Endocrinology of thermoregulation in birds in a changing climate

Ruuskanen, Suvi; Hsu, Bin-Yan; Nord, Andreas

doi:10.1016/j.mce.2020.111088

Cited by 60 publications

(74 citation statements)

References 180 publications

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“…This overarching hypothesis is similar to the "supportive" hypothesis previously proposed to explain variation in baseline GCs and the scope of the acute stress response (Vitousek et al, 2019); however, we anticipate that the specific environmental and life history contexts that most strongly favor a rapid response versus a high scope response will differ. Because of the role of GCs in mediating thermoregulation through metabolic effects and the response to environmental challenges (Debonne et al, 2008;e.g., Jessop et al, 2016;Ruuskanen et al, 2021) we predict that:…”

Section: The Environmental and Life History Predictors Of Rapid Gc Responsesmentioning

confidence: 67%

The relative speed of the glucorticoid stress response varies independently of scope and is predicted by environmental variability and longevity across birds

Taff

Wingfield

Vitousek

2021

Preprint

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The acute glucocorticoid response is a key mediator of the coordinated vertebrate response to unpredictable challenges. Rapid increases in glucocorticoids initiate a series of changes that can allow animals to effectively cope with or avoid stressors. It has become clear that the scope of the GC response-defined here as the absolute increase in GCs-is often associated with among-individual differences in performance and fitness and varies across species based on environment and life history. In addition to varying in scope, GC responses can differ enormously in speed; however, relatively little is known about whether speed and scope covary or how selection shapes variation in speed. We used a database of corticosterone samples collected at 5 time points from 1,750 individuals of 58 species of birds to ask i) how the speed and scope of the GC response covary among individuals and species and ii) whether variation among species in the speed of the response is predicted by environmental context or key life history traits. As predicted by a recent optimality model, faster absolute GC responses were strongly associated with a larger scope both among-individuals and among-species. Despite this covariation, the relative speed of the GC response (as a percentage of scope) varied independently of scope, suggesting that selection could operate on both features of the response independently. Species with faster relative GC responses lived in locations with more intra-season variation in temperature and had shorter lifespans. Our results suggest that rapid changes associated with the speed of the GC response, such as those occurring through non-genomic receptors, might be an important determinant of coping ability and we emphasize the need for studies explicitly designed to measure speed independently of scope.

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Section: The Environmental and Life History Predictors Of Rapid Gc Responsesmentioning

confidence: 67%

The relative speed of the glucorticoid stress response varies independently of scope and is predicted by environmental variability and longevity across birds

Taff

Wingfield

Vitousek

2021

Preprint

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“…varying levels of DNA methylation as found in zebra nches exposed to different ambient temperatures during early life (Sheldon et al 2020). A potential speci c mechanism might be epigenetic effects during the ontogeny of the hypothalamus-pituitary-thyroid (HPT) axis (Tzschenke 2008;Loyau et al 2014;Ruuskanen et al 2021).…”

Section: Discussionmentioning

confidence: 99%

Prehatching Temperatures Drive Interannual Cohort Differences In Great Tit Metabolism

Broggi

Hohtola

Koivula

et al. 2021

Preprint

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Basal metabolic rate (BMR) constitutes the lowest metabolic rate in a resting animal and is therefore considered to reflect the energetic cost of maintenance in endotherms. BMR is a reversible plastic trait that changes with environmental and ecological circumstances, albeit being heritable and susceptible to selection. Inter-individual variation within populations of small birds is substantial, and while many of the drivers of such variation have been identified, many remain unexplained. Some of the variation can be ascribed to cohort effects, indicating non-reversible developmental plasticity that will shape the adult metabolic phenotype. We studied winter BMR variation of juveniles over a fifteen-year period in a wild population of great tits Parus major at the northern border of their distribution. Here we show for the first time that winter BMR in cohorts of great tits changes among winters as a response to minimum ambient temperatures experienced early in life, during the prehatching period. This developmental plasticity might be adaptive if temperatures experienced by growing embryos would metabolically prime them to an environment that they will likely encounter in future life. However, in line with a more unpredictable future climate, the risk of phenotype-environment mismatch is likely to lead to certain cohorts being poorly adapted to prevailing winter conditions, resulting in wider annual fluctuations in population size.

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“…Temperature increase alters avian phenotypes such as advanced reproduction, migration schedules and individual appearance. Bird ability to maintain a stable body temperature in a wide range of thermal environments is regulated via endocrine pathways including TH and with a lesser extent CS (Ruuskanen et al, 2021). The knowledge on endocrine regulation of thermogenesis concerns mainly poultry, but poorly describe for environmental temperature variation.…”

Section: Climate Changes and Terrestrial Biodiversitymentioning

confidence: 99%

Interdependence of Thyroid and Corticosteroid Signaling in Vertebrate Developmental Transitions

2021

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Post-embryonic acute developmental processes mainly allow the transition from one life stage in a specific ecological niche to the next life stage in a different ecological niche. Metamorphosis, an emblematic type of these post-embryonic developmental processes, has occurred repeatedly and independently in various phylogenetic groups throughout metazoan evolution, such as in cnidarian, insects, molluscs, tunicates, or vertebrates. This review will focus on metamorphoses and developmental transitions in vertebrates, including typical larval metamorphosis in anuran amphibians, larval and secondary metamorphoses in teleost fishes, egg hatching in sauropsids and birth in mammals. Two neuroendocrine axes, the hypothalamic-pituitary-thyroid and the hypothalamic-pituitary-adrenal/interrenal axes, are central players in the regulation of these life transitions. The review will address the molecular and functional evolution of these axes and their interactions. Mechanisms of integration of internal and environmental cues, and activation of these neuroendocrine axes represent key questions in an “eco-evo-devo” perspective of metamorphosis. The roles played by developmental transitions in the innovation, adaptation, and plasticity of life cycles throughout vertebrates will be discussed. In the current context of global climate change and habitat destruction, the review will also address the impact of environmental factors, such as global warming and endocrine disruptors on hypothalamic-pituitary-thyroid and hypothalamic-pituitary-adrenal/interrenal axes, and regulation of developmental transitions.

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Endocrinology of thermoregulation in birds in a changing climate

Cited by 60 publications

References 180 publications

The relative speed of the glucorticoid stress response varies independently of scope and is predicted by environmental variability and longevity across birds

The relative speed of the glucorticoid stress response varies independently of scope and is predicted by environmental variability and longevity across birds

Prehatching Temperatures Drive Interannual Cohort Differences In Great Tit Metabolism

Interdependence of Thyroid and Corticosteroid Signaling in Vertebrate Developmental Transitions

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