Intraspecies variation in a widely distributed tree species regulates the responses of soil microbiome to different temperature regimes

TitleIntraspecies variation in a widely distributed tree species regulates the responses of soil microbiome to different temperature regimes
Publication TypeJournal Article
Year of Publication2018
AuthorsZhang CJ, Delgado-Baquerizo M, Drake JE, Reich PB, Tjoelker MG, Tissue DT, Wang JT, He JZ, Singh BK
JournalEnvironmental Microbiology Reports
Volume10
Pagination167-178
Date PublishedApr
Type of ArticleArticle
ISBN Number1758-2229
Accession NumberWOS:000428391900006
Keywordsbacterial communities, boreal forest, Community structure, decomposition, diversity, elevated co2, Environmental Sciences & Ecology, Fungi, grassland soil, litter, Microbiology, plant domestication, rhizosphere
Abstract

Plant characteristics in different provenances within a single species may vary in response to climate change, which might alter soil microbial communities and ecosystem functions. We conducted a glasshouse experiment and grew seedlings of three provenances (temperate, subtropical and tropical origins) of a tree species (i.e., Eucalyptus tereticornis) at different growth temperatures (18, 21.5, 25, 28.5, 32 and 35.5 degrees C) for 54 days. At the end of the experiment, bacterial and fungal community composition, diversity and abundance were characterized. Measured soil functions included surrogates of microbial respiration, enzyme activities and nutrient cycling. Using Permutation multivariate analysis of variance (PerMANOVA) and network analysis, we found that the identity of tree provenances regulated both structure and function of soil microbiomes. In some cases, tree provenances substantially affected the response of microbial communities to the temperature treatments. For example, we found significant interactions of temperature and tree provenance on bacterial community and relative abundances of Chloroflexi and Zygomycota, and inorganic nitrogen. Microbial abundance was altered in response to increasing temperature, but was not affected by tree provenances. Our study provides novel evidence that even a small variation in biotic components (i.e., intraspecies tree variation) can significantly influence the response of soil microbial community composition and specific soil functions to global warming.

Alternate JournalEnviron. Microbiol. Rep.