Comparing two measures of phenological synchrony in a predator–prey interaction: simpler works better

  • Jip Ramakers (Creator)
  • Phillip Gienapp (Creator)
  • Marcel E. Visser (Creator)

Dataset

Description

1. Global climate change has sparked a vast research effort into the demographic and evolutionary consequences of mismatches between consumer and resource phenology. Many studies have used the difference in peak dates to quantify phenological synchrony (match in dates, MD), but this approach has been suggested to be inconclusive, since it does not incorporate the temporal overlap between the phenological distributions (match in overlap, MO).
2. We used 24 years of detailed data on the phenology of a predator–prey system, the great tit (Parus major) and the main food for its nestlings, caterpillars, to estimate MD and MO at the population and brood level. We compared the performance of both metrics on two key demographic parameters: offspring recruitment probability and selection on the timing of reproduction.
3. Although MD and MO correlated quadratically as expected, MD was a better predictor for both offspring recruitment and selection on timing than MO. We argue—and verify through simulations—that this is because quantifying MO has to be based on nontrivial, difficult-to-verify assumptions that likely render MO too inaccurate as a proxy for food availability in practice.
4. Our results have important implications for the allocation of research efforts in long-term population studies in highly seasonal environments.
Date made available7 Nov 2019

Research Output

Comparing two measures of phenological synchrony in a predator–prey interaction: Simpler works better

Ramakers, J. J. C., Gienapp, P. & Visser, M. E., Mar 2020, In : Journal of Animal Ecology. 89, 3, p. 745-756

Research output: Contribution to journalArticleAcademicpeer-review

Open Access
  • Cite this

    Ramakers, J. (Creator), Gienapp, P. (Creator), Visser, M. E. (Creator) (7 Nov 2019). Comparing two measures of phenological synchrony in a predator–prey interaction: simpler works better10.5061/dryad.q573n5tf1