Tree diversity effects on soil microbial biomass and respiration are context dependent across forest diversity experiments - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Global Ecology and Biogeography Year : 2022

Tree diversity effects on soil microbial biomass and respiration are context dependent across forest diversity experiments

Dylan Craven
Andy Hector
  • Function : Author
Hervé Jactel
Christian Messier
Andrew Smith
  • Function : Author
Kris Verheyen

Abstract

Aim Soil microorganisms are essential for the functioning of terrestrial ecosystems. Although soil microbial communities and functions are linked to tree species composition and diversity, there has been no comprehensive study of the generality or context dependence of these relationships. Here, we examine tree diversity-soil microbial biomass and respiration relationships across environmental gradients using a global network of tree diversity experiments. Location Boreal, temperate, subtropical and tropical forests. Time period 2013. Major taxa studied Soil microorganisms. Methods Soil samples collected from 11 tree diversity experiments were used to measure microbial respiration, biomass and respiratory quotient using the substrate-induced respiration method. All samples were measured using the same analytical device, method and procedure to reduce measurement bias. We used linear mixed-effects models and principal components analysis (PCA) to examine the effects of tree diversity (taxonomic and phylogenetic), environmental conditions and interactions on soil microbial properties. Results Abiotic drivers, mainly soil water content, but also soil carbon and soil pH, significantly increased soil microbial biomass and respiration. High soil water content reduced the importance of other abiotic drivers. Tree diversity had no effect on the soil microbial properties, but interactions with phylogenetic diversity indicated that the effects of diversity were context dependent and stronger in drier soils. Similar results were found for soil carbon and soil pH. Main conclusions Our results indicate the importance of abiotic variables, especially soil water content, for maintaining high levels of soil microbial functions and modulating the effects of other environmental drivers. Planting tree species with diverse water-use strategies and structurally complex canopies and high leaf area might be crucial for maintaining high soil microbial biomass and respiration. Given that greater phylogenetic distance alleviated unfavourable soil water conditions, reforestation efforts that account for traits improving soil water content or select more phylogenetically distant species might assist in increasing soil microbial functions.
Fichier principal
Vignette du fichier
2022-Cesarz-GEB.pdf (1.26 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-03595191 , version 1 (03-03-2022)

Licence

Attribution

Identifiers

Cite

Simone Cesarz, Dylan Craven, Harald Auge, Helge Bruelheide, Bastien Castagneyrol, et al.. Tree diversity effects on soil microbial biomass and respiration are context dependent across forest diversity experiments. Global Ecology and Biogeography, 2022, ⟨10.1111/geb.13461⟩. ⟨hal-03595191⟩
48 View
38 Download

Altmetric

Share

Gmail Facebook X LinkedIn More