Hummock Grasses on the Mt. Keprník: Contribution to the Earth Hummocks Origin Discussion
1.
SYSNO ASEP
0348996
Document Type
C - Proceedings Paper (int. conf.)
R&D Document Type
Conference Paper
Title
Hummock Grasses on the Mt. Keprník: Contribution to the Earth Hummocks Origin Discussion
Author(s)
Hrádek, Mojmír (UGN-S)
Source Title
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.
- ISBN 978-80-86561-32-5
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.
