Long-term recruitment dynamics of arctic dwarf shrub communities in coastal east Greenland

0495834 - ÚVGZ 2019 RIV IT eng J - Článek v odborném periodiku
Büntgen, Ulf - Bolze, N. - Hellmann, L. - Sittler, B. - Frauenberger, B. - Piermattei, A. - Kirdyanov, A. V. - Schweingruber, F. H. - Ludemann, T. - Krusic, P. J.
Long-term recruitment dynamics of arctic dwarf shrub communities in coastal east Greenland.
Dendrochronologia. Roč. 50, aug (2018), s. 70-80. ISSN 1125-7865. E-ISSN 1612-0051
Grant CEP: GA MŠMT(CZ) LO1415
Institucionální podpora: RVO:86652079
Klíčová slova: simulated environmental-change * surface air-temperature * vaccinium-uliginosum l * uv-b radiation * vitis-idaea l * cassiope-tetragona * climate-change * summer temperature * tundra vegetation * growth-responses * Arctic greening * Community ecology * Dwarf shrubs * East Greenland * Global warming * Tundra ecosystems * Vegetation dynamics
Obor OECD: Physical geography
Impakt faktor: 2.281, rok: 2018

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).
Trvalý link: http://hdl.handle.net/11104/0288719