Browsing by Subject "malacofauna"

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Access status: Open Access ,
Kamieniołomy surowców węglanowych w regionie świętokrzyskim przykładem korytarzy ekologicznych
(2007) Barga-Więcławska, Jadwiga
Studies of malacofauna and vegetation in quarries of carbonate rocks in the Swiętokrzyskie region were carried out in the period between 1999-2005. The investigations were conducted on waste heaps and workings, and demonstrated the differences in ecological conditions between heaps and workings. Snail studies were performed using the quantitative method. The study revealed the presence of 57 snail species which constitutes 58% of all snail species occurring in the Świętokrzyskie Mountains. The most abundant snail communities were observed in the »Zygmuntówka« quarry, in »Miedzianka« and »Wietrznia« quarries, and in the area of the historical galena mine on Karczówka in Kielce. Terrains changed by mining are habitats of rare and endangered plant and snail species. The following snail species should be mentioned: Cecilioides acicula, Clausilia bidentata, Acantinula aculeate, Trichi lubomirski, Helix pomatia and Helix lutescens. Nine southern species were identified. Malacofauna of post-mining areas is a manifestation of transformations progressing in natural environment of our region.
Access status: Open Access ,
Malacofauna of the Holocene tufa in the valley of the Ociemny Stream (Pieniny Mts., southern Poland)
(Wydawnictwa AGH, 2017) Alexandrowicz, Witold Paweł
A rich molluscan fauna was found in the outcrop of slope sediments and calcareous tufas in the valley of the Ociemny Stream in the Pieniny Mts. The malacological sequence identified there represents the entire Holocene, but it contains several stratigraphical gaps. From this viewpoint, it is a unique finding within the area studied. In nine samples, 11,000 specimens of 71 species of molluscs were identified. The ecological and zoogeographical diversity of the composition and structure enabled the separation of three faunistic assemblages. The oldest assemblage (with Discus ruderatus) corresponds with the cold period of the Early Holocene and represents shadowed habitats overgrown with the coniferous forests of the taiga type. Its characteristic feature is the presence of glacial relics (e.g. Vertigo genesii and Vertigo geyeri). The other younger fauna (with Discus perspectivus) is typical of the humid and warm climate of the Atlantic Phase. It is characteristic of the habitats of mixed and deciduous forests. Numerous Balkan and Mediterranean thermophilous forms appear in this assemblage. The youngest malacoenosis (with Bithynella austriaca) is typical for the historical times. The particular intervals containing molluscan fauna are separated by gaps corresponding to the erosion phases. Because of the land relief in the valley of the Ociemny Stream, which is not conducive to the development of human economy, no marked anthropogenic deforestation occurs.
Access status: Open Access ,
Malakofauna górnoholoceńskich martwic wapiennych w Beskidach Zachodnich (południowa Polska)
(Wydawnictwa AGH, 2009) Alexandrowicz, Witold Paweł
Upper Holocene calcareous tufa occur commonly in the Western Beskidy Mts. Often, at least not always they contain more or less rich and differentiated molluscan assemblages. Malacological analysis was carried out on the basis of material collected from 33 localities represented by 59 samples. The most typical communities of snails and bivalves were characterized. Four types and three subtypes of fauna differing oneself in structure and species composition have been distinguished. Malacofauna recognized in discussed calcareous deposits is closely depended on local conditions. The whole material comprises 68 species, but only a few of them occur in large numbers and in many profiles, while the remaining ones had only accesorical importance. Malacological investigations of Upper Holocene calcareous tufa are important for recognizing mechanisms of deposition such calcareous sediments and differentiation of molluscan assemblages. They can be useful for actuopelaeontological analysis essential for palaeogeographical and palaeoecological interpretations of tufas of Holocene and Late Glacial age occurred in Southern Poland.
Access status: Open Access ,
Malakofauna osadów jeziornych torfowiska Gajlik na Pojezierzu Sejneńskim (północno-wschodnia Polska)
(Wydawnictwa AGH, 2010) Alexandrowicz, Witold Paweł; Żurek, Sławomir
Malacological analysis was conducted on snails and bivalve shells present in calcareous gytia and lacustrine chalk of the Gajlik mire in the Sejny Lake District. Thirteen species of water molluscs were identified within six analyzed samples. Changes observed in the structure and composition of molluscs, supplemented by palynological data, and the results of radiocarbon datings allowed for the reconstruction of the mire's evolution during Late Glacial and Early Holocene period. Molluscs' shells occurred solely in sediments associated with warmer periods (interphase Alleröd and Preboreal-Boreal phases of Holocene). Additionally, they were not present in sediments associated with cold Late Glacial periods.
Access status: Open Access ,
Molluscan assemblages in Late Holocene deposits in Busko-Zdrój (Nida Basin, Southern Poland)
(Wydawnictwa AGH, 2013) Alexandrowicz, Witold Paweł; Gołas-Siarzewska, Magdalena
Late Holocene deposits containing abundant and well-preserved malacofauna were exposed within the Spa Park in Busko-Zdrój. Molluscan shells were found in sand, dark muds and calcareous muds. Dark and calcareous muds are intercalated by fine-grained sand and peat devoid of malacofauna. Ali these deposits were accumulated on swampy, flat bottom of wide river valley. The result of radiocarbon dating has shown that the formation of the deposits started in the upper part of the Subboreal Phase. Numerous Late Medieval portery shards were found in several topmost profile sections. The identified malacofauna suggests that similar climatic and habitat conditions prevailed throughout the entire sedimentation period. Snails typical of open habitats, accompanied by hygrophilous taxa, play a dominant role. Mesophilous and aquatic taxa occur in accessory proportions, while shadow-loving forms are virtually absent.
Access status: Open Access ,
Zespoły mięczaków w vistuliańskich lessach we wsi Chobrzany koło Sandomierza (południowa Polska)
(Wydawnictwa AGH, 2011) Alexandrowicz, Witold Paweł
Malacological analysis was conducted on shell material from loess profile in Chobrzany village located near Sandomierz. This particular profile represents a vertical wall, up to 6.5 m high. Its upper part is composed of typical, yellow loess with vertical cracks covered by recent soil. In the lower interval the occurrence of poorly visible lamination and carbonate concretions is observed. Six species of snails were identified. These belong to the so-called »loess species«. Several types of molluscan communities can be distinguished on the basis of faunistic changes. These molluscs' assemblages correspond with the palaeoenvironment and they allow for palaeoclimatic and stratigraphical reconstructions. The results of malacological analysis indicate that the loesses in Chobrzany could belong to the youngest loess sequence (Upper Younger Loess), which were deposited during Pleniglacial Phase of Vistulian.