Show simple item record Quested, Helen M. Cornelissen, J. Hans C. Press, MalcolmC Callaghan, Terry V. Aerts, Rien Trosien, Frank Riemann, Petra Gwynn-Jones, Dylan Kondratchuk, Alexandra Jonasson, Sven E. 2009-11-04T12:00:22Z 2009-11-04T12:00:22Z 2003
dc.identifier.citation Quested , H M , Cornelissen , J H C , Press , M , Callaghan , T V , Aerts , R , Trosien , F , Riemann , P , Gwynn-Jones , D , Kondratchuk , A & Jonasson , S E 2003 , ' Decomposition of sub-arctic plants with differing nitrogen economies: A functional role for hemiparasites ' Journal of Ecology , vol 84 , no. 12 , pp. 3209-3221 . DOI: 10.1890/02-0426 en
dc.identifier.issn 1365-2745
dc.identifier.other PURE: 139092
dc.identifier.other PURE UUID: e00786f7-ebdc-44cf-ab6c-44059e876ce5
dc.identifier.other dspace: 2160/3424
dc.identifier.other DSpace_20121128.csv: row: 3190
dc.identifier.other Scopus: 10744223506
dc.description Quested, H.M., Cornelissen, J.H.C., Press, M.C., Callaghan, T.V., Aerts, R., Trosien, F., Riemann, P., Gwynn-Jones, D., Kondratchuk, A., Jonasson, S.E. (2003). Decomposition of sub-arctic plants with differing nitrogen economies: A functional role for hemiparasites.   Ecology, 84, (12), 3209-3221 Sponsorship: This work was funded by the UK Biology and Biotechnology Research Council (BBSRC), Nordic Council of Ministers' Nordic Arctic Research Program (NARP), and the Swedish Royal Academy of Sciences (KVA) en
dc.description.abstract Although hemiparasitic plants have a number of roles in shaping the structure and composition of plant communities, the impact of this group on ecosystem processes, such as decomposition and nutrient cycling, has been poorly studied. In order to better understand the potential role of hemiparasites in these processes, a comparison of leaf and litter tissue quality, nitrogen (N) resorption, and decomposability with those of a wide range of other plant groups (involving a total of 72 species and including other groups with access to alternative nutrient sources, such as nitrogen fixers and carnivorous plants) was undertaken in several sub-arctic habitats. The foliar N concentration of hemiparasites generally exceeded that of co-occurring species. Further, hemiparasites (and N fixers) exhibited lower N resorption efficiencies than their counterparts with no major alternative N source. As a consequence, annual and perennial hemiparasite litter contained, on average, 3.1% and 1.9% N, respectively, compared with 0.77–1.1% for groups without a major alternative N source. Hemiparasite litter lost significantly more mass during decomposition than many, but not all, co-occurring species. These results were combined with those of a litter trapping experiment to assess the potential impact of hemiparasites on nutrient cycling. The common sub-arctic hemiparasite Bartsia alpina was estimated to increase the total annual N input from litter to the soil by 42% within 5 cm of its stems, and by 53% across a site with a Bartsia alpina stem density of 43 stems/m2. Our results therefore provide clear evidence in favor of a novel mechanism by which hemiparasites (in parallel with N-fixing species) may influence ecosystems in which they occur. Through the production of nutrient rich, rapidly decomposing litter, they have the potential to greatly enhance the availability of nutrients within patches where they are abundant, with possible consequent effects on small-scale biodiversity. en
dc.format.extent 13 en
dc.language.iso eng
dc.relation.ispartof Journal of Ecology en
dc.rights en
dc.title Decomposition of sub-arctic plants with differing nitrogen economies: A functional role for hemiparasites en
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en

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