Antibiotic legacies shape the temperature response of soil microbial communities

Soil microbial communities are vulnerable to global change factors and land management decisions; these factors can therefore affect microbially-mediated ecosystem functions. Increasingly, multiple stressors are considered in investigations of ecological response to disturbances. Here we investigate how historical exposure to antibiotics affects the soil microbial response to a subsequent temperature change. <em>In-situ</em> antibiotic exposure initially increased soil respiration however this effect diminished over time. A subsequent incubation experiment showed that historical antibiotic exposure caused an acclimation-like response to increasing temperature. This response was likely driven by a differential response in the microbial community of antibiotic exposed soils. Microbial communities exposed to antibiotics tended to be dominated by slower-growing, oligotrophic taxa at higher temperatures. Therefore, historical exposure to one stressor is likely to influence the microbial community to subsequent stressors. To predict the response of soils to future stress, particularly increasing soil temperatures, historical context is necessary.

土壤微生物群落极易受全球变化因子与土地管理决策的影响，此类因素可调控微生物介导的生态系统功能。当前在扰动的生态响应研究中，多胁迫因子的综合考量已愈发普遍。本研究聚焦于既往抗生素暴露如何影响土壤微生物对后续温度变化的响应。原位（in-situ）抗生素暴露初始提升了土壤呼吸速率，但该效应随时间推移逐渐减弱。后续的室内培养实验表明，既往抗生素暴露会使土壤微生物群落对升温产生类似驯化的响应。该响应大概率由抗生素暴露土壤中微生物群落的差异化响应所驱动。在高温条件下，经抗生素暴露的微生物群落往往以生长缓慢的贫营养类群为优势类群。由此可见，单类胁迫因子的既往暴露可能会改变微生物群落对后续胁迫因子的响应模式。若要预测土壤生态系统对未来胁迫（尤其是土壤升温）的响应，需纳入历史暴露背景信息。

搜集汇总

背景与挑战

背景概述

该数据集包含土壤微生物群落的测序数据，研究了历史抗生素暴露对微生物群落温度响应的影响。研究发现抗生素暴露导致微生物群落以寡营养类群为主，影响其对温度变化的适应性。