Chen Ming, Zeng Guangming, Zhang Jiachao, Xu Piao, Chen Anwei, Lu Lunhui
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
Sci Rep. 2015 Oct 19;5:15043. doi: 10.1038/srep15043.
Human activities continue to increase the amount of carbon (C), nitrogen (N) and phosphorus (P) in lakes, which may cause serious environmental and human health problems. Global landscape of total organic C (TOC), N and P in lake water is still poorly known. Using a global data set that covers ~8300 lakes from 68 countries/regions spanning six continents, we estimate that global mean concentrations and storage in lake water are 5.578 mg L(-1) and 984.0 Tg for TOC, 0.526 mg L(-1) and 92.8 Tg for TN, and 0.014 mg L(-1) and 2.5 Tg for TP. These lake elements are significantly interrelated and in uneven distribution, being associated with morphological characteristics and climate conditions. We proposed that global C, N and P cycles should be considered as a whole in biogeochemical studies and policy-making related to environmental protection.
人类活动持续增加湖泊中碳（C）、氮（N）和磷（P）的含量，这可能会引发严重的环境和人类健康问题。全球湖泊水中总有机碳（TOC）、氮和磷的整体情况仍鲜为人知。利用一个涵盖六大洲68个国家/地区约8300个湖泊的全球数据集，我们估计全球湖泊水中TOC的平均浓度和储量分别为5.578毫克/升和984.0太克，TN为0.526毫克/升和92.8太克，TP为0.014毫克/升和2.5太克。这些湖泊元素显著相关且分布不均，与形态特征和气候条件有关。我们建议，在与环境保护相关的生物地球化学研究和决策中，应将全球碳、氮和磷循环作为一个整体来考虑。
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