Data from: Enhanced aphid abundance in spring desynchronizes predator–prey and plant–microorganism interactions
Fuchs, Benjamin, University of Würzburg
Breuer, Tatjana, University of Würzburg
Findling, Simone, University of Würzburg
Krischke, Markus, University of Würzburg
Müller, Martin J.
Holzschuh, Andrea, University of Würzburg
Krauss, Jochen, University of Würzburg
Mueller, Martin J., University of Würzburg
Published Nov 14, 2017 on Dryad.
Cite this dataset
Fuchs, Benjamin et al. (2017). Data from: Enhanced aphid abundance in spring desynchronizes predator–prey and plant–microorganism interactions [Dataset]. Dryad. https://doi.org/10.5061/dryad.9qt80
Climate change leads to phenology shifts of many species. However, not all species shift in parallel, which can desynchronize interspecific interactions. Within trophic cascades, herbivores can be top–down controlled by predators or bottom–up controlled by host plant quality and host symbionts, such as plant-associated micro-organisms. Synchronization of trophic levels is required to prevent insect herbivore (pest) outbreaks. In a common garden experiment, we simulated an earlier arrival time (~2 weeks) of the aphid Rhopalosiphum padi on its host grass Lolium perenne by enhancing the aphid abundance during the colonization period. L. perenne was either uninfected or infected with the endophytic fungus Epichloë festucae var. lolii. The plant symbiotic fungus produces insect deterring alkaloids within the host grass. Throughout the season, we tested the effects of enhanced aphid abundance in spring on aphid predators (top–down) and grass–endophyte (bottom–up) responses. Higher aphid population sizes earlier in the season lead to overall higher aphid abundances, as predator occurrence was independent of aphid abundances on the pots. Nonetheless, after predator occurrence, aphids were controlled within 2 weeks on all pots. Possible bottom–up control of aphids by increased endophyte concentrations occurred time delayed after high herbivore abundances. Endophyte-derived alkaloid concentrations were not significantly affected by enhanced aphid abundance but increased throughout the season. We conclude that phenology shifts in an herbivorous species can desynchronize predator–prey and plant–microorganism interactions and might enhance the probability of pest outbreaks with climate change.
Data Oecologia Fuchs et al
Aphid numbers and aphid predator numbers per week and pot. qPCR data from quantifying fungal DNA weekly. UPLC-MS data for endophyte derived alkaloids in the grass per week.