Genotypic variation in foundation species generates network structure that may drive community dynamics and evolution

• DOI: 10.1890/15-0600.1
• Publication Date: 2015-10-07T20:59:32Z
• Authors: Matthew K. Lau; Arthur R. Keith; Stuart R. Borrett; Stephen M. Shuster; Thomas G. Whitham
• Keywords: Modularity; Null model; Variation (astronomy); Community; Ecological network

Abstract Although genetics in a single species is known to impact whole communities, little about how genetic variation influences interaction networks complex ecosystems. Here, we examine the interactions community of arthropod on replicated genotypes (clones) foundation tree species, Populus angustifolia James (narrowleaf cottonwood), long‐term, common garden experiment using bipartite “genotype–species” network perspective. We combine this empirical work with simulation designed further investigate among individual can structure. Three findings emerged: (1) “genotype–species network” exhibited significant structure modularity being greater than highly conservative null model; (2) as would be expected given modular structure, displayed positive co‐occurrence patterns; and (3) furthermore, simulations particular clearly increasing, genotypic increased. These results support conclusion that contributes ecological networks, which could influence dynamics (e.g., assembly stability) evolution context.