摘要
多样性反映了群落间物种组成差异。通过研究β多样性可以为区域的生物多样性保护提供科学依据。以敦煌北山及马鬃山地区为研究区域,采用系统布设样方法,共设置79个植物群落样地,探讨群落间β多样性及其组分,分析其与气候因素、土壤因素和地理距离之间的相互关系。结果表明:(1)敦煌北山及马鬃山地区的植物群落存在地理衰减格局,群落间差异较大,β多样性以更替组分为主。(2)气候、土壤和地理距离对β多样性及其更替组分有显著影响,其中气候因素影响最大,地理距离影响最小。(3)通过多元回归分析(MRM)表明,气候因素、土壤因素与地理距离对β多样性及其更替组分作用存在差异,气候和土壤因素作用远大于地理距离。综上所述,敦煌北山及马鬃山地区植物群落β多样性及其更替组分是生境过滤和扩散限制共同作用的结果,生境过滤对其影响占有较大的比重,环境的异质性是影响该地区物种差异的重要因素。
diversity reflects the different composition of species between communities and is prevalent topic in ecological research.Based on the community survey sites in Beishan and Manongshan areas of Dunhuang of Bray-Curtis index of 79 plants,this study analyzed the relationship between community and climatic factors,soil factors and geographical distance.The results showed a geographical decay pattern of plant communities in the Beishan and Manongshan areas of Dunhuang,and theβdiversity was dominated byβsim.Theβdiversity and its turnover components were significantly affected by climate,soil,and geographical distance.Multiple regression analysis(MRM)showed that climate,and soil factors and geographical distance affectedβdiversity and its turnover components differently,and the effects of climate and soil factors were more important than the geographical distance.These results indicated thatβdiversity of plant community species in the Beishan and Manongshan areas of Dunhuang resulted from habitat filtration and dispersal restriction.Species composition of communities differed greatly,and habitat filtration accounted for a large proportion of species turnover.
作者
李星
辛智鸣
董雪
李永华
段瑞兵
马媛
李星
李宽
LI Xing;XIN Zhiming;DONG Xue;LI Yonghua;DUAN Ruibing;MA Yuan;LI Xing;LI Kuan(Experimental Center for Desert Forestry,CAF,Dengkou 015200,Inner Mongolia,China;Inner Mongolia Dengkou Desert Ecosystem National Observation Research Station,Dengkou 015200,Inner Mongolia,China;Institute of Desertification Studies,CAF,Beijing 100091,China;Kumtage Desert Ecosystem National Observation Research Station,Dunhuang 736200,Gansu,China;Dunhuang Desert Ecosystem National Observation Research Station,Dunhuang 736200,Gansu,China;College of Ecology and Environment,Inner Mongolia University,Hohhot 010000,Inner Mongolia,China)
出处
《干旱区研究》
CSCD
北大核心
2022年第5期1464-1472,共9页
Arid Zone Research
基金
中央级公益性科研院所基本科研业务费专项资金(CAFYBB2020ZE005)
国家自然科学基金项目(32101595)。
关键词
植物群落
Β多样性
环境过滤
扩散限制
气候
敦煌北山及马鬃山
plant communities
βdiversity
environmental filtration
diffusion restriction
climate
in Beishan and Manongshan of Dunhuang
