The eutrophication of three small lakes in the aquatic zones at the Huainan coal mine subsidence areas, designated as east site (ES), central site (CS), and west site (WS), were studied. Nutrient content, species, and nitrogen (N) to phosphorus (P) ratios were obtained through water quality analyses. Nutrient limitation was evaluated by nutrient enrichment bioassays (NEBs) in the autumn of 2012 and spring of 2013. Average annual concentrations of total phosphorus (TP) were 0.05, 0.08, and 0.10 mg/L, and total nitrogen (TN) concentrations were 0.77, 1.95, and 2.06 mg/L in the water column at CS, ES, and WS, respectively. All of the three lakes exhibited ‘meso-eutrophic’ states and the TN:TP ratio ranged from 25:1 to 74:1 with variability between seasons and sites. NEBs verified that primary productivity in the lakes at ES and WS were mainly limited by P, while N limitation or N and P co-limitation was present in the aquatic zones at CS due to unavailable dissolved inorganic nitrogen. In the studied lakes, the blue-green algae, which comprised 70% of all identified species, was the predominant taxa, while the micro-zooplankton taxa was dominant, indicating a typical trophic structure of eutrophic lakes.
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Research Article|
July 04 2014
Eutrophication and nutrient limitation in the aquatic zones around Huainan coal mine subsidence areas, Anhui, China Available to Purchase
Qitao Yi;
1School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China
E-mail: [email protected]
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Xiaomeng Wang;
Xiaomeng Wang
1School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China
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Tingting Wang;
Tingting Wang
1School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China
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Xijie Qu;
Xijie Qu
1School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China
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Kai Xie
Kai Xie
1School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China
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Water Sci Technol (2014) 70 (5): 878–887.
Article history
Received:
February 17 2014
Accepted:
June 16 2014
Citation
Qitao Yi, Xiaomeng Wang, Tingting Wang, Xijie Qu, Kai Xie; Eutrophication and nutrient limitation in the aquatic zones around Huainan coal mine subsidence areas, Anhui, China. Water Sci Technol 1 September 2014; 70 (5): 878–887. doi: https://doi.org/10.2166/wst.2014.293
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