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6. Social signal manipulation and environmental challenges have independent effects on physiology, internal microbiome, and reproductive performance in tree swallows (Tachycineta bicolor).

Author

Taff, Conor C., McNew, Sabrina M., Zimmer, Cedric, Uehling, Jennifer J., Houtz, Jennifer L., Ryan, Thomas A., Chang van Oordt, David, Injaian, Allison S., and Vitousek, Maren N.

Subjects
PHYSIOLOGY, SOCIAL context, BIRDHOUSES, SENSOR networks, DEGLUTITION, AVATARS (Virtual reality)
Abstract

The social environment that individuals experience appears to be a particularly salient mediator of stress resilience, as the nature and valence of social interactions are often related to subsequent health, physiology, microbiota, and overall stress resilience. Relatively few studies have simultaneously manipulated the social environment and ecological challenges under natural conditions. Here, we report the results of experiments in wild tree swallows (Tachycineta bicolor) in which we manipulated both ecological challenges (predator encounters and flight efficiency reduction) and social interactions (by experimental dulling of a social signal). In two experiments conducted in separate years, we reversed the order of these treatments so that females experienced either an altered social signal followed by a challenge or vice‐versa. Before, during, and after treatments were applied, we tracked breeding success, morphology and physiology (mass, corticosterone, and glucose), nest box visits via an RFID sensor network, cloacal microbiome diversity, and fledging success. Overall, we found that predator exposure during the nestling period reduced the likelihood of fledging and that signal manipulation sometimes altered nest box visitation patterns, but little evidence that the two categories of treatment interacted with each other. We discuss the implications of our results for understanding what types of challenges and what conditions are most likely to result in interactions between the social environment and ecological challenges. [ABSTRACT FROM AUTHOR]

Published
2023
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7. Joint effects of social interactions and environmental challenges on physiology, internal microbiome, and reproductive performance in tree swallows (Tachycineta bicolor)

Author

Taff, Conor C., primary, McNew, Sabrina M., additional, Zimmer, Cedric, additional, Uehling, Jennifer J., additional, Houtz, Jennifer L., additional, Ryan, Thomas A., additional, van Oordt, David Chang, additional, Injaian, Allison S., additional, and Vitousek, Maren N., additional

Published
2023
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11. Baseline and stress-induced corticosterone levels across birds and reptiles do not reflect urbanization levels

Author

Injaian, Allison S, Francis, Clinton D, Ouyang, Jenny Q, Dominoni, Davide M, Donald, Jeremy W, Fuxjager, Matthew J, Goymann, Wolfgang, Hau, Michaela, Husak, Jerry F, Johnson, Michele A, Kircher, Bonnie K, Knapp, Rosemary, Martin, Lynn B, Miller, Eliot T, Schoenle, Laura A, Williams, Tony D, Vitousek, Maren N, Injaian, Allison S, Francis, Clinton D, Ouyang, Jenny Q, Dominoni, Davide M, Donald, Jeremy W, Fuxjager, Matthew J, Goymann, Wolfgang, Hau, Michaela, Husak, Jerry F, Johnson, Michele A, Kircher, Bonnie K, Knapp, Rosemary, Martin, Lynn B, Miller, Eliot T, Schoenle, Laura A, Williams, Tony D, and Vitousek, Maren N

Abstract

Rates of human-induced environmental change continue increasing with human population size, potentially altering animal physiology and negatively affecting wildlife. Researchers often use glucocorticoid concentrations (hormones that can be associated with stressors) to gauge the impact of anthropogenic factors (e.g. urbanization, noise and light pollution). Yet, no general relationships between human-induced environmental change and glucocorticoids have emerged. Given the number of recent studies reporting baseline and stress-induced corticosterone (the primary glucocorticoid in birds and reptiles) concentrations worldwide, it is now possible to conduct large-scale comparative analyses to test for general associations between disturbance and baseline and stress-induced corticosterone across species. Additionally, we can control for factors that may influence context, such as life history stage, environmental conditions and urban adaptability of a species. Here, we take a phylogenetically informed approach and use data from HormoneBase to test if baseline and stress-induced corticosterone are valid indicators of exposure to human footprint index, human population density, anthropogenic noise and artificial light at night in birds and reptiles. Our results show a negative relationship between anthropogenic noise and baseline corticosterone for birds characterized as urban avoiders. While our results potentially indicate that urban avoiders are more sensitive to noise than other species, overall our study suggests that the relationship between human-induced environmental change and corticosterone varies across species and contexts; we found no general relationship between human impacts and baseline and stress-induced corticosterone in birds, nor baseline corticosterone in reptiles. Therefore, it should not be assumed that high or low levels of exposure to human-induced environmental change are associated with high or low corticosterone levels, respectively, or that clo

Published
2020

12. Baseline and stress-induced corticosterone levels across birds and reptiles do not reflect urbanization levels

Author

Injaian, Allison S, primary, Francis, Clinton D, additional, Ouyang, Jenny Q, additional, Dominoni, Davide M, additional, Donald, Jeremy W, additional, Fuxjager, Matthew J, additional, Goymann, Wolfgang, additional, Hau, Michaela, additional, Husak, Jerry F, additional, Johnson, Michele A, additional, Kircher, Bonnie K, additional, Knapp, Rosemary, additional, Martin, Lynn B, additional, Miller, Eliot T, additional, Schoenle, Laura A, additional, Williams, Tony D, additional, and Vitousek, Maren N, additional

Published
2020
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15. Sounds Wild and Broken : Sonic Marvels, Evolution's Creativity, and the Crisis of Sensory Extinction

Author

David George Haskell and David George Haskell

Subjects
Sound--Physiological effect, Acoustic phenomena in nature--Environmental aspects, Bioacoustics--Environmental aspects, Nature sounds--Environmental aspects
Abstract

Finalist for the 2023 Pulitzer Prize in General Nonfiction and the 2023 PEN/E.O. Wilson Literary Science Writing AwardWinner of the Acoustical Society of America's 2023 Science Communication Award“[A] glorious guide to the miracle of life's sound.” —The New York Times Book Review A lyrical exploration of the diverse sounds of our planet, the creative processes that produced these marvels, and the perils that sonic diversity now facesWe live on a planet alive with song, music, and speech. David Haskell explores how these wonders came to be. In rain forests shimmering with insect sound and swamps pulsing with frog calls we learn about evolution's creative powers. From birds in the Rocky Mountains and on the streets of Paris, we discover how animals learn their songs and adapt to new environments. Below the waves, we hear our kinship to beings as different as snapping shrimp, toadfish, and whales. In the startlingly divergent sonic vibes of the animals of different continents, we experience the legacies of plate tectonics, the deep history of animal groups and their movements around the world, and the quirks of aesthetic evolution. Starting with the origins of animal song and traversing the whole arc of Earth history, Haskell illuminates and celebrates the emergence of the varied sounds of our world. In mammoth ivory flutes from Paleolithic caves, violins in modern concert halls, and electronic music in earbuds, we learn that human music and language belong within this story of ecology and evolution. Yet we are also destroyers, now silencing or smothering many of the sounds of the living Earth. Haskell takes us to threatened forests, noise-filled oceans, and loud city streets, and shows that sonic crises are not mere losses of sensory ornament. Sound is a generative force, and so the erasure of sonic diversity makes the world less creative, just, and beautiful. The appreciation of the beauty and brokenness of sound is therefore an important guide in today's convulsions and crises of change and inequity. Sounds Wild and Broken is an invitation to listen, wonder, belong, and act.

Published
2022

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