Long-term recruitment dynamics of arctic dwarf shrub communities in coastal east Greenland |
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| Institution: | 1. Department of Geography, University of Cambridge, Downing Place, CB2 3EN, UK;2. Swiss Federal Research Institute WSL, Zürcherstr 111, 8903 Birmensdorf, Switzerland;3. Global Change Research Centre and Masaryk University Brno, Kotlářská 2, 613 00 Brno, Czech Republic;4. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, IANIGLA, CCT-CONICET-Mendoza C.C. 330, 5500 Mendoza, Argentina;5. Landscape Ecology, University of Freiburg, Tennenbacherstr. 4, 79106 Freiburg, Germany;6. Forest Unit Soonwald, Forsthaus Wildburg, 55471 Tiefenbach, Germany;7. Department of Geobotany, University of Freiburg, Schänzlestr. 1, 79104 Freiburg, Germany;1. Key Laboratory of Ecohydrology in Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu Province, 730000, China;2. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu Province, 730000, China;1. Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ, USA;2. Faculty of Geography, M.V. Lomonosov Moscow State University, Moscow, Russian Federation;3. Severtsov Institute of Ecology and Evolution, RAS, Moscow, Russian Federation;4. Department of Environmental Sciences, Huxley College, Western Washington University, Bellingham, WA, USA;5. School of Informatics, Computing, and Cyber Systems, Northern Arizona University, Flagstaff, AZ USA;6. Institute of Geography, RAS, Moscow, Russian Federation;1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing, 100081, China;1. Institute of Botany and Landscape Ecology, University Greifswald, Soldmannstr. 15, 17487 Greifswald, Germany;2. Department of Environmental Security, Faculty of Logistics and Crisis Management, Tomas Bata University in Zlín, nám. T.G. Masaryka 5555, 760 01 Zlín, Czech Republic;1. Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland;2. Plant Ecology Group and Nature Conservation, Wageningen University & Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands;3. Swiss Federal Research Institute WSL, Zuercherstrasse 111, 8903 Birmensdorf, Switzerland;4. Institute for Biological Problems of the Cryolithozone, Siberian Branch, Russian Academy of Sciences, 41 Lenin Prospekt, Yakutsk, Republic of Sakha (Yakutia) 677980, Russian Federation;5. Institute for Natural Sciences of North Eastern Federal University, 58 Belinskogo st., Yakutsk, Republic of Sakha (Yakutia) 677000, Russian Federation |
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| Abstract: | Warming-induced biological and ecological responses have been reported from high-northern latitude sites, where changes in dwarf shrub communities translate into complex vegetation-climate feedbacks. Most of the available Arctic tree-ring evidence is, however, restricted to a limited number of species and locations. A combination of wood anatomical and ‘dendro’-ecological techniques provides insights into past growth rates, recruitment dynamics and even community assemblages of Arctic vegetation. Here, we use thin sectioning and ring counting of 1432 dwarf shrub samples from eight species and two tundra regions in coastal east Greenland to assess community recruitment history and its relation to climate. Site and species-specific annual stem increments, as well as estimated plant ages, range from 0.013-0.720 mm and from 4 to 204 years, respectively. The mean ring width is 0.086 mm, with a mean age of 50 years. Decadal-scale recruitment dynamics of the studied vegetation cover respond to Greenlandic summer temperature variations back to the late 19th century (r = 0.7; 1881–2000). |
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| Keywords: | Arctic greening Community ecology Dwarf shrubs East Greenland Global warming Tundra ecosystems Vegetation dynamics |
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