10.5061/DRYAD.95G1V
Kranabetter, J.M.
Ministry of Forests Lands and Natural Resource Operations
Berch, S.M.
British Columbia Ministry of Environment; Victoria BC Canada
MacKinnon, J.A.
Simon Fraser University
Ceska, O.
Consulting Mycologist; Victoria BC Canada
Dunn, D.E.
Natural Resources Canada
Ott, P.K.
Ministry of Forests Lands and Natural Resource Operations
Dunn, D. E.
Natural Resources Canada
MacKinnon, J. A.
Simon Fraser University
Kranabetter, J. M.
Ministry of Forests Lands and Natural Resource Operations
Ott, P. K.
Ministry of Forests Lands and Natural Resource Operations
Data from: Species-area curve and distance-decay relationship indicate
habitat thresholds of ectomycorrhizal fungi in an old-growth Pseudotsuga
menziesii landscape
Dryad
dataset
2019
gamma diversity
Retention forestry
ectomycorrhizal fungi
2019-01-08T00:00:00Z
2019-01-08T00:00:00Z
en
https://doi.org/10.1111/ddi.12720
144518 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Aim: Ectomycorrhizal fungi (EMF) are a diverse and essential biota of
forests that are vulnerable to species loss through reductions in
late-seral habitat. We examined how the spatial ecology of this biota,
particularly distance-decay and species-area relationships, could better
inform habitat thresholds for EMF conservation planning. Location:
Southeast Vancouver Island near Victoria, British Columbia, Canada.
Methods: Using a stratified sampling design, 11 plots (0.15 ha in size)
were established at 0.05 to 17.5 km apart across 2800 ha of mesic
old-growth Pseudotsuga menziesii var. menziesii and Tsuga heterophylla
forests. EMF communities were compiled through molecular analysis of root
tips and sporocarps. Results: The EMF community was comprised of many
Cortinarius, Piloderma, Russula and Tricholoma species typical of
mesotrophic habitat. A total of 238 EMF species were observed, of which 86
species were detected only once. The ratio of average species richness per
plot (84 taxa) to total richness was low at 0.35, and inherent
stochasticity of the EMF community was estimated to be 31% community
dissimilarity for species incidence. Distance decay of EMF communities was
nonlinear, with an estimated slope break at 2.6 km, followed by a largely
unchanging trend in β-diversity. Accumulated species-area curves were
fitted best by the cumulative Weibull sigmoid model, and the asymptote
(367 species) at approx. 50 ha was consistent with non-parametric
estimates of γ diversity (342-362 spp.). Main conclusions: Old-growth
forests host an impressive amount of EMF diversity, and many of the
Ramaria, Inocybe and Russula species are likely to be endemic to the
Pacific Northwest. Both niche- and neutral-based processes influenced EMF
community composition, resulting in a minimum threshold of 50 ha (1.8% of
the sample area) for capturing γ diversity. These spatial patterns will
help design and evaluate conservation efforts, such as retention forestry,
to sustain fully diverse EMF communities over managed landscapes.
soil chemistryForest floor and upper mineral soil (0-20 cm) chemistry
analysis for each old-growth plotdistance matrixInterplot distances
between old-growth plots used in Mantel testEM fungal datasetFull taxa
list for each old-growth plot, along with Species Hypothesis designation
and representative molecular sequence
Southeast Vancouver Island
Canada
British Columbia