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Wilhelm, R.C.* ; Muñoz-Ucros, J.* ; Weikl, F. ; Pritsch, K. ; Goebel, M.* ; Buckley, D.H.* ; Bauerle, T.L.*

The effects of mixed-species root zones on the resistance of soil bacteria and fungi to long-term experimental and natural reductions in soil moisture.

Sci. Total Environ. 873:162266 (2023)
Postprint DOI PMC
Open Access Green
Mixed forest stands tend to be more resistant to drought than species-specific stands partially due to complementarity in root ecology and physiology. We asked whether complementary differences in the drought resistance of soil microbiomes might contribute to this phenomenon. We experimented on the effects of reduced soil moisture on bacterial and fungal community composition in species-specific (single species) and mixed-species root zones of Norway spruce and European beech forests in a 5-year-old throughfall-exclusion experiment and across seasonal (spring-summer-fall) and latitudinal moisture gradients. Bacteria were most responsive to changes in soil moisture, especially members of Rhizobiales, while fungi were largely unaffected, including ectomycorrhizal fungi (EMF). Community resistance was higher in spruce relative to beech root zones, corresponding with the proportions of drought-favored (more in spruce) and drought-sensitive bacterial taxa (more in beech). The spruce soil microbiome also exhibited greater resistance to seasonal changes between spring (wettest) and fall (driest). Mixed-species root zones contained a hybrid of beech- and spruce-associated microbiomes. Several bacterial populations exhibited either enhanced resistance or greater susceptibility to drought in mixed root zones. Overall, patterns in the relative abundances of soil bacteria closely tracked moisture in seasonal and latitudinal precipitation gradients and were more predictive of soil water content than other environmental variables. We conclude that complementary differences in the drought resistance of soil microbiomes can occur and the likeliest form of complementarity in mixed-root zones coincides with the enrichment of drought-tolerant bacteria associated with spruce and the sustenance of EMF by beech.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter And Root Complementarity ; Beech-spruce Forest ; Drought Resistance ; Forest Soil Microbiome ; Plant–soil Interactions ; Precipitation Gradient; Fagus-sylvatica L.; Spruce Picea-abies; Norway Spruce; European Beech; Community Composition; Microbial Communities; Temporal Variation; Summer Drought; Sigma(s) Rpos; Douglas-fir
Sprache englisch
Veröffentlichungsjahr 2023
HGF-Berichtsjahr 2023
ISSN (print) / ISBN 0048-9697
e-ISSN 1879-1026
Zeitschrift Science of the Total Environment, The
Quellenangaben Band: 873, Heft: , Seiten: , Artikelnummer: 162266 Supplement: ,
Verlag Elsevier
Verlagsort Radarweg 29, 1043 Nx Amsterdam, Netherlands
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Biochemical Plant Pathology (BIOP)
Research Unit Environmental Simulation (EUS)
POF Topic(s) 30202 - Environmental Health
Forschungsfeld(er) Environmental Sciences
PSP-Element(e) G-504900-001
G-504911-001
Förderungen U.S. Department of Energy, Of fi ce of Biological & Environmental Research Genomic Science Program
German Research Foundation
DOI 10.1016/j.scitotenv.2023.162266
WOS ID 000951456300001
Scopus ID 85149057105
PubMed ID 36822431
Erfassungsdatum 2023-03-01
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