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| The corresponding of microbial diversity on water quality and environmental variables of Guanting Reservoir |
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Abstract The water quality and environmental factors of Beijing Guanting Reservoir in different seasons were analyzed based on the characterization of the data from six sampling sites. Generally, the concentrations of the nutrients including carbon, nitrogen, and phosphorus were in the orders of: summer > autumn > spring > winter, and the outbreaks of water-blooms occurred in summer and autumn. The water quality in the upstream (Gui River), was better than that of the downstream (reservoir area), especially in summer and autumn. In summer, the average concentrations of total carbon, total nitrogen, ammonia nitrogen, total phosphorus in upstream were 26.5, 0.95, 0.55, 0.077mg/L respectively, while that of downstream were 111.47, 4.27, 3.16, 0.25mg/L respectively. Microbial community of the water was analyzed employing PCR-DGGE technique. The result showed that bacterial community structures varied considerably between the upstream and the downstream. The upstream water behaved the higher level of bacterial community diversity and richer degree than that of downstream water serious bloom area. In addition, CANOCA software was used to explore the response relationship between microbial community and environmental factors in summer and autumn bloom periods. The result showed strong correlation in response of bacterial community structure with environmental factors (T, pH, DO, NFR, TP, Fe). For upstream water, the better water quality was in the bacterial community structures mainly affected by the temperature and DO factor; while for the downstream, the poor water quality was with the bacteria community structures effected mainly by environmental factors of pH, TP and NFR.
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Received: 01 October 2014
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