Climate and ecology predict latitudinal trends in sexual selection inferred from avian mating systems.

IF 9.8 1区 生物学 Q1 Agricultural and Biological Sciences
PLoS Biology Pub Date : 2024-11-04 eCollection Date: 2024-11-01 DOI:10.1371/journal.pbio.3002856
Robert A Barber, Jingyi Yang, Chenyue Yang, Oonagh Barker, Tim Janicke, Joseph A Tobias
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引用次数: 0

Abstract

Sexual selection, one of the central pillars of evolutionary theory, has powerful effects on organismal morphology, behaviour, and population dynamics. However, current knowledge about geographical variation in this evolutionary mechanism and its underlying drivers remains highly incomplete, in part because standardised data on the strength of sexual selection is sparse even for well-studied organisms. Here, we use information on mating systems-including the incidence of polygamy and extra-pair paternity-to estimate the intensity of sexual selection in 10,671 (>99.9%) bird species distributed worldwide. We show that avian sexual selection varies latitudinally, peaking at higher latitudes, although the gradient is reversed in the world's most sexually selected birds-specialist frugivores-which are strongly associated with tropical forests. Phylogenetic models further reveal that the strength of sexual selection is explained by temperature seasonality coupled with a suite of climate-associated factors, including migration, diet, and territoriality. Overall, these analyses suggest that climatic conditions leading to short, intense breeding seasons, or highly abundant and patchy food resources, increase the potential for polygamy in birds, driving latitudinal gradients in sexual selection. Our findings help to resolve longstanding debates about spatial variation in evolutionary mechanisms linked to reproductive biology and also provide a comprehensive species-level data set for further studies of selection and phenotypic evolution in the context of global climatic change.

气候和生态学预测了从鸟类交配系统推断出的性选择的纬度趋势。
性选择是进化理论的核心支柱之一,对生物体的形态、行为和种群动态具有强大的影响。然而,目前对这一进化机制的地域差异及其内在驱动因素的了解还很不全面,部分原因是即使是对研究得很好的生物,有关性选择强度的标准化数据也很稀少。在这里,我们利用交配系统的信息--包括一夫多妻制和配对外父子关系的发生率--来估算分布在全球的 10671 种(>99.9%)鸟类的性选择强度。我们的研究表明,鸟类的性选择在纬度上各不相同,在高纬度地区达到顶峰,但在世界上性选择最强烈的鸟类--食俭鸟类--中,这种梯度是相反的,它们与热带森林密切相关。系统发生学模型进一步揭示了性选择的强度是由温度季节性和一系列气候相关因素(包括迁徙、饮食和领地性)共同解释的。总之,这些分析表明,导致短而密集的繁殖季节的气候条件,或高度丰富而分散的食物资源,增加了鸟类一夫多妻的可能性,推动了性选择的纬度梯度。我们的研究结果有助于解决长期以来关于与生殖生物学相关的进化机制的空间差异的争论,同时也为进一步研究全球气候变化背景下的选择和表型进化提供了全面的物种水平数据集。
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来源期刊
PLoS Biology
PLoS Biology BIOCHEMISTRY & MOLECULAR BIOLOGY-BIOLOGY
CiteScore
15.40
自引率
2.00%
发文量
359
审稿时长
3-8 weeks
期刊介绍: PLOS Biology is the flagship journal of the Public Library of Science (PLOS) and focuses on publishing groundbreaking and relevant research in all areas of biological science. The journal features works at various scales, ranging from molecules to ecosystems, and also encourages interdisciplinary studies. PLOS Biology publishes articles that demonstrate exceptional significance, originality, and relevance, with a high standard of scientific rigor in methodology, reporting, and conclusions. The journal aims to advance science and serve the research community by transforming research communication to align with the research process. It offers evolving article types and policies that empower authors to share the complete story behind their scientific findings with a diverse global audience of researchers, educators, policymakers, patient advocacy groups, and the general public. PLOS Biology, along with other PLOS journals, is widely indexed by major services such as Crossref, Dimensions, DOAJ, Google Scholar, PubMed, PubMed Central, Scopus, and Web of Science. Additionally, PLOS Biology is indexed by various other services including AGRICOLA, Biological Abstracts, BIOSYS Previews, CABI CAB Abstracts, CABI Global Health, CAPES, CAS, CNKI, Embase, Journal Guide, MEDLINE, and Zoological Record, ensuring that the research content is easily accessible and discoverable by a wide range of audiences.
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