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Title: Nitrogen deposition and prey nitrogen uptake control the nutrition of the carnivorous plant Drosera rotundifolia
Authors: Millett, Jonathan
Foot, G.W.
Svensson, B.M.
Keywords: Atmospheric nitrogen deposition
Carnivorous plants
Drosera rotundifolia
Plant-insect interactions
Round-leaved sundew
Stable isotopes
Issue Date: 2015
Publisher: © Elsevier B.V
Citation: MILLETT, J., FOOT, G.W. and SVENSSON, B.M., 2015. Nitrogen deposition and prey nitrogen uptake control the nutrition of the carnivorous plant Drosera rotundifolia. Science of the Total Environment, 512-513, pp. 631 - 636.
Abstract: Nitrogen (N) deposition has important negative impacts on natural and semi-natural ecosystems, impacting on biotic interactions across trophic levels. Low-nutrient systems are particularly sensitive to changes in N inputs and are therefore more vulnerable to N deposition. Carnivorous plants are often part of these ecosystems partly because of the additional nutrients obtained from prey. We studied the impact of N deposition on the nutrition of the carnivorous plant Drosera rotundifolia growing on 16 ombrotrophic bogs across Europe. We measured tissue N, phosphorus (P) and potassium (K) concentrations and prey and root N uptake using a natural abundance stable isotope approach. Our aim was to test the impact of N deposition on D. rotundifolia prey and root N uptake, and nutrient stoichiometry. D. rotundifolia root N uptake was strongly affected by N deposition, possibly resulting in reduced N limitation. The contribution of prey N to the N contained in D. rotundifolia ranged from 20 to 60%. N deposition reduced the maximum amount of N derived from prey, but this varied below this maximum. D. rotundifolia tissue N concentrations were a product of both root N availability and prey N uptake. Increased prey N uptake was correlated with increased tissue P concentrations indicating uptake of P from prey. N deposition therefore reduced the strength of a carnivorous plant–prey interaction, resulting in a reduction in nutrient transfer between trophic levels. We suggest that N deposition has a negative impact on D. rotundifolia and that responses to N deposition might be strongly site specific.
Description: This article was accepted for publication in the journal, Science of the Total Environment [© Elsevier B.V] and the definitive version is available at: http://dx.doi.org/10.1016/j.scitotenv.2015.01.067
Sponsor: JM received funding from the British Ecological Society (BES) and the Botanical Research Fund, GF received funding from the UK Engineering and Physical Sciences Research Council in the formof a summer undergraduate research bursary and from the BES, and BMS from the Department of Ecology and Genetics, Uppsala University. We acknowledge the EOBS data set from the EU-FP6 project ENSEMBLES (http://ensembleseu. metoffice.com) and the data providers in the ECA&D project (http://www.ecad.eu).
Version: Accepted for publication
DOI: 10.1016/j.scitotenv.2015.01.067
URI: https://dspace.lboro.ac.uk/2134/17472
Publisher Link: http://dx.doi.org/10.1016/j.scitotenv.2015.01.067
ISSN: 0048-9697
Appears in Collections:Published Articles (Geography and Environment)

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