A mechanistic approach to understanding range shifts in a changing world: What makes a pioneer?

Wingfield, John C.; Krause, Jesse S.; Pérez, Jonathan H.; Chmura, Helen E.; Németh, Zoltán; Word, Karen R.; Calisi, Rebecca M.; Meddle, Simone

doi:10.1016/j.ygcen.2015.08.022

Cited by 32 publications

(28 citation statements)

References 70 publications

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“…These results suggest that the climatic zones at the edge of the current distribution range of zebra finches (i.e., temperate and tropical zones) correspond to suboptimal habitats, across which costs progressively surpass benefits. This suggests that zebra finches able to live in the tropical and the temperate zones may correspond to atypical birds able to maximize benefits relative to costs under suboptimal conditions (Wingfield et al, 2015). Consequently, using conditions currently occurring in the tropical or the temperate zone as a reference for studies conducted in captivity is unlikely to give a representative picture of the bulk of the species.…”

Section: Are Conditions In Captivity Stressful?mentioning

confidence: 99%

A Bird in the House: The Challenge of Being Ecologically Relevant in Captivity

Beaulieu

2016

Front. Ecol. Evol.

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In his recent paper Beaulieu (2016) suggested that the conditions in which zebra finches are housed in research laboratories do not represent conditions in the wild, and may be stressful. These findings were based on his consideration of some Australian climate data and the levels of corticosterone reported in a range of published studies. We think there are problems with both Beaulieu's (2016) perspective on climate and day length, and his treatment and interpretation of corticosterone data from the literature, and we disagree with his main conclusion that laboratory climatic and day length conditions are stressful for zebra finches. Beaulieu (2016) found that the average conditions under which laboratory zebra finches are held is at a temperature of 22.2 • C, with a humidity of 45.8% and with 13.8 h a day of light, and concluded that zebra finches "are housed under conditions that would be perceived as a paradoxical season in the wild." We agree that these conditions are representative of typical conditions in captivity. In their recent review (Griffith et al., 2017), also collated temperature, humidity, and day length across a number of representative laboratory studies and found to be similar to those presented by Beaulieu (2016): average temperature 20.7 • C ± 2.

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Section: Are Conditions In Captivity Stressful?mentioning

confidence: 99%

A Bird in the House: The Challenge of Being Ecologically Relevant in Captivity

Beaulieu

2016

Front. Ecol. Evol.

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“…Mounting a physiological stress response is crucial to coping with challenges; individuals that are unable to elevate glucocorticoids after exposure to a stressor often fail to mount an appropriate phenotypic response (Darlington, Chew, Ha, Keil, & Dallman, ; Thaker, Vanak, Lima, & Hews, ). Thus, individuals that show stronger HPA axis activity (e.g., higher circulating glucocorticoid levels) when facing major challenges are often predicted to have higher survival compared to those that mount a weaker response (Angelier & Wingfield, ; Wingfield et al, ). However, exposure to glucocorticoids can also be costly.…”

Section: Introductionmentioning

confidence: 99%

On again, off again: Acute stress response and negative feedback together predict resilience to experimental challenges

et al. 2019

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Individuals often vary markedly in their ability to cope with stressors, but the drivers of this variation remain poorly understood. Many studies have tested relationships among individual variation in glucocorticoid levels and the response to challenges—often finding inconsistent patterns; however, few have addressed whether variation in the capacity to terminate the stress response through negative feedback is associated with stress resilience. While conceptual models predict that interactions among different components of hypothalamic–pituitary–adrenal (HPA) axis regulation may be important predictors of the phenotypic and fitness effects of stress, we are aware of no previous experimental tests of this hypothesis. We investigate whether individual variation in HPA axis regulation is related to resilience to experimental challenges in free‐living tree swallows (Tachycineta bicolor). We mimicked salient natural challenges by temporarily reducing flight efficiency or increasing perceived predation risk during incubation, and determined whether HPA axis responsiveness prior to treatments predicted resilience. Females that exhibited both a robust HPA axis activation and strong negative feedback were less likely to abandon nests during incubation. Our results suggest that exhibiting a strong HPA axis activation coupled with effective negative feedback may predict stress resilience. Therefore, the ability to turn on and then off the HPA axis efficiently may be important for fitness. Our results also suggest that the interactions between different components of the HPA axis may provide greater insight into differences in stress coping capacity. A plain language summary is available for this article.

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“…This could be related to the stable conditions at AR, implying lower energy challenges than for birds inhabiting more heterogeneous environments such as FJ (Cavieres & Sabat, ). In the Northern Hemisphere, studies have found that individuals at sites with more benign conditions often have lower corticosterone levels than those at sites exposed to harsher condition (Addis, Davis, Miner, & Wingfield, ; Boelman et al., ; Krause, McGuigan, Bishop, Wingfield, & Meddle, ; Krause, Meddle, & Wingfield, ; Walker et al., ; Wingfield, Kubokawa, Ishida, Ishii, & Wada, ; Wingfield et al., ). However, in some species inhabiting harsh environments such as the arctic where the breeding season is short, CORT levels are low during the parental care, most likely to preserve the only possible reproductive attempt (O'Reilly & Wingfield, ).…”

Section: Discussionmentioning

confidence: 99%

“…This could be related to the stable conditions at AR, implying lower energy challenges than for birds inhabiting more heterogeneous environments such as FJ (Cavieres & Sabat, 2008). In the Northern Hemisphere, studies have found that individuals at sites with more benign conditions often have lower corticosterone levels than those at sites exposed to harsher condition (Addis, Davis, Miner, & Wingfield, 2011;Boelman et al, 2015;Krause, McGuigan, Bishop, Wingfield, & Meddle, 2015;Walker et al, 2015;Wingfield, Kubokawa, Ishida, Ishii, & Wada, 1995;Wingfield et al, 2015). TA B L E 2 (Continues) Wingfield, 2001).…”

Section: Hormone Levelsmentioning

confidence: 99%

Contrasting seasonal and aseasonal environments across stages of the annual cycle in the rufous‐collared sparrow, Zonotrichia capensis: Differences in endocrine function, proteome and body condition

González-Gómez

Echeverrı́a

Estades

et al. 2018

Journal of Animal Ecology

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The timing and duration of life-history stages (LHSs) within the annual cycle can be affected by local environmental cues which are integrated through endocrine signalling mechanisms and changes in protein function. Most animals express a single LHS within a given period of the year because synchronous expression of LHSs is thought to be too costly energetically. However, in very rare and extremely stable conditions, breeding and moult have been observed to overlap extensively in rufous-collared sparrows (Zonotrichia capensis) living in valleys of the Atacama Desert-one of the most stable and aseasonal environments on Earth. To examine how LHS traits at different levels of organization are affected by environmental variability, we compared the temporal organization and duration of LHSs in populations in the Atacama Desert with those in the semiarid Fray Jorge National Park in the north of Chile-an extremely seasonal climate but with unpredictable droughts and heavy rainy seasons. We studied the effects of environmental variability on morphological variables related to body condition, endocrine traits and proteome. Birds living in the seasonal environment had a strict temporal division of LHSs, while birds living in the aseasonal environment failed to maintain a temporal division of LHSs resulting in direct overlap of breeding and moult. Further, higher circulating glucocorticoids and androgen concentrations were found in birds from seasonal compared to aseasonal populations. Despite these differences, body condition variables and protein expression were not related to the degree of seasonality but rather showed a strong relationship with hormone levels. These results suggest that animals adjust to their environment through changes in behavioural and endocrine traits and may be limited by less labile traits such as morphological variables or expression of specific proteins under certain circumstances. These data on free-living birds shed light on how different levels of life-history organization within an individual are linked to increasing environmental heterogeneity.

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A mechanistic approach to understanding range shifts in a changing world: What makes a pioneer?

Cited by 32 publications

References 70 publications

A Bird in the House: The Challenge of Being Ecologically Relevant in Captivity

A Bird in the House: The Challenge of Being Ecologically Relevant in Captivity

On again, off again: Acute stress response and negative feedback together predict resilience to experimental challenges

Contrasting seasonal and aseasonal environments across stages of the annual cycle in the rufous‐collared sparrow, Zonotrichia capensis: Differences in endocrine function, proteome and body condition

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