Search

Your search keyword '"Iversen, C.M."' showing total 3 results
Start Over Author "Iversen, C.M." Language english
3 results on '"Iversen, C.M."'

2. Traditional plant functional groups explain variation in economic but not size-related traits across the tundra biome

Author

Thomas, H.J.D., Myers-Smith, I.H., Bjorkman, A.D., Elmendorf, S.C., Blok, D., Cornelissen, J.H.C., Forbes, B.C., Hollister, R.D., Normand, S., Prevéy, J.S., Rixen, C., Schaepman-Strub, G., Wilmking, M., Wipf, S., Cornwell, W., Kattge, J., Goetz, S.J., Guay, K.C., Alatalo, J.M., Anadon-Rosell, A., Angers-Blondin, S., Berner, L.T., Björk, R.G., Buchwal, A., Buras, A., Carbognani, M., Christie, K., Siegwart Collier, L., Cooper, E.J., Eskelinen, A., Frei, E.R., Grau, O., Grogan, P., Hallinger, M., Heijman, M.M.P.D., Hermanutz, L., Hudson, J.M.G., Hülber, K., Iturrate-Garcia, M., Iversen, C.M., Jaroszynska, F., Johnstone, J.F., Kaarlejärvi, E., Kulonen, A., Lamarque, L.J., Lévesque, E., Te Beest, M., de Vries, F.T., Ozinga, W.A., and van Bodegom, P.M.

Subjects
food and beverages, plant functional types, ESG Stafafdelingen Omgevingswetenschappen, plant functional groups, Forest Ecology and Forest Management, vegetation change, plant traits, ecosystem function, ESG Staff Departments Environmental Sciences, Vegetatie, Bos- en Landschapsecologie, Bosecologie en Bosbeheer, Vegetation, Forest and Landscape Ecology, tundra biome, community composition, cluster analysis
Abstract

Aim: Plant functional groups are widely used in community ecology and earth system modelling to describe trait variation within and across plant communities. However, this approach rests on the assumption that functional groups explain a large proportion of trait variation among species. We test whether four commonly used plant functional groups represent variation in six ecologically important plant traits. Location: Tundra biome. Time period: Data collected between 1964 and 2016. Major taxa studied: 295 tundra vascular plant species. Methods: We compiled a database of six plant traits (plant height, leaf area, specific leaf area, leaf dry matter content, leaf nitrogen, seed mass) for tundra species. We examined the variation in species-level trait expression explained by four traditional functional groups (evergreen shrubs, deciduous shrubs, graminoids, forbs), and whether variation explained was dependent upon the traits included in analysis. We further compared the explanatory power and species composition of functional groups to alternative classifications generated using post hoc clustering of species-level traits. Results: Traditional functional groups explained significant differences in trait expression, particularly amongst traits associated with resource economics, which were consistent across sites and at the biome scale. However, functional groups explained 19% of overall trait variation and poorly represented differences in traits associated with plant size. Post hoc classification of species did not correspond well with traditional functional groups, and explained twice as much variation in species-level trait expression. Main conclusions: Traditional functional groups only coarsely represent variation in well-measured traits within tundra plant communities, and better explain resource economic traits than size-related traits. We recommend caution when using functional group approaches to predict tundra ecosystem change, or ecosystem functions relating to plant size, such as albedo or carbon storage. We argue that alternative classifications or direct use of specific plant traits could provide new insight into ecological prediction and modelling.

Published
2019

3. Root traits explain plant species distributions along climatic gradients yet challenge the nature of ecological trade-offs

Author

Oscar J. Valverde-Barrantes, Jasper van Ruijven, M. Luke McCormack, Ülo Niinemets, Hendrik Poorter, Renata Ćušterevska, Jonathan Lenoir, Ina C. Meier, Marco Schmidt, Fons van der Plas, Peter B. Reich, Grégoire T. Freschet, Francesco Maria Sabatini, Joana Bergmann, Thomas W. Kuyper, Jens Kattge, Catherine Roumet, Marina Semchenko, Josep Peñuelas, Isabelle Aubin, Gregory Richard Guerin, Wim A. Ozinga, Chaeho Byun, Helge Bruelheide, Franziska Schrodt, Olivia R. Burge, Christopher J. Sweeney, Nathaly R. Guerrero-Ramírez, Daniel C. Laughlin, Larry M. York, Colleen M. Iversen, Robert B. Jackson, Estelle Forey, Eduardo Velázquez, Liesje Mommer, Jürgen Dengler, Tatiana Lysenko, Bruno Hérault, Dirk Nikolaus Karger, Patrick Meir, Alexandra Weigelt, Station d'écologie théorique et expérimentale (SETE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD), Département écologie et biodiversité des milieux forestiers, prairiaux et aquatiques (ECODIV), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), German Research Foundation, Biological and Environmental Research (US), University of Göttingen, Laughlin, Daniel C., Mommer, Liesje, Sabatini, Francesco Maria, Bruelheide, Helge, Kuyper, Thom W., McCormack, M. Luke, Bergmann, Joana, Freschet, Grégoire T., Guerrero-Ramírez, Nathaly R., Iversen, Colleen M., Kattge, Jens, Meier, Ina C., Poorter, Hendrik, Roumet, Catherine, Semchenko, Marina, Valverde-Barrantes, Oscar J., van der Plas, Fons, van Ruijven, Jasper, York, Larry M., Aubin, Isabelle, Burge, Olivia R., Byun, Chaeho, Ćušterevska, Renata, Dengler, Jürgen, Forey, Estelle, Guerin, Greg R., Hérault, Bruno, Jackson, Robert B., Karger, Dirk Nikolaus, Lenoir, Jonathan, Lysenko, Tatiana, Meir, Patrick, Niinemets, Ülo, Ozinga, Wim A., Peñuelas, Josep, Reich, Peter B., Schmidt, Marco, Schrodt, Franziska, Weigelt, Alexandra, University of Wyoming (UW), Wageningen University and Research [Wageningen] (WUR), German Centre for Integrative Biodiversity Research (iDiv), Martin-Luther-University Halle-Wittenberg, The Morton Arboretum, Leibniz-Zentrum für Agrarlandschaftsforschung = Leibniz Centre for Agricultural Landscape Research (ZALF), Station d'Ecologie Théorique et Expérimentale (SETE), Centre National de la Recherche Scientifique (CNRS)-Fédération de Recherche Agrobiosciences, Interactions et Biodiversité (FR AIB), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Georg-August-University = Georg-August-Universität Göttingen, Oak Ridge National Laboratory [Oak Ridge] (ORNL), UT-Battelle, LLC, Max Planck Institute for Biogeochemistry (MPI-BGC), Max-Planck-Gesellschaft, Universität Hamburg (UHH), IBG-2, Institute for Bio and Geosciences, Macquarie University, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), University of Manchester [Manchester], University of Tartu, Florida International University [Miami] (FIU), Leipzig University, Noble Research Institute, Great Lakes Forestry Centre, Sault Sainte Marie, Ontario, Manaaki Whenua – Landcare Research [Lincoln], Andong National University, Ss. Cyril and Methodius University in Skopje (UKIM), Zürich University of Applied Sciences (ZHAW), University of Bayreuth, University of Adelaide, University of Queensland [Brisbane], Forêts et Sociétés (UPR Forêts et Sociétés), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Institut National Polytechnique Félix Houphouët Boigny de Yamoussoukro (INP-HB), Stanford University, Stanford Woods Institute for the Environment, Institut Fédéral de Recherches sur la Forêt, la Neige et le Paysage (WSL), Institut Fédéral de Recherches [Suisse], Ecologie et Dynamique des Systèmes Anthropisés - UMR CNRS 7058 (EDYSAN), Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS), Russian Academy of Sciences [Moscow] (RAS), Australian National University (ANU), University of Edinburgh, Estonian University of Life Sciences (EMU), CREAF - Centre for Ecological Research and Applied Forestries, University of Minnesota System, Western Sydney University, Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Goethe-Universität Frankfurt am Main-Senckenberg – Leibniz Institution for Biodiversity and Earth System Research - Senckenberg Gesellschaft für Naturforschung, Leibniz Association-Leibniz Association, University of Nottingham, UK (UON), Universidad de Valladolid [Valladolid] (UVa), Laughlin D.C., Mommer L., Sabatini F.M., Bruelheide H., Kuyper T.W., McCormack M.L., Bergmann J., Freschet G.T., Guerrero-Ramirez N.R., Iversen C.M., Kattge J., Meier I.C., Poorter H., Roumet C., Semchenko M., Sweeney C.J., Valverde-Barrantes O.J., van der Plas F., van Ruijven J., York L.M., Aubin I., Burge O.R., Byun C., Custerevska R., Dengler J., Forey E., Guerin G.R., Herault B., Jackson R.B., Karger D.N., Lenoir J., Lysenko T., Meir P., Niinemets U., Ozinga W.A., Penuelas J., Reich P.B., Schmidt M., Schrodt F., Velazquez E., and Weigelt A.

Subjects
0106 biological sciences, Environmental change, Range (biology), Climate, Ecophysiology, Bos- en Landschapsecologie, Forests, 01 natural sciences, Système racinaire, Forest and Landscape Ecology, ComputingMilieux_MISCELLANEOUS, Ecology, Facteur du milieu, Soil Biology, PE&RC, Physiologie végétale, Phenotype, 580: Pflanzen (Botanik), Biogeography, [SDE]Environmental Sciences, Trait, Plantenecologie en Natuurbeheer, Vegetatie, Bos- en Landschapsecologie, Écologie, F40 - Écologie végétale, Facteur écologique, F60 - Physiologie et biochimie végétale, Biogéographie, Plant Ecology and Nature Conservation, Biology, 010603 evolutionary biology, ddc:570, Life Science, Forest, Community ecology, 577: Ökologie, Plant Dispersal, Vegetatie, Ecology, Evolution, Behavior and Systematics, Bodembiologie, Environmental gradient, Vegetation, Community, Directional selection, Water, 15. Life on land, Natural variation in plants, Vegetation, Forest and Landscape Ecology, 010606 plant biology & botany
Abstract

21 Pág. Instituto de Ciencias Forestales (ICIFOR), Ecological theory is built on trade-offs, where trait differences among species evolved as adaptations to different environments. Trade-offs are often assumed to be bidirectional, where opposite ends of a gradient in trait values confer advantages in different environments. However, unidirectional benefits could be widespread if extreme trait values confer advantages at one end of an environmental gradient, whereas a wide range of trait values are equally beneficial at the other end. Here, we show that root traits explain species occurrences along broad gradients of temperature and water availability, but model predictions only resembled trade-offs in two out of 24 models. Forest species with low specific root length and high root tissue density (RTD) were more likely to occur in warm climates but species with high specific root length and low RTD were more likely to occur in cold climates. Unidirectional benefits were more prevalent than trade-offs: for example, species with large-diameter roots and high RTD were more commonly associated with dry climates, but species with the opposite trait values were not associated with wet climates. Directional selection for traits consistently occurred in cold or dry climates, whereas a diversity of root trait values were equally viable in warm or wet climates. Explicit integration of unidirectional benefits into ecological theory is needed to advance our understanding of the consequences of trait variation on species responses to environmental change., sPlot was initiated by sDiv and funded by the German Research Foundation (FZT 118) and is now a platform of iDiv. The sRoot workshops and L.M. were also supported by NWO-Vidi grant 864.14.006. C.M.I. and the Fine-Root Ecology Database were supported by the Biological and Environmental Research program in the US Department of Energy’s Office of Science. J.B. was supported by Deutsche Forschungsgemeinschaft (DFG) project 432975993. N.R.G.-R. thanks the Dorothea Schlözer Postdoctoral Programme of the Georg-August-Universität.

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results