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Title
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Warming affects soil metabolome : the case study of Icelandic grasslands
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Author
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Abstract
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| The effect of warming is stronger in arctic and sub-arctic latitudes than in temperate and tropical zones. We studied soil metabolomes along two soil-warming gradients (0 to +15 degrees C). One temperature gradient has been present for at least 50 years and possibly even centuries (long-term treatment), while the second gradient was created after a shallow crustal earthquake in 2008 (short-term treatment). Soil metabolomes at the two sites responded differently to warming. At the short-term warmed site, warming of +3 degrees C already shifted soil metabolomic profiles relative to the controls, whereas at the long-term warmed site the soil metabolome only shifted at temperatures +5 degrees C. Saccharides and amino acids, primary metabolites involved in protective mechanisms against heat, were the main compounds accumulated at the highest soil warming levels. Some secondary metabolites associated with a broad spectrum of stressors, like phenolic acids and terpenes, were also up-regulated. Across the IPCC scenario's, most climate models predict a substantial rise in mean annual temperature of up to 8 degrees C in the Arctic region by the end of the 21st century. Our results suggest that temperature increases of >+5 degrees C would permanently alter soil metabolomic profile, whereas smaller temperature increases of (<+3 C) would affect soil metabolome profile transiently, not permanently. |
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Language
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English
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Source (journal)
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European journal of soil biology. - Paris
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Publication
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Paris
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2021
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ISSN
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1164-5563
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DOI
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10.1016/J.EJSOBI.2021.103317
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Volume/pages
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105
(2021)
, 8 p.
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Article Reference
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103317
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ISI
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000674539100009
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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