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Community context modifies response of host-parasitoid interactions to phenological mismatch under warming
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  • Nicholas Pardikes,
  • Tomas Revilla,
  • Chia-Hua Lue,
  • Melanie Thierry,
  • Daniel Souto-Villaros,
  • Jan Hrcek
Nicholas Pardikes
Biologicke Centrum Akademie ved Ceske republiky
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Tomas Revilla
Biology Centre Czech Academy of Sciences
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Chia-Hua Lue
Biology Centre Czech Academy of Sciences
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Melanie Thierry
Biology Centre Czech Academy of Sciences
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Daniel Souto-Villaros
Charles University Faculty of Science
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Jan Hrcek
Biology Centre Czech Academy of Sciences
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Abstract

Climate change is altering the relative timing of species interactions by shifting when species appear in a community and by accelerating developmental rates. However, phenological shifts may be mediated through community contexts, such as intraspecific competition and alternative resource species, which can prolong the otherwise shortened windows of availability. Using a combination of laboratory experiments and dynamic simulations, we quantified how the effects of phenological shifts in Drosophila-parasitoid interactions differed with concurrent changes in temperature, intraspecific competition, and the presence of alternative host species. We found that community context, particularly the presence of alternative host species, supported interaction persistence across a wider range of phenological shifts than pairwise interactions. Parasitism rates declined under warming, which limited the ability of community contexts to manage mismatched interactions. These results demonstrate that ongoing declines in insect diversity may exacerbate the effects of phenological shifts in ecological communities under future global warming temperatures.

Peer review status:UNDER REVIEW

17 Jun 2021Submitted to Ecology Letters
18 Jun 2021Assigned to Editor
18 Jun 2021Submission Checks Completed
24 Jun 2021Reviewer(s) Assigned
16 Jul 2021Review(s) Completed, Editorial Evaluation Pending