湖泊科学2025，Vol.37Issue(6)：1938-1947,10.DOI:10.18307/2025.0615
2011-2024年内蒙古查干淖尔叶绿素a演变及其驱动机制
The evolution of chlorophyll-a concentration and its driving mechanisms in Lake Chagan-naoer,Inner Mongolia(2011-2024)
摘要
Abstract
Chlorophyll-a is an important indicator of primary productivity in lake ecosystems,and its concentration changes reflect the nutritional status and ecological health of lakes.Based on water quality and environmental data from Lake Chagannaoer between 2011 and 2024,this study used correlation and redundancy analysis to reveal the interannual and seasonal variation characteristics of chlorophyll-a concentration and its key driving factors.The results showed that between 2011 and 2024,the interannual varia-tion of chlorophyll-a concentration in Lake Chagannaoer was stable,mainly regulated by hydrological conditions,nutrient inputs,and human activities.Seasonally,chlorophyll-a concentration follows the pattern of summer＞winter＞autumn＞spring.In spring,water dilution led to a decrease in chlorophyll-a concentration,while in summer,the rise in temperature promoted phytoplankton proliferation.Autumn cooling inhibited reproduction,and winter freezing led to the migration of nutrients into the water,with pho-tosynthesis under the ice maintaining relatively high chlorophyll-a concentrations.The study further found that in spring and au-tumn,chlorophyll-a concentration was positively correlated with total nitrogen and negatively correlated with total phosphorus;whereas in summer and winter,chlorophyll-a concentration was negatively correlated with total nitrogen and positively correlated with total phosphorus,reflecting the seasonal impact of nutrient changes on phytoplankton growth.Redundancy analysis further in-dicated that the seasonal variation of chlorophyll-a concentration was influenced not only by the current season's climate and envi-ronmental factors but also by the interactions between consecutive seasons,creating cross-seasonal chain effects.Future research should focus on inter-seasonal relationships and environmental effects to further uncover the complexity of lake ecosystems,provi-ding scientific evidence for lake management and conservation.关键词
叶绿素a/演变特征/驱动因素/查干淖尔Key words
Chlorophyll-a/evolution characteristics/driving mechanisms/Lake Chagannaoer引用本文复制引用
张昊,史小红,卢俊平,赵胜男,孙标,侯波,张立杰..2011-2024年内蒙古查干淖尔叶绿素a演变及其驱动机制[J].湖泊科学,2025,37(6):1938-1947,10.基金项目
国家自然科学基金项目(U2443225,52260028,52369014)、内蒙古自治区科技计划项目(2023YFDZ0022,2025YFHH0188)、内蒙古自治区直属高校基础研究资金项目(BR251202)、内蒙古湿地生态系统定位观测与研究站能力提升项目(BR251009)和内蒙古自治区科技领军人才团队项目(2022LJRC0007)联合资助. （U2443225,52260028,52369014）
