Responses of Plant Diversity and Productivity Differentiation to Climate in the Alpine Grassland of Northern Tibet

doi:10.11733/j.issn.1007-0435.2026.10.027

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (10): 3817-3827.DOI: 10.11733/j.issn.1007-0435.2026.10.027

Responses of Plant Diversity and Productivity Differentiation to Climate in the Alpine Grassland of Northern Tibet

CAO Jia-ning^1,2, WANG Zhi-cheng^1,2, WANG Wen-bi^1,2, TIAN Miao^1,2, CAO Ya-hong^1,2, HAI Yan^1,2, WANG Yong-jie^1,2, SU Jun-hu^1,2,3

1. College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
2. Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
3. Gansu Qilian Mountain Grassland Ecosystem Field Scientific Observatory, Lanzhou, Gansu Province 730070, China

Received:2026-01-30 Revised:2026-03-29 Published:2026-10-10

藏北高寒草地植物多样性和生产力分异对气候的响应

曹家宁^1,2, 王志成^1,2, 王文碧^1,2, 田淼^1,2, 曹雅虹^1,2, 海岩^1,2, 王泳杰^1,2, 苏军虎^1,2,3

1. 甘肃农业大学草业学院/草业生态系统教育部重点实验室, 甘肃兰州 730070;
2. 甘肃农业大学-新西兰梅西大学草地生物多样性研究中心, 甘肃兰州 730070;
3. 甘肃省祁连山草原生态系统野外科学观测研究站, 甘肃兰州 730070

通讯作者: 王泳杰, E-mail: 849100889@qq.com;苏军虎, E-mail: sujh@gsau.edu.cn
作者简介:曹家宁（2001-），女，汉族，甘肃定西人，硕士研究生，主要从事草地生态方面研究，E-mail：1029833974@qq.com
基金资助:
中央财政林业草原生态保护恢复（国家公园）资金项目《退化草地生态修复成效监测及技术应用》（NLCHT-2024-0703）资助

Abstract

Abstract: In order to clarify the relationship between plant diversity and productivity and its climate response characteristics of different alpine grassland types in the northern Tibetan Plateau， this study took the alpine meadow， alpine typical steppe and alpine desert steppe in this region as the research objects， and discussed the relationship between plant diversity and productivity of three grassland types， as well as the response path of plant diversity and productivity， soil nutrients and water content to annual average precipitation and annual average temperature. The results showed that the Shannon-Wiener index and Simpson index of alpine typical steppe were the best， the species richness and vegetation coverage of alpine meadow were the highest， the community evenness of alpine desert steppe was the highest and the productivity was the lowest. There was a significant positive correlation between plant diversity and aboveground biomass in alpine desert steppe and alpine typical steppe. The correlation between plant diversity and aboveground biomass in alpine meadow was not significant but showed a positive trend. The average annual precipitation had a significant negative effect on the productivity of alpine desert steppe， but had no significant effect on alpine meadow. The productivity of alpine typical grassland was regulated by precipitation and plant diversity. This study revealed the differences in the response of different alpine grassland ecosystems to climate change， and provided theoretical support for grassland zoning management in the northern Tibetan Plateau.

Key words: Northern Tibet Plateau, Alpine grassland, Species diversity, Productivity, Climate impact

摘要： 为明确藏北高原不同高寒草地类型植物多样性与生产力的关系及其气候响应特征，本研究以该区域高寒草甸、高寒典型草原和高寒荒漠草原为对象，探讨3种草地类型植物多样性与生产力的关系，以及植物多样性与生产力、土壤养分及含水量对年均降水量、年均温的响应特征。结果表明：高寒典型草原香农-维纳指数和辛普森指数最优，高寒草甸物种丰富度与植被盖度最高，高寒荒漠草原群落均匀度最高、生产力最低。高寒荒漠草原和高寒典型草原植物多样性与地上生物量呈显著正相关，高寒草甸植物多样性与地上生物量相关性不显著但呈正向趋势。年均降水对高寒荒漠草原生产力呈显著负向作用，对高寒草甸无显著影响；高寒典型草原生产力受降水与植物多样性共同调控。本研究揭示了不同高寒草地生态系统对气候变化的响应差异，为藏北高原草地分区管理提供了理论支撑。

关键词: 藏北高原, 高寒草地, 植物多样性, 生产力, 气候影响

CLC Number:

S812

CAO Jia-ning, WANG Zhi-cheng, WANG Wen-bi, TIAN Miao, CAO Ya-hong, HAI Yan, WANG Yong-jie, SU Jun-hu. Responses of Plant Diversity and Productivity Differentiation to Climate in the Alpine Grassland of Northern Tibet[J]. Acta Agrestia Sinica, 2026, 34(10): 3817-3827.

曹家宁, 王志成, 王文碧, 田淼, 曹雅虹, 海岩, 王泳杰, 苏军虎. 藏北高寒草地植物多样性和生产力分异对气候的响应[J]. 草地学报, 2026, 34(10): 3817-3827.

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Responses of Plant Diversity and Productivity Differentiation to Climate in the Alpine Grassland of Northern Tibet

藏北高寒草地植物多样性和生产力分异对气候的响应

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