Temporal-spatial distribution of euphotic depth and its influencing factors in Lake Chenghai, Yunnan Province, China

被引：3
|
作者：
Li K. [1 ,2 ]
Zhou Y. [1 ,2 ]
Zhou Q. [2 ,3 ]
Dong Y. [2 ]
Zhang Y. [3 ]
Chang J. [1 ]
Chen L. [1 ,2 ]
Lu Y. [1 ]
机构：
[1] School of Ecology and Environmental Science, Yunnan University, Kunming
[2] Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed, Yunnan Institute of Environmental Science (Kunming China International Research Center for Plateau Lakes), Kunming
[3] State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing
来源：
Hupo Kexue/Journal of Lake Sciences | 2019年 / 31卷 / 01期
关键词：
Diffuse attenuation coefficient; Euphotic zone; Lake Chenghai; Photosynthetically active radiation; Phytoplankton; Rainy and dry seasons; Yunnan-Guizhou Plateau;
D O I：
10.18307/2019.0124
中图分类号：
学科分类号：
摘要：
Lake Chenghai is a plateau-enclosed deep lake located in Yongsheng County, Lijiang City, Yunnan Province, China. To understand the temporal-spatial distribution of euphotic depth and its influencing factors, we carried out field investigations including nine sampling sites in the lake from March 2016 to February 2017. The results showed that the mean value of the attenuation coefficient of photosynthetically active radiation and the euphotic depth were 1.06±0.25 m-1 and 4.64±1.27 m, respectively. There were no significant difference in the spatial distribution of the euphotic depth in the whole year, months, rainy and dry seasons. Meanwhile, the euphotic depth were significantly different among months (throughout the whole year, as well as in the rainy and dry seasons), and the highest and the lowest monthly value of euphotic depth were 6.49±1.03 m (May) and 3.63±0.48 m (July), respectively. Moreover, the phytoplankton biomass was the main regulating factor that controlling the euphotic depth, and the impact of suspended solids on euphotic depth was found in rainy season, few impact of chromophoric dissolved organic matter on euphotic depth was detected. To further test the indirect influencing factors that affecting euphotic depth, the Spearman correlation between the phytoplankton biomass and its ecological factors was also conducted. This study could accumulate the limnological data and provide the reference for the environmental protection of Lake Chenghai. © 2019 by Journal of Lake Sciences.
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页码：256 / 267
页数：11
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