摘要
西藏阿里西部札达县的象泉河河谷是青藏高原山地荒漠的主要分布区之一,但关于该地区的荒漠植被资料较为缺乏。为摸清该地区荒漠植被的本底,该研究基于2018–2023年在札达野外调查得到的42个荒漠样地,对札达荒漠植被进行分类和群落特征分析。结果发现:札达共计8种荒漠群系,包括温性灌木荒漠2种:变色锦鸡儿(Caragana versicolor)荒漠、中麻黄(Ephedra intermedia)荒漠;温性半灌木与草本荒漠6种:灌木亚菊(Ajania fruticulosa)荒漠、山岭麻黄(Ephedra gerardiana)荒漠、驼绒藜(Krascheninnikovia ceratoides)荒漠、心叶驼绒藜(Krascheninnikovia eversmanniana)荒漠、雀苣(Lactuca orientalis)荒漠和西藏绢蒿(Seriphidium thomsonianum)荒漠,其中变色锦鸡儿荒漠、山岭麻黄荒漠、心叶驼绒藜荒漠、雀苣荒漠和西藏绢蒿荒漠为新记录的荒漠类型。该地区的荒漠植被中共记录到维管植物82种,隶属于20科51属。其中,生活型以地面芽植物或多年生杂类草为主;水分生态类型以超旱生、典型旱生植物居多,包括所有荒漠植被的建群种和大部分伴生种,如灌木亚菊、中麻黄、驼绒藜、雀苣、心叶驼绒藜、燥原荠(Stevenia canescens)、盐生草(Halogeton glomeratus)等;区系地理成分以中亚亚洲中部成分为多,其次为青藏高原和东古北极成分。研究结果为了解该区域荒漠植被资源现状及其分布特征和开展区域生物多样性保护等相关研究提供基础数据和资料。
The Xiangquan River valley of Zanda in the western Ngari Prefecture is one of the main distribution areas of the mountainous desert on the Qingzang Plateau,but there is a lack of data on the background of desert vegetation in this area.Based on the field survey of 42 desert plots in Zanda County,Nagri,Xizang from 2018–2023,this study analyzed the classification and community characteristics of desert vegetation in the Xiangquan River basin.The results showed that there were 8 desert alliances in Zanda County,Xizang,including two temperate shrub deserts:Caragana versicolor desert and Ephedra intermedia desert,and six temperate semi-shrub and herbaceous deserts,Ajania fruticulosa desert,Ephedra gerardiana desert,Krascheninnikovia ceratoides desert,Krascheninnikovia eversmanniana desert,Lactuca orientalis desert and Seriphidium thomsonianum desert.Notably,five desert alliances(C.versicolor,E.gerardiana,K.eversmanniana,L.orientalis,and S.thomsonianum deserts)are newly recorded desert types.A total of 82 species of vascular plants belonging to 51 genera and 20 families were recorded.Among them,the life forms were mainly hemicryptophytes and perennial forbs.The water ecological type were mostly hyperxerophytic and typical xerophytes,including most of the edificators and companions of desert vegetation,such as Ajania fruticulosa,Ephedra intermedia,Krascheninnikovia ceratoides,Lactuca orientalis,and Krascheninnikovia eversmanniana.The Central Asia-Middle Asia component is the most important component of the geographical floristic type,followed by the Qingzang Plateau and the Eastern Paleoarctic.This study provides basic data and information for understanding the status and distribution of desert vegetation resources in this region,and for classifying the desert vegetation types in the Qingzang Plateau for better regional biodiversity conservation.
作者
王世松
曲孝云
董劭琼
李佳鸿
杨琦
侯满福
赵利清
郭柯
刘长成
胥晓
WANG Shi-Song;QU Xiao-Yun;DONG Shao-Qiong;LI Jia-Hong;YANG Qi;HOU Man-Fu;ZHAO Li-Qing;GUO Ke;LIU Chang-Cheng;XU Xiao(College of Life Sciences,China West Normal University,Nanchong,Sichuan 637000,China;Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Environment and Resources,Guangxi Normal University,Guilin,Guangxi 541004,China;School of Ecology and Environment,Inner Mongolia University,Hohhot 010021,China)
出处
《植物生态学报》
北大核心
2025年第5期801-812,共12页
Chinese Journal of Plant Ecology
基金
第二次青藏高原综合科学考察研究(2019QZKK0301)
中国科学院战略性先导科技专项(XDA19050402)。
关键词
青藏高原
山地荒漠
温性灌木荒漠
温性半灌木与草本荒漠
水分生态类型
Qingzang Plateau
montane desert
temperate shrub desert
temperate semi-shrub and herb desert
ecological type for water
