两淮采煤沉陷积水区水体初级生产特征

在淮南潘谢矿区设置3个研究站点(PXPJ、PXGQ和PXXQ),在淮北朱-杨庄矿区内设置2个研究站点(HBZH和HBNH),于2012年和2013年分4个季度对两淮采煤沉陷积水区水体的初级生产力及碳(C)的形态特征进行了研究,其中C形态分溶解无机碳(DIC)、溶解有机碳(DOC)和颗粒有机碳(POC),并以此为基础分析了初级生产力与C形态及其它环境因子的相关关系.研究结果表明:受区域地理气候、水化学特征和矿区生态环境等方面影响,5个研究站点水体营养状态、初级生产力及C形态等存在着较大的跨度范围. 5个站点4个季度研究期间叶绿素a(Chla)浓度均值范围为3.7~71.5mg/m3,POC浓度均值范围为0.9~4.0mgC/L,总初级生产力(GPP)均值范围82.4~2305.4mgC/(m2?d), 淮南沉陷积水区水体营养状态和初级生产力明显高于淮北沉陷积水区.5个研究站点水体初级生产力和氮磷含量、Chla、DOC和POC具有显著的正相关性.最后根据研究结果针对性地提出了两淮矿区水生态区生态系统重建、恢复与保护的差别化原则.

Characterization of primary productivity in the aquatic zones around the Huainan and Huaibei coalmine subsidence areas

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.