生物降解
微生物种群生物学
沉积物
人口
适应
利基
降级(电信)
化学
抗生素
环境化学
细菌
环境科学
微生物学
作者
Wenlong Zhang,Yi Li,Chao Wang,Peifang Wang,Jun Hou,Zhongbo Yu,Lihua Niu,Linqiong Wang,Jing Wang
标识
DOI:10.1021/acs.est.6b01573
摘要
To understand the interaction between bacterial community assembly and the assembly linked antibiotics biodegradation, a unique model framework containing a Monod kinetic, a logistic kinetic, and a stochastic item was established to describe the biodegradation of bacterial community assembly linked sulfamethoxazole (SMX) in river sediment. According to the modeling results, both deterministic and stochastic processes driving bacterial population variations played important roles in controlling SMX biodegradation, and the relative importance depended on the in situ concentration of SMX. A threshold concentration of SMX, which was biodegraded in the experimental river sediment depending on different processes, was obtained (i.e., 20 μg/kg). The higher introduced concentration of SMX (>20 μg/kg) was found to promote the acclimation of antibiotic degradation bacteria in microbial community through niche differentiation, which resulted in the specific microbial metabolization of SMX. In contrast, the lower int...
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