共现图谱、聚类图谱看,CNKI数据库中森林群落、物种多样性、群落结构、生物多样性等词出现频率较高,且与其他关键词联系紧密,反映出国内的研究热点是森林群落物种资源、结构特征、树种生长发育与生长环境;WOS数据库中management(监管)、community forest(共有林)、conservation(保护)、biodiversity(生物多样性)等词出现频率较高并与其他关键词联系紧密,表明国际森林群落研究热点为森林群落物种资源的保护与管理、群落结构特征、森林资源可持续发展。
基金supported by the Major Program for Basic Research Project of Yunnan Province (No. 202101BC070002)the National Natural Science Foundation of China (No. 32201426, No. 31988102)the National Science and Technology Basic Project of China (No. 2015FY210200)
文摘Beta-diversity reflects the spatial changes in community species composition which helps to understand how communities are assembled and biodiversity is formed and maintained. Larch(Larix) forests, which are coniferous forests widely distributed in the mountainous and plateau areas in North and Southwest China, are critical for maintaining the environmental conditions and species diversity. Few studies of larch forests have examined the beta-diversity and its constituent components(species turnover and nestedness-resultant components). Here, we used 483 larch forest plots to determine the total betadiversity and its components in different life forms(i.e., tree, shrub, and herb) of larch forests in China and to evaluate the main drivers that underlie this beta-diversity. We found that total betadiversity of larch forests was mainly dependent on the species turnover component. In all life forms,total beta-diversity and the species turnover component increased with increasing geographic, elevational, current climatic, and paleoclimatic distances. In contrast, the nestedness-resultant component decreased across these same distances. Geographic and environmental factors explained 20%-25% of total beta-diversity, 18%-27% of species turnover component, and 4%-16% of nestedness-resultant component. Larch forest types significantly affected total beta-diversity and species turnover component. Taken together, our results indicate that life forms affect beta-diversity patterns of larch forests in China, and that beta-diversity is driven by both niche differentiation and dispersal limitation. Our findings help to greatly understand the mechanisms of community assemblies of larch forests in China.
基金funded by the Guangxi Natural Science Foundation Program (2022GXNSFAA035583 and 2020GXNSFAA159108)National Natural Science Foundation of China (32060305)+2 种基金Foundation of Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University)Ministry of Education, China (ERESEP 2021Z06)Chinese Forest Biodiversity Monitoring Network
文摘Here,we characterize the temporal and spatial dynamics of forest community structure and species diversity in a subtropical evergreen broad-leaved forest in China.We found that community structure in this forest changed over a 15-year period.Specifically,renewal and death of common species was large,with the renewal of individuals mainly concentrated within a few populations,especially those of Aidia canthioides and Cryptocarya concinna.The numbers of individual deaths for common species were concentrated in the small and mid-diameter level.The spatial distribution of community species diversity fluctuated in each monitoring period,showing a more dispersed diversity after the 15-year study period,and the coefficient of variation on quadrats increased.In 2010,the death and renewal of the community and the spatial variation of species diversity were different compared to other survey years.Extreme weather may have affected species regeneration and community stability in our subtropical monsoon evergreen broad-leaved forests.Our findings suggest that strengthening the monitoring and management of the forest community will help better understand the long-and short-term causes of dynamic fluctuations of community structure and species diversity,and reveal the factors that drive changes in community structure.
