科研之友
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摘要
Identifying the effects of land use patterns on antibiotics in surface water is an important issue in sustaining water security and guaranteeing human health in urban and rural systems. A typical peri-urban watershed located in Ningbo City was selected as study area. Based on surface water monitoring and laboratory analysis, types and concentrations of antibiotics in surface water were identified and compared between 16 different sub-watersheds, and the effects of land use patterns on antibiotics in surface water were explored. Results of this study showed that total concentrations of antibiotics in surface water ranged from 1.126 ng?L-1 to 53.739 ng?L-1. Considerable differences in types and concentrations of antibiotics in surface water were found in different sub-watersheds. Correlation analysis showed that area proportion of urban, cropland and forestland were closely related to concentration of tetracyclines (TCs) in surface water, and the area proportion of garden had a close correlation with concentration of sulfonamides (SAs). In considering land use patterns in different sub-watersheds, it was found that the total concentration of antibiotics in surface water was substantially correlated with Shannon's Diversity Index (SHDI) and Contagion (CONTAG). Furthermore, concentrations of tetracyclines in surface water were found to have close correlations with Edge Density (ED), Shannon's Diversity Index, Shannon's Evenness Index (SHEI), Contagion, and Aggregation Index (AI). Results of regression analysis in considering land use and landscape indices indicated that antibiotic pollution in surface water was substantially affected by the area of garden, forestland and Shannon's Diversity Index. In addition, the results indicated that area with relatively high human activities and landscape fragmentation usually has relatively higher concentration of antibiotics in surface water.
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单位城市和区域生态国家重点实验室; 中国科学院大学
