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Tytuł:
Palaeoecology of the Holsteinian lake in vicinity of Wilczyn (eastern Poland) based on molluscan studies
Autorzy:
Szymanek, M.
Tematy:
palaeoecology
molluscs
Holsteinian
lacustrine sediments
Pokaż więcej
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2060329.pdf  Link otwiera się w nowym oknie
Opis:
Malacological studies of two profiles of the Holsteinian (Mazovian) Interglacial from eastern Poland – Roskosz and Wilczyn 1/12 – are presented. They are connected with the northern part of the Wilczyn palaeolake and seems to document palaeoecological changes in the part of the climatic optimum and the post-optimal period. Mollusc communities are typical of lake environs. The latter is supported by biometry of Pisidium moitessierianum. Higher energy conditions are evidenced by rheophile species P. henslowanum and P. nitidum in the lowermost part of the Roskosz section. Mollusc assemblages with Lithoglyphus jahni, with Valvata piscinalis and Bithynia tentaculata as well as with Valvata piscinalis are distinguished at Roskosz. They record changes in aquatic vegetation and depth conditions. Malacofauna from Wilczyn 1/12 is dominated by V. piscinalis, V. piscinalis f. antiqua and B. tentaculata. Limited contribution of temperate gastropods Viviparus diluvianus and L. jahni as well as the occurrence of some cold-loving forms indicate a deterioration of thermal conditions. Shallow-water habitats and expansion of reed zones are inferred from proportions of Bithynia shells and opercula.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ostracoda of the Eemian Interglacial at Kruklanki in NE Poland
Autorzy:
Namiotko, Tadeusz
Szczechura, Janina
Namiotko, Lucyna
Tematy:
NE Poland
Eemian Interglacial
lacustrine chalk
ostracods
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/2027451.pdf  Link otwiera się w nowym oknie
Opis:
The assemblage of lacustrine ostracods found in the Eemian Interglacial sediments at Kruklanki (Masurian Lake Dis- s q trict, northeastern Poland) contains 18 species belonging to 13 genera. The most dominant species are Candona neglecta Sars, 1887, Limnocytherina sanctipatricii (Brady et Robertson, 1869), Limnocythere inopinala (Baird, 1843) and Candona candida (O.F. Muller, 1776). Cyclocypris serena (Koch, 1838), llyocypris decipiens Masi, 1905, Pseudocandona insculpta (G.W. Muller, 1900) and Leucocythere mirabilis Kaufmann, 1892 are recorded for the first time from the Eemian of Poland; the latter two species are also new for the Eemian lacustrine deposits of Europe. The ecological requirements of the recognised ostracod species as well as their geographic ranges in the Quaternary of Europe are summarised. Based on these data, past habitat type is estimated as a deeper littoral of a lake with reasonably cold, well-oxygenated and calcium-rich waters. The present state of knowledge of the Eemian ostracods from Poland is reviewed and their comparison with the Eemian ostracod assemblages from Europe is briefly given. Comparison of the ostracod fauna! assemblage from Kruklanki with those from other Eemian sites in Poland enables to establish and describe one general type of ostracod assemblages characteristic for lacustrine littoral in this interglacial.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sustainable Development of the Urban Agglomeration through the Creation of an Urban Network of Protected Areas: Case Study of Kyiv City Urban Ecosystem
Autorzy:
Radomska, Margaryta
Cherniak, Larysa
Horobtsov, Innokentii
Kolotylo, Olexandra
Tematy:
urban environment
eco-network
protected areas
lacustrine ecosystem
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Wydawca:
Wyższa Szkoła Bankowa w Poznaniu
Powiązania:
https://bibliotekanauki.pl/articles/1391000.pdf  Link otwiera się w nowym oknie
Opis:
The need for improvement of the environment quality at the territory of cities is directly conditioned by its impact on the health of humans. At the same time humans are not the only residents of urban ecosystems, but they are also inhabited by other organisms, using city as their habitat. The growth of cities is a stable trend of the modern times and it comes into conflict with wildlife living activity and quality of environment. Sustainable development of cities is impossible without environment protection, economic progress and benefits for local communities, therefore the creation of protected areas groups within the city of Kyiv is offered as an instrument for biodiversity support and urban ecosystem stabilization. The most important requirements to the sites to be included into the system of protected areas have been formulated. The first two cores are developed based on small lakes, which are characterized with environmental, recreational and wildlife support potential. The benefits from the creation of the urban network of protected areas have been defined for urban ecosystem and social and economic situation in the city.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lacustrine chalk deposition in Lake Kruki in (NE Poland) as a result of decalcification of the lake catchment
Autorzy:
Gąsiorowski, Michał
Tematy:
Kruklin Lake
lacustrine chalk
decalcification
Holocene
NE Poland
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/2026786.pdf  Link otwiera się w nowym oknie
Opis:
Lacustrine chalk is very common in post-glacial lakes of northern Poland. In the deposit of Lake Kruk lin (NE Poland) carbonates occur as a layer 2-3 m thick. Samples for laboratory studies were collected from three profiles in SW part of the deposit. Mineral composition of the sediments was determined using differential thermal analysis (DT A) and thermogravimetry analysis (TGA), while the age was determined on the basis of pollen analysis. The sediment profiles represent an age of early Holocene. Calcite is the major component of lacustrine chalk. It forms small crystals (
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differences in the development of the Szczecin Lagoon area in the Late Glacial and Holocene based on the geochemical analysis of carbonate sediments from Lake Nowowarpieńskie (NW Poland)
Autorzy:
Strzelecka, Agnieszka
Wróbel, Rafał
Tematy:
lacustrine chalk
geochemistry
energy dispersive spectroscopy
Littorina transgression
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Wydawca:
Łódzkie Towarzystwo Naukowe
Powiązania:
https://bibliotekanauki.pl/articles/2037033.pdf  Link otwiera się w nowym oknie
Opis:
This paper presents the results of geochemical analysis performed for the more-than-10-m-long core of sediments derived from Lake Nowowarpieńskie. Contrary to what its geographical name would suggest, it is in fact a peripheral bay  of the Szczecin Lagoon (NW Poland). A characteristic feature of the sedimentary cover of this water body is the several-metre-thick layer of lacustrine chalk, which is unique in the lithology of the sediments of today's Szczecin Lagoon. This sediment has been analysed using atomic absorption spectrometry (AAS), energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM) imaging. The chalk sediment from Lake Nowowarpieńskie is of chemical origin, bearing no fragments of vascular plants, but only traces of C-org in the form of small plant remains. The analysis of individual crystals using the EDS method also show Ca contents of over 99%. SEM images reveal that the sediment is characterised by a loose, disordered pack-ing of individual crystals, often combined to form aggregates with a tabular structure. The individual calcite grains are usually a few micrometres in size, while developed ones are mostly hypidiomorphic and show signs of corrosion. The sedimentation of the lacustrine chalk indicates that the post-glacial natural development of this part of what today constitutes Szczecin Lagoon differed from that of the rest of the lagoon. This sediment was deposited in a shallow but fertile isolated lake. The full profile of sediments from Lake Nowowarpieńskie reveals its distinct bipartite character, indicating two main stages of its evolution: carbonate and post-carbonate. In the first, the water body showed similarities to the neighbouring lakes of the Wkrzańska Plain. Its evolution was driven by climatic factors. The second stage was initiated by a palaeohydrological factor – Littorina transgression, which resulted in the lake being included into the hydrological system of the Szczecin Lagoon.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TL age of Upper Pleistocene stratified deposits measured using the additive, regeneration and R_ methods
Autorzy:
Fedorowicz, S.
Tematy:
Lithuania
Pleistocene
thermoluminescence
TL age
laminated lacustrine sand
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Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2058930.pdf  Link otwiera się w nowym oknie
Opis:
Stratified sands, which are components of the glacial and interglacial Vilkišks and Tartokai profiles (Lithuania), were used as research material for experimental dating with the TL method. Sieve analyses of samples collected from stratified sands show varying grain-sizes in the samples, with domination by different fractions indifferent samples. Four aliquot of grains of the same diameter were selected from each sample for further research by means of the additive, regeneration and R methods. The results showed some consistent patterns, which suggest a direction that future studies could take on these deposits samples. It is necessary, though, to examine grains which comprise a substantial percentage share in the total sample mass.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Skutki spowolnienia przekształcania siedlisk hydrogenicznych w wyniku zaniechania eksploatacji kredy jeziornej
Consequences of the decrease of hydrogenic sites transformations as a result of discontinuation of lacustrine chalk exploitation
Autorzy:
Lemkowska, B
Tematy:
retardacja
kreda jeziorna
wapnowanie
retardation
lacustrine chalk
liming
Pokaż więcej
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:
https://bibliotekanauki.pl/articles/399517.pdf  Link otwiera się w nowym oknie
Opis:
Największe wydobycie kredy jeziornej (3,5 mln t • rok-1) miało miejsce w latach 90-tych XX, kiedy transport nawozów wapniowych był dotowany. Od momentu zaniechania wsparcia finansowego dla producentów, wydobycie kredy zostało zahamowane. Aktualnie wydobycie ma miejsce tylko na jednym obiekcie spośród 176 udokumentowanych złóż. Jego zasoby bilansowe 165 tys. ton są pomniejszane rocznie o 16 tys. ton. Zaniechano wydobycia na 68 obiektach, przy czym w 7 przypadkach wyeksploatowano złoże. Wstrzymanie eksploatacji spowodowało zmniejszenie zużycia nawozów wapniowych z 200 kg CaO do 37 kg • ha-1 • rok-1. Tereny poeksploatacyjne tylko częściowo zrekultywowano, formując zbiorniki wodne, zalesiając, tworząc antropogeniczne grunty orne. Część pozostawiono bez uporządkowania terenu, porzucając elementy infrastruktury wykorzystywanej podczas eksploatacji. Dawne mokradła zostały przekształcone geomechanicznie i są wykorzystywane jako nielegalne wysypiska śmieci. Retardacja eksploatacji zasobów kredyjeziornej zapewnia zachowanie złóż, prolongatę funkcjonalności ekosystemów w stanie utrzymaniaświadczonych przez nie usług. Wiąże się również z zaniechaniem wapnowania gleb i negatywnymi skutkami postępującego ich zakwaszenia.
The greatest exploitation of lacustrine chalk (3.5 million t per year) was noted in the 90. of 20th century when the transport of calcareous fertilizers was subsidized by the government. Since the financial support was desisted, the excavation of the chalk was stopped. Now, the excavation of chalk takes place only at one site, among 176 documented ones. Its resources of 165,000 t are decreased by 16,000 t every year. The exploitation was stopped at 68 sites, among which seven were completely exploited. The reduction in exploitation resulted in decreasing calcareous fertilization from 200 kg CaO to 37 kg CaO per hectare per year. After exploitation, these areas were partly reclaimed andtransformed into water bodies, forests, anthropogenic arable lands. Some areas were left unarranged with parts of infrastructure used during exploitation. Former wetlands were geomechanically transformed and are used as illegal landfills. Retardation of lacustrine chalk exploitation saves the deposits and maintains the ecosystem functions. It is also associated with decreasing soil liming and negative effects of acidification.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pedogenic and lacustrine features of the Brushy Basin Member of the Upper Jurassic Morrison Formation in western Colorado: Reassessing the paleoclimatic interpretations
Autorzy:
Tanner, L.
Galli, K.
Lucas, S.
Tematy:
aridisol
inceptisol
calcrete
palustrine
lacustrine
pedogenesis
pedogeneza
jeziorny
bagienny
Pokaż więcej
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2077335.pdf  Link otwiera się w nowym oknie
Opis:
Study of the pedogenic features of the Upper Jurassic Morrison Formation in western Colorado, USA, shows a clear difference in the types of paleosols between the strata of the lower and upper Brushy Basin Member. Lower Brushy Basin paleosols are mostly calcareous Aridisols with Stage I through Stage III calcrete Bk horizons, abundant root traces, occasional vertic features, but only rarely with ochric epipedons. Upper Brushy Basin paleosols are mainly thicker and commonly display ochric epipedons and well-developed Bt and Bw horizons. We assign these paleosols to the order Inceptisol. Limestones occur in the Brushy Basin Member and include both uniformly micritic limestones and limestones with strongly brecciated textures. The former contain sparse body fossils and charophyte debris, while the latter are characterized by clotted-peloidal fabrics with circumgranular cracking and silica replacement. We interpret these limestones as the deposits of carbonate in small water bodies on a low-gradient flood plain, with the textures resulting from pedogenic reworking of the carbonate sediment. We find no evidence for the presence of extensive lacustrine or wetlands (Lake T’oo’dichi’) deposits in the study area. The paleoclimate suggested by all of these features is strongly seasonal, but subject to variations on orbital (precessional and higher) timescales causing intervals of semi-aridity during weaker monsoons, to alternate with sub-humid periods during stronger monsoons. The apparent long-term change in climate during Brushy Basin deposition potentially resulted from northward drift of North America.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 72

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