Two sides of a coin: ecological and chronobiological perspectives of timing in the wild

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2017, Volume and Issue: 372(1734), P. 20160246 - 20160246

Published: Oct. 9, 2017

Most processes within organisms, and most interactions between organisms their environment, have distinct time profiles. The temporal coordination of such is crucial across levels biological organization, but disciplines differ widely in approaches to study timing. Such differences are accentuated ecologists, who centrally concerned with a holistic view an organism relation its external chronobiologists, emphasize internal timekeeping the mechanisms adjustment environment. We argue that ecological chronobiological perspectives complementary, studies at intersection will enable both fields jointly overcome obstacles currently hinder progress. However, achieve this integration, we first cross some conceptual barriers, clarifying prohibitively inaccessible terminologies. critically assess main assumptions concepts either field, as well common interests. Both intersect need understand extent regulation plasticity, concept 'chronotype', i.e. characteristic properties individuals which targets natural sexual selection. then highlight promising developments, point out open questions, acknowledge difficulties propose directions for further integration through Wild Clock research.This article part themed issue 'Wild Clocks: integrating chronobiology ecology free-living animals'.

Language: Английский

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Arctic Geese Tune Migration to a Warming Climate but Still Suffer from a Phenological Mismatch

Current Biology, Journal Year: 2018, Volume and Issue: 28(15), P. 2467 - 2473.e4

Published: July 20, 2018

Language: Английский

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Timing avian long-distance migration: from internal clock mechanisms to global flights

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2017, Volume and Issue: 372(1734), P. 20160252 - 20160252

Published: Oct. 9, 2017

Migratory birds regularly perform impressive long-distance flights, which are timed relative to the anticipated environmental resources at destination areas that can be several thousand kilometres away. Timely migration requires diverse strategies and adaptations involve an intricate interplay between internal clock mechanisms conditions across annual cycle. Here we review what challenges face during long migrations keep track of time as they exploit geographically distant may vary in availability predictability, summarize enable them succeed. We examine following challenges: departing for spring autumn migration, anticipation future conditions; using clocks on move, example orientation, navigation stopover; adhering to, or adjusting, programme while fitting their activities into cycle; keeping pace with a world rapidly changing environments. then elaborate these themes by case studies representing migrating different movement patterns associated circannual programmes. discuss current knowledge how endogenous programmes interact external information cycle, components cycle encode topography range expansions, fitness affected when mismatches timing occur. Lastly, outline open questions propose research directions. This article is part themed issue ‘Wild clocks: integrating chronobiology ecology understand timekeeping free-living animals’.

Language: Английский

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Rapid plastic breeding response to rain matches peak prey abundance in a tropical savanna bird

Journal of Animal Ecology, Journal Year: 2019, Volume and Issue: 88(11), P. 1799 - 1811

Published: Aug. 12, 2019

Changes in climate are shifting the timing of life cycle events natural world. Compared to northern temperate areas, these effects relatively poorly understood tropical and southern regions, where there is limited information on how breeding food availability affected by climatic factors, patterns activity more unpredictable within between years. Combining a new statistical modelling approach with 5 years continuous individual-based monitoring monsoonal insectivorous bird, we quantified (a) proximate drivers at two trophic levels: abundance arthropod prey; (b) effect variation reproductive output (c) role individual plasticity. Rainfall was identified as main determinant phenology both levels. Throughout year, likelihood egg laying increased very rapidly response even small amounts rain during preceding 0-3 weeks. Adult body mass male sperm storage also after rain, suggesting high preparedness. Additionally, females were flexible, since they likely nest whether their previous attempt longer ago unsuccessful. Arthropod rainfall, but slowly, peak around 10 Therefore, coincided presence dependent fledglings. Fitness benefits nesting appeared be linked offspring quantity rather than quality: attempts following higher rainfall produced larger clutches, showed no improvement nestling or relative fledging success. The clutch size plastic, repeated sampling that laid clutches possibly mediated improved mass. Rapid, individually flexible slower increase might buffer species living seasonal environments from change-induced phenological mismatches.

Language: Английский

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Behavioural heat‐stress compensation in a cold‐adapted ungulate: Forage‐mediated responses to warming Alpine summers

Ecology Letters, Journal Year: 2021, Volume and Issue: 24(8), P. 1556 - 1568

Published: May 24, 2021

Abstract Alpine large herbivores have developed physiological and behavioural mechanisms to cope with fluctuations in climate resource availability that may become maladaptive under warming. We tested this hypothesis female ibex ( Capra ) by modelling annual daily movement activity patterns relation temperature, vegetation productivity reproductive status based on bio‐logging data change projections. In summer, moved upslope, tracking the green wave. Ibex decreased diel sharply above a threshold temperature of 13–14°C, indicating thermal stress, but compensated behaviourally foraging both earlier later day, moving further upslope than cooler days, especially females. This critical will be exceeded three times as often Under such scenarios, altitudinal extent area limit available habitat providing shelter, potentially impacting performance population distribution emblematic mountain ungulate.

Language: Английский

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Variation in movement strategies: Capital versus income migration

Journal of Animal Ecology, Journal Year: 2022, Volume and Issue: 91(10), P. 1961 - 1974

Published: Aug. 13, 2022

Animal migrations represent the regular movements of trillions individuals. The scale these has inspired human intrigue for millennia and been intensively studied by biologists. This research highlighted diversity migratory strategies seen across within taxa: while some migrants temporarily express phenotypes dedicated to travel, others show little or no phenotypic flexibility in association with migration. However, a vocabulary describing contrasting solutions performance trade-offs inherent highly dynamic lifestyle (and intermediate between two extremes) is currently missing. We propose taxon-independent organising framework based on energetics, distinguishing that forage as they travel (income migrants) those fuel migration using energy acquired before departure (capital migrants). Not only does our capital:income continuum energetics account variable extent migrant populations, but it also aligns theoreticians' treatment clarifies how impacts other phases life cycle. As such, provides unifying common vacabulary comparing divergent taxa.

Language: Английский

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Survival of the fattest: How body fat and migration influence survival in highly seasonal environments

Functional Ecology, Journal Year: 2022, Volume and Issue: 36(10), P. 2569 - 2579

Published: July 27, 2022

Abstract Energy stores and migration are important adaptations for animals in seasonal environments, but their roles may vary relative to an animal's endogenous exogenous environment. In partially migratory populations, migrants residents experience different environments; thus, the influence of energy on survival differ tactic, with potential consequences fitness. Using data from Sierra Nevada bighorn sheep ( Ovis canadensis sierrae ; hereafter, bighorn), we tested hypothesis that body fat (energy stores) buffers against environment, buffering capacity differs across environments experienced by high‐elevation (using a single range year‐round), traditional (making 1 round‐trip movement between high‐ low‐elevation ranges during winter) vacillating ≥2 round trips winter). We predicted that: high levels fat, would be regardless tactic; require larger survive than migrants; least influential migrants. High autumn (≥14% females ≥19% males) largely buffered harsh (survival >0.90) tactic. At lower had higher residents. Vacillating exhibited nearly 100% no detectable effect survival. Collectively, these results support differed environment highly flexible behaviours (i.e. migration) can allow decouple fat. Our work reveals synergies physiological behavioural carry fitness individuals demographic populations. Interactions among key understanding nutritional prerequisites persistence variable environments. Read free Plain Language Summary this article Journal blog.

Language: Английский

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Nutrition regulates reproductive senescence and terminal investment across the reproductive cycle of a long-lived mammal

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 10, 2025

Deterioration in nutritional condition with aging could reduce reproductive success but coincides declines residual potential, thus invoking opposing expectations for late-life reproduction. Yet, the mechanisms regulating energy accrual and allocation to reproduction survival throughout lifetime of long-lived, iteroparous animals have remained elusive owing variation energetic costs across their extended cycle (from conception juvenile independence). Using 10 years repeated measures both nutrition (i.e., body fat food availability) 232 free-ranging, adult, female mule deer, we revealed that is a critical piece understanding patterns senescence terminal investment. From weaning, age-related were influenced by environmental conditions. Reproductive was clear entire cycle, although offspring partly mediated nutrition. Terminal investment, however, most evident towards end annual unveiled only when considering availability; during poor resource availability, older mothers raised larger juveniles 6-months old). Our work evokes as lurking variable end-of-life tactics long-lived animals, while demonstrating necessity accounting investment wild animals.

Language: Английский

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Persistent, bioaccumulative, and toxic pollutants in migratory waterbirds from Bohai Bay, China: Implications on distinct pollutant sources

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 967, P. 178782 - 178782

Published: Feb. 12, 2025

Language: Английский

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Unpacking the fitness consequences of a warmer spring on an overwintering butterfly

Basic and Applied Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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