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Relationships between plant traits, soil properties and carbon fluxes differ between monocultures and mixed communities in temperate grassland

De Long, Jonathan R. and Jackson, Benjamin G. and Wilkinson, Anna and Pritchard, William J. and Oakley, Simon and Mason, Kelly E. and Stephan, Jörg and Ostle, Nicholas J. and Johnson, David and Baggs, Elizabeth M. and Bardgett, Richard D. (2019). Relationships between plant traits, soil properties and carbon fluxes differ between monocultures and mixed communities in temperate grassland. Journal of Ecology. 107 , 1704-1719
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Abstract

The use of plant traits to predict ecosystem functions has been gaining growing attention. Above-ground plant traits, such as leaf nitrogen (N) content and specific leaf area (SLA), have been shown to strongly relate to ecosystem productivity, respiration and nutrient cycling. Furthermore, increasing plant functional trait diversity has been suggested as a possible mechanism to increase ecosystem carbon (C) storage. However, it is uncertain whether below-ground plant traits can be predicted by above-ground traits, and if both above- and below-ground traits can be used to predict soil properties and ecosystem-level functions. Here, we used two adjacent field experiments in temperate grassland to investigate if above- and below-ground plant traits are related, and whether relationships between plant traits, soil properties and ecosystem C fluxes (i.e. ecosystem respiration and net ecosystem exchange) measured in potted monocultures could be detected in mixed field communities. We found that certain shoot traits (e.g. shoot N and C, and leaf dry matter content) were related to root traits (e.g. root N, root C:N and root dry matter content) in monocultures, but such relationships were either weak or not detected in mixed communities. Some relationships between plant traits (i.e. shoot N, root N and/or shoot C:N) and soil properties (i.e. inorganic N availability and microbial community structure) were similar in monocultures and mixed communities, but they were more strongly linked to shoot traits in monocultures and root traits in mixed communities. Structural equation modelling showed that above- and below-ground traits and soil properties improved predictions of ecosystem C fluxes in monocultures, but not in mixed communities on the basis of community-weighted mean traits. Synthesis. Our results from a single grassland habitat detected relationships in monocultures between above- and below-ground plant traits, and between plant traits, soil properties and ecosystem C fluxes. However, these relationships were generally weaker or different in mixed communities. Our results demonstrate that while plant traits can be used to predict certain soil properties and ecosystem functions in monocultures, they are less effective for predicting how changes in plant species composition influence ecosystem functions in mixed communities.

Authors/Creators:De Long, Jonathan R. and Jackson, Benjamin G. and Wilkinson, Anna and Pritchard, William J. and Oakley, Simon and Mason, Kelly E. and Stephan, Jörg and Ostle, Nicholas J. and Johnson, David and Baggs, Elizabeth M. and Bardgett, Richard D.
Title:Relationships between plant traits, soil properties and carbon fluxes differ between monocultures and mixed communities in temperate grassland
Year of publishing :2019
Volume:107
Page range:1704-1719
Number of Pages:16
Publisher:John Wiley & Sons Ltd on behalf of British Ecological Society
ISSN:0022-0477
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:above-ground-below-ground linkages, biodiversity, carbon, ecosystem function, net ecosystem exchange, nitrogen, plant functional traits, soil microbial communities
URN:NBN:urn:nbn:se:slu:epsilon-p-98861
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-98861
Additional ID:
Type of IDID
DOI10.1111/1365-2745.13160
Web of Science (WoS)000473096200014
ID Code:16250
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:13 Aug 2019 05:47
Metadata Last Modified:13 Aug 2019 05:47

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