海拔梯度对西藏墨脱县典型区域苔类植物多样性的影响  

The effect of altitude gradient on the diversity of liverworts in typical areas of Motuo County,Xizang

作　　者：司孟鑫 马和平 王彪 陈利 高智远 范冰冰 SI Meng-xin;MA He-ping;WANG Biao;CHEN Li;GAO Zhi-yuan;FAN Bing-bing(Xizang Key Laboratory of Forest Ecology in Plateau Area,National Key Station of Field Scientific Observation&Experiment,Institute of Xizang Plateau Ecology,Agriculture&Animal Husbandry University,Linzhi 860000,Xizang,China)

机构地区：[1]西藏农牧学院高原生态研究所,西藏高原森林生态教育部重点实验室,西藏林芝高山森林生态系统国家野外科学观测研究站,西藏林芝860000

出　　处：《兰州大学学报（自然科学版）》2024年第6期816-823,共8页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(32060264);西藏自治区科技计划项目(XZ202301ZY0041G);西藏农牧学院农业资源与环境学科建设项目(2023);西藏高原森林生态教育部重点实验室研究生创新计划项目(XZA-JYBSYS-2023-25)。

摘　　要：通过野外调查、标本采集、鉴定、文献资料收集、数据统计分析整理、统计出墨脱县苔类新名录.将采集的1300余份标本依据植被类型与海拔划分成13个生态群落,计算其ɑ与β多样性指数,墨脱苔类植物共计40科、68属、214种(包含4个变种和7个亚种);划分出6个优势科和7个优势属.墨脱苔类植物的多样性随海拔升高表现出“双峰”模式,即随海拔升高先上升后下降,继而再上升再下降,且存在更大高差内呈现多峰模式的可能,可能是由于青藏高原独特的地理环境、苔类植物的特殊形态结构及区别于藓类植物的环境响应机制.墨脱苔类植物的生态分布类型中,石生、土生和石土生等含水量和持水能力低的分布类型占比较大,随着海拔升高不断减少,其他生态分布类型则无明显变化.A new list of liverworts in Motuo County was compiled by means of field investigation,specimen identification,literature collection and data analysis.More than 1300 specimens collected were divided into 13 ecological communities according to vegetation types and altitudes.The alpha and beta diversity index of different communities were calculated,and the results sorted out and analyzed,with a total of 38 families,68 genera and 214 species(including 4 varieties and 7 subspecies);six dominant families and eight dominant genera were divided.The diversity in Motuo County showed a"bimodal"pattern with an elevation increase;that is,with increasing elevation,the diversity first increased and then decreased,and increased and then decreased,and there was a possibility of a multi-modal pattern within a larger elevation difference.It was speculated that the Qinghai-Xizang Plateau might be due to the unique geographical environment,the special morphology and structure of liverworts and the environmental Lagerstroresponse mechanism different from that of liverworts.Among the ecological distribution types,the distribution types of lithophytes,geozoans and lithophytes with a low water content and water holding capacity accounted for a relatively large proportion,but with the increase of altitude,the other ecological distribution types showed no significant change.

关 键 词：多样性 苔类植物 墨脱县 空间分布 垂直变化 

分 类 号：Q949.351[生物学—植物学] Q948.1