Spatio-Temporal Variation of Release Flux of Sediment Nitrogen and Phosphorus in High-Risk Period of Algal Bloom in Lake Erhai

被引：4
|
作者：
Liu S.-R. [1 ,2 ]
Zhao J.-D. [3 ]
Xiao S.-B. [1 ]
Ni Z.-K. [2 ]
Wang S.-R. [1 ,2 ,4 ]
机构：
[1] College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang
[2] Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing
[3] Dali Administration of Erhai Lake Basin, Dali
[4] Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed, Kunming
来源：
Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 02期
关键词：
Impact factor; Lake Erhai; Nitrogen and phosphorus; Release flux; Sediment; Temporal and spatial variation;
D O I：
10.13227/j.hjkx.201907160
中图分类号：
学科分类号：
摘要：
Spatial and temporal characteristics of release fluxes of sediment nitrogen (N) and phosphorus (P) were investigated in the high-risk period of algal blooms in Lake Erhai. Moreover, the influence factors were examined. Results show that the release flux of N and P increased in recent years, exhibiting a clear increase in the period from 2009 to 2013, and a slight increase in the period since 2013. The release flux of dissolved total nitrogen (DTN) ranged between 11.71-14.15 mg•(m2•d)-1, within which the release flux of dissolved organic nitrogen (DON) and dissolved inorganic nitrogen (DIN) were 6.39-8.42 mg•(m2•d)-1 and 5.31-5.73 mg•(m2•d)-1, accounting for 58% and 42% of the DTN, respectively. The release flux of dissolved total phosphorus (DTP) ranged between 0.11-0.14 mg•(m2•d)-1, within which the release flux of dissolved organic phosphorus (DOP) and dissolved inorganic phosphorus (DIP) were 0.04-0.05 mg•(m2•d)-1 and 0.07-0.09 mg•(m2•d)-1, accounting for 34% and 66% of the DTP, respectively. The distribution of release flux of N showed a decreasing order: south>north>middle, while P was north>middle>south. The release flux of N increased by 17%, 13% and 23%, and the release flux of P increased by 19%, 28%, and 29% in north, middle, and south part of Lake Erhai from 2009 to 2018. Comparing the years 2009, 2013 and 2018, although the contents of N and P were stable, the release flux of N and P in the sediment was enhanced due to increasing pH and decreasing DO. Therefore, the increasing release of nitrogen and phosphorus from sediments, caused by changes in the water environment factors, should be paid attention to for the protection of Lake Erhai. © 2020, Science Press. All right reserved.
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页码：734 / 742
页数：8
相关论文
共 36 条
  • [1] Zhou Q.X., Gibson C.E., Zhu Y.M., Evaluation of phosphorus bioavailability in sediments of three contrasting lakes in China and the UK, Chemosphere, 42, 2, pp. 221-225, (2001)
  • [2] Kaiserli A., Voutsa D., Samara C., Phosphorus fractionation in lake sediments-Lakes Volvi and Koronia, N. Greece, Chemosphere, 46, 8, pp. 1147-1155, (2002)
  • [3] Bachmann R.W., Hoyer M.V., Canfield D.E., Internal heterotrophy following the switch from macrophytes to algae in Lake Apopka, Florida, Hydrobiologia, 418, 1, pp. 217-227, (2000)
  • [4] Lauridsen T.L., Jensen J.P., Jeppesen E., Et al., Response of submerged macrophytes in Danish lakes to nutrient loading reductions and biomanipulation, Hydrobiologia, 506-509, 1-3, pp. 641-649, (2003)
  • [5] Li B., Ding S.M., Fan C.X., Et al., Estimation of releasing fluxes of sediment nitrogen and phosphorus in Fubao Bay in Dianchi Lake, Environmental Science, 29, 1, pp. 114-120, (2008)
  • [6] Wang C., Hou Z.Y., Chu Z.S., Et al., Vertical distribution of microcystis and its influence factors in Lake Erhai during high risk period for algal bloom, Research of Environmental Sciences, 31, 7, pp. 1250-1257, (2018)
  • [7] Kong F.X., Gao G., Hypothesis on cyanobacteria bloom-forming mechanism in large shallow eutrophic lakes, Acta Ecologica Sinica, 25, 3, pp. 589-595, (2005)
  • [8] Chen M.S., Ding S.M., Chen X., Et al., Mechanisms driving phosphorus release during algal blooms based on hourly changes in iron and phosphorus concentrations in sediments, Water Research, 133, pp. 153-164, (2018)
  • [9] Jiang X., Zhong L.X., Wang S.H., Et al., Dissolvable nitrogen variation at water-sediment interface during alga blooming process in Chaohu Lake, China Environmental Science, 29, 11, pp. 1158-1163, (2009)
  • [10] Wang J.Z., Jiang X., Zheng B.H., Et al., Effect of algal bloom on phosphorus exchange at the sediment-water interface in Meiliang Bay of Taihu Lake, China, Environmental Earth Sciences, 75, 1, (2016)
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