Birds living near airports do not show consistently higher levels of feather corticosterone.

IF 2.6 3区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION
Conservation Physiology Pub Date : 2023-10-18 eCollection Date: 2023-01-01 DOI:10.1093/conphys/coad079
Renata D Alquezar, Lucía Arregui, Regina H Macedo, Diego Gil
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Abstract

Noise represents a threat to human and wildlife health, triggering physiological and behavioral challenges to individuals living close to sources of extreme noise. Here, we considered airport environments as sources of potentially stressful stimuli for birds and tested if those living near airports are under higher physiological stress than birds living in quiet sites. We used measurements of CORT in feathers (CORTf) as a proxy of chronic stress. We evaluated 14 passerine and 1 non-passerine species, living near three Brazilian airports. We found that, across species, individuals with a better body condition had lower CORTf concentration. At the species level, we found that CORTf concentration was not consistently affected by airport noise. Comparing individuals living in quiet sites with those living near airports, we found that 2 species had higher and 2 had lower CORTf concentrations near airports, while 11 species presented no significant differences between sites. At the population level, model selection indicated that the direction and strength of these differences are weakly related to species' song frequency (peak frequency), as lower-frequency singers tended to present higher CORTf levels at airport-affected sites. In summary, we were unable to find a consistent response among species, probably due to species-specific differences in their response to anthropogenic disturbances. Instead, we found that species might be affected differently according to their singing spectral frequency and that individuals in good body condition show lower CORTf, suggesting that this measure is consistent with lower physiological stress.

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生活在机场附近的鸟类的羽毛皮质酮水平并没有持续升高。
噪音对人类和野生动物的健康构成威胁,对生活在极端噪音源附近的个人带来生理和行为挑战。在这里,我们认为机场环境是鸟类潜在压力刺激的来源,并测试了生活在机场附近的鸟类是否比生活在安静场所的鸟类承受更高的生理压力。我们使用羽毛中CORT(CORTf)的测量值作为慢性压力的指标。我们评估了生活在巴西三个机场附近的14种雀形目和1种非雀形目物种。我们发现,在不同物种中,身体状况较好的个体的CORTf浓度较低。在物种水平上,我们发现CORTf浓度并不总是受到机场噪音的影响。比较生活在安静地点的个体和生活在机场附近的个体,我们发现2个物种在机场附近具有较高的CORTf浓度,2个物种具有较低的CORTf浓度,而11个物种在不同地点之间没有显著差异。在种群水平上,模型选择表明,这些差异的方向和强度与物种的歌声频率(峰值频率)弱相关,因为在受机场影响的地点,较低频率的歌手往往表现出较高的CORTf水平。总之,我们无法在物种之间找到一致的反应,可能是由于物种对人为干扰的反应存在特定差异。相反,我们发现,物种可能会因其歌唱频谱频率而受到不同的影响,身体状况良好的个体表现出较低的CORTf,这表明这一指标与较低的生理压力一致。
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来源期刊
Conservation Physiology
Conservation Physiology Environmental Science-Management, Monitoring, Policy and Law
CiteScore
5.10
自引率
3.70%
发文量
71
审稿时长
11 weeks
期刊介绍: Conservation Physiology is an online only, fully open access journal published on behalf of the Society for Experimental Biology. Biodiversity across the globe faces a growing number of threats associated with human activities. Conservation Physiology will publish research on all taxa (microbes, plants and animals) focused on understanding and predicting how organisms, populations, ecosystems and natural resources respond to environmental change and stressors. Physiology is considered in the broadest possible terms to include functional and mechanistic responses at all scales. We also welcome research towards developing and refining strategies to rebuild populations, restore ecosystems, inform conservation policy, and manage living resources. We define conservation physiology broadly and encourage potential authors to contact the editorial team if they have any questions regarding the remit of the journal.
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