关键词: 城市, 非点源污染, 景观格局, 最佳管理措施, 景观生态规划

Abstract: Microbes play important role in the formation of mineral deposit. In this paper, the microbes in different sub-zones of ore-hosting horizon of Shihongtan uranium deposit in Xinjiang were isolated, identified, and counted. The results showed that in the ore-hosting horizon, there were various kinds of aerobic and anaerobic microbes, and their distribution presented apparent regularity with the change of geological feature. In the oxidation zone of the horizon, the groups and quantity of the microbes were greater, and aerobic iron bacteria were prevailing; in the intermediate oxidation-reduction zone, aerobic and anaerobic bacteria coexisted, but the quantity of aerobic bacteria decreased to some extent; while in reduction zone, anaerobic sulfate-reducing bacteria were dominant. The results obtained were of significance in the exploitation of uranium deposit and the control of uranium pollution.

Key words: Urban non-point source pollution, Landscape pattern, Best Management Practices, Landscape ecological planning