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Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China

WU Yalin HUANG Tao HUANG Changchun SHEN Yinyin LUO Yang YANG Hao YU Yanhong LI Ruixiao GAO Yan ZHANG Mingli

WU Yalin, HUANG Tao, HUANG Changchun, SHEN Yinyin, LUO Yang, YANG Hao, YU Yanhong, LI Ruixiao, GAO Yan, ZHANG Mingli. Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China[J]. 中国地理科学, 2018, 28(5): 851-862. doi: 10.1007/s11769-018-0994-y
引用本文: WU Yalin, HUANG Tao, HUANG Changchun, SHEN Yinyin, LUO Yang, YANG Hao, YU Yanhong, LI Ruixiao, GAO Yan, ZHANG Mingli. Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China[J]. 中国地理科学, 2018, 28(5): 851-862. doi: 10.1007/s11769-018-0994-y
WU Yalin, HUANG Tao, HUANG Changchun, SHEN Yinyin, LUO Yang, YANG Hao, YU Yanhong, LI Ruixiao, GAO Yan, ZHANG Mingli. Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China[J]. Chinese Geographical Science, 2018, 28(5): 851-862. doi: 10.1007/s11769-018-0994-y
Citation: WU Yalin, HUANG Tao, HUANG Changchun, SHEN Yinyin, LUO Yang, YANG Hao, YU Yanhong, LI Ruixiao, GAO Yan, ZHANG Mingli. Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China[J]. Chinese Geographical Science, 2018, 28(5): 851-862. doi: 10.1007/s11769-018-0994-y

Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China

doi: 10.1007/s11769-018-0994-y
基金项目: National Natural Science Foundation of China (No. 41503075, 41673108, and 41571324), Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, the State Key Laboratory of Lake Science and Environment (No. 2016SKL005), China Postdoctoral Science Foundation Funded Project (No. 2015M581826)
详细信息
    通讯作者:

    HUANG Changchun. E-mail:huangchangchun@njnu.edu.cn;ZHANG Mingli. E-mail:zhangmingli@njnu.edu.cn

Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China

Funds: National Natural Science Foundation of China (No. 41503075, 41673108, and 41571324), Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, the State Key Laboratory of Lake Science and Environment (No. 2016SKL005), China Postdoctoral Science Foundation Funded Project (No. 2015M581826)
More Information
    Corresponding author: HUANG Changchun. E-mail:huangchangchun@njnu.edu.cn;ZHANG Mingli. E-mail:zhangmingli@njnu.edu.cn
  • 摘要: Sediments have a significant influence on the cycling of nutrient elements in lake environments. In order to assess the distribution characteristics and estimate the bioavailability of phosphorus and nitrogen in Dianchi Lake, organic and inorganic phosphorus and nitrogen forms were analysed. The 210Pb radiometric dating method was employed to study temporal changes in the phosphorus and nitrogen pools in Dianchi Lake. The result show that the total phosphorus (TP) and total nitrogen (TN) were both at high concentrations, ranging from 697.5-3210.0 mg/kg and 1263.7-7155.2 mg/kg, respectively. Inorganic phosphorus (IP) and total organic nitrogen (TON) were the main constituents, at percentages of 59%-78% and 74%-95%, respectively, in the sediments. Spatially, there was a decreasing trend in phosphorus and nitrogen contents from the south and north to the lake centre, which is related to the distribution pattern of local economic production. The burial rates of the various phosphorus and nitrogen forms increased in same spatially and over time. Particularly in the past two decades, the burial rates doubled, with that TN reached to 1.287 mg/(cm2·yr) in 2014. As the most reactive forms, nitrate nitrogen (NO3-N) and ammonia nitrogen (NH4-N) were buried more rapidly in the south region, implying that the potential for releasing sedimentary nitrogen increased from north to south. Based on their concentrations and burial rates, the internal loads of phosphorus and nitrogen were analysed for the last century. A TP pool of 71 597.6 t and a TN pool of 81 191.7 t were estimated for Dianchi Lake. Bioavailable phosphorus and nitrogen pools were also estimated at 44 468.0 t and 5429.7 t, respectively, for the last century.
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Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China

doi: 10.1007/s11769-018-0994-y
    基金项目:  National Natural Science Foundation of China (No. 41503075, 41673108, and 41571324), Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, the State Key Laboratory of Lake Science and Environment (No. 2016SKL005), China Postdoctoral Science Foundation Funded Project (No. 2015M581826)
    通讯作者: HUANG Changchun. E-mail:huangchangchun@njnu.edu.cn;ZHANG Mingli. E-mail:zhangmingli@njnu.edu.cn

摘要: Sediments have a significant influence on the cycling of nutrient elements in lake environments. In order to assess the distribution characteristics and estimate the bioavailability of phosphorus and nitrogen in Dianchi Lake, organic and inorganic phosphorus and nitrogen forms were analysed. The 210Pb radiometric dating method was employed to study temporal changes in the phosphorus and nitrogen pools in Dianchi Lake. The result show that the total phosphorus (TP) and total nitrogen (TN) were both at high concentrations, ranging from 697.5-3210.0 mg/kg and 1263.7-7155.2 mg/kg, respectively. Inorganic phosphorus (IP) and total organic nitrogen (TON) were the main constituents, at percentages of 59%-78% and 74%-95%, respectively, in the sediments. Spatially, there was a decreasing trend in phosphorus and nitrogen contents from the south and north to the lake centre, which is related to the distribution pattern of local economic production. The burial rates of the various phosphorus and nitrogen forms increased in same spatially and over time. Particularly in the past two decades, the burial rates doubled, with that TN reached to 1.287 mg/(cm2·yr) in 2014. As the most reactive forms, nitrate nitrogen (NO3-N) and ammonia nitrogen (NH4-N) were buried more rapidly in the south region, implying that the potential for releasing sedimentary nitrogen increased from north to south. Based on their concentrations and burial rates, the internal loads of phosphorus and nitrogen were analysed for the last century. A TP pool of 71 597.6 t and a TN pool of 81 191.7 t were estimated for Dianchi Lake. Bioavailable phosphorus and nitrogen pools were also estimated at 44 468.0 t and 5429.7 t, respectively, for the last century.

English Abstract

WU Yalin, HUANG Tao, HUANG Changchun, SHEN Yinyin, LUO Yang, YANG Hao, YU Yanhong, LI Ruixiao, GAO Yan, ZHANG Mingli. Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China[J]. 中国地理科学, 2018, 28(5): 851-862. doi: 10.1007/s11769-018-0994-y
引用本文: WU Yalin, HUANG Tao, HUANG Changchun, SHEN Yinyin, LUO Yang, YANG Hao, YU Yanhong, LI Ruixiao, GAO Yan, ZHANG Mingli. Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China[J]. 中国地理科学, 2018, 28(5): 851-862. doi: 10.1007/s11769-018-0994-y
WU Yalin, HUANG Tao, HUANG Changchun, SHEN Yinyin, LUO Yang, YANG Hao, YU Yanhong, LI Ruixiao, GAO Yan, ZHANG Mingli. Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China[J]. Chinese Geographical Science, 2018, 28(5): 851-862. doi: 10.1007/s11769-018-0994-y
Citation: WU Yalin, HUANG Tao, HUANG Changchun, SHEN Yinyin, LUO Yang, YANG Hao, YU Yanhong, LI Ruixiao, GAO Yan, ZHANG Mingli. Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China[J]. Chinese Geographical Science, 2018, 28(5): 851-862. doi: 10.1007/s11769-018-0994-y
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