Bird deterrent measures at a landfill decreased the productivity of a dependent population of White Stork (Ciconia ciconia)

IF 1.8 3区 生物学 Q1 ORNITHOLOGY
Ibis Pub Date : 2024-10-22 DOI:10.1111/ibi.13367
Laura Osorio, Alejandro López-García, Irene Colino-Freire, Elena Ramos-Elvira, José I. Aguirre
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Abstract

Landfills provide an abundant and predictable food source for avifauna. The energy and time that are saved because of landfill-foraging have had positive effects on the distribution of bird breeding populations and their reproductive parameters. However, the proliferation of individuals coinciding with the appearance of landfills often increases human–wildlife conflicts and intensifies the contact between waste and the environment. In this context, a landfill in Madrid (Spain) implemented deterrent measures in 2021 aiming to reduce the influx of birds inside its facilities. This study aims to describe the effects that a reduction in the accessibility and availability of landfill food resources may have had on the surrounding breeding populations of White Stork Ciconia ciconia. For this purpose, the breeding parameters of three populations with different landfill use indices were analysed before and after the application of bird deterrent measures. The closest population, with the highest landfill use index, suffered a drastic reduction in fledgling productivity during the breeding season with bird deterrent measures. On the other hand, a drought during one of the breeding seasons negatively affected the productivity of the populations that relied partially and completely on natural food resources (located at medium and long distance from the landfill, respectively). Landfill-foraging might have mitigated the consequences of the natural food scarcity caused by this drought, even with the application of bird deterrent measures. Overall, our results show the potential negative impact of bird deterrent measures on populations dependent on landfill food, and highlight the importance of assessing the effect of these techniques beyond the site to determine their appropriateness. Due to the imminent closure of landfills and the expected worsening consequences of climate change, monitoring programmes should be established to determine the long-term effects of bird deterrent measures and unusual environmental conditions on White Stork populations.

在堆填区的阻鸟措施降低了白鹳的繁殖能力。
垃圾填埋场为鸟类提供了丰富而可预测的食物来源。由于垃圾填埋场觅食所节省的能量和时间对鸟类繁殖种群的分布和繁殖参数产生了积极的影响。然而,随着垃圾填埋场的出现,人口的激增往往加剧了人类与野生动物的冲突,并加剧了废物与环境之间的联系。在这种情况下,马德里(西班牙)的一个垃圾填埋场于2021年实施了威慑措施,旨在减少鸟类涌入其设施。本研究旨在描述垃圾填埋场食物资源的可及性和可用性的减少可能对周围白鹳繁殖种群产生的影响。为此,我们分析了三个不同堆填区利用指数的种群在实施阻鸟措施前后的繁殖参数。在采取阻鸟措施后,距离最近的鸟群在繁殖季节雏鸟的生产力急剧下降,而它们的堆填区使用指数最高。另一方面,一个繁殖季节的干旱对部分和完全依赖自然食物资源(分别位于离垃圾填埋场中远和远的地方)的种群的生产力产生了负面影响。垃圾填埋场觅食可能减轻了这次干旱造成的自然食物短缺的后果,即使采用了阻鸟措施。总体而言,我们的研究结果显示了阻鸟措施对依赖垃圾填埋场食物的种群的潜在负面影响,并强调了评估这些技术在场地之外的影响以确定其适当性的重要性。由于堆填区即将关闭,而气候变化的后果预期会恶化,因此应制定监测计划,以确定阻鸟措施和异常环境条件对白鹳种群的长期影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ibis
Ibis 生物-鸟类学
CiteScore
4.60
自引率
9.50%
发文量
118
审稿时长
6-12 weeks
期刊介绍: IBIS publishes original papers, reviews, short communications and forum articles reflecting the forefront of international research activity in ornithological science, with special emphasis on the behaviour, ecology, evolution and conservation of birds. IBIS aims to publish as rapidly as is consistent with the requirements of peer-review and normal publishing constraints.
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