| 引用本文: | 李 蕾, 丁 甲, 唐逸芸, 杨宏玉, 冯金朝, 石 莎.蒙古沙冬青功能性状及其环境适应特征研究[J].广西植物,2025,45(1):80-94.[点击复制] |
| LI Lei, DING Jia, TANG Yiyun, YANG Hongyu, FENG Jinchao, SHI Sha.Functional traits and environmental adaptive characteristics of Ammopiptanthus mongolicus[J].Guihaia,2025,45(1):80-94.[点击复制] |
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| 蒙古沙冬青功能性状及其环境适应特征研究 |
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李 蕾, 丁 甲, 唐逸芸, 杨宏玉, 冯金朝, 石 莎*
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中央民族大学 生命与环境科学学院, 北京 100081
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| 摘要: |
| 为探究我国西北荒漠地区珍稀濒危物种蒙古沙冬青(Ammopiptanthus mongolicus)的叶功能性状及其在气候变化下对环境因子的适应特征,该研究基于自适应帕尔默干旱指数(self-calibrating Palmer Drought Severity Index,scPDSI),采用回归分析法和单因素方差分析法等对内蒙古、宁夏、甘肃沙砾质生境的天然蒙古沙冬青功能性状进行了测定和分析。结果表明:(1)蒙古沙冬青种内变异系数为7.06%～39.54%,叶形态及其结构组成变异程度较大。(2)研究区域趋于湿润化,蒙古沙冬青叶干物质含量、叶厚、叶柄长度、叶柄干重、叶柄鲜重、蒸腾速率显著性减小(P<0.05),叶鲜重、叶长、叶形指数、水分利用效率显著性增大(P<0.05)。(3)蒙古沙冬青叶片功能性状受环境条件影响显著,主要环境因子包括土壤砂粒含量、年均风速、土壤黏粒含量、年均潜在蒸散发量等。(4)蒙古沙冬青植物性状网络(plant trait networks,PTNs)以整体松散、局部聚集的方式适应沙质地生境,而在砾质地生境中以性状协同的方式生长。综上认为,蒙古沙冬青在不同环境条件下表现为不同的性状特征及适应策略,其表现受环境因子的影响显著。该研究为蒙古沙冬青的环境适应机制提供了科学依据,并为制定其保护和恢复策略提供了参考。 |
| 关键词: 蒙古沙冬青, 干旱胁迫, 功能性状, 环境因子, 植物性状网络 |
| DOI：10.11931/guihaia.gxzw202406033 |
| 分类号:Q948.1 |
| 文章编号:1000-3142(2025)01-0080-15 |
| 基金项目:国家自然科学基金(31570407); 农业遗产保护与利用项目(2021XSTD02); 中央民族大学2023年度“道中华”建设专项(104-0220050329)。 |
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| Functional traits and environmental adaptive characteristics of Ammopiptanthus mongolicus |
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LI Lei, DING Jia, TANG Yiyun, YANG Hongyu, FENG Jinchao, SHI Sha*
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College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China
College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China
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| Abstract: |
| To investigate the adaptive characteristics of Ammopiptanthus mongolicus, a rare and endangered species native to the desert regions of Northwest China, under the context of climate change, we conducted a comprehensive analysis of the functional traits of natural A. mongolicus populations in gravelly habitats across Inner Mongolia, Ningxia Hui Autonomous Region, and Gansu Province. Based on self-calibrating Palmer Drought Severity Index( scPDSI ), using regression analysis and one-way ANOVA, we assessed the drought conditions of the study sites and explored the functional traits of A. mongolicus and their adaptive responses to environmental factors. The study employed other methods, including GPS-based measurements of geographic coordinates and altitude, along with assessments of soil moisture, leaf structural traits, physiological and ecological indicators, and growth parameters. The results were as follows:(1)The intraspecific coefficient of variation in A. mongolicus ranged from 7.06% to 39.54%, with considerable variability observed in leaf morphology and structural composition.(2)As the study regions became increasingly humid, significant decreases were observed in leaf dry matter content, leaf thickness, petiole length, petiole dry weight, petiole fresh weight, and transpiration rate(P<0.05), while significant increases were found in leaf fresh weight, leaf length, leaf shape index, and water use efficiency(P<0.05).(3)The leaf functional traits of A. mongolicus were significantly influenced by environmental conditions, with key factors including soil sand content, average annual wind speed, soil clay content, and average annual potential evapotranspiration.(4)The plant trait networks(PTNs)of A. mongolicus exhibited a loosely structured yet locally clustered configuration in sandy habitats, while in gravelly habitats, traits were more coordinated. These findings suggest that the development of leaf traits in A. mongolicus is a complex process shaped by the interaction of multiple environmental factors. A. mongolicus adapts to different habitats by modulating trait modules, either coordinating traits as a whole or differentiating them into distinct modules to mitigate water stress in arid environments. In summary, A. mongolicus demonstrates distinct functional traits and adaptive strategies under varying environmental conditions, with these traits significantly influenced by environmental factors. This study provides scientific basis for the mechanisms of environmental adaptation in A. mongolicus and serves as a reference for formulating conservation and restoration strategies for this endangered species. |
| Key words: Ammopiptanthus mongolicus, drought stress, functional traits, environmental factors, plant trait networks |
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