Title: Coexisting orchid species have distinct mycorrhizal communities and display strong spatial segregation
Authors: Jacquemyn, Hans ×
Brys, Rein
Merckx, Vincent
Waud, Michael
Lievens, Bart
Wiegand, Thorsten #
Issue Date: Apr-2014
Publisher: Wiley-Blackwell Publishing Ltd.
Series Title: New Phytologist vol:202 issue:2 pages:616-627
Abstract: Because orchids are dependent on mycorrhizal fungi for germination and establishment of seedlings, differences in the mycorrhizal communities associating with orchids can be expected to mediate the abundance, spatial distribution and coexistence of terrestrial orchids in natural communities. We assessed the small-scale spatial distribution of seven orchid species co-occurring in 25 × 25 m plots in two Mediterranean grasslands. In order to characterize the mycorrhizal community associating with each orchid species, 454 pyrosequencing was used. The extent of spatial clustering was assessed using techniques of spatial point pattern analysis. The community of mycorrhizal fungi consisted mainly of members of the Tulasnellaceae, Thelephoraceae and Ceratobasidiaceae, although sporadically members of the Sebacinaceae, Russulaceae and Cortinariaceae were observed. Pronounced differences in mycorrhizal communities were observed between species, whereas strong clustering and significant segregation characterized the spatial distribution of orchid species. However, spatial segregation was not significantly related to phylogenetic dissimilarity of fungal communities. Our results indicate that co-occurring orchid species have distinctive mycorrhizal communities and show strong spatial segregation, suggesting that mycorrhizal fungi are important factors driving niche partitioning in terrestrial orchids and may therefore contribute to orchid coexistence.
ISSN: 0028-646X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Bioengineering Technology TC, Technology Campus De Nayer Sint-Katelijne-Waver
Ecology, Evolution and Biodiversity Conservation Section
Technologiecluster Bioengineering Technologie
× corresponding author
# (joint) last author

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