| 摘要: |
| 叶绿素a是湖泊生态系统初级生产力的重要指标，其浓度变化反映水体的营养状态和生态健康。本研究基于2011-2024年查干淖尔水质及环境数据，采用相关性和冗余分析等方法，揭示叶绿素a浓度年际与年内变化特征及其关键驱动因子。结果表明：2011-2024年间，查干淖尔叶绿素a浓度年际变化稳定，夏季浓度最高，冬季次之，且自北向南递减。年际上，叶绿素a浓度与高锰酸盐指数负相关，与水量、水深、降水量、蒸发量和气温正相关，径流量对其浓度有促进作用。年内，叶绿素a浓度主要受总氮和气温影响，蒸发量和径流量在夏冬季影响显著。春季叶绿素a与冬季叶绿素a、气温和径流量正相关，夏季与气温正相关、与总氮负相关，秋季与夏季叶绿素a、气温、径流量正相关、与总氮、总磷和高锰酸盐指数负相关，冬季与气温、径流量和春季叶绿素a正相关。总的来说，查干淖尔叶绿素a浓度变化受到多种环境因素的共同作用，揭示湖泊生态系统对气候变化和水文条件的敏感性。 |
| 关键词: 叶绿素a 演变特征 驱动因素 查干淖尔 |
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| 基金项目:乌梁素海生态水文功能退化机制与调控（U2443225）、内蒙古黄河流域典型湖泊生态环境综合治理技术优化集成示范（2021GG0089）和内蒙古农业大学青年教师科研能力提升基金项目(BR220102)联合资助 |
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| The Evolution of Chlorophyll-a Concentration and Its Driving Mechanisms in Lake Chagannaoer, Inner Mongolia, 2011-2024 |
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zhanghao1, Shi Xiaohong1, Lu Junping1, Zhao Shengnan1, Sun Biao1, Hou Bo2, Zhang Lijie3
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1.The College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia: National Positioning Observation Research Station for Wuliangsuhai Wetland Ecosystem, Bayan Nur, Inner Mongolia.;2.Inner Mongolia Tumotezuoqi Water Bureau;3.河北省石家庄平山县冶河西路75号
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| Abstract: |
| Chlorophyll-a is an important indicator of primary productivity in lake ecosystems, and its concentration changes reflect the nutrient status and ecological health of the water. This study, based on water quality and environmental data from 2011 to 2024 for Chagannaoer, uses correlation and redundancy analysis to reveal the interannual and intra-annual variation characteristics of chlorophyll-a concentration and its key driving factors. The results show that between 2011 and 2024, the interannual variation of chlorophyll-a concentration in Chagannaoer was stable, with the highest concentrations in summer and the lowest in spring, and a decreasing trend from north to south. Interannually, chlorophyll-a concentration was negatively correlated with the permanganate index and positively correlated with water volume, water depth, precipitation, evaporation, and temperature. Runoff also had a promoting effect on its concentration. |
| Key words: Chlorophyll-a Evolution characteristics Mechanisms Chagannaoer |
