Abstract
Further discussion about the limnological features of Lake Puma Yum Co, South Tibet, China, is provided based on the results of several investigations. By using depth data from all over the lake, the whole submarine topography has been compiled. Horizontal analysis of the water's physicochemical features indicates that compared with the relatively uniform water features at other lake areas, apparent spatial heterogeneity exists in the water of the subaquatic alluvial fan induced by the Jiaqu River, the biggest inflow. Vertical analysis of water characteristics using two-factor analysis of variance with no re-experiment indicates that temperature, dissolved oxygen, and pH of the water vary with water depth rhythmically, whereas other parameters demonstrate no evident vertical variation, which shows that chemical stratification is not obvious. But this does not exclude slightly higher concentrations of Ca2+ induced by lower pH at the bottom of deep lake water. The hydrochemistry difference between inflow water and lake water reveals the loss of Ca2+ in lake water, which indicates calcite deposition may be an important characteristic of lake sediment.
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Acknowledgments
This study was supported by the National Natural Science Foundation of China (grant no. 40871099), the National Basic Research Program of China (grant no. 2005CB422002), and the Knowledge Innovation Project of the Chinese Academy of Sciences (grant no. KZCX2-YW-146-4). The authors thank the anonymous reviewer for the constructive remarks and members from both Chinese and Japanese teams for their assistance in the field investigations.
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Zhu, L., Ju, J., Wang, J. et al. Further discussion about the features of Lake Puma Yum Co, South Tibet, China. Limnology 11, 281–287 (2010). https://doi.org/10.1007/s10201-010-0313-5
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DOI: https://doi.org/10.1007/s10201-010-0313-5