Oxytetracycline and Ciprofloxacin Exposure Altered the Composition of Protistan Consumers in an Agricultural Soil

生态学 营养水平 丰度(生态学) 微观世界 微生物生态学 生物 细菌 遗传学
作者
Bao‐Anh Thi Nguyen,Qing‐Lin Chen,Ji‐Zheng He,Hang‐Wei Hu
出处
期刊:Environmental Science & Technology [American Chemical Society]
卷期号:54 (15): 9556-9563 被引量:64
标识
DOI:10.1021/acs.est.0c02531
摘要

Protists, an integral component of soil microbiome, are one of the main predators of bacteria. Bacteria can produce toxic secondary metabolites, e.g., antibiotics to fight stress under the predation pressure of protists; however, impacts of antibiotics on the profile of protists in soils remain unclear. Here, we constructed a microcosm incubation to investigate the effects of two common antibiotics, oxytetracycline and ciprofloxacin, on the protistan and bacterial communities in an arable soil. Rhizaria were the most abundant protist supergroup, followed by Amoebozoa, Stramenopiles, and Aveolata. Among trophic functional groups, consumers were predominant within the protistan community. The protistan alpha-diversity was not significantly changed, while the bacterial alpha-diversity was decreased under the pressure of antibiotics. Nevertheless, the antibiotic exposure considerably reduced the relative abundance of protistan lineages in Rhizaria and Amoebozoa, which were the dominant supergroups of protistan consumers, while increased the relative abundance of other consumer and phototrophic protists. Altogether, we provide novel experimental evidence that the bacterivorous consumers, an important functional group of protists, were more sensitive to antibiotics than other functional groups. Our findings have potential implications for the induced alterations of protistan community and their ecological functions under the scenarios of projected increasing global antibiotic usage.

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