Understanding the ecological and evolutionary function of stopover in migrating birds

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2022, Volume and Issue: 97(4), P. 1231 - 1252

Published: Feb. 8, 2022

ABSTRACT Global movement patterns of migratory birds illustrate their fascinating physical and physiological abilities to cross continents oceans. During voyages, most land multiple times make so‐called ‘stopovers’. Our current knowledge on the functions stopover is mainly based proximate study departure decisions. However, such studies are insufficient gauge fully ecological evolutionary stopover. If we how a focal trait, e.g. changes in energy stores, affects decision depart from without considering trait(s) that actually caused bird land, unfavourable environmental conditions for flight, misinterpret function It thus important realise acknowledge stopovers have many different functions, not every migrant has same (set of) reasons stop‐over. Additionally, may obtain contradictory results because significance traits context dependent. For instance, late spring migrants be more prone risk‐taking with lower stores than early migrants. Thus, neglect decisions subject selection minimise immediate (mortality risk) and/or delayed (low future reproductive output) fitness costs. To alleviate these issues, first define as an interruption endurance flight costs . Second, review all probable stopover, which include accumulating energy, various forms recovery avoiding adverse list potential other less well studied, minimising predation, exhaustion spatiotemporal adjustments migration. Third, derived aspects, argue paradigm shift ecology research. This includes focusing why individual interrupts its likely identify individual‐specific function(s) correctly departure‐decision studies. Moreover, highlight selective forces acting dependent expected differ between, K −/ r ‐selected species, sexes migration strategies. example, else being equal, species survival rate, high rate) should stronger urge continue or resume increase suffered offset by higher success subsequent breeding season. Finally, propose focus mechanisms controlling landing decisions, ultimate shaping ideas limited but can applied any species. revised definition proposed stimulate fruitful discussion towards better understanding Furthermore, identifying will support targeted measures conserve restore functionality sites threatened anthropogenic changes. especially long‐distance migrants, currently alarming decline.

Language: Английский

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Avian Use of Agricultural Areas as Migration Stopover Sites: A Review of Crop Management Practices and Ecological Correlates

Frontiers in Ecology and Evolution, Journal Year: 2021, Volume and Issue: 9

Published: May 14, 2021

An estimated 17% of migratory bird species are threatened or near with extinction. This represents an enormous potential loss biodiversity and cost to human societies due the economic benefits that birds provide through ecosystem services ecotourism. Conservation presents many unique challenges, as these rely on multiple geographically distinct habitats, including breeding grounds, non-breeding stopover sites during migration. In particular, habitats seldom studied relative despite their importance refueling stations for birds. this study, we summarize current research use temporary primary crops by migration assess characteristics agricultural practices most often associated cropland habitat. First, conducted a systematic review literature document effects various farming crop types have abundance diversity using areas stopovers. Second, analyzed ecological correlates in Northern Hemisphere predict which may while migrating. We ran GLMM test whether diet, diet breadth, habitat, habitat realm predicted areas. Our suggests particular (principally rice, corn, sunflower), well result higher non-cultivated plant diversity, encourage migrating found is used can utilize large breadth preferences similar structure

Language: Английский

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Atmospheric pressure predicts probability of departure for migratory songbirds

Movement Ecology, Journal Year: 2023, Volume and Issue: 11(1)

Published: April 30, 2023

Abstract Background Weather can have both delayed and immediate impacts on animal populations, species evolved behavioral adaptions to respond weather conditions. has long been hypothesized affect the timing intensity of avian migration, radar studies demonstrated strong correlations between broad-scale migration patterns. How affects individual decisions about initiation migratory flights, particularly at beginning remains uncertain. Methods Here, we combine automated radio telemetry data from four songbirds collected five breeding wintering sites in North America with hourly a global model. We use these determine how wind profit, atmospheric pressure, precipitation, cloud cover probability departure sites. Results found that was related changes almost completely regardless species, season, or location. Individuals were more likely depart nights when pressure had rising over past 24 h, which is predictive fair next several days. By contrast, each only informative predictors single species. Conclusions Our results suggest birds actively information inform decision-making regarding grounds. propose choose date hierarchical fashion not influencing until after window already narrowed down by other ultimate proximate factors.

Language: Английский

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Migrating mule deer compensate en route for phenological mismatches

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: April 10, 2023

Billions of animals migrate to track seasonal pulses in resources. Optimally timing migration is a key strategy, yet the ability compensate for phenological mismatches en route largely unknown. Using GPS movement data collected from 72 adult female deer over 10-year duration, we study population mule (Odocoileus hemionus) Wyoming that lack reliable cues on their desert winter range, causing them start 70 days ahead 52 behind wave spring green-up. We show individual arrive at summer range within an average 6-day window by adjusting speed and stopover use. Late migrants move 2.5 times faster spend 72% less time stopovers than early migrants, which allows catch green wave. Our findings suggest ungulates, potentially other migratory species, possess cognitive abilities recognize where they are space relative Such behavioral capacity may allow taxa maintain foraging benefits amid rapidly changing phenology.

Language: Английский

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More than mortality: Consequences of human activity on migrating birds extend beyond direct mortality

Ornithological Applications, Journal Year: 2023, Volume and Issue: 125(3)

Published: May 29, 2023

Abstract Birds must contend with an array of anthropogenic threats during their migratory journeys. Many migrants are killed due to encounters artificial light, introduced species, pollutants, and other hazards, while survivors these can suffer longer-lasting negative effects. The nonlethal effects on migrating birds less well understood than direct mortality, yet both potentially contribute population declines. For example, building collisions frequently kill birds, but the numbers that survive impaired ability fly, refuel, or navigate destination time is not understood. Though immediately fatal, such injuries lead delayed mortality and, ultimately, reduced lifetime reproductive success. Furthermore, likely encounter multiple journeys, which interact synergistically further reduce fitness. instance, light pollution attracts disorients migrants, increasing likelihood window strikes, surviving may be more vulnerable predation from predators. While considerable attention has focused lethal threats, here, we review eight types migration, interactions, pathways through they exert fitness costs. In doing so, identify knowledge gaps suggest areas for future research. absence information, propose greatest reduction in cumulative impacts hazards will achieved by addressing threat types, like at night, compound impact additional threats. Direct sources recognized as a key driver declines, full understanding human activity include interacting extend beyond immediate en route influence overall migration success

Language: Английский

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Seasonal patterns and processes of migration in a long-distance migratory bird: energy or time minimization?

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2024, Volume and Issue: 291(2024)

Published: June 1, 2024

Optimal migration theory prescribes adaptive strategies of energy, time or mortality minimization. To test alternative hypotheses energy- and time-minimization we used multisensory data loggers that record time-resolved flight activity light for positioning by geolocation in a long-distance migratory shorebird, the little ringed plover,

Language: Английский

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Conservation‐focused mapping of avian migratory routes using a pan‐European automated telemetry network

Conservation Biology, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

Accelerated biodiversity loss has destabilized functional links within and between ecosystems. Species that cross different ecosystems during migration breeding nonbreeding sites are particularly sensitive to global change because they exposed various, often ecosystem-specific, threats. Because these threats have lethal nonlethal effects on populations, many migratory species declining, making this group especially vulnerable change. To mitigate their decline, research at a continental flyway scale is required adequately monitor changes in the demographic processes of populations all parts annual cycle. The Motus Wildlife Tracking System (Motus) could provide solution data gaps exist for small, species. an automated telemetry system animal tracking uses single very-high-frequency radio signal track tagged individuals. can information movements made by individuals small migrant species, thereby aiding understanding aspects affect parameters. Conservation-focused opportunities related include identification critical stopover support connect multiple insight into decisions birds environmental stressors, such as artificial light night. Examples studies from existing network demonstrate its utility high-conservation-value area blackpoll warbler (Setophaga striata) eastern United States. Geographical across Mediterranean region Europe need be filled continent-wide movements. individual-level variety small-bodied taxa, drive expand will improve ability direct conservation plans

Language: Английский

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Modeling Wetland Resources for Spring Migratory Waterbirds Under Different Agricultural Management Scenarios in the Iowa Portion of the Prairie Pothole Region, USA

Wetlands, Journal Year: 2025, Volume and Issue: 45(5)

Published: April 29, 2025

Language: Английский

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Social learning and culture in birds: emerging patterns and relevance to conservation

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 380(1925)

Published: May 1, 2025

There is now abundant evidence for a role of social learning and culture in shaping behaviour range avian species across multiple contexts, from migration routes geese foraging crows, to passerine song. Recent emerging has further linked fitness outcomes some birds, highlighting its potential importance conservation. Here, we first summarize the state knowledge on focusing best-studied contexts migration, foraging, predation We identify extensive gaps taxa but argue that existing suggests that: (i) are taxonomically clustered (ii) reliance one behavioural domain does not predict others. Together, use this build predictive framework aid conservationists species-specific decision-making under imperfect knowledge. Second, review link between conservation birds. understanding which behaviours birds likely learn socially can help refine strategies, improving trajectories threatened populations. Last, present practical steps how consideration be integrated into actions including reintroductions, translocations captive breeding programmes.This article part theme issue 'Animal culture: changing world'.

Language: Английский

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Songbirds initiate migratory flights synchronously relative to civil dusk

Movement Ecology, Journal Year: 2023, Volume and Issue: 11(1)

Published: April 30, 2023

Each spring and fall billions of songbirds depart on nocturnal migrations across the globe. Theory suggests that should migration shortly after sunset to maximize their potential for nightly flight duration or time departure with emergence celestial cues needed orientation navigation. Although captive studies have found during a narrow window sunset, observational wild birds later more asynchronously relative than predicted.We used coded radio tags automated radio-telemetry estimate nearly 400 individuals from nine songbird species departed breeding wintering grounds North America. We also assessed whether each was most likely beginning long-distance migratory flights at instead first making non-migratory regional flights. then explored variation in by post-departure movement type, species, age, sex, season.We 90% were initiating within 69 min civil dusk, regardless season, sex. By contrast, made movements away destination throughout night. Regardless 98% dusk but otherwise showed no preference relation twilight phase.Although presence may set starting point night, fact earlier synchronously those is consistent hypothesis departing promptly functions distance. studying onset migration, our study provides baseline information about decisions enhance understanding timing migration.

Language: Английский

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