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Wyszukujesz frazę "plant pollen" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Eemian and Vistulian pollen records from the Łomża region (NE Poland)
Autorzy:
Bińka, K.
Ber, A.
Bałuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059137.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Eemian
pollen
Łomża region
plant-animal interaction
Opis:
In the Łomża region, northeastern Poland, many new lacustrine and peat deposits have been found. Pollen analysis of borehole material shows that they accumulated mostly during the Eemian Interglacial. Parts of these sites were active in the Vistulian, probably in its early phases. The sites analysed usually represent small lakes or peat-bogs sediment with accumulating in different time intervals of the Eemian. Only exceptionally they are represented by deep-water facies with a decrease in water level not before the hornbeam zone, as seen at many Eemian sites in Poland. Especially interesting is the occurrence in the pollen spectra of a number of exotic taxa such as Viburnum lantana, Bruckenthalia spiculifolia, Falcaria vulgaris, Lycopodium lucidulum t. noted previously in the Eemian Interglacial mainly in the south and in the southeastern Poland, where milder climatic conditions prevailed. The analysed interglacial spectra also show signs of plant—animal interaction. Such signs have been observed in Holocene and Vistulian strata, although in other pollen taxa. Pollen affected by these processes may come to resemble other species and so be misidentified.
Źródło:
Geological Quarterly; 2006, 50, 4; 437-446
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Upper Pleistocene palaeoenvironmental changes at the Zwierzyniec site, Central Poland
Autorzy:
Kalińska-Nartiša, E.
Dzierżek, J.
Bińka, K.
Borkowski, A.
Rydelek, P.
Zawrzykraj, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059945.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
pollen
plant macrofossils
glaciolacustrine
Eemian–Vistulian sequence
palaeoenvironment
Central Poland
Opis:
The paper presents the data on an Eemian–Late Glacial sedimentary sequence from the Zwierzyniec site, central Poland. A number of boreholes document one or two organic layers that occur beneath one or two horizons of clayey and silty deposits of ice-dammed lakes. This study demonstrates to which extent the Zwierzyniec site can contribute to a better understanding of the palaeoenvironmental changes during the Eemian–Vistulian time-frame in central Poland. To study it, a multi-proxy approach was applied, involving: palynological and plant macrofossil analysis, study of rounding of quartz grains and morphology of their surface, and investigations of sand mineralogy and till petrography. The results show that a till bed is overlain by a sandy series corresponding to the glacial-interglacial transition. Either one or two distinct peaks of organic accumulation are evidenced by peat horizons. The lower horizon records spectra with hazel and hornbeam, and did, therefore, accumulate in the Eemian. Observed only in some boreholes, the upper peat horizon marks the Brørup (or the lower part of the Rederstall stadial) represented by forest-steppe conditions with patchy mosaics of larch and further transition into sedges and herbaceous taxa. Localized in between the two peat sequences, the sandy horizon marks a long-lasting aeolian transformation with weathering by frost in the Early Vistulian. Again, significant changes of the palaeoenvironmental regime occurred, and are manifested in the one or two horizons of the glaciolacustrine sediments. This corresponded to the last glaciation in the region, when the ice-dammed lakes formed during the Main Stadial.
Źródło:
Geological Quarterly; 2016, 60, 3; 610--623
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Post-glacial vegetation and environment of the Labanoras Region, East Lithuania: implications for regional history
Autorzy:
Gaidamavičius, A.
Stančikaite, M.
Kisieliene, D.
Mažeika, J.
Gryguc, G.
Powiązania:
https://bibliotekanauki.pl/articles/2059149.pdf
Data publikacji:
2011
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
E Lithuania
post-glacial
environment
vegetation dynamics
plant macrofossil
pollen
Opis:
Multiproxy data (pollen, plant macrofossils, 14C dates and loss-on--ignition measurements) obtained from the Bevardis and Verpstinis lakes in the Labanoras area (East Lithuania) were used to reconstruct a vegetation history and to reveal major environmental features during post-glacial time. Biostratigraphical data indicates ongoing sedimentation in Verpstinis Lake since the final stages of the AllerÝd. The pollen data shows that Pinus-dominated forest flourished during the AllerÝd, while the Younger Dryas was characterized by open shrub/herb/grass vegetation with highly abundant Juniperus. These are evidences of severe climatic conditions in the area. The 14C data suggests that sedimentation started in Bevardis Lake with the onset of the Holocene. Picea immigrated into the Verpstinis Lake surroundings in the Late Glacial, just before 11 500 cal yr BP according to the palynological evidence. The expanding deciduous taxa, e.g., Corylus (ca. 10 200-10 000 cal yr BP), Alnus (8200-8000 cal yr BP), and broad-leaved species with Ulmus (ca. 10 000 cal yr BP), Tilia (7700-7400 cal yr BP) and Quercus (5200 cal yr BP), formed a dense mixed forest where Picea appeared at 7300-6800 cal yr BP. Both diagrams show only negligible human impact. It seems that natural factors were responsible for the formation of vegetation cover and environment in the study area throughout the post-glacial.
Źródło:
Geological Quarterly; 2011, 55, 3; 269-284
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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