10.5061/DRYAD.KG17GQ6
Zhang, Ziliang
Clemson University
Chengdu Institute of Biology
Chinese Academy of Sciences
University of Chinese Academy of Sciences
Phillips, Richard P.
Indiana University Bloomington
Zhao, Wenqiang
Chengdu Institute of Biology
Yuan, Yuanshuang
Chengdu Institute of Biology
Chinese Academy of Sciences
University of Chinese Academy of Sciences
Liu, Qing
Chengdu Institute of Biology
Yin, Huajun
Chengdu Institute of Biology
Data from: Mycelia-derived C contributes more to nitrogen cycling than
root-derived C in ectomycorrhizal alpine forests
Dryad
dataset
2019
extramatrical mycelia
belowground carbon inputs
Fine roots
ectomycorrhizal fungi
2019-11-08T00:00:00Z
2019-11-08T00:00:00Z
en
https://doi.org/10.1111/1365-2435.13236
28125 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
1. Plant roots and their associated microbial symbionts impact carbon (C)
and nutrient cycling in ecosystems, but estimates of the relative
contributions of root- versus microbe-derived dynamic inputs are highly
uncertain. Roots release C into soil via exudation and turnover (i.e.,
root-derived C), but also by allocating C to mycorrhizal fungal mycelia,
which exude C and undergo turnover (i.e., mycelia-derived C). Given that
the relative contributions of root- and mycelia-derived C inputs are
unknown, a key knowledge gap lies in understanding not only the relative
contributions of root- versus mycelia-derived C inputs, but also the
consequences of these fluxes on nutrient cycling. 2. Using ingrowth cores
and stable isotope analyses, we quantified root- and mycelia-derived C
inputs into the soil and their relative contributions to nitrogen (N)
cycling in two ectomycorrhizal alpine forests, a 70-year-old spruce
plantation and a 200-year-old spruce-fir dominated forest, in western
Sichuan, China. 3. Across the two forests, extramatrical mycelia of
ectomycorrhizal fungi accounted for up to two-thirds of the new root C
inputs into soil and ~80% of the stimulated N mineralization. Moreover,
flux-specific (per gram) mycelia-derived C inputs stimulated multiple
indices of soil N cycling to a greater degree than the flux-specific
root-derived C inputs, accounting for ~70% of the stimulated N
mineralization in both forests. 4. Collectively, our findings indicate
that the effects of mycorrhizal fungi on soil C and N cycling may exceed
those of roots in alpine coniferous forests dominated by ectomycorrhizal
fungi, highlighting the need to incorporate mycorrhizal fungal inputs into
biogeochemical models for ecosystems.
Properties of soil and plant tissues in the ingrowth coresThis data file
contains the raw isotope data related to new C inputs and the soil and
plant properties related to soil N cycling observed in the in-growth core
treatments.Soil microbial phospholipids acid (PLFA) biomarkers
contentsThis file contains the raw data of main (classified) soil
microbial phospholipids acid biomarkers contents in the in-growth core
treatments.
China