摘要
水库次表层叶绿素a最大值(Subsurface Chlorophyll Maximum,SCM)层分布特征不仅反映了水库浮游植物、初级生产力垂向分布特征,也反映了水体营养盐等环境因子状况。通过测定不同水层叶绿素a(Chl-a)指标,探讨龙羊峡水库SCM层时空分布特征,分析其与营养盐等主要环境因子的相关性。研究结果显示:1)龙羊峡水库SCM层具有明显的分层现象,Chl-a浓度垂向分布特征表现出表层含量高于底层,且随着季节变化,SCM层的垂直分布范围逐渐变宽。2)龙羊峡水库SCM层分布受多种环境因素的影响,其中温度和营养盐浓度是影响Chl-a垂直分布的主要影响因子。研究SCM层的垂向分布特征对认识龙羊峡水库初级生产力的分布格局有重要意义。
The distribution characteristics of the Subsurface Chlorophyll Maximum(SCM)layer in the reservoir not only reflect the vertical distribution characteristics of phytoplankton and primary productivity in the reservoir,but also reflect the environmental factors such as water nutrients.By measuring the chlorophyll a(Chl-a)index in different water layers,this study explores the spatiotemporal distribution characteristics of the SCM layer in the Longyangxia Reservoir and analyzes its correlation with major environmental factors such as nutrients.The research results show that:1)The SCM layer of Longyangxia Reservoir has a clear stratification phenomenon,and the vertical distribution characteristics of Chl-a concentration show that the surface layer content is higher than the bottom layer,and the vertical distribution range of SCM layer gradually widens with seasonal changes.2)The distribution of SCM layer in Longyangxia Reservoir is influenced by various environmental factors,among which temperature and nutrient concentration are the main influencing factors on the vertical distribution of Chl-a.Studying the vertical distribution characteristics of the SCM layer is of great significance for understanding the distribution pattern of primary productivity in the Longyangxia Reservoir.
作者
都慧芳
陶馨
张艺斐
李积萍
李月
刘扬
DU Hui-fang;TAO Xin;ZHANG Yi-fei;LI Ji-ping;LI Yue;LIU Yang(College of Eco-Environmental Engineering,Qinghai University,Xining 810016,China;State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016,China)
出处
《环境生态学》
2024年第3期107-111,118,共6页
Environmental Ecology
基金
国家自然科学基金项目(31760763)
青海省科学技术厅项目(2019-NK-A2)资助。
关键词
龙羊峡水库
SCM层分布特征
影响因素
Longyangxia Reservoir
distribution characteristics of SCM layer
influencing factor
