Most conservation efforts in seasonally dry tropical forests have overlooked less obvious targets for conservation, such as mycorrhizal fungi, that are critical to plant growth and ecosystem structure. We documented the diversity of ectomycorrhizal (EMF) and arbuscular mycorrhizal (AMF) fungal communities in Quercus oleoides (Fagaceae) in Guanacaste province, Costa Rica. Soil cores and sporocarps were collected from regenerating Q. oleoides plots differing in stand age (early vs late regeneration) during the wet season. Sequencing of the nuclear ribosomal ITS region in EMF root tips and sporocarps identified 37 taxa in the Basidiomycota; EMF Ascomycota were uncommon. The EMF community was dominated by one species (Thelephora sp. 1; 70% of soil cores), more than half of all EMF species were found only once in an individual soil core, and there were few conspecific taxa. Most EMF taxa were also restricted to either Early or Late plots. Levels of EMF species richness and diversity, and AMF root colonization were similar between plots. Our results highlight the need for comprehensive spatiotemporal samplings of EMF communities in Q. oleoides to identify and prioritize rare EMF for conservation, and document their genetic and functional diversity.
Chicago Botanic Garden, 1000 Lake Cook Rd, Glencoe, IL 60022, USA;Northwestern University, Graduate Program in Plant Biology and Conservation, Sheridan Rd, Evanston, IL 60208, USA;Chicago Botanic Garden, 1000 Lake Cook Rd, Glencoe, IL 60022, USA;Departments of Ecology, Evolution and Behavior and Plant Biology, University of Minnesota, 1479 Gortner Ave, 140 Gortner Lab, Saint Paul, MN 55108, USA;Chicago Botanic Garden, 1000 Lake Cook Rd, Glencoe, IL 60022, USA;Northwestern University, Graduate Program in Plant Biology and Conservation, Sheridan Rd, Evanston, IL 60208, USA;Chicago Botanic Garden, 1000 Lake Cook Rd, Glencoe, IL 60022, USA;Northwestern University, Graduate Program in Plant Biology and Conservation, Sheridan Rd, Evanston, IL 60208, USA
Recommended Citation:
Nikhilesh S Desai,Andrew W Wilson,Jennifer S Powers,et al. Ectomycorrhizal diversity and community structure in stands of Quercus oleoides in the seasonally dry tropical forests of Costa Rica[J]. Environmental Research Letters,2016-01-01,11(12)