蒙古沙冬青群落组成与结构研究
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摘要
蒙古沙冬青(Ammopiptanthus.mongolicus)属于古老的第三纪孑遗植物,具有重要学术研究价值.蒙古沙冬青群落是分布在内蒙古西部的典型荒漠群落类型之一.本文通过对阿拉善左旗蒙古沙冬青群落植被状况的调查分析,结果发现,沙冬青群落以藜科、蒺藜科、禾本科、豆科、菊科等植物为主.在群落内部,植物生活型以草本植物为主,占64. 8%;灌木植物次之,占32. 4%.植物生态型主要为旱生植物,占59. 5%.随着海拔高度增加,蒙古沙冬青群落的物种多样性和植被覆盖度逐渐减少.受气候变化和地理环境因素影响,蒙古沙冬青种群呈现老龄化,分布面积有缩小趋势,急需加强基础研究和保护管理.
The community of Ammopiptanthus.mongolicus is a kind of desert communities. The species,life form,ecotype,density,and coverage of vegetation characteristics of A. mongolicus community in Alasan Left Banner,Inner Mongolia was investigated and analyzed in this paper. The results showed the species numbers of Chenopodiaceae,Zygophyllaceae,Gramineae,Leguminosae and Compositae family was higher in the community. The plant ecotype of A. mongolicus community was mainly the xerophyte dominated by shrubs and semi-shrubs,and the life-form were mainly perennial herbs. Species richness and vegetation coverage in communities decreased with elevation rising. The composition and structure of A. mongolicus community were affected by topography,soil and water conditions.
The community of Ammopiptanthus.mongolicus is a kind of desert communities. The species,life form,ecotype,density,and coverage of vegetation characteristics of A. mongolicus community in Alasan Left Banner,Inner Mongolia was investigated and analyzed in this paper. The results showed the species numbers of Chenopodiaceae,Zygophyllaceae,Gramineae,Leguminosae and Compositae family was higher in the community. The plant ecotype of A. mongolicus community was mainly the xerophyte dominated by shrubs and semi-shrubs,and the life-form were mainly perennial herbs. Species richness and vegetation coverage in communities decreased with elevation rising. The composition and structure of A. mongolicus community were affected by topography,soil and water conditions.
引文
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[19]张进虎,廖空太,李德禄,等.几种不同生境条件下天然沙冬青种群分布格局与特征[J].干旱区资源与环境,2010,24(11):151-154.
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[23]TILMAN D,DOWNIG JA.Biodiversity and stability in grassland[J].Nature,1994,(367):363-365.
[2]马松梅,张明理,陈曦.沙冬青属植物在亚洲中部荒漠区的潜在地理分布及驱动因子分析[J].中国沙漠,2012,32(5):1302-1303.
[3]周宜君,刘春兰,冯金朝,等.沙冬青抗旱、抗寒机理的研究进展[J].中国沙漠,2001,21(3):312-316.
[4]郭生祥,刘志银,郝昕.沙冬青的研究进展[J].甘肃林业科技,2005,30(4):5-8.
[5]ZHOU Y,GAO F,LIU R,FENG J,et al.De novo sequencing and analysis of root transcriptome using 454 pyrosequencing to discover putative genes associated with drought tolerance in Ammopiptanthus mongolicus[J].BMC Genomics,2012,(13):266-278.
[6]LIU M Q,SHI J,LU C F.Identification of stress-responsive genes in Ammopiptanthus Mongolicus using ESTs generated from cold-and drought-stressed seedlings[J].BMC Plant Biology,2013,(13):88.
[7]ZYCH M,STPICZYNSKA M.Neither protogynous nor obligatory out-crossed:pollination biology and breeding system of the European Red List Fritillaria meleagris L.(Liliaceae)[J].Journal of Plant Biology,2012,14(2):285-294.
[8]WANG W,CHEN JJ,LI JN,et al.Extraordinary accumulations of antioxidants in Ammopiptanthus mongolicus(Leguminosae)and Tetraena mongolica(Zygophyllaceae)distributed in extremely stressful environments[J].Botanical Study,2007,(48):55-61.
[9]何恒斌,张惠娟,贾桂霞.磴口县沙冬青种群结构和空间分布格局的研究[J].林业科学,2006,42(10):13-18.
[10]麦尔哈巴·阿布拉,刘博,李征珍,等.新疆沙冬青植物群落特征研究[J].中央民族大学学报(自然科学版),2015,24(3):81.
[11]刘冉,周宜君.沙冬青种质资源与抗旱基因研究[D].北京:中央民族大学,2012.
[12]YUAN W J,YU Y,YUE YD,et al.Use of infrared thermal imaging to diagnose health of Ammopiptanthus mongolicus in northwestern China[J].Journal of Forestry Research,2015,26(3):605-612.
[13]YU H Q,YONG T M,LI H J,et al.Overexpression of a phospholipase Dαgene from Ammopiptanthus nanus enhances salt tolerance of phospholipase Dα1-deficient Arabidopsis mutant[J].Planta,2015,242(6):1495-1509.
[14]DENG LQ,YU HQ,LIU YP,et al.Heterologous expression of antifreeze protein gene An AFP from Ammopiptanthus nanus enhances cold tolerance in Escherichia coli and tobacco[J].Gene,2014,(539):132-140.
[15]YU HQ,ZHANG YY,YONG TM et al.Cloning and functional validation of molybdenum cofactor sulfurase gene from Ammopiptanthus nanus[J].Plant Cell,2015,(34):1165-1176.
[16]GU LJ,CHENG HM.Isolation,molecular cloning and characterization of a cold responsive gene,Am DUF1517,from Ammopiptanthus mongolicus[J].Plant Cell Tissue Organ Cult,2014,(117):201-211.
[17]GUO HM,LI ZC,ZHOU ML et al.c DNA-AFLP analysis reveals heat shock proteins play important roles in mediating cold,heat,and drought tolerance in Ammopiptanthus mongolicus[J].Funct Integr Genomics,2014,14(1):127-133.
[18]冯金朝,周宜君,周海燕,等.沙冬青对土壤水分变化的生理响应[J].中国沙漠,2001,21(3):223-226.
[19]张进虎,廖空太,李德禄,等.几种不同生境条件下天然沙冬青种群分布格局与特征[J].干旱区资源与环境,2010,24(11):151-154.
[20]中国植物志编辑委员会.中国植物志[M].北京:科学出版社,1997.
[21]唐志尧,方精云.植物物种多样性的垂直分布格局[J].生物多样性,2004,12(1):20-28.
[22]LOREAU M,NEEM S,INCHAUSTI P,et al.Biodiversity and ecosystem functioning:current knowledge and future challenges[J].Science,2001,(29):804-808.
[23]TILMAN D,DOWNIG JA.Biodiversity and stability in grassland[J].Nature,1994,(367):363-365.