These authors contributed equally to this work.
Article first published online: 23 JAN 2012
© 2012 The Authors. New Phytologist © 2012 New Phytologist Trust
Volume 194, Issue 2, pages 536–547, April 2012
How to Cite
Montesinos-Navarro, A., Segarra-Moragues, J. G., Valiente-Banuet, A. and Verdú, M. (2012), The network structure of plant–arbuscular mycorrhizal fungi. New Phytologist, 194: 536–547. doi: 10.1111/j.1469-8137.2011.04045.x
- Issue published online: 19 MAR 2012
- Article first published online: 23 JAN 2012
- Received: 1 October 2011, Accepted: 7 December 2011
- community assemblages;
- plant–arbuscular mycorrhizal fungi (AMF) association
- •Ecological network theory predicts that in mutualistic systems specialists tend to interact with a subset of species with which generalists interact (i.e. nestedness). Approaching plant–arbuscular mycorrhizal fungi (AMF) association using network analyses will allow the generality of this pattern to be expanded to the ubiquitous plant–AMF mutualism.
- •Based on certain plant–AMF specificity recently suggested, networks are expected to be nested as a result of their mutualistic nature, and modular, with certain species interacting more tightly than others. Network analyses were used to test for nestedness and modularity and to compare the different contribution of plant and AMF to the overall nestedness.
- •Plant–AMF networks share general network properties with other mutualisms. Plant species with few AMFs in their roots tend to associate with those AMFs recorded in most plant species. AMFs present in a few plant species occur in plant species sheltering most AMF (i.e. nestedness). This plant–AMF network presents weakly interlinked subsets of species, strongly connected internally (i.e. modularity). Both plants and AMF show a nested structure, although AMFs have lower nestedness than plants.
- •The plant–AMF interaction pattern is interpreted in the context of how plant–AMF associations can be underlying mechanisms shaping plant community assemblages.