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Journal article
Warming alters competition for organic and inorganic nitrogen between co-existing grassland plant species
Plant and soil, Vol.406(1-2), pp.117-129
2016
Abstract
Grass species may acquire different forms of nitrogen (N) to reduce competition for the same resources. Climate change influences the availability of soil N and is therefore likely to cause shifts in N forms acquired by plants, thereby affecting their competitive interactions.
We investigated the effects of warming on the uptake of different N forms and competitive interactions of Festuca ovina and Anthoxanthum odoratum in a pot experiment. The plants were grown either in monocultures or mixture, and at ambient or elevated temperature (+10 A degrees C), and supplied with C-13 and N-15 isotopes to test for treatment effects on the relative uptake of ammonium, alanine or tri-alanine.
Both grass species took up relatively more N supplied as ammonium than as alanine or tri-alanine when grown under ambient conditions in monoculture. In contrast, when grown in mixtures, F. ovina took up the three supplied N forms in equal amounts, whereas A. odoratum switched to tri-alanine as the main N form. Under warmed conditions, both species took up the N forms equally, irrespective of competition treatments.
We have shown that grass species grown in mixture and under ambient conditions reduce competition by acquiring different N forms. Warming increased the availability of inorganic N in the soil and therefore deregulated the need for differential uptake of N forms.
Details
- Title
- Warming alters competition for organic and inorganic nitrogen between co-existing grassland plant species
- Authors/Creators
- Thomas M. Kuster - University of ManchesterAnna Wilkinson - University of ManchesterPaul W. Hill - Bangor UniversityDavey L. Jones - Bangor UniversityRichard D. Bardgett - University of Manchester
- Publication Details
- Plant and soil, Vol.406(1-2), pp.117-129
- Publisher
- Springer Nature
- Number of pages
- 13
- Grant note
- CEH_L_069_05_2013 / National Environment Research Council NERC; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC) BB/I009000/2 / Biotechnology and Biological Sciences Research Council; UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC) 145973 / Swiss National Science Foundation SNSF; Swiss National Science Foundation (SNSF) BB/I009000/2 / BBSRC; UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC)
- Identifiers
- 991005560340807891
- Copyright
- © 2016 The Authors
- Murdoch Affiliation
- Centre for Sustainable Farming Systems
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.112 Soil Carbon Dynamics
- Web Of Science research areas
- Agronomy
- Plant Sciences
- Soil Science
- ESI research areas
- Agricultural Sciences