Accounting for environmental variation in co‐occurrence modelling reveals the importance of positive interactions in root‐associated fungal communities

Understanding the role of interspecific interactions in shaping ecological communities is one of the central goals in community ecology. In fungal communities, measuring interspecific interactions directly is challenging because these communities are composed of large numbers of species, many of whi...

Full description

Bibliographic Details
Main Authors: Abrego, Nerea, Roslin, Tomas, Huotari, Tea, Tack, Ayco J.M., Lindahl, Björn D., Tikhonov, Gleb, Somervuo, Panu, Schmidt, Niels Martin, Ovaskainen, Otso, Tack, Ayco J. M.
Format: Dataset
Language:unknown
Published: 2020
Subjects:
Online Access:https://zenodo.org/record/4069550
https://doi.org/10.5061/dryad.9kd51c5dp
Description
Summary:Understanding the role of interspecific interactions in shaping ecological communities is one of the central goals in community ecology. In fungal communities, measuring interspecific interactions directly is challenging because these communities are composed of large numbers of species, many of which are unculturable. An indirect way of assessing the role of interspecific interactions in determining community structure is to identify the species co-occurrences that are not constrained by the environmental conditions. In this study, we investigated co-occurrences among root-associated fungi, asking whether fungi co-occur more or less strongly than expected based on the environmental conditions and the host plant species examined. For this purpose, we generated molecular data on root-associated fungi of five plant species evenly sampled along an elevational gradient at a high Arctic site. We analysed the data using a joint species distribution modelling approach that allowed us to identify those co-occurrences that could be explained by the environmental conditions and the host plant species, as well as those co-occurrences that remained unexplained and thus more likely reflect interactive associations. Our results indicate that positive interactions play an important role in shaping microbial communities in arctic plant roots. In particular, we found that mycorrhizal fungi are especially prone to positively co-occur with other fungal species. Our results bring new understanding to the structure of arctic interaction networks by suggesting that interactions among root-associated fungi are predominantly positive. The data are given in the format of R-files which can be used as shown in the uploaded R-scripts. You may need to add ".rdata" file extension to the Funding provided by: Academy of FinlandCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100002341Award Number: 308651Funding provided by: Ella and Georg Ehrnrooth Foundation*Crossref Funder Registry ID: Award Number: Funding provided by: Academy ...