Urbanization alters the geographic patterns of passerine plumage color in China

Landscape and Urban Planning, Journal Year: 2024, Volume and Issue: 248, P. 105101 - 105101

Published: April 26, 2024

Language: Английский

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Urbanisation impacts plumage colouration in a songbird across Europe: Evidence from a correlational, experimental and meta‐analytical approach

Journal of Animal Ecology, Journal Year: 2023, Volume and Issue: 92(10), P. 1924 - 1936

Published: Aug. 13, 2023

Abstract Urbanisation is accelerating across the globe, transforming landscapes, presenting organisms with novel challenges, shaping phenotypes and impacting fitness. Urban individuals are claimed to have duller carotenoid‐based colouration, compared their non‐urban counterparts, so‐called ‘ urban dullness ’ phenomenon. However, at intraspecific level, this generalisation surprisingly inconsistent often based on comparisons of single urban/non‐urban populations or studies from a limited geographical area. Here, we combine correlational, experimental meta‐analytical data common songbird, great tit Parus major , investigate plumage colouration in forest Europe. We find that, as predicted, paler than individuals, although there large population‐specific differences magnitude urban‐forest contrast colouration. Using one focal region (Malmö, Sweden), reveal processes behind differences, which unlikely be result genetic early‐life conditions, but instead consequence environmental factors acting after fledging. Finally, our meta‐analysis indicates that phenomenon well established literature, for tits, consistent changes traits, particularly carotenoid chroma, response anthropogenic disturbances. Overall, results provide evidence uniformity also highlight effect depends local characteristics. Future long‐term replicated studies, covering wider range species feeding guilds, will essential further understanding eco‐evolutionary implications

Language: Английский

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Variation in Plumage Coloration of Rosy‐Faced Lovebirds (Agapornis roseicollis): Links to Sex, Age, Nutritional Condition, Viral Infection, and Habitat Urbanization

Journal of Experimental Zoology Part A Ecological and Integrative Physiology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 16, 2024

ABSTRACT Expression of vibrant plumage color plays important communication roles in many avian clades, ranging from penguins to passerines, but comparatively less is known about signals parrots (order Psittaciformes). We measured variation coloration three patches (red face, blue rump, red tail) an introduced population rosy‐faced lovebirds ( Agapornis roseicollis ) Phoenix, Arizona, USA and examined differences between the sexes ages as well relationships with several indices quality, including disease presence/absence (infection beak feather disease, Circovirus parrot , a polyomavirus, Gammapolyomavirus avis ), nutritional state (e.g., blood glucose ketone levels), habitat type which birds were captured. found that different colors linked quality indices: (a) adults had redder faces than juveniles, brighter lower levels likely have polyomavirus; (b) males bluer rumps females; (c) caught farther city darker tail feathers those closer urban center. Our findings reveal diverse information underlying expression these disparate, ornate traits species, suggest condition‐dependent and/or sexually dichromatic features may serve intraspecific signaling (i.e., mediating rival competitions or mate choices).

Language: Английский

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Ornamentation and body condition, but not glucocorticoids, predict wild songbird cloacal microbiome community and diversity

Oikos, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

Animal populations can exhibit dramatic variation in individual fitness, and microbiota are emerging as a potentially understudied factor influencing host health. Bacterial diversity community structure of the gut microbiome associated with many aspects fitness animals, but relatively little is known about generality these relationships wild non‐mammalian taxa. We studied northern cardinal Cardinalis cardinalis , member taxon that ecologically important underrepresented research: songbirds. To test for between we sampled cloacal microbiomes cardinals measured body condition index, assessed coloration sexual ornaments (beak plumage), collected blood to estimate glucocorticoid response stress. Both alpha beta bacterial were related several ornaments, not concentrations. Our results from free‐living songbird population add growing research linking avian internal characteristics. This study sets stage manipulative experiments determine how challenges may upset relationships.

Language: Английский

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Multiple ornaments: trade-offs and redundancy in signalling functions in male and female varied tits (Sittiparus varius)

Biological Journal of the Linnean Society, Journal Year: 2023, Volume and Issue: 143(1)

Published: Oct. 13, 2023

Abstract Signals conveyed by ornaments can be indicators in the process of sexual selection. Specifically, signals may superimposed on each other to represent an individual’s quality, convey different information, or offer redundant information. As much research this area has focused relationships between diverse males, those females have largely been overlooked. From 2022 2023, we tested whether three traits, namely acoustic (song display) and visual (patch size carotenoid-based plumage coloration), morphology (wing tail length), were interrelated males a wild population varied tits (Sittiparus varius). We found that with brighter more reddish sang at lower maximum minimum frequencies, narrower bandwidths frequency peaks. Similarly, negative correlation length coloration was observed both sexes. Furthermore, positive relationship within traits. These results highlight trade-offs as well consistency same

Language: Английский

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