Interspecific synchrony on breeding performance and the role of anthropogenic food subsidies

Ana Payo-Payo* (Corresponding Author), José-Manuel Igual, Ana Sanz-Aguilar, Enric Real, Meritxell Genovart, Daniel Oro, Giacomo Tavecchia

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Synchrony can have important consequences for long-term metapopulations persistence, community dynamics and ecosystems functioning. While the causes and consequences of intra-specific synchrony on population size and demographic rates have received considerable attention only a few factors that may affect inter-specific synchrony have been described. We formulate the hypothesis that food subsidies can buffer the influence of environmental stochasticity on community dynamics, disrupting and masking originally synchronized systems. To illustrate this hypothesis, we assessed the consequences of European policies implementation affecting subsidy availability on the temporal synchrony of egg volume as a proxy of breeding investment in two sympatric marine top predators with differential subsidy use. We show how 7-year synchrony appears on egg volume fluctuations after subsidy cessation suggesting that food subsidies could disrupt interspecific synchrony. Moreover, cross correlation increased after subsidy cessation and environmental buffering seems to act during synchronization period. We emphasize that subsidies dynamics and waste management provide novel insights on the emergence of synchrony in natural populations.

Original languageEnglish
Article numbere0275569
Number of pages10
JournalPloS ONE
Issue number10
Early online date12 Oct 2022
Publication statusPublished - 12 Oct 2022


  • Ecosystem
  • Population Density
  • Population Dynamics


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