Article Dans Une Revue Ecology Letters Année : 2025

Continent‐Wide Drivers of Spatial Synchrony in Breeding Demographic Structure Across Wild Great Tit Populations

Joe Woodman
Stefan Vriend
Alexander Artemyev
  • Fonction : Auteur
Malcolm Burgess
Ella Cole
  • Fonction : Auteur
Tapio Eeva
Simon Evans
Agu Leivits
András Liker
Seppo Rytkönen
Juan Carlos Senar
Gábor Seress
Marta Szulkin
Kees van Oers
Emma Vatka
Marcel Visser
Josh Firth
Ben Sheldon

Résumé

Variation in age structure influences population dynamics, yet we have limited understanding of the spatial scale at which its fluctuations are synchronised between populations. Using 32 great tit populations, spanning 4° W–33° E and 35°–65° N involving > 130,000 birds across 67 years, we quantify spatial synchrony in breeding demographic structure (subadult vs. adult breeders) and its drivers. We show that larger clutch sizes, colder winters, and larger beech crops lead to younger populations. We report distance‐dependent synchrony of demographic structure, maintained at approximately 650 km. Despite covariation with demographic structure, we do not find evidence for environmental variables influencing the scale of synchrony, except for beech masting. We suggest that local ecological and density‐dependent dynamics impact how environmental variation interacts with demographic structure, influencing estimates of the environment's effect on synchrony. Our analyses demonstrate the operation of synchrony in demographic structure over large scales, with implications for age‐dependent demography in populations.

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Dates et versions

hal-04973799 , version 1 (03-11-2025)

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Joe Woodman, Stefan Vriend, Frank Adriaensen, Elena Álvarez, Alexander Artemyev, et al.. Continent‐Wide Drivers of Spatial Synchrony in Breeding Demographic Structure Across Wild Great Tit Populations. Ecology Letters, 2025, 28 (2), pp.e70079. ⟨10.1111/ele.70079⟩. ⟨hal-04973799⟩
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