Data from: Determinants of parasitoid communities of willow-galling sawflies: habitat overrides physiology, host plant, and space ...

• Main Authors: Nyman, Tommi, Leppänen, Sanna A., Várkonyi, Gergely, Shaw, Mark R., Koivisto, Reijo, Barstad, Trond Elling, Vikberg, Veli, Roininen, Heikki
• Format: Dataset
• Language: English
• Published: Dryad 2015
• Subjects: enemy-free space; Bracon; Adelognathus; Ichneutes; tritrophic food webs; Tenthredinidae; Salicaceae; Pteromalus; Salix; Eurytoma; Eulonchetron; Chalcidoidea; community barcoding; Scambus; Shawiana; Ichneumonidae; Braconidae; Holocene; Pontania; vertical diversification effects; Arctic; Fennoscandia; Subarctic
• Online Access: https://dx.doi.org/10.5061/dryad.km75s; https://datadryad.org/stash/dataset/doi:10.5061/dryad.km75s

Studies on the determinants of plant–herbivore and herbivore–parasitoid associations provide important insights into the origin and maintenance of global and local species richness. If parasitoids are specialists on herbivore niches rather than on herbivore taxa, then alternating escape of herbivores into novel niches and delayed resource tracking by parasitoids could fuel diversification at both trophic levels. We used DNA barcoding to identify parasitoids that attack larvae of seven Pontania sawfly species that induce leaf galls on eight willow species growing in subarctic and arctic–alpine habitats in three geographic locations in northern Fennoscandia, and then applied distance- and model-based multivariate analyses and phylogenetic regression methods to evaluate the hierarchical importance of location, phylogeny and different galler niche dimensions on parasitoid host use. We found statistically significant variation in parasitoid communities across geographic locations and willow host species, but the ... : Barcode sequences of reared parasitoid reference specimensCOI barcode sequences of 72 reared adult parasitoid reference specimens that were used to identify larval parasitoids based on their barcodes.Barcode_sequences_of_reared_parasitoid_reference_specimens.nexBarcode sequences of parasitoid larvaeCOI barcode sequences of 561 parasitoid larvae collected from galls induced by Pontania sawfliesBarcode_sequences_of_parasitoid_larvae.nexParasitoid numbers in Pontania population-level samplesNumbers of parasitoid larvae (identified by COI barcodes) representing each of 14 parasitoid species in 22 Pontania leaf-galler community samples.Parasitoid_numbers_raw_data.xlsxCommands and data for GLM analyses in mvabundCombined text file containing commands and data used for the model-based analyses of the effects of host (galler and willow species) and location on parasitism using the mvabund package in R.Commands_and_data_for_GLM_analyses_in_mvabund.txtCommands and data for test of phylogenetic effectsCombined text ...