We report a case of structural oversimplification in a small mammal assemblage, indirectly obtained by owl pellets (central Italy), where mice (Rodentia Muridae) largely dominated both in abundance and biomass (about 95%). We hypothesise that this fact could be due to: (i) recent anthropisation, which induced both an expected increase of synanthropic generalist species (mice, Muridae) and a sharp reduction in high trophic level species (shrews, Soricomorpha), and, (ii) historical land reclamation occurred in the 19th century, which changed the edaphic characteristics, and consequently inducing an unexpected local absence of common digging species (yet reported by literature for the Maremma plain) everywhere diffused along Italian peninsula: the ubiquitous Microtus savii (Microtidae), and the moles (Talpa spp., Talpidae). These two causal processes, acting at different temporal scales, could strongly affect the structure of the small mammal assemblage, dominated by a single taxonomic guild (Muridae), therefore similar to neighbouring insular assemblages (Tuscan Archipelago).

中文翻译：

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开垦地区的小型哺乳动物群落：历史土壤利用变化和最近的人类化是否影响了它们的优势结构？

我们报告了一个小型哺乳动物组合结构过度简化的案例，该组合由猫头鹰颗粒间接获得（意大利中部），其中小鼠（鼠科）在丰度和生物量方面都占主导地位（约 95%）。我们假设这一事实可能是由于：（i）最近的人类化，这导致了同人类通才物种（小鼠、鼠科）的预期增加和高营养级物种（鼩鼱、Soricomorpha）的急剧减少，以及，（ii ) 历史上的土地开垦发生在 19 世纪，这改变了土壤的特征，因此导致了意外的当地缺乏常见的挖掘物种（但有文献报道了马雷马平原）沿着意大利半岛无处不在：无处不在的 Microtus savii（Microtidae） ，和痣（Talpa spp.，Talpidae）。这两个因果过程，