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干旱区地理 ›› 2025, Vol. 48 ›› Issue (9): 1578-1588.doi: 10.12118/j.issn.1000-6060.2024.657 cstr: 32274.14.ALG2024657

• 植物生态 • 上一篇    下一篇

基于MaxEnt模型预测气候变化下准噶尔沙蒿(Artemisia songarica)在新疆的潜在分布

李文华1,2,3,4(), 李生宇1,2,3,4(), 徐新文1,2,3,4, 苗佳敏1,2,3,4, 吕振涛1,2,3,4   

  1. 1.中国科学院新疆生态与地理研究所国家荒漠-绿洲生态建设工程技术研究中心/干旱区生态安全与可持续发展全国重点实验室,新疆 乌鲁木齐 830011
    2.中国科学院新疆生态与地理研究所莫索湾沙漠研究站,新疆 石河子 832000
    3.中国科学院新疆生态与地理研究所塔克拉玛干沙漠研究站,新疆 库尔勒 841000
    4.中国科学院大学,北京 100049
  • 收稿日期:2024-10-26 修回日期:2024-12-12 出版日期:2025-09-25 发布日期:2025-09-17
  • 通讯作者: 李生宇(1975-),男,博士,正高级工程师,主要从事风沙地貌与风沙工程方面的研究. E-mail: oasis@ms.xjb.ac.cn
  • 作者简介:李文华(1998-),女,硕士研究生,主要从事风沙地貌与风沙工程方面的研究. E-mail: liwenhua22@mails.ucas.ac.cn
  • 基金资助:
    第三次新疆综合科学考察课题(2021xjkk0305);新疆交投科研项目(XJJTZKX-FWCG-202401-0043)

Predicting the potential distribution of Artemisia songarica in Xinjiang under climate change based on the MaxEnt model

LI Wenhua1,2,3,4(), LI Shengyu1,2,3,4(), XU Xinwen1,2,3,4, MIAO Jiamin1,2,3,4, LYU Zhentao1,2,3,4   

  1. 1. National Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, National Engineering Technology Research Center for Desert-0asis Ecological Construction, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
    2. Mosuowan Desert Research Station, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Shihezi 832000, Xinjiang, China
    3. Taklimakan Desert Research Station, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Korla 841000, Xinjiang, China
    4. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2024-10-26 Revised:2024-12-12 Published:2025-09-25 Online:2025-09-17

摘要:

作为荒漠和半荒漠地区的主要植物,准噶尔沙蒿(Artemisia songarica)在维持新疆地区生态系统平衡方面发挥着重要作用。在全球气候变化的背景下,研究其对气候变化的响应,对于区域生态系统的稳定性至关重要。基于最大熵(MaxEnt)模型,对准噶尔沙蒿在新疆地区当代及未来(2041—2060年和2081—2100年)的潜在适生区分布进行了预测,并分析了驱动其分布格局的主要环境因素。 结果表明:(1) 在当代气候下,准噶尔沙蒿的适生区主要集中在整个北疆区域及南疆沙漠边缘的绿洲地区,适生面积约为57.95×104 km2,主要的驱动因素包括人类足迹指数(hfp)、降水量季节变异系数(bio15)、最干月降水量(bio14)、等温性(bio3)和昼夜温差月均值(bio2)。(2) 去除人类影响因素后,准噶尔沙蒿的潜在分布区域显著扩大、适生等级提高,且适宜生境分布更为连贯,表明人类活动对其生存发展产生了负面影响。(3) 未来气候条件下,准噶尔沙蒿的潜在适宜生境与当代分布基本一致;在低辐射强迫情景(SSP126)和中等稳定情景(SSP245)下,其适生区先扩张后略有缩小,扩张区域主要位于哈密市北部边缘以及和田地区和喀什地区南部边缘,削减区域则主要位于北疆准噶尔盆地边缘和南疆的绿洲地带;而在高强迫情景(SSP585)下,其适生区则沿当代适生区的边缘向东扩张;在未来气候变化下适宜生境的分布中心向低纬度迁移,迁移距离与辐射胁迫强度成正比。

关键词: 准噶尔沙蒿, MaxEnt模型, 人类足迹指数, 潜在适生区, 气候变化

Abstract:

Artemisia songarica is a crucial species in desert and semi-desert ecosystems, significantly contributing to the maintaince of ecological balance in Xinjiang of China. Using the maximum entropy (MaxEnt) model, this study predicts the potential suitable habitat distribution of A. songarica under current and future climate scenarios (2041—2060 and 2081—2100) and analyzes the main environmental factors driving its distribution pattern. The key findings are as follow: (1) Under current climatic conditions, the potential suitable habitats of A. songarica are primarily located in northern Xinjiang and along the oasis margins of the dessert in southern Xinjiang, covering approximately 57.95×104 km2. The main environmental determinants include the human footprint index (hfp), precipitation seasonality (bio15), precipitation of the driest month (bio14), isothermality (bio3), and the mean diurnal temperature range (bio2). (2) Excluding human influence factors, a significant expansion of the species’ potential distribution, with an increase in habitat suitability and more consistent habitat connectivity is observed. This suggests that human activities have a detrimental impact on survival and development. (3) Under future climatic scenarios, the potential distribution of suitable habitats largely overlaps with the current distributions. In low radiative forcing scenarios (SSP126) and moderately stable scenarios (SSP245), suitable habitats initially expand and then experience slight contraction. Expansion primarily occurs along the northern edge of Hami City and the southern borders of Hotan and Kashgar Prefectures, while contraction areas are concentrated in the Junggar Basin and southern oasis margins. Under a high radiative forcing scenario (SSP585), suitable habitats expand eastward along the current distribution boundary. Additionally, the centroid of potential suitable habitat is projected to shift toward lower latitudes, with migration distance positively correlated with the intensity of radiative forcing.

Key words: Artemisia songarica, MaxEnt model, human footprint, potential suitable habitat, climate change