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Nitrogen variations during the ice-on season in the eutrophic lakes.
Environ Pollut. 2019 Apr; 247:1089-1099.EP

Abstract

Nitrogen accumulation in sediments, and the subsequent migration and transformations between sediment and the overlying water, plays an important role in the lake nitrogen cycle. However, knowledge of these processes are largely confined to ice-free seasons. Recent research under ice has mainly focused on the water eco-environmental effects during winter. Sediment N accumulation during the ice-on season and its associated eco-environmental impacts have never been systematically investigated. To address these knowledge gaps, we chose Wuliangsu Lake in China as a case study site, taking advantage of the spatial disparity between the 13 semi-separated sub-lakes. Based on samples of 35 sampling sites collected before, in the middle, and at the end of ice-on season separately, we performed a quantitative analysis of under-ice lake N accumulation and water-sediment N exchange by analyzing N fraction variations. Hierarchical Cluster Analysis and Relevance Analysis were used to help elucidate the main causes and implications of under-ice N variation. Our results clearly show that existing studies have underestimated the impact of under-ice N accumulation on the lake ecology throughout year: 1) Sediment N accumulated 2-3 times more than that before winter; 2) residual nitrogen (Res-N) contributed to the majority of the accumulated sediment N and was mainly induced by the debris of macrophytes; 3) total available nitrogen (TAN) was the most easily exchanged fractions between sediment and water, and it mainly affected the water environment during winter; 4) the Res-N accumulation during the ice-on season may have a strong impact on the eco-environment in the subsequent seasons. Our research is valuable for understanding the mechanism of internal nutrient cycle and controlling the internal nitrogen pollution, especially in shallow seasonally-frozen lakes that have long suffered from macrophyte-phytoplankton co-dominated eutrophication.

Authors+Show Affiliations

Department of Environmental Science, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.Department of Environmental Science, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China. Electronic address: heipf06@mails.tsinghua.edu.cn.Department of Environmental Science, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.Department of Environmental Science, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.College of Water Sciences, Beijing Normal University, Beijing, 100875, China. Electronic address: zhuzhongfan1985@bnu.edu.cn.Guizhou Academy of Testing and analysis, Guiyang, 550000, China.Department of Environmental Science, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.Department of Environmental Science, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.Department of Environmental Science, College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.State Key Laboratory of Simulation and Regulation of Water Cycles in River Basins, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30823338

Citation

Yang, Tingting, et al. "Nitrogen Variations During the Ice-on Season in the Eutrophic Lakes." Environmental Pollution (Barking, Essex : 1987), vol. 247, 2019, pp. 1089-1099.
Yang T, Hei P, Song J, et al. Nitrogen variations during the ice-on season in the eutrophic lakes. Environ Pollut. 2019;247:1089-1099.
Yang, T., Hei, P., Song, J., Zhang, J., Zhu, Z., Zhang, Y., Yang, J., Liu, C., Jin, J., & Quan, J. (2019). Nitrogen variations during the ice-on season in the eutrophic lakes. Environmental Pollution (Barking, Essex : 1987), 247, 1089-1099. https://doi.org/10.1016/j.envpol.2018.12.088
Yang T, et al. Nitrogen Variations During the Ice-on Season in the Eutrophic Lakes. Environ Pollut. 2019;247:1089-1099. PubMed PMID: 30823338.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nitrogen variations during the ice-on season in the eutrophic lakes. AU - Yang,Tingting, AU - Hei,Pengfei, AU - Song,Jindong, AU - Zhang,Jing, AU - Zhu,Zhongfan, AU - Zhang,Yingyuan, AU - Yang,Jing, AU - Liu,Chunlan, AU - Jin,Jun, AU - Quan,Jin, Y1 - 2019/01/04/ PY - 2018/08/18/received PY - 2018/12/24/revised PY - 2018/12/28/accepted PY - 2019/3/3/entrez PY - 2019/3/3/pubmed PY - 2019/4/23/medline KW - Eutrophication KW - Hydrophyte debris KW - Ice-on lake KW - Nitrogen cycle KW - Wuliangsu lake SP - 1089 EP - 1099 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 247 N2 - Nitrogen accumulation in sediments, and the subsequent migration and transformations between sediment and the overlying water, plays an important role in the lake nitrogen cycle. However, knowledge of these processes are largely confined to ice-free seasons. Recent research under ice has mainly focused on the water eco-environmental effects during winter. Sediment N accumulation during the ice-on season and its associated eco-environmental impacts have never been systematically investigated. To address these knowledge gaps, we chose Wuliangsu Lake in China as a case study site, taking advantage of the spatial disparity between the 13 semi-separated sub-lakes. Based on samples of 35 sampling sites collected before, in the middle, and at the end of ice-on season separately, we performed a quantitative analysis of under-ice lake N accumulation and water-sediment N exchange by analyzing N fraction variations. Hierarchical Cluster Analysis and Relevance Analysis were used to help elucidate the main causes and implications of under-ice N variation. Our results clearly show that existing studies have underestimated the impact of under-ice N accumulation on the lake ecology throughout year: 1) Sediment N accumulated 2-3 times more than that before winter; 2) residual nitrogen (Res-N) contributed to the majority of the accumulated sediment N and was mainly induced by the debris of macrophytes; 3) total available nitrogen (TAN) was the most easily exchanged fractions between sediment and water, and it mainly affected the water environment during winter; 4) the Res-N accumulation during the ice-on season may have a strong impact on the eco-environment in the subsequent seasons. Our research is valuable for understanding the mechanism of internal nutrient cycle and controlling the internal nitrogen pollution, especially in shallow seasonally-frozen lakes that have long suffered from macrophyte-phytoplankton co-dominated eutrophication. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/30823338/Nitrogen_variations_during_the_ice_on_season_in_the_eutrophic_lakes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(18)33682-0 DB - PRIME DP - Unbound Medicine ER -