Inland wetlands are crucial for biodiversity conservation, especially in highly-urbanized landscapes. In the European Union, many wetlands are included in the EU ‘Natura 2000’ network, the main tool for biodiversity conservation over the continent, which requires the development of site-specific management plans. Clear and feasible recommendations are necessary to provide site managers with effective tools for the maintenance of biodiversity in these unstable environments. Birds are excellent umbrella species, therefore a management targeted at increasing habitat suitability for focal bird species would likely benefit broader wetland biological communities. During spring–summer 2017, we collected presence/absence data for 10 bird species of conservation interest at a site scale for 21 Natura 2000 sites. We also carried out a point count survey to detect presence/absence of four reedbed-dwelling species at 75 points. At the site level, we estimated landscape characteristics from regional GIS-layers, whereas fine-scaled habitat composition was recorded on the field within a 100 m-buffer around the 75 points. We analysed the effect of the extent of different habitats on species’ occurrence probability by means of multi-species binomial multivariate adaptive regression splines (MARS) at both scales. We also run species-specific MARS models to compare their performance with those of multi-species models. At the site scale, the extent of the reedbeds/mires was positively associated with the occurrence of all species of conservation concern. At the point-count scale, reedbed extent positively predicted species’ occurrence, but only in presence of patches of clear shallow water. Species-specific MARS models showed qualitatively similar results for some species, but generally were outperformed by multi-species ones. Multi-species MARS models confirmed to be an efficient tool in disclosing species-habitat relationships even for set of species including scarce taxa and when only short-term monitoring data are available. In terms of conservation measures, our findings stress the importance of Phragmites australis reedbed as a key habitat for avian biodiversity, but only when it is flooded and interspersed with scattered patches of open water. The preservation of wide (> 100/150 ha) and flooded reedbeds structured in spots of no less than 2 ha emerges as the main conservation measure for the long-term conservation of the threatened avifauna of inland pre-Alpine wetlands.

中文翻译：

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多物种栖息地模型凸显了淹没的芦苇床对内陆湿地鸟类的关键重要性：对管理和保护的意义

内陆湿地对于生物多样性保护至关重要，特别是在高度城市化的景观中。在欧盟，欧盟“ Natura 2000”网络中包括许多湿地，这是非洲大陆生物多样性保护的主要工具，需要制定针对特定地点的管理计划。明确而可行的建议对于为站点管理员提供在这些不稳定环境中维护生物多样性的有效工具是必要的。鸟类是极好的伞形物种，因此，旨在提高栖息地对重点鸟类物种的适应性的管理措施可能会使更广泛的湿地生物群落受益。在2017年春季至夏季，我们在21个Natura 2000站点的站点规模上收集了10种具有保护意义的鸟类的有无数据。我们还进行了点数调查，以检测在75个点处是否存在四种芦苇栖居物种。在站点级别，我们从区域GIS层估算了景观特征，而在75点附近100 m缓冲区中的现场记录了精细的栖息地组成。我们通过两个尺度上的多物种二项式多元自适应回归样条（MARS）分析了不同生境范围对物种发生概率的影响。我们还运行特定物种的MARS模型，以将其性能与多物种模型的性能进行比较。在站点规模上，芦苇丛/ mires的范围与所有需要关注的物种的发生呈正相关。在点数尺度上，芦苇程度正向预测物种的发生，但仅在有片浅水的情况下存在。特定物种的MARS模型在某些物种上显示出定性相似的结果，但通常优于多物种模型。多物种MARS模型被证实是揭示物种与栖息地关系的有效工具，即使对于包括稀有分类群在内的一组物种，也只有短期监测数据可用时。在保护措施方面，我们的研究结果强调了芦苇芦苇作为禽类生物多样性的重要栖息地的重要性，但前提是芦苇被淹没并散布着零星的开放水域。保存范围广（>