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| Characterization of primary productivity in the aquatic zones around the Huainan and Huaibei coalmine subsidence areas |
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Abstract Three sites in the Huainan “Panxie” coalmine areas (PXPJ, PXQQ and PXXQ), and two sites in the Huaibei “Zhu-Yang Zhuang” coalmine areas (HBZH and HBNH), were employed to address the characteristics of primary productivity (PP) and carbon pools in the aquatic zones around Huainan and Huaibei coalmine subsidence area. The analyzed carbon pools are in forms of dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), and particulate organic carbon (POC). This research was conducted in one-year period within four seasons from 2012 to 2013. Then the relationships between PP, carbon pools and other environmental factors were discussed. The nutrient content, PP and carbon pools changed with a great spatial-temporal variability, which was probably attributed to the site-specific conditions as regional geography and climate, local water chemistry and other ecological factors as well. The averaged chlorophyll-a (Chla), POC and gross primary productivity of water column were 3.7 to 71.5mg/m3, 0.9~4.0mgC/L, and 82.4~2305.4mgC/(m2?d), respectively. The nutrient levels and PP in the aquatic zones around the Huainan mining areas were greatly higher than those in the Huaibei mining areas. There were significantly positive correlations between PP and nutrients, Chla, DOC, POC. Finally, the differential principles and strategies, aimed to help regionally ecological rehabilitation, restoration and conservation, were proposed based on the present study.
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Received: 28 September 2013
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