Spatial Variations of Subsurface Chlorophyll Maxima During Thermal Stratification in a Large, Deep Subtropical Reservoir
Spatial Variations of Subsurface Chlorophyll Maxima During Thermal Stratification in a Large, Deep Subtropical Reservoir
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大型深亚热带水库热分层过程中地下叶绿素最大值的空间变化
DOI：
10.1029/2019jg005480
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发表时间：
2020-01
影响因子：
3.7
通讯作者：
Liu Mingliang
中科院分区：
文献类型：
--
作者：
Liu Miao;Zhang Yunlin;Shi Kun;Melack John;Zhang Yibo;Zhou Yongqiang;Zhu Mengyuan;Zhu Guangwei;Wu Zhixu;Liu Mingliang
地下叶绿素最大值（SCM）存在于分层湖泊、水库和海洋中。研究了千岛湖大型亚热带深层水库层化过程中SCM强度、深度和厚度的空间变化特征及其影响因素。随着2014年春末热分层的形成，整个湖泊的SCM参数存在显著的空间差异。SCM深度和厚度与真光层深度和混合层深度呈正相关，与基质养分浓度呈负相关。SCM大小与光深和混合层深度呈负相关，与基质养分浓度呈正相关。湖泊各分区间SCM的季节变化与环境参数的季节差异有关。SCM（春季平均66.2 mg/m2，夏季平均96.4 mg/m2）约占水体总面积叶绿素（chl）的82%，且SCM量级与chl的相关性较表层叶绿素浓度好。本研究有助于了解亚热带深层湖泊生态系统空间变化的影响因素。
Subsurface chlorophyll maxima (SCM) are found in stratified lakes, reservoirs, and oceans. Spatial variations of the SCM magnitude, depth, and thickness during stratification and related factors were examined in a large, deep subtropical reservoir, Lake Qiandaohu. Significant spatial differences in the SCM parameters were found throughout the lake as thermal stratification developed in the late spring of 2014. SCM depth and thickness were positively correlated with euphotic depth and mixed layer depth but negatively correlated with epilimnetic nutrient concentrations. SCM magnitude was negatively correlated with euphotic depth and mixed layer depth and positively correlated with epilimnetic nutrient concentrations. Seasonal variations in SCM differed among subregions of the lake, which were related to seasonal differences in environmental parameters. SCM (averaging 66.2 mg/m2 in spring and 96.4 mg/m2 in summer) accounted for about 82% of the total areal chlorophyll of the water column (Tchl), and the SCM magnitude was better correlated with Tchl than the surface chlorophyll concentration. This study contributes to understanding of factors causing spatial variations in of SCM in the deep subtropical lakes.
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影响因子：
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作者：
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