econullnetr provides a set of functions for running null models, analysing and plotting the results, and exporting the outputs for use with other network packages in R.
Vaughan, I.P., Gotelli, N.J., Memmott, J., Pearson, C.E., Woodward, G. & Symondson, W.O.C. (2018) econullnetr: an R package using null models to analyse the structure of ecological networks and identify resource selection. Methods in Ecology and Evolution, 9, 728--733.