资源描述：
《黑龙江漠河兴安落叶松与樟子松树轮生长特性及其对气候的响》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、X植物生态学报2005,29(3)380～385ActaPhytoecologicaSinica黑龙江漠河兴安落叶松与樟子松树轮生长特性及其对气候的响应1,21,211,2王丽丽邵雪梅黄磊梁尔源(1中国科学院地理科学与资源研究所,北京100101)(2中国科学院青藏高原研究所,北京100085)摘要树木年轮(简称树轮)气候学是监测与重建全球气候变化的重要方法之一。针叶树树轮的生长能反馈出气温的变化,在高纬度地带尤为明显。该文分析了生长在我国最北部的兴安落叶松(Larixgmelinii)与樟子松(Pinussylvestrisvar.mongolica)的树
2、轮密度和宽度的特性。落叶松最大密度、晚材平均密度、早晚材宽度和轮宽都远高于樟子松。樟子松的所有密度变量的样本方差都明显高于兴安落叶松,宽度变量的样本方差却明显低于兴安落叶松。两树种密度变量的差值年表显著相关,宽度变量之间没有显著相关关系。落叶松与樟子松的晚材密度的形成受7、8月的最高温控制。另外,樟子松的晚材还与生长季节的长短相关。落叶松的年轮宽度对生长季节开始前的温度敏感,而樟子松的轮宽对气候变量没有很好的响应。结果表明,落叶松与樟子松的树轮最大密度都与生长季后期的温度显著相关,两树种的树轮信息对气候变化的重建有很大的潜力。关键词落叶松樟子松树轮密度树轮宽
3、度气候敏感性TREE-RINGCHARACTERISTICSOFLARIXGMELINIIANDPINUSSYLVESTRISVAR.MONGOLICAANDTHEIRRESPONSETOCLIMATEINMOHE,CHINA1,21,211,2WANGLi-LiSHAOXue-MeiHUANGLeiandLIANGEr-Yuan(1InstituteofGeographicalSciencesandNaturalResourcesResearch,ChineseAcademyofSciences,Beijing100101,China)(2Institut
4、eofTibetanPlateauResearch,ChineseAcademyofSciences,Beijing100085,China)AbstractDendroclimatologyisoneofthemostimportantmethodsformonitoringandreconstructingglobalcli2matechange.Variationsoftree-ringgrowthinconifersreflecttemperaturefluctuations,especiallyinhighlati2tuderegions.Lari
5、xgmeliniiandPinussylvestrisvar.mongolicaaretwomajorconiferspeciesinborealforestsinthenorthernmostregionofChina.Densitometrywasusedtoanalyzetree-ringwidthanddensityinthesetwospeciesinMohe,HeilongjiangProvince,China.Seventree-ringvariables(maximumdensity,minimumdensi2ty,meanearlywood
6、density,meanlatewooddensity,earlywoodwidth,latewoodwidthandannualringwidth)wereinvestigatedusingDendro2003andcomparedwithmeteorologicaldatafromaweatherstationnearthesamplingsite.Themaximumdensity,meanlatewooddensity,earlywoodwidth,latewoodwidthandannualring-widthinLarixgmeliniiwere
7、higherthanthoseinPinussylvestrisvar.mongolica.However,thevarianceamongallthedensitometricvariablesinPinussylvestrisvar.mongolicawassignificantlyhigherthanthatintheLarixgmelinii,butthevarianceoftotalringwidthwasdifferent.Bothresidualchronologiesoftree-ringdensityweresignificantlycor
8、relatedbutnosignificantcor
