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中国沙漠 ›› 2025, Vol. 45 ›› Issue (4): 305-313.DOI: 10.7522/j.issn.1000-694X.2025.00034

• • 上一篇    

差巴嘎蒿( Artemisia halodendron )和小叶锦鸡儿( Caragana microphylla )物候的气候响应

白浩江1,4(), 罗永清1,4(), 程莉1,4, 汪正蛟一2,3,4   

  1. 1.中国科学院西北生态环境资源研究院,奈曼沙漠化研究站,甘肃 兰州 730000
    2.中国科学院西北生态环境资源研究院,乌拉特荒漠草原研究站,甘肃 兰州 730000
    3.中国科学院西北生态环境资源研究院,甘肃省寒区旱区逆境生理与生态重点实验室,甘肃 兰州 730000
    4.中国科学院大学,北京 100049
  • 收稿日期:2024-09-18 修回日期:2025-02-25 出版日期:2025-07-20 发布日期:2025-08-18
  • 通讯作者: 罗永清
  • 作者简介:白浩江(1997—),男,内蒙古巴彦淖尔人,硕士研究生,主要从事恢复生态学研究。E-mail: baihaojiang22@mails.ucas.ac.cn
  • 基金资助:
    甘肃省自然科学基金项目(23JRRA663)

The phenological responses of the dominant shrubs Artemisia halodendron and Caragana microphylla in the Horqin Sandy Land to climate change

Haojiang Bai1,4(), Yongqing Luo1,4(), Li Cheng1,4, Zhengjiaoyi Wang2,3,4   

  1. 1.Naiman Desertification Research Station /, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.Urat Desert-Grassland Research Station /, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.Gansu Province Key Laboratory of Stress Physiology and Ecology in Cold and Arid Region, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    4.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2024-09-18 Revised:2025-02-25 Online:2025-07-20 Published:2025-08-18
  • Contact: Yongqing Luo

摘要:

植物物候可敏感、精确地反映气候变化,反映生态系统对环境变化的响应和适应。为探究半干旱沙质草地优势灌木物候对气候变化的响应,通过定位观测得到了科尔沁沙地2种优势灌木差巴嘎蒿(Artemisia halodendron)和小叶锦鸡儿(Caragana microphylla) 的物候时序变化,同时收集同期气候数据,采用偏最小二乘回归(PLS)方法,分析了该区域优势灌木物候对气候变化的响应。结果表明:2005—2019年,科尔沁沙地多数月份呈现出气温、降水、太阳辐射增加的趋势。随着时间的推移,2种优势灌木的展叶期显著提前(P<0.05),秋季叶变色、落叶期显著推迟(P<0.05),生长季延长(P<0.05)。温度的变化使差巴嘎蒿和小叶锦鸡儿展叶期提前,秋季叶变色、落叶期推迟,生长季延长。降水变化使其秋季落叶推迟,生长季延长。太阳辐射对优势灌木差巴嘎蒿和小叶锦鸡儿关键物候期的影响与温度和降水作用方向相反,即展叶期推迟,秋季叶变色、落叶期提前,生长季缩短。温度和降水是半干旱沙质草地优势灌木差巴嘎蒿和小叶锦鸡儿展叶期提前,秋季叶变色、落叶期推迟,生长季延长的关键气候因子。

关键词: 物候, 科尔沁沙地, 气候变化, 偏最小二乘回归, 优势灌木

Abstract:

Plant phenology is one of the most sensitive and accurate indicators of climate change, and it can reflect the response and adaptation of ecosystems to environmental changes. In order to explore the meteorological driving factors of dominant shrub phenological change in semi-arid sandy grassland. We collected the phenological observation data and corresponding meteorological data from 2005 to 2019 recorded by Naiman Desertification Research Station. We used the partial least squares regression (PLS) method to analyze the effects of meteorological variables, such as temperature, precipitation and solar radiation on shrub phenology. The results showed that: temperature, precipitation, and solar radiation increased in most months in Horqin Sandy Land during 2005-2019. The leaf unfolding of two dominant shrubs was significantly advanced (P<0.05), leaf discoloration and senescence was significantly delayed (P<0.05), the length of growing season was significantly prolonged (P<0.05). Over the past 15 years, the change of temperature made Artemisia halodendron and Caragana microphylla show a trend of earlier leaf unfolding, later leaf discoloration, later senescence and longer growing season. The change of precipitation made the later senescence and longer growing season of A. halodendron and C. microphylla. With the increase of solar radiation, A. halodendron and C. microphylla showed a trend of later leaf unfolding, earlier leaf discoloration,earlier senescence and shorter growing season. In conclusion, the effects of solar radiation on A. halodendron and C. microphylla were in the opposite direction to the effects of temperature and precipitation. Temperature and precipitation were the key meteorological factor to advance the leaf unfolding, delay the leaf discoloration and senescence, as well as prolong the length of growing season of A. halodendron and C. microphylla in the semi-arid sandy grassland.

Key words: phenology, Horqin Sandy Land, climate change, partial least squares regression, dominant shrubs

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