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| 西藏那曲地区维管植物组成、结构及地理成分研究 |
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付本艺1,2,3, 张杨舒1,2,3, 袁春艳1,2,3, 侯璐瑶1,2,3, 罗大庆1,2,3, 屈兴乐1,2,3
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1.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;2.西藏农牧大学 高原生态研究所，西藏 林芝 860000;3.西藏高原森林生态教育部重点实验室，西藏 林芝 860000
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| 摘要: |
| 【目的】阐明西藏那曲地区维管植物区系特征、地理成分及优势类群的高寒适配性，为区域维管植物多样性保护、高寒生态系统稳定管理及资源可持续利用提供理论支撑。【方法】基于那曲11县（区）8年野外调查数 据，结合植物区系地理学经典方法，分析其物种组成、生活型谱、叶指标、地理成分及优势类群。【结果】那曲地区维管 植物共81科368属1 264种，被子植物占绝对主导地位；生活型以地面芽植物为主（75.15%）；叶指标呈现草质叶 （91.22%）、小/微型叶（90.82%）、复叶（82.75%）占优的特征；科级大科与较大科贡献68.83%物种，属级单种属最多且大属贡献显著；地理成分上，科级世界分布科占比居首，温带分布科为重要组成部分，属级温带属占绝对优势 （77.45%）、热带属极少（7.07%）；筛选出14个优势科和14个优势属，多为世界/温带分布，适配低温干旱生境，是高寒生态系统核心类群。【结论】那曲地区维管植物科属以世界和温带分布型为主，适配寒旱生境，作为高寒草甸与荒漠生态系统的核心功能类群，对维持生态系统结构与功能至关重要。 |
| 关键词: 维管植物 物种组成 植物区系 西藏那曲 |
| DOI：10. 13207/j. jnwafu. 2026. 12. 016 |
| 分类号: |
| 基金项目:西藏农牧大学林学博士点（一期）项目（533325001）；2024 年西藏自治区生态质量样地监测项目（603324081）；2024 年度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（XZAJYBSYS-2024405） |
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| Composition，structure and geographical components of vascular plants in Nagqu Region，Xizang |
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FU Benyi1,2,3, ZHANG Yangshu1,2,3, YUAN Chunyan1,2,3, HOU Luyao1,2,3, LUO Daqing1,2,3, QU Xingle1,2,3
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1.National Forest Ecosystem Observation & Research Station of Linzhi Xizang，Linzhi，Xizang 860000，China;2.Institute of Plateau Ecology，Xizang Agricultural and Animal Husbandry University，Linzhi，Xizang 860000，China;3.Key Laboratory of Xizang Plateau Forest Ecology of Ministry of Education & National，Linzhi，Xizang 860000，China
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| Abstract: |
| 【Objective】This research aims to clarify the characteristics of the vascular plant flora，geographical components and the alpine adaptability of dominant groups in the Nagqu region，to provide theoretical support for the conservation of regional vascular plant diversity，the stable management of alpine ecosystems and the sustainable utilization of resources.【Method】Based on the field investigation data of 8 years from 11 counties （districts） in Nagqu，combined with the classic methods of flora geography，the species composition，lifestyle spectrum，leaf indicators，geographical components and dominant groups were analyzed.【Result】There are a total of 1 264 species of vascular plants in Nagqu region，belonging to 368 genera and 81 families，with angio-sperms being absolutely dominant. In terms of life-form，hemicryptophyte was the predominant type，accounting for 75.15%. The leaf indicators were characterized by the dominance of grass leaves（91.22%），small/micro leaves（90.82%），and compound leaves（82.75%）.At the family level，large and relatively large families con‐tributed 68.83% of the species，while at the genus level，monotypic genera were dominant and large genera made a significant contribution. In terms of geographical composition，the proportion of the cosmopolitan distri‐bution families ranked first at the family level，and the temperate distribution families accounted for a large pro‐portion. At the genus level，temperate genera were absolutely dominant（77.45%），whereas tropical genera were scarce（7.07%）.Fourteen dominant families and fourteen dominant genera were screened out. Most of them exhibited cosmopolitan distribution and temperate distribution features，and were adapted to low-tempera‐ture and arid habitats，being the core groups of alpine ecosystems.【Conclusion】The families and genera of vas‐cular plant in Nagqu region are mainly of cosmopolitan and temperate distribution types，and are adapted to cold and arid habitats. As the core functional group of alpine meadow and desert ecosystems，they are crucial for main‐taining the structure and function of the ecosystem. |
| Key words: vascular plants species composition plant flora Nagqu region,Xizang |
