Abstract Land consolidation can negatively affect biodiversity, as it is usually followed by the expansion of arable land, a decrease in crop and land cover diversity, and an increase in the application of agrochemicals. The aim of our study was to compare the species’ composition and abundance of farmland birds, as well as habitat structure, on consolidated and non-consolidated sites in Goricko, NE Slovenia. Habitat diversity was much lower on consolidated sites compared to non-consolidated ones, with arable fields and associated habitats (e.g. grass field margins, field tracks) prevailing on the former. Non-consolidated sites held higher proportions of different types of meadows, hedgerows, solitary trees, succession and traditional orchards. Farmland bird diversity and the abundance of a majority of farmland bird species were higher on non-consolidated sites. The only two exceptions to this were the Eurasian Skylark and the Common Stonechat, which were more abundant on consolidated sites. Both the species suffered population declines at Goricko in the period 1997-2016, bringing into question the suitability of intensively managed arable fields as their breeding and foraging habitat. Individual species’ regression analysis revealed that the most influential positive explanatory variable for the presence of Red-backed Shrike, Tree Sparrow and Common Whitethroat was non-consolidated, extensively managed mosaic landscapes, whereas for the Yellowhammer this explanatory variable was superseded only by forest islands without traditional orchards. Land consolidation, as performed in Slovenia, negatively affects farmland bird diversity and its European conservation value, which is why it should not be performed on Natura 2000 sites, designated for nature conservation.

中文翻译：

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土地整理对农田鸟类多样性和保护价值产生负面影响

摘要 土地整理会对生物多样性产生负面影响，因为它通常伴随着耕地的扩张、作物和土地覆盖多样性的减少以及农用化学品的应用增加。我们研究的目的是在斯洛文尼亚东北部戈里科的合并和非合并地点比较农田鸟类的物种组成和丰度，以及栖息地结构。与非整合场地相比，整合场地的栖息地多样性要低得多，前者主要是耕地和相关栖息地（例如草地边缘、田间小径）。非合并场地拥有更高比例的不同类型的草地、树篱、孤树、演替和传统果园。非合并地点的农田鸟类多样性和大多数农田鸟类物种的丰度较高。唯一的两个例外是 Eurasian Skylark 和 Common Stonechat，它们在合并站点上更为丰富。1997 年至 2016 年期间，这两个物种在 Goricko 的种群数量都出现了下降，这使人们对集约化管理的耕地作为其繁殖和觅食栖息地的适宜性产生了质疑。单个物种的回归分析显示，对红背伯劳、树麻雀和普通白喉鸟存在影响最大的正解释变量是非整合的、广泛管理的马赛克景观，而对于黄锤鸟，这一解释变量仅被森林岛屿所取代没有传统的果园。在斯洛文尼亚进行的土地整理，