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植物研究 ›› 2024, Vol. 44 ›› Issue (2): 168-179.doi: 10.7525/j.issn.1673-5102.2024.02.002

• 系统与进化 • 上一篇    下一篇

气候变化背景下青藏高原特有种唐古特红景天的地理分布格局预测

李小莉1,2, 苏旭1,2,3, 王东4, 刘玉萍1,2,3(), 陈金元1,2, 孙成林1,2   

  1. 1.青海师范大学生命科学学院,西宁 810008
    2.青海师范大学青海省青藏高原生物多样性形成机制与综合利用重点实验室,西宁 810008
    3.青海师范大学高原科学与可持续发展研究院,西宁 810016
    4.青海师范大学地理科学学院,西宁 810008
  • 收稿日期:2023-06-05 出版日期:2024-03-20 发布日期:2024-03-11
  • 通讯作者: 刘玉萍 E-mail:lyp8527970@126.com
  • 作者简介:李小莉(1998—),女,硕士研究生,主要从事高山植物遗传多样性与系统进化。
  • 基金资助:
    国家自然科学基金(32160297);第二次青藏高原综合科学考察研究项目(2019QZKK0502)

Prediction of the Geographical Distribution Pattern of Rhodiola tangutica(Crassulaceae) under the Background of Climate Change, an Endemic Species from the Qinghai-Tibet Plateau

Xiaoli LI1,2, Xu SU1,2,3, Dong WANG4, Yuping LIU1,2,3(), Jinyuan CHEN1,2, Chenglin SUN1,2   

  1. 1.School of Life Sciences,Qinghai Normal University,Xining 810008
    2.Key Laboratory of Biodiversity Formation Mechanism and Comprehensive Utilization of the Qinghai-Tibet Plateau in Qinghai Province,Qinghai Normal University,Xining 810008
    3.Academy of Plateau Science and Sustainability,Qinghai Normal University,Xining 810016
    4.School of Geographical Science,Qinghai Normal University,Xining 810008
  • Received:2023-06-05 Online:2024-03-20 Published:2024-03-11
  • Contact: Yuping LIU E-mail:lyp8527970@126.com

摘要:

为探究唐古特红景天(Rhodiola tangutica)在青藏高原的潜在适宜分布及其生态适应性,基于唐古特红景天青藏高原38个分布位点以及当前和未来5个时期7个环境因子,利用MaxEnt模型构建唐古特红景天分布与环境因子的关系模型,模拟和验证当前时期1970—2000年与SSP245情景模式下未来4个时期(2030s、2050s、2070s和2090s)的潜在地理分布格局。结果表明:(1)海拔(Alt)和最干月份降水量(Bio14)是影响唐古特红景天地理分布格局的最主要生态因子,贡献率分别为89.3%和4.9%。(2)当前气候背景下,唐古特红景天在青藏高原地区的适宜分布区总面积为195.21×104 km2,主要位于青海南部和东北部、四川西北部及西藏中部等。(3)与当前时期相比,未来4个时期唐古特红景天的适宜分布区总面积变化不太明显,但高适宜区面积却有所增加,呈现出向青藏高原中部集中分布的趋势。

关键词: 唐古特红景天, 气候变化, 潜在分布区预测, 最大熵模型

Abstract:

To explore the potential suitable distribution and ecological adaptability of Rhodiola tangutica on the Qinghai-Xizang Plateau, based on 38 distribution sites of Rhodiola tangutica across the plateau and seven environmental factors across current and future five periods, a relationship model between the distribution of Rhodiola tangutica and environmental factors was constructed using the MaxEnt model. The potential geographical distribution patterns for the current period(1970-2000) and four future periods(2030s, 2050s, 2070s and 2090s) under the SSP245 scenario were simulated and verified. The findings revealed that: (1)Altitude(Alt) and precipitation of the driest month(Bio14) were the most important ecological factors influencing the geographical distribution of Rhodiola tangutica, contributing rates of 89.3% and 4.9%, respectively. (2)under the current climatic context, the total suitable distribution area of Rhodiola tangutica on the Qinghai-Xizang Plateau was approximately 195.21×10? km2, predominantly situated in the southern and northeastern parts of Qinghai, northwestern Sichuan, and central Xizang. (3)compared with the current period, the total suitable distribution area of Rhodiola tangutica in the next four periods would not change obviously; however, the area of high suitability would increase, with a tendency of concentrated distribution to the central Qinghai-Xizang Plateau.

Key words: Rhodiola tangutica, Climate change, Potential distribution prediction, Maximum entropy model

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