DECOMPOSITION OF SUB-ARCTIC PLANTS WITH DIFFERING NITROGEN ECONOMIES: A FUNCTIONAL ROLE FOR HEMIPARASITES
2003; Wiley; Volume: 84; Issue: 12 Linguagem: Inglês
10.1890/02-0426
ISSN1939-9170
AutoresHelen M. Quested, J. Hans C. Cornelissen, Malcolm C. Press, Terry V. Callaghan, Rien Aerts, Frank Trosien, Petra Riemann, Dylan Gwynn‐Jones, Alexandra Kondratchuk, Sven Jonasson,
Tópico(s)Agronomic Practices and Intercropping Systems
ResumoEcologyVolume 84, Issue 12 p. 3209-3221 Regular Article DECOMPOSITION OF SUB-ARCTIC PLANTS WITH DIFFERING NITROGEN ECONOMIES: A FUNCTIONAL ROLE FOR HEMIPARASITES Helen M. Quested, Helen M. Quested Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, United Kingdom Sheffield Centre for Arctic Ecology, University of Sheffield, 26, Taptonville Road, Sheffield S10 5BR, United Kingdom Climate Impacts Research Center, Abisko Naturvetenskapliga Station, SE 981 07, Abisko, Sweden Present address: Department of Botany, Stockholm University, S 106 91, Stockholm, Sweden. E-mail: [email protected]Search for more papers by this authorJ. Hans C. Cornelissen, J. Hans C. Cornelissen Institute of Ecological Science, Department of Systems Ecology, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The NetherlandsSearch for more papers by this authorMalcolm C. Press, Malcolm C. Press Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, United KingdomSearch for more papers by this authorTerry V. Callaghan, Terry V. Callaghan Sheffield Centre for Arctic Ecology, University of Sheffield, 26, Taptonville Road, Sheffield S10 5BR, United Kingdom Abisko Naturvetenskapliga Station, SE 981 07, Abisko, SwedenSearch for more papers by this authorRien Aerts, Rien Aerts Institute of Ecological Science, Department of Systems Ecology, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The NetherlandsSearch for more papers by this authorFrank Trosien, Frank Trosien Sheffield Centre for Arctic Ecology, University of Sheffield, 26, Taptonville Road, Sheffield S10 5BR, United KingdomSearch for more papers by this authorPetra Riemann, Petra Riemann Sheffield Centre for Arctic Ecology, University of Sheffield, 26, Taptonville Road, Sheffield S10 5BR, United KingdomSearch for more papers by this authorDylan Gwynn-Jones, Dylan Gwynn-Jones Institute of Biological Sciences, University of Wales, Aberystwyth, Ceredigion SY23 3DD WalesSearch for more papers by this authorAlexandra Kondratchuk, Alexandra Kondratchuk Department of Plant Physiology, Urals State University, Ekaterinburg 620083 RussiaSearch for more papers by this authorSven E. Jonasson, Sven E. Jonasson Physiological Ecology Research Group, Botanical Institute, Copenhagen University, Øster Farimagsgade 2D, DK-1353, Copenhagen K, DenmarkSearch for more papers by this author Helen M. Quested, Helen M. Quested Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, United Kingdom Sheffield Centre for Arctic Ecology, University of Sheffield, 26, Taptonville Road, Sheffield S10 5BR, United Kingdom Climate Impacts Research Center, Abisko Naturvetenskapliga Station, SE 981 07, Abisko, Sweden Present address: Department of Botany, Stockholm University, S 106 91, Stockholm, Sweden. E-mail: [email protected]Search for more papers by this authorJ. Hans C. Cornelissen, J. Hans C. Cornelissen Institute of Ecological Science, Department of Systems Ecology, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The NetherlandsSearch for more papers by this authorMalcolm C. Press, Malcolm C. Press Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, United KingdomSearch for more papers by this authorTerry V. Callaghan, Terry V. Callaghan Sheffield Centre for Arctic Ecology, University of Sheffield, 26, Taptonville Road, Sheffield S10 5BR, United Kingdom Abisko Naturvetenskapliga Station, SE 981 07, Abisko, SwedenSearch for more papers by this authorRien Aerts, Rien Aerts Institute of Ecological Science, Department of Systems Ecology, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The NetherlandsSearch for more papers by this authorFrank Trosien, Frank Trosien Sheffield Centre for Arctic Ecology, University of Sheffield, 26, Taptonville Road, Sheffield S10 5BR, United KingdomSearch for more papers by this authorPetra Riemann, Petra Riemann Sheffield Centre for Arctic Ecology, University of Sheffield, 26, Taptonville Road, Sheffield S10 5BR, United KingdomSearch for more papers by this authorDylan Gwynn-Jones, Dylan Gwynn-Jones Institute of Biological Sciences, University of Wales, Aberystwyth, Ceredigion SY23 3DD WalesSearch for more papers by this authorAlexandra Kondratchuk, Alexandra Kondratchuk Department of Plant Physiology, Urals State University, Ekaterinburg 620083 RussiaSearch for more papers by this authorSven E. Jonasson, Sven E. Jonasson Physiological Ecology Research Group, Botanical Institute, Copenhagen University, Øster Farimagsgade 2D, DK-1353, Copenhagen K, DenmarkSearch for more papers by this author First published: 01 December 2003 https://doi.org/10.1890/02-0426Citations: 154 Corresponding Editor: J. P. Schimel Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat 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. 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