Polymeric substances produced by microbes play a key role for the development of soil aggregates. Here, we investigated the dynamics of bacterial families contributing to the formation of exopolysaccharides and lipopolysaccharides, major constituents of polymeric substances, at a managed land reclamation site of a post‐mining area. We collected soil samples from the initial and the agricultural management phase and expected a peak in the abundance of bacteria capable for exopolysaccharide and lipopolysaccharide production at the points of the biggest disturbances. We used shotgun metagenomic sequencing in combination with measurements of exopolysaccharide concentrations. Our results underline the importance of exopolysaccharide and lipopolysaccharide‐producing bacteria after nutrient input combined with structural disturbance events, caused here by the initial planting of alfalfa and the introduction of a tillage regime together with organic fertilization in the agricultural management phase. Moreover, the changes in management caused a shift in the exopolysaccharide/lipopolysaccharide‐producing community. The initial phase was dominated by typical colonizers of oligotrophic environments, specifically nitrogen fixers (Rhizobiaceae, Comamonadaceae, Hyphomicrobiaceae), while bacteria common in agricultural soils, such as Sphingomonadaceae, Oxalobacteraceae and Nitrospiraceae, prevailed in the agricultural management phase.

中文翻译：

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围垦管理策略的改变塑造了土壤中形成多糖和产脂多糖的细菌的作用。

微生物产生的聚合物质对土壤聚集体的发展起着关键作用。在这里，我们研究了在矿区的受管理的土地开垦地点，细菌家族的动力学，这些细菌家族有助于形成外多糖和脂多糖（聚合物质的主要成分）。我们从初期和农业经营阶段收集了土壤样品，并预计在最大的干扰点，能够分泌胞外多糖和脂多糖的细菌数量会达到峰值。我们将shot弹枪宏基因组测序与胞外多糖浓度的测量结合使用。我们的结果强调了营养输入后结合结构扰动事件产生外多糖和脂多糖的细菌的重要性，这是由于在农业管理阶段开始种植苜蓿，引入耕作制度以及有机肥而引起的。此外，管理上的变化导致胞外多糖/脂多糖生产社区的转移。初始阶段主要由贫营养环境的典型定居者主导，特别是固氮剂（根瘤菌科，Comamonadaceae，Hyphomicrobiaceae）是农业管理阶段盛行的农业土壤中常见的细菌，如Sphingomonadaceae，Oxalobacteraceae和Nitrospiraceae。