Occurrence and selected morphometric features of debris flow tracks in the Tatra mountains and the Karkonosze mountains [Wystepowanie i wybrane cechy morfometryczne szlakow splywow gruzowych w tatrach i karkonoszach]
Jurczak P.,University Slqski |
Migon P.,Instytut Geografn I Rozwoju Region a in Ego |
Kaczka R.J.,University Slqski
Czasopismo Geograficzne | Year: 2012
Debris flows belong to the key geomorpliological processes which shape hillslopes in high mountains and steep slopes of medium-altitude mountains located above the tim- berline. In Poland, debris flows occur frequently in the Tatra Mountains and, less commonly, in the Karkonosze Mountains, while in other mountain ranges they occur incidentally or not at all. This paper presents results of typological and morphometric analysis of debris flow tracks identified in the Tatra Mts by means of orthophotomap (dated 1999) interpretation and measured using ArcGIS 9.2. software, whereas field geomorpliological mapping provided raw data for debris flow tracks in the Karkonosze Mts. The entire populations of tracks were subject to analysis, i.e. 418 tracks from the Tatra Mts and 83 tracks from the Karkonosze Mts. Typology of debris flow tracks proposed in this paper includes six categories, reflecting morphological characteristics of source, transfer and depositional areas. We found evident differences between the High Tatra. Western Tatra and the Karkonosze. consistent with the main geomorphic features of each mountainous terrain. In the High Tatra debris flows generated on regolith-covered slopes occur with an almost identical frequency (43.4%) as flows supplied by debris accumulated in ravines dissecting rock slopes (41.5%). In the Western Tatra the respective values are 67.5% and 24%, while in the Karkonosze Mts they are 56.6% and 33.7%. However, in respect to the latter figure. 22 out of 28 tracks of this type occur in one locality - in the Wielki Sniezny glacial cirque. In the Tatra Mts 26 debris flow tracks exceed 500 111 long, whereas in the Karkonosze only one track attains this length. However, the mean lengths are similar, just above 200 m. The problem of hazards posed by debris flows is briefly discussed. The risk is generally very low. but debris flows occasionally damage transport and tourist infrastructure.
Zaton M.,University Slqski |
Taylor P.D.,Natural History Museum in London |
Jagt J.W.M.,Natuurhistorisch Museum Maastricht
Acta Palaeontologica Polonica | Year: 2013
Clusters of gastropod egg capsules, inferred to be of neritoids and attached to the inner shell wall of the ultimate whorl of a large volutid gastropod, are here recorded from the upper Nekum Member (Maastricht Formation; late Maastrichtian) of the ENCI-Heidelberg Cement Group quarry, St Pietersberg (Maastricht, southeast Netherlands). Because the aragonitic shell of the volutid has dissolved, the outlines of the egg capsules are now revealed on the steinkern of indurated biocalcarenite, having been subsequently overgrown by cheilostome bryozoan colonies and preserved as mould bioimmurations. This represents the first example of gastropod eggs preserved through bioimmuration, as well as the first record of gastropod eggs from the Cretaceous. © 2013 M. Zatoń et al.
Chlopek K.,University Slqski |
Dabrowska-Zapart K.,University Slqski
Fragmenta Floristica et Geobotanica Polonica | Year: 2011
The paper presents the results of the analysis of grass pollen seasons in Sosnowiec in 1997-2009. The aim of this study was to compare the grass pollen seasons in relation to meteorological conditions. Measurements were performed by means of the volumetric method using a Burkard spore trap. Pollen season was defined as the period in which 98% of the annual total catch occurred. To investigate the influence of meteorological conditions on the different characteristics of the pollen seasons Spearman coefficients were used. The earliest start of the season was recorded in 1999 and 2000 and the latest one in 1997. The beginning of the grass pollen season was influenced by minimum, maximum and mean temperature in March and April. The average length of pollen season was 137 days. The longest pollen seasons, which lasted 154 days were recorded in 1998 and 2001 and the shortest one in 2003 (123 days). Maximum daily pollen concentrations ranged from 101 pollen grains per m -3 air in 1998 to 495 pollen grains per m 3 air in 2000. The concentration of pollen grains showed a positive correlation with air temperature and insolation, and negative with relative humidity and precipitation. Daily pollen concentrations also depended on wind direction.
Babczynska-Sendek B.,University Slqski |
Blonska A.,University Slqski |
Skowronek I.,University Slqski
Fragmenta Floristica et Geobotanica Polonica | Year: 2014
The paper concerns 6 new localities of Gentiana cruciata in the Kraków-Czȩstochowa Upland. The size of the populations and the details of their occurrence are reported. The type of phytocoenoses, habitat conditions and threats are described. The new records of G. cruciata are presented on the map on the background of its previous distribution, according to the ATPOL 2 km × 2 km grid. It is concluded that the local range limit of G. cruciata in the Kraków-Czȩstochowa Upland has changed. Moreover, an attempt to estimate the age of newly found populations is undertaken.