Hummock Grasses on the Mt. Keprník: Contribution to the Earth Hummocks Origin Discussion

0348996 - ÚGN 2011 RIV CZ eng C - Conference Paper (international conference)
Hrádek, Mojmír
Hummock Grasses on the Mt. Keprník: Contribution to the Earth Hummocks Origin Discussion.
Geomorfologický sborník 9, Stav geomorfologických výzkumů v r.2010. Praha: Univerzita Karlova v Praze, Přírodovědecká fakulta, 2010 - (Křížek, M.; Nyplová, P.; Vočadlová, K.; Borská, J.), s. 76-77. ISBN 978-80-86561-32-5.
[Stav geomorfologických výzkumů v roce 2010 /11./. Praha (CZ), 11.05.2010-13.05.2010]
Institutional research plan: CEZ:AV0Z30860518
Keywords : Hrubý Jeseník Mts. * earth hummocks * hummock grasses
Subject RIV: DE - Earth Magnetism, Geodesy, Geography

Proofs submitted hitherto in evidence of earth hummocks cryogenic origin have been found as little probative. In presented poster, the attention was focused on the role of vegetation in hummocks origin. Some of hummocks are formed by dominant grass tussock with special habitus. Hummock grasses in the genus Carex sp., Eriophorium sp., resp. Juncus trifidi and Deschampsia sp. grow as an expanding dome, with green leaves in the centre and dead leaves at outer margin. Layer of dry leaves may be up to 5 cm thick and can serve as heat-insulation layer protecting frozen ground thawing in spring-time. Similar grass hummocks are typical not only for wind-swept alpine grasslands but also for low ranges and plains.
Permanent Link: http://hdl.handle.net/11104/0189352