title: Strong linkage between plant and soil fungal communities along a successional coastal dune system.
abstract: Complex interactions between plants and soil microorganisms drive key ecosystem and community properties such as productivity and diversity. In nutrient-poor systems such as sand dunes, plant traits and fungal symbioses related to nutrient acquisition can strongly influence vegetation dynamics. We investigated plant and fungal communities in a relic foredune plain located on an archipelago in Québec, Canada. We detected distinct communities across the edaphic and successional gradient. Our results showed a clear increase in plant species richness, as well as in the diversity of nutrient-acquisition strategies. We also found a strong correlation between aboveground vegetation and soil fungal communities, and both responded similarly to soil physicochemical properties. Soil pH influenced the composition of plant and fungal communities, and could act as an important environmental filter along this relic foredune plain. The increasing functional diversity in plant nutrient-acquisition strategies across the gradient might favor resource partitioning and facilitation among co-occurring plant species. The coordinated changes in soil microbial and plant communities highlight the importance of aboveground-belowground linkages and positive biotic interactions during ecological succession in nutrient-poor environments.
authors.affiliation: Institut de recherche en biologie végétale, Département de sciences biologiques, Université de Montréal, 4101 Sherbrooke Est, Montréal, QC, H1X 2B2, Canada alice.roy-bolduc@umontreal.ca.
authors.forename: Alice
authors.initials: A
authors.lastname: Roy-Bolduc
authors.affiliation: Institut de recherche en biologie végétale, Département de sciences biologiques, Université de Montréal, 4101 Sherbrooke Est, Montréal, QC, H1X 2B2, Canada.
authors.forename: Etienne
authors.initials: E
authors.lastname: Laliberté
authors.affiliation: Département de biologie, Centre d'études nordiques, Université Laval, Pavillon Alexandre-Vachon, 1045 Av. de la Médecine, Québec, QC, G1V 0A6, Canada.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Boudreau
authors.affiliation: Institut de recherche en biologie végétale, Département de sciences biologiques, Université de Montréal, 4101 Sherbrooke Est, Montréal, QC, H1X 2B2, Canada.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Hijri
mesh_terms: D002170:Canada; D017753:Ecosystem; D004777:Environment; D005658:Fungi / Q000502:physiology*; D010944:Plants / Q000382:microbiology; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D013559:Symbiosis
chemical_list: D012987:Soil
keywords: 454-sequencing; coastal sand dunes; ecological succession; plant nutrient acquisition; plant–soil feedback; soil fungal community