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Isothermal microcalorimetry provides new insight into terrestrial carbon cycling

Herrmann, Anke and Coucheney, Elsa and Nunan, Naoise (2014). Isothermal microcalorimetry provides new insight into terrestrial carbon cycling. Environmental science & technology (online). 48:8, 4344-4352
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Official URL: http://dx.doi.org/10.1021/es403941h

Abstract

Energy is continuously transformed in environmental systems through the metabolic activities of living organisms, but little is known about the relationship between the two. In this study, we tested the hypothesis that microbial energetics are controlled by microbial community composition in terrestrial ecosystems. We determined the functional diversity profiles of the soil biota (i.e., multiple substrate-induced respiration and microbial energetics) in soils from an arable ecosystem with contrasting long-term management regimes (54 years). These two functional profiling methods were then related to the soils' microbial community composition. Using isothermal microcalorimetry, we show that direct measures of energetics provide a functional link between energy flows and the composition of below-ground microbial communities at a high taxonomic level (Mantel R = 0.4602, P = 0.006). In contrast, this link was not apparent when carbon dioxide (CO2) was used as an aggregate measure of microbial metabolism (Mantel R = 0.2291, P = 0.11). Our work advocates that the microbial energetics approach provides complementary information to soil respiration for investigating the involvement of microbial communities in below-ground carbon dynamics. Empirical data of our proposed microbial energetics approach can feed into carbon-climate based ecosystem feedback modeling with the suggested conceptual ecological model as a base.

Authors/Creators:Herrmann, Anke and Coucheney, Elsa and Nunan, Naoise
Title:Isothermal microcalorimetry provides new insight into terrestrial carbon cycling
Series/Journal:Environmental science & technology (online) (1520-5851)
Year of publishing :2014
Volume:48
Number:8
Page range:4344-4352
Number of Pages:9
Publisher:American Chemical Society
ISSN:1520-5851
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:P Natural resources > P33 Soil chemistry and physics
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Other Earth and Related Environmental Sciences
Agrovoc terms:calorimetry, cycling, microorganisms, fungi, carbon
Keywords:calorimetry, cycling, microorganisms, fungi, carbon
URN:NBN:urn:nbn:se:slu:epsilon-e-2890
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2890
Additional ID:
Type of IDID
Web of Science (WoS)000334658400014
ID Code:12136
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment

(NL, NJ) > Department of Chemistry and Biotechnology (140101-161231)
Deposited By: SLUpub Connector
Deposited On:02 Sep 2015 13:59
Metadata Last Modified:11 Sep 2017 06:46

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