International Journal of Molecular Ecology and Conservation 2024, Vol.14, No.5, 234-240 http://ecoevopublisher.com/index.php/ijmec 234 Review and Perspectives Open Access The Impact of Urbanization on Bird Species Adaptive Traits and Survival Jia Chen, Yanlin Wang Tropical Animal Resources Research Center, Hainan Institute of Tropical Agricultural Resources, Sanya, 572000, Hainan, China Corresponding author: jia.chen@hitar.org International Journal of Molecular Ecology and Conservation, 2024, Vol.14, No.5 doi: 10.5376/ijmec.2024.14.0025 Received: 15 Aug., 2024 Accepted: 21 Sep., 2024 Published: 11 Oct., 2024 Copyright © 2024 Chen and Wang, This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Preferred citation for this article: Chen J., and Wang Y.L., 2024, The impact of urbanization on bird species adaptive traits and survival, International Journal of Molecular Ecology and Conservation, 14(5): 234-240 (doi: 10.5376/ijmec.2024.14.0025) Abstract This study provides a systematic review of the behavioral, morphological, physiological, and genetic adaptation strategies exhibited by birds in urban environments. The findings indicate that urban birds tend to display foraging flexibility, adjusted breeding strategies, altered vocal frequencies, and the ability to utilize urban microclimates and artificial structures. Increasing evidence also reveals rapid evolutionary changes and genetic divergence between urban and rural bird populations. At the same time, birds in cities face numerous challenges, including elevated predation risk, intensified pollution effects, competition with invasive species, and compounded impacts from climate change. Using the European Blackbird (Turdus merula) as a case study, this paper explores its adaptive pathway in urban settings and proposes conservation strategies for urban bird populations, including green space optimization, pollution mitigation, and public engagement. This study contributes to a deeper understanding of avian adaptive mechanisms in urban ecosystems and offers theoretical and practical insights for future urban biodiversity conservation. Keywords Urbanization; Avian adaptation; Behavioral ecology; Genetic divergence; Biodiversity conservation 1 Introduction As global urbanization accelerates, changes in urban environments pose a significant threat to biodiversity. However, urbanization also provides a unique opportunity to study how organisms adapt and evolve in new environments (Isaksson, 2018). Birds, as a well-studied taxonomic group, exhibit diverse and complex adaptive responses to urban settings. The study by Mascarenhas et al. (2022) indicates that environmental changes driven by urbanization may promote local adaptation in birds, particularly in behavioral and physiological traits. Understanding how birds adapt to urban environments not only contributes to biodiversity conservation but also provides scientific insights for urban ecosystem management and policy development (Alexandrino et al., 2019). Urbanization represents an extreme transformation of natural habitats into artificial environments, leading to severe habitat fragmentation and biodiversity loss. During the process of urbanization, many bird populations decline, and some species even disappear. However, certain species manage to survive and even thrive in urban settings (Martin and Bonier, 2018). Selective pressures in urban environments, such as air pollution, artificial lighting, noise, and human disturbances, drive significant phenotypic changes in some bird species (Caizergues et al., 2022). This study aims to analyze existing literature to explore the impact of urbanization on birds’ adaptive traits and survival, identifying which traits contribute to their persistence in urban environments and how these changes reflect evolutionary processes. By uncovering the effects of urbanization on bird population dynamics and ecological niches, this study seeks to provide new perspectives and insights for future urban ecology research and biodiversity conservation strategies. 2 Urbanization as a Driver of Environmental Change 2.1 Key characteristics of urban environments Urban areas are characterized by impervious surfaces, high human density, and pollution, which collectively create a distinct ecological setting (Leveau and Ibáñez, 2022). These environments often favor bird species with specific traits, such as nesting in buildings and having uniform plumage, which help them exploit urban resources and avoid predation. Urban birds tend to be generalists with large niche breadths, allowing them to adapt to the diverse and fluctuating resources available in cities (Callaghan et al., 2019).
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