Endogenous Programs and Flexibility in Bird Migration

Frontiers in Ecology and Evolution, Journal Year: 2020, Volume and Issue: 8

Published: March 26, 2020

Endogenous programs that regulate annual cycles have been shown for many taxa, including protists, arthropods, fish, mammals and birds. In migration biology, these are best known in songbirds. The majority of songbirds rely on a genetic program inherited from their parents will guide them during first solo-migration. phenotypic components the crucial individual fitness survival, include time components, direction, distance. This is constructed to both behavior flexible responses environment at different stages cycle. driven by circannual rhythm, allowing for, resetting, carry-over effects. With experience, decisions migrants may be based information learnt breeding sites, wintering en route. At population level, substantial variation route choice timing explained interactions with environmental social factors, learning. this review we explore endogenous discuss what ways they can lead flexibility behavior.

Language: Английский

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Migratory strategy drives species-level variation in bird sensitivity to vegetation green-up

Nature Ecology & Evolution, Journal Year: 2021, Volume and Issue: 5(7), P. 987 - 994

Published: April 29, 2021

Language: Английский

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Demographic consequences of phenological asynchrony for North American songbirds

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(28)

Published: July 3, 2023

Changes in phenology response to ongoing climate change have been observed numerous taxa around the world. Differing rates of phenological shifts across trophic levels led concerns that ecological interactions may become increasingly decoupled time, with potential negative consequences for populations. Despite widespread evidence and a broad body supporting theory, large-scale multitaxa demographic asynchrony remains elusive. Using data from continental-scale bird-banding program, we assess impact dynamics on avian breeding productivity 41 species migratory resident North American birds forested areas. We find strong optimum where decreases years both particularly early or late when occurs relative local vegetation phenology. Moreover, demonstrate landbird did not keep pace timing green-up over recent 18-y period, even though has tracked greater sensitivity than arrival species. Species whose more closely tend migrate shorter distances (or are entire year) breed earlier season. These results showcase broadest-scale yet impacts change. Future change-associated will likely result decrease most species, given bird is failing

Language: Английский

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Liquid-culture protocols for synchronous starvation, growth, dauer formation, and dietary restriction of Caenorhabditis elegans

STAR Protocols, Journal Year: 2021, Volume and Issue: 2(1), P. 100276 - 100276

Published: Jan. 14, 2021

Standard laboratory culture of Caenorhabditis elegans utilizes solid growth media with a bacterial food source. However, this method limits control availability and worm population density, factors that impact many life-history traits. Here, we describe liquid-culture protocols for precisely modulating facilitating reliable production arrested L1 larvae, dauer dietarily restricted worms, or well-fed worms. Worms can be grown in small quantities standard assays the millions other applications. For complete details on use execution these protocols, please refer to Hibshman et al. (2016), Webster (2018), Jordan (2019).

Language: Английский

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Six decades of North American bird banding records reveal plasticity in migration phenology

Journal of Animal Ecology, Journal Year: 2023, Volume and Issue: 92(3), P. 738 - 750

Published: Jan. 19, 2023

The timing of avian migration has evolved to exploit critical seasonal resources, yet plasticity within phenological responses may allow adjustments interannual resource phenology. diversity migratory species and changes in underlying resources response climate change make it challenging generalize these relationships. We use bird banding records during spring fall from across North America examine macroscale fluctuations temperature long-term annual trends In total, we 19 American wood warblers (family Parulidae), summarizing 2,826,588 banded birds 1961 2018 46 sites 124 fall. During spring, warmer temperatures at locations translated earlier median passage dates for 16 species, with an average 0.65-day advancement every 1°C increase temperature, ranging 0.25 1.26 days °C-1 . the fall, relationships were considerably weaker, only 3 showing a relationship temperature. those three cases, later departure associated periods. Projecting forward under scenarios change, forecast continued advancements shared socioeconomic pathways 2041 2060 2081 2100 more muted variable shifts These results demonstrate capacity long-distance migrants respond temperatures, least showcase potential data understanding wide species.

Language: Английский

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Avian migration clocks in a changing world

Journal of Comparative Physiology A, Journal Year: 2024, Volume and Issue: 210(4), P. 691 - 716

Published: Feb. 2, 2024

Abstract Avian long-distance migration requires refined programming to orchestrate the birds’ movements on annual temporal and continental spatial scales. Programming is particularly important as typically anticipate future environmental conditions. Hence, has long been of particular interest in chronobiology. Captivity studies using a proxy, shift nocturnality during seasons (i.e., migratory restlessness), have revealed circannual circadian regulation, well an innate sense direction. Thanks rapid development tracking technology, detailed information from free-flying birds, including annual-cycle data actograms, now allows relating this mechanistic background behaviour wild. Likewise, genomic approaches begin unravel many physiological pathways that contribute migration. Despite these advances, it still unclear how programmes are integrated with specific conditions experienced journey. Such knowledge imminently environments undergo anthropogenic modification. Migratory birds group not dealing changes, yet some species show remarkable adjustments at behavioural genetic levels. Integrated research interdisciplinary collaborations needed understand range responses change, more broadly, functioning timing under natural

Language: Английский

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Mapping seasonal migration in a songbird hybrid zone -- heritability, genetic correlations, and genomic patterns linked to speciation

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(18)

Published: April 22, 2024

Seasonal migration is a widespread behavior relevant for adaptation and speciation, yet knowledge of its genetic basis limited. We leveraged advances in tracking sequencing technologies to bridge this gap well-characterized hybrid zone between songbirds that differ migratory behavior. Migration requires the coordinated action many traits, including orientation, timing, wing morphology. used mapping show these traits are highly heritable genetically correlated, explaining how has evolved so rapidly past suggesting future responses climate change may be possible. Many mapped same genomic regions small structural variants indicating same, or tightly linked, genes underlie them. Analyses integrating transcriptomic data indicate cholinergic receptors could control multiple traits. Furthermore, analyses differentiation further suggested underlying help maintain reproductive isolation zone.

Language: Английский

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Buffering and phenological mismatch: A change of perspective

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(5)

Published: May 1, 2024

Abstract The potential for climate change to disrupt phenology‐mediated interactions in interaction networks has attracted considerable attention recent decades. Frequently, studies emphasize the fragility of ephemeral seasonal interactions, and risks posed by phenological asynchrony. Here, we argue that fitness consequences asynchrony may often be more buffered than is typically acknowledged. We identify three main forms buffering take: (i) mechanisms reduce between consumer resource; (ii) costs being asynchronous; (iii) dampen interannual variance performance across higher organizational units. Using synchrony hatching winter moth caterpillars leafing their host‐plants as a case study, wide variety buffers detrimental on caterpillar individuals, populations, meta‐populations. follow this drawing examples breadth taxa, demonstrate these quite general. conclude identifying key gaps our knowledge demographic buffering, context mismatch. Buffering substantially alter understanding biotic impacts future change—a greater recognition contribution reveal many trophic are surprisingly resilient, also serve shift research emphasis those systems with fewer towards limits buffers.

Language: Английский

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Photic Barriers to Poleward Range-shifts

Trends in Ecology & Evolution, Journal Year: 2020, Volume and Issue: 35(8), P. 652 - 655

Published: May 27, 2020

Language: Английский

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Human activity shapes the wintering ecology of a migratory bird

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(12), P. 2715 - 2727

Published: April 13, 2021

Abstract Human behavior profoundly affects the natural world. Migratory birds are particularly susceptible to adverse effects of human activities because global networks ecosystems on which rely undergoing rapid change. In spite these challenges, blackcap ( Sylvia atricapilla ) is a thriving migratory species. Its recent establishment high‐latitude wintering areas in Britain and Ireland has been linked climate change backyard bird feeding, exemplifying interaction between activity migrant ecology. To understand how anthropogenic influences shape avian movements ecology, we marked 623 blackcaps at 59 sites across compiled dataset 9929 encounters. We investigated visitation garden feeding sites, inter‐annual site fidelity, within seasons. analyzed migration tracks from 25 geolocators fitted subset individuals may impact subsequent breeding. found that showed high fidelity low transience among contrast itinerant characteristic their traditional winter range. First‐winter lower greater likelihood than adults. Adults frequented gardens had better body condition, smaller fat stores, longer bills, rounder wingtips. However, did not exclusively feed gardens; visits were harsher weather. Individuals generally stayed until immediately before spring departure. Our results suggest supplementary modifying ecology driving morphological evolution. Supplemental have multifaceted benefits survival, positive carry over Overall, individual variability movement foraging flexibility it imparts, allowed this species flourish during environmental

Language: Английский

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