NEIGAE OpenIR
Differences in the distribution and optical properties of DOM between fresh and saline lakes in a semi-arid area of Northern China
Z. D. Wen, K. S. Song, Y. X. Shang, Y. Zhao, C. Fang and L. L. Lyu
2018
发表期刊Aquatic Sciences
卷号80
摘要In limnological environments, most organic carbon is present in the dissolved form. Dissolved organic carbon (DOC) is the main source of energy for microbial metabolism and biosynthesis, and also affects photosynthetic radiation level and the attenuation of ultraviolet irradiation to protect aquatic organisms. There are large differences in DOC concentration, source, and characteristics due to regional variations in water quality and basin characteristics. Reliable estimates of DOC and analysis of optical characteristics are crucial to understand the true role of lakes in the global carbon cycle. In this article, the distribution of DOC across 30 lakes in semi-arid areas of Northern China is reported. The data shows that saline lakes exhibited higher DOC concentrations than freshwater lakes, and the positive relationship between salinity and DOC was established (R-2 = 0.42, p < 0.01, n = 196). The mean DOC concentration in eutrophic lakes was lower than in mesotrophic and oligotrophic lakes. Analysis of optical characteristics of CDOM indicated that saline lakes in this semi-arid regions contained abundant fulvic acid, and greater levels of autochthonous dissolved organic matter (DOM) with a lower molecular mass than fresh waters. The total suspended matter (TSM) is the main factor influencing on SUVA(254) in both freshwater and saline lakes with a negative correlation. SUVA(254) was negatively correlated with the salinity only in freshwater lakes, and with pH only in saline lakes. The result suggests that it was doubtful whether CDOM or SUVA(254) alone can be a predictor of DOC concentration and other water quality parameters, especially in different types of lakes with different optical and physicochemical characteristics.
文献类型期刊论文
条目标识符http://ir.iga.ac.cn/handle/131322/9139
专题中国科学院东北地理与农业生态研究所
作者单位中国科学院东北地理与农业生态研究所
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GB/T 7714
Z. D. Wen, K. S. Song, Y. X. Shang, Y. Zhao, C. Fang and L. L. Lyu. Differences in the distribution and optical properties of DOM between fresh and saline lakes in a semi-arid area of Northern China[J]. Aquatic Sciences,2018,80.
APA Z. D. Wen, K. S. Song, Y. X. Shang, Y. Zhao, C. Fang and L. L. Lyu.(2018).Differences in the distribution and optical properties of DOM between fresh and saline lakes in a semi-arid area of Northern China.Aquatic Sciences,80.
MLA Z. D. Wen, K. S. Song, Y. X. Shang, Y. Zhao, C. Fang and L. L. Lyu."Differences in the distribution and optical properties of DOM between fresh and saline lakes in a semi-arid area of Northern China".Aquatic Sciences 80(2018).
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