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Why do some bird species incorporate more anthropogenic materials into their nests than others? | LitMetric

Why do some bird species incorporate more anthropogenic materials into their nests than others?

Philos Trans R Soc Lond B Biol Sci

Department of Zoology, Faculty of Sciences, University of Granada, E-18071 Granada, Spain.

Published: August 2023

AI Article Synopsis

  • * While these materials can offer benefits, such as attracting mates and protecting against pests, they also carry risks like causing offspring entanglement and reducing nest insulation.
  • * The study analyzed various bird species to understand why they use anthropogenic materials, finding that factors like sexual dimorphism and nest type play a role, supporting the idea that these materials showcase the builder's quality, but rejecting some other explanations.

Article Abstract

Many bird species incorporate anthropogenic materials (e.g. sweet wrappers, cigarette butts and plastic strings) into their nests. Anthropogenic materials have become widely available as nesting materials in marine and terrestrial environments globally. These human-made objects can provide important benefits to birds such as serving as reliable signals to conspecifics or protecting against ectoparasites, but they can also incur fundamental survival and energetic costs via offspring entanglement and reduced insulative properties, respectively. From an ecological perspective, several hypotheses have been proposed to explain the use of anthropogenic nest materials (ANMs) by birds but no previous interspecific study has tried to identify the underlying mechanisms of this behaviour. In this study, we performed a systematic literature search and ran phylogenetically controlled comparative analyses to examine interspecific variation in the use of ANM and to examine the influence of several ecological and life-history traits. We found that sexual dimorphism and nest type significantly influenced the use of ANMs by birds providing support for the 'signalling hypothesis' that implies that ANMs reflect the quality of the nest builder. However, we found no support for the 'age' and 'new location' hypotheses, nor for a phylogenetic pattern in this behaviour, suggesting that it is widespread throughout birds. This article is part of the theme issue 'The evolutionary ecology of nests: a cross-taxon approach'.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10331902PMC
http://dx.doi.org/10.1098/rstb.2022.0156DOI Listing

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