Are urbanization and brood parasitism associated with differences in telomere lengths in song sparrows?

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-08-07 DOI:10.1111/jav.03220
Samuel J. Lane, Ben J. Vernasco, Taylor E. Fossett, Isaac J. VanDiest, Heather E. Watts, Kendra B. Sewall
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Abstract

Urbanization reflects a major form of environmental change impacting wild birds globally. Whereas urban habitats may provide increased availability of water, some food items, and reduced predation levels compared to rural, they can also present novel stressors including increased light at night, ambient noise, and reduced nutrient availability. Urbanization can also alter levels of brood parasitism, with some host species experiencing elevated levels of brood parasitism in urban areas compared to rural areas. Though the demographic and behavioral consequences of urbanization and brood parasitism have received considerable attention, their consequences for cellular‐level processes are less understood. Telomeres provide an opportunity to understand the cellular consequences of different environments as they are a well‐established metric of biological state that can be associated with residual lifespan, disease risk, and behavior, and are known to be sensitive to environmental conditions. Here we examine the relationships between urbanization, brood parasitism, and blood telomere lengths in adult and nestling song sparrows Melospiza melodia. Song sparrows are a North American songbird found in both urban and rural habitats that experience high rates of brood parasitism by brown‐headed cowbirds Molothrus ater in the urban, but not the rural, sites in our study system. Among adults and nestlings from non‐parasitized nests, we found no differences in relative telomere lengths between urban and rural habitats. However, among urban nestlings, the presence of a brood parasite in the nest was associated with significantly shorter relative telomere lengths compared to when a brood parasite was absent. Our results suggest a novel, indirect, impact of urbanization on nestling songbirds through the physiological impacts of brood parasitism.
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城市化和雏鸟寄生与鸣麻雀端粒长度的差异有关吗?
城市化是影响全球野生鸟类的一种主要环境变化形式。与农村地区相比,城市栖息地可能提供更多的水源、某些食物和更低的捕食水平,但它们也可能带来新的压力,包括夜间光照增加、环境噪声和营养供应减少。城市化也会改变雏鸟的寄生水平,一些寄主物种在城市地区的雏鸟寄生水平会高于农村地区。虽然城市化和雏鸟寄生对人口和行为产生的影响已受到广泛关注,但人们对它们对细胞水平过程产生的影响了解较少。端粒提供了一个了解不同环境对细胞造成的后果的机会,因为端粒是生物状态的一个公认指标,可以与剩余寿命、疾病风险和行为相关联,而且已知端粒对环境条件很敏感。在这里,我们研究了城市化、育雏寄生与成年和雏鸣麻雀(Melospiza melodia)血液端粒长度之间的关系。鸣麻雀是一种在城市和农村栖息地都能发现的北美鸣禽,在我们的研究系统中,城市而非农村地区的褐头牛鸝(Molothrus ater)的育雏寄生率很高。在未被寄生的巢中的成鸟和雏鸟中,我们发现城市和农村栖息地的相对端粒长度没有差异。然而,在城市雏鸟中,巢中有育雏寄生虫与没有育雏寄生虫时的相对端粒长度相比明显较短。我们的研究结果表明,城市化通过雏鸟寄生的生理影响对雏鸟产生了一种新的、间接的影响。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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