Data from: Molecular analysis reveals high compartmentalisation in aphid-primary parasitoid networks and low parasitoid sharing between crop and non-crop habitats.
Derocles, Stephane A. P., University of Hull
Le Ralec, Anne, Agrocampus Ouest
Besson, Mathilde M., Agrocampus Ouest
Maret, Marion, Agrocampus Ouest
Walton, Alan, University of Hull
Evans, Darren M., University of Hull
Plantegenest, Manuel, Agrocampus Ouest
Published Feb 20, 2014 on Dryad.
Cite this dataset
Derocles, Stephane A. P. et al. (2014). Data from: Molecular analysis reveals high compartmentalisation in aphid-primary parasitoid networks and low parasitoid sharing between crop and non-crop habitats. [Dataset]. Dryad. https://doi.org/10.5061/dryad.v1q8j
The ecosystem service of insect pest regulation by natural enemies, such as primary parasitoids, may be enhanced by the presence of uncultivated, semi-natural habitats within agro-ecosystems, although quantifying such host–parasitoid interactions is difficult. Here, we use rRNA 16S gene sequencing to assess both the level of parasitism by Aphidiinae primary parasitoids and parasitoid identity on a large sample of aphids collected in cultivated and uncultivated agricultural habitats in Western France. We used these data to construct ecological networks to assess the level of compartmentalization between aphid and parasitoid food webs of cultivated and uncultivated habitats. We evaluated the extent to which uncultivated margins provided a resource for parasitoids shared between pest and nonpest aphids. We compared the observed quantitative ecological network described by our molecular approach to an empirical qualitative network based on aphid–parasitoid interactions from traditional rearing data found in the literature. We found that the molecular network was highly compartmentalized and that parasitoid sharing is relatively rare between aphids, especially between crop and noncrop compartments. Moreover, the few cases of putative shared generalist parasitoids were questionable and could be due to the lack of discrimination of cryptic species or from intraspecific host specialization. Our results suggest that apparent competition mediated by Aphidiinae parasitoids is probably rare in agricultural areas and that the contribution of field margins as a source of these biocontrol agents is much more limited than expected. Further large-scale (spatial and temporal) studies on other crops and noncrop habitats are needed to confirm this.
16S New species identified
This fasta file displays the 16S DNA sequences of new species identified in this study. This sequences are also deposited in Genbank
16S New species.fas
This is the raw dataset. This file contains the sampling data (date and location), the aphids analysed, the parasitism rate and the parasitoid detected with the molecular tool. This file was used to perform the statistical tests (with R) and to build figure 1.
This file contains all the aphid-parasitoid interactions identified with the molecular tool. This file was used to build the figure 2 with R.
This file contains all the aphid-parasitoid interaction record in Europe found in the literature. This file was used to build the figure 3 with R.