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Title: Data from: Species turnover (β diversity) in ectomycorrhizal fungi linked to NH4+ uptake capacity      
keywords:
Adaptation
Community Ecology
Fungi
Niche Modelling
type:
Article
description:
Ectomycorrhizal (EcM) fungal communities may be shaped by both deterministic and stochastic processes, potentially influencing ecosystem development and function. We evaluated community assembly processes for EcM fungi of Pseudotsuga menziesii among 12 sites up to 400 km apart in southwest British Columbia (Canada) by investigating species turnover (β diversity) in relation to soil nitrogen (N) availability and physical distance. We then examined functional traits for an N-related niche by quantifying net fluxes of NH4+, NO3- and protons on excised root tips from three contrasting sites using a microelectrode ion flux measurement system. EcM fungal communities were well aligned with soil N availability and pH, with no effect of site proximity (distance-decay curve) on species assemblages. Species turnover was significant (β1/2 = 1.48) along soil N gradients, with many more Tomentella species on high-N than low-N soils, in contrast to Cortinarius species. Ammonium uptake was greatest in the spring on the medium and rich sites, and averaged over 190 nmol m−2 s−1 for Tomentella species. The lowest uptake rates of NH4+ were by non-mycorrhizal roots of axenically grown seedlings (10 nmol m−2 s−1), followed by Cortinarius species (60 nmol m−2 s−1). EcM roots from all sites displayed only marginal uptake of nitrate (8.3 nmol m−2 s−1). These results suggest NH4+ uptake capacity is an important functional trait influencing the assembly of EcM fungal communities. The diversity of EcM fungal species across the region arguably provides critical belowground adaptations to organic and inorganic N supply that are integral to temperate rainforest ecology.
ID:
oai:datadryad.org:10255/dryad.98426
accesstypes:
download
landingPage: http://hdl.handle.net/10255/dryad.98426
authentication:
none
authorization:
none
ID:
doi:10.5061/dryad.mr861
Kranabetter JM, Hawkins BJ, Jones MD, Robbins S, Dyer T, Li T (2015) Species turnover (β diversity) in ectomycorrhizal fungi linked to NH4+ uptake capacity. Molecular Ecology 24(23): 5992–6005.
http://hdl.handle.net/10255/dryad.98426
MolEcol-MEC-15-0859.R1
setID:
hdl_10255_3
recNum:
29
setName:
Main
dateReleased:
02-29-2016
issueDate:
20151028
accessionDate:
10-28-2015
dateCreated:
10-28-2015
abbreviation:
Dryad
ID:
SCR:005910
name:
Dryad Digital Repository
homepage: http://www.datadryad.org
ID:
SCR:005910
name:
Dryad Data Repository

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