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- Title
Horské růžencové toky v arkto-alpínské tundře Krkonoš, Vysoké Sudety.
- Authors
ŠTURSA, JAN; JENÍK, JAN; DVOŘÁK, IGOR JAN; HARČARIK4, JOSEF; JANKOVSKÁ, VLASTA; SOUKUPOVÁ, LENKA; VANĔK, JAN
- Abstract
The uppermost spring reaches of Labe, Mumlava, Bílé Labe, Úpa, Łomniczka and Łomnice rivers in the Giant Mts. (Krkonoše in Czech, Karkonosze in Polish) create sequences of rounded pools and short channels which resemble the arctic beaded streams described in arctic/subarctic regions of Eurasia and North America. Despite the absence of permafrost, Giant Mts' mountain beaded streams are affected by a broad range of environmental processes encountered in the cryovegetation zone of the arcticalpine tundra. The following factors take part: (1) geomorphologic (flat palaeorelief with regolith, locally covered by humolith, (2) climatic (quasiperiglacial environment with soil regelation and marked impact of water erosion and nivation), (3) hydrological (frequent alteration of the Froude number, flow around the ice blocks in the pools) and (4) biotic factors (plant succession, regen-eration of clonal graminoids and bryophytes, burrowing activity of rodents). Polygenetic mountain beaded streams in the Giant Mountains started developing in the Subatlantic period, not earlier than 2000 years B P. They exemplify a legible complex of antagonistic and stabilization processes.
- Subjects
KRKONOSE (Czech Republic &; Poland); CZECH Republic; TUNDRAS; REGOLITH; NIVATION; RIVERS
- Publication
Opera Corcontica, 2012, Vol 49, p145
- ISSN
0139-925X
- Publication type
Article