| 引用本文: | 李凯迪,周远洋,周起超,董云仙,张运林,常军军,陈乐,陆轶峰.云南程海真光层深度的时空分布及其影响因子.湖泊科学,2019,31(1):256-267. DOI:10.18307/2019.0124 |
| LI Kaidi,ZHOU Yuanyang,ZHOU Qichao,DONG Yunxian,ZHANG Yunlin,CHANG Junjun,CHEN Le,LU Yifeng.Temporal-spatial distribution of euphotic depth and its influencing factors in Lake Chenghai, Yunnan Province, China. J. Lake Sci.2019,31(1):256-267. DOI:10.18307/2019.0124 |
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| 云南程海真光层深度的时空分布及其影响因子 |
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李凯迪1,2, 周远洋1,2, 周起超2,3, 董云仙2, 张运林3, 常军军1, 陈乐1,2, 陆轶峰1
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1.云南大学生态学与环境学院, 昆明 650500;2.云南省环境科学研究院(中国昆明高原湖泊国际研究中心)云南省高原湖泊流域污染过程与管理重点实验室, 昆明 650034;3.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008
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| 摘要: |
| 程海位于云南省丽江市永胜县，是高原封闭型深水湖泊的典型代表.为了揭示程海真光层深度的时空分布及其影响因子，于2016年3月-2017年2月在程海布设9个点位开展逐月调查.结果显示：光合有效辐射漫射衰减系数、真光层深度的年均值分别为1.06±0.25 m-1、4.64±1.27 m；空间变化方面，无论"北、中、南部"还是"西、中、东部"，全年、逐月及雨旱季的真光层深度均无显著差异；时间变化方面，5月的真光层深度最高（6.49±1.03 m）、7月的最低（3.63±0.48 m），且全年、雨季、旱季的各月份间差异显著；回归分析发现，浮游植物生物量是程海真光层深度的最主要影响因子，悬浮物浓度次之（主要在雨季），有色可溶性有机物的影响甚微.为进一步识别程海真光层深度的间接影响因子，本文还分析了浮游植物生物量与生态因子的相关性.本研究可为程海的保护和治理积累数据并提供借鉴. |
| 关键词: 真光层 漫射衰减系数 光合有效辐射 浮游植物 雨旱季 云贵高原 程海 |
| DOI：10.18307/2019.0124 |
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| 基金项目:国家重点研发计划项目（2017YFA0605202）、国家自然科学基金项目（41601208，41621002）、中国科学院前沿科学重点研究项目（QYZDB-SSW-DQC016）和云南省环境科学研究院创新团队计划项目联合资助. |
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| Temporal-spatial distribution of euphotic depth and its influencing factors in Lake Chenghai, Yunnan Province, China |
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LI Kaidi1,2, ZHOU Yuanyang1,2, ZHOU Qichao2,3, DONG Yunxian2, ZHANG Yunlin3, CHANG Junjun1, CHEN Le1,2, LU Yifeng1
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1.School of Ecology and Environmental Science, Yunnan University, Kunming 650500, P. R. China;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 650034, P. R. China;3.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
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| Abstract: |
| 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. |
| Key words: Euphotic zone diffuse attenuation coefficient photosynthetically active radiation phytoplankton rainy and dry seasons Yunnan-Guizhou Plateau Lake Chenghai |
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