Non‐reproductive dispersal: an important driver of migratory range dynamics and connectivity DOI Creative Commons
Stephen H. Vickers, Aldina M. A. Franco, James J. Gilroy

et al.

Ecography, Journal Year: 2023, Volume and Issue: 2023(5)

Published: March 5, 2023

Dispersal is the primary ecological process underpinning spatial dynamics in motile species by generating flux reproductive locations over time. In migratory species, dispersal can also occur around non‐breeding ranges, but this form currently lacks a unifying theoretical framework. We present novel conceptual model for migrants that builds upon existing literature, differentiating ‘reproductive' (i.e. changes breeding locations) from ‘non‐reproductive' dispersal, which we define as movements resulting inter‐annual or inter‐generational locations. Crucially, unlike where movement outcomes are naturally propagated between generations, of non‐reproductive be non‐heritable. use simulations solo‐migrant population with genetically encoded programme to illustrate how variation heritability exerts strong influence on both connectivity and range shift propensity. When exposed spatially uncoupled shifts habitable ranges seasonal climate niches shifting at different rates), long‐term persistence simulated populations required programmes arise through heritable forms (e.g. mutations gene complexes). By contrast, non‐heritable mechanisms navigation errors) cannot drive despite being major component realised patterns. Migratory metrics conflate these drivers therefore have limited power predicting responses environmental change. Our models provide framework improving our understanding populations, highlight importance teasing apart variability order evaluate predict plasticity migrants.

Language: Английский

How migratory birds might have tracked past climate change DOI Creative Commons
Benjamin M. Van Doren

Proceedings of the National Academy of Sciences, Journal Year: 2022, Volume and Issue: 119(3)

Published: Jan. 10, 2022

Organisms’ responses to past climatic extremes provide a useful perspective for understanding the impacts of ongoing and increasingly rapid climate change. Volant organisms can disperse long distances, allowing them find colonize new habitats during periods However, ability move distances does not necessarily imply increased responsiveness or resiliency For example, long-distance migratory songbirds rely on innate genetic programs that may lack evolutionary flexibility, making it more challenging track environmental change (1). The birds historical extremes, such as those Last Glacial Period, important context current challenges facing natural world. In PNAS, Thorup et al. (2) show bird species could have maintained behavior through last 120,000 y, lifestyle might been key adapting shifts without suffering population declines. During Maximum (21,000 y before present), ice covered large extents present-day breeding ranges breed in Northern Hemisphere boreal summer, including red-backed shrike ( Lanius collurio ). Red-backed shrikes are open with scattered woody vegetation hunt insects other small animals, often impaling their prey twigs, thorns, wire. Today, across western Eurasia leave winter; tracked individuals from grounds Scandinavia nonbreeding southern Africa. At Maximum, areas that, today, host suitable habitat would inhospitable shrikes, almost entirely absent its European range. Forced south … [↵][1]1Email: vandoren{at}cornell.edu. [1]: #xref-corresp-1-1

Language: Английский

Citations

14
Assessment of Suitable Habitat of the Demoiselle Crane (Anthropoides virgo) in the Wake of Climate Change: A Study of Its Wintering Refugees in Pakistan DOI Creative Commons
Tauheed Ullah Khan, Inam Ullah, Yiming Hu

et al.

Animals, Journal Year: 2024, Volume and Issue: 14(10), P. 1453 - 1453

Published: May 13, 2024

The inevitable impacts of climate change have reverberated across ecosystems and caused substantial global biodiversity loss. Climate-induced habitat loss has contributed to range shifts at both species community levels. Given the importance identifying suitable habitats for at-risk species, it is imperative assess potential current future distributions, understand influential environmental factors. Like many Demoiselle crane not immune climatic pressures. Khyber Pakhtunkhwa Balochistan provinces in Pakistan are known wintering grounds this species. that among top five countries facing devastating effects change, study sought conduct distribution modeling under using data collected during 4 years field surveys. We developed a Maximum Entropy model predict projected area. Future projections 2050 2070 were carried out two representative concentration pathways (RCP 4.5 RCP 8.5) three circulation models, including HADGEM2-AO, BCC-CSM1-1, CCSM4. most factors shaping Crane suitability included temperature seasonality, annual mean temperature, terrain ruggedness index, human population density, all which significantly (81.3%). identified 35% area as moderately (134,068 km

Language: Английский

Citations

2
Migration strategies of a high-latitude breeding songbird (Setophaga coronata coronata) revealed using multi-sensor geolocators and stable isotopes DOI Creative Commons
Stephanie J. Szarmach, Johanna K Beam,

M. N. Moore

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 11, 2024

ABSTRACT Seasonal migration allows animals to use habitat where conditions are unfavorable for part of the year but may constrain breeding ranges due costs longer migrations as expand poleward. In species with large ranges, high latitude populations employ different migratory strategies allowing them persist far from other core non-breeding areas. The myrtle warbler ( Setophaga coronata ) has two disjunct in North and Central America–one along Gulf Coast on Pacific. Previous work indirectly linked birds Alaska Pacific area, suggesting that evolved a shorter route. We directly tested this hypothesis using geolocators measuring both light atmospheric pressure track Alaskan fine detail inferred areas hydrogen isotopes larger sample Alaska, British Columbia, Alberta. found, contrary expectations, all geolocator-tracked most stable isotope data migrated southeastern United States, while only small subset (∼5%) likely wintered Coast. additionally demonstrate advantages geolocation characterizing behavior at scale.

Language: Английский

Citations

2
Bird migration: When vagrants become pioneers DOI Creative Commons
Alexander Charles Lees, James J. Gilroy

Current Biology, Journal Year: 2021, Volume and Issue: 31(24), P. R1568 - R1570

Published: Dec. 1, 2021

Language: Английский

Citations

12
Non‐reproductive dispersal: an important driver of migratory range dynamics and connectivity DOI Creative Commons
Stephen H. Vickers, Aldina M. A. Franco, James J. Gilroy

et al.

Ecography, Journal Year: 2023, Volume and Issue: 2023(5)

Published: March 5, 2023

Dispersal is the primary ecological process underpinning spatial dynamics in motile species by generating flux reproductive locations over time. In migratory species, dispersal can also occur around non‐breeding ranges, but this form currently lacks a unifying theoretical framework. We present novel conceptual model for migrants that builds upon existing literature, differentiating ‘reproductive' (i.e. changes breeding locations) from ‘non‐reproductive' dispersal, which we define as movements resulting inter‐annual or inter‐generational locations. Crucially, unlike where movement outcomes are naturally propagated between generations, of non‐reproductive be non‐heritable. use simulations solo‐migrant population with genetically encoded programme to illustrate how variation heritability exerts strong influence on both connectivity and range shift propensity. When exposed spatially uncoupled shifts habitable ranges seasonal climate niches shifting at different rates), long‐term persistence simulated populations required programmes arise through heritable forms (e.g. mutations gene complexes). By contrast, non‐heritable mechanisms navigation errors) cannot drive despite being major component realised patterns. Migratory metrics conflate these drivers therefore have limited power predicting responses environmental change. Our models provide framework improving our understanding populations, highlight importance teasing apart variability order evaluate predict plasticity migrants.

Language: Английский

Citations

4