The importance of landscape heterogeneity and vegetation structure for the conservation of the Ortolan Bunting Emberiza hortulana

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION
F. Löffler, T. Fartmann
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引用次数: 1

Abstract

Summary Over the last decades, European farmland birds have strongly declined, mainly driven by agricultural intensification. The Ortolan Bunting Emberiza hortulana has suffered one of the most severe declines among farmland specialists. In order to maintain viable populations of the species in the long run, there is a vital need for evidence-based conservation measures. The main goal of this study was to detect the key drivers of breeding-territory selection and mating success of the species in an agricultural landscape in central Europe. We found that the landscape structure within the territories of Ortolan Bunting breeding pairs strongly varied from the overall habitat availability in the study area on both the territory and home-range scales. However, the environmental conditions also differed between the territories of breeding pairs and those of unpaired males. While landscape structure played an important role in breeding-territory selection, it had only weak effects on mating success. In contrast, crop type and vegetation height at potential nesting sites were important drivers of mating success. Overall, our study revealed that Ortolan Bunting has very complex breeding-habitat requirements. Only heterogeneous agricultural landscapes where (1) suitable song posts, (2) appropriate nesting sites, and (3) sufficient foraging habitats occur in close proximity are suitable for breeding. According to the findings of our study, agri-environmental schemes should primarily facilitate low-intensity farming practices that promote landscape heterogeneity, provide suitable nesting sites, and sustain a high abundance of invertebrate prey in farmlands.
景观异质性和植被结构对圃鹀保护的重要性
在过去的几十年里,欧洲农田鸟类数量急剧下降,主要是由于农业集约化。圃鹀(Ortolan Bunting Emberiza hortulana)在农田专家中遭受了最严重的损失。从长远来看,为了维持该物种的生存种群,有必要采取以证据为基础的保护措施。本研究的主要目的是检测中欧农业景观中该物种繁殖区域选择和交配成功的关键驱动因素。研究发现,在领地和家园尺度上,圃鹀繁殖对领地内的景观结构与研究区总体栖息地可用性存在显著差异。然而,繁殖对和未配对雄的环境条件也存在差异。景观结构在繁殖地选择中起重要作用,但对交配成功率的影响较弱。相比之下,潜在筑巢地的作物类型和植被高度是交配成功的重要驱动因素。总的来说,我们的研究表明,圃鹀狩猎具有非常复杂的繁殖栖息地要求。只有异质农业景观(1)合适的鸣禽站,(2)合适的筑巢地点,(3)有足够的觅食栖息地靠近才适合繁殖。根据我们的研究结果,农业环境方案应该主要促进低强度的农业实践,促进景观异质性,提供合适的筑巢地点,并在农田中维持高丰度的无脊椎动物猎物。
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来源期刊
CiteScore
3.40
自引率
6.20%
发文量
50
审稿时长
>12 weeks
期刊介绍: Bird Conservation International is a quarterly peer-reviewed journal that seeks to promote worldwide research and action for the conservation of birds and the habitats upon which they depend. The official journal of BirdLife International, it provides stimulating, international and up-to-date coverage of a broad range of conservation topics, using birds to illuminate wider issues of biodiversity, conservation and sustainable resource use. It publishes original papers and reviews, including targeted articles and recommendations by leading experts.
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