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Wyświetlanie 1-9 z 9
Tytuł:
Instability of the environment at the end of the Eemian Interglacial as illustrated by the isopollen maps for Poland
Autorzy:
Kupryjanowicz, M.
Granoszewski, W.
Nalepka, D.
Pidek, I. A.
Walanus, A.
Balwierz, Z.
Fiłoc, M.
Kołaczek, P.
Majecka, A.
Malkiewicz, M.
Nita, M.
Noryśkiewicz, B.
Winter, H.
Powiązania:
https://bibliotekanauki.pl/articles/2060182.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
palaeoclimate
intra-interglacial cooling
vegetation history
isopolles
pollen analysis
Opis:
Many terrestrial pollen profiles from Poland (and a few pollen records from other parts of Central Europe) show the end of the last interglacial (Eemian, MIS 5e) to have been characterized by climatic and environmental instability. This is expressed by a strong, rapid cooling in the middle part of the pine phase ending this interglacial (E7 regional pollen assemblage zone), and then a re-warming at the very end of this phase, immediately before the transition to the glacial conditions of the last glaciation (Vistulian, Weichselian, MIS 5d). We have characterized the regional distribution of these climatic fluctuations in Poland on the basis of isopollen maps prepared for the Eemian Interglacial based on palynological data from 31 Polish pollen profiles. These maps show unequivocally that the intra-interglacial cooling at the end of the Eemian Interglacial was a transregional phenomenon, which was reflected very clearly by a temporary openness of vegetation across the whole of Poland. It was associated with a distinct decrease in pine forest areas and an increase in birch forests and open communities of cold steppe type with a domination of Artemisia. The pronounced climate and environment instability during the last phase of the Eemian Interglacial may be consistent with it being a natural phenomenon, characteristic of transitional stages. Taking into consideration the currently observed global warming, coinciding with a natural cooling trend, the study of such transitional stages is important for understanding the underlying processes of climate change.
Źródło:
Geological Quarterly; 2016, 60, 1; 225--237
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przyrodnicza historia Gniezna - plemiennego ośrodka kultu i centrum wczesnopiastowskiego państwa polskiego Civitas Schinesghe
Autorzy:
Makohonienko, M.
Kara, M.
Koszałka, J.
Powiązania:
https://bibliotekanauki.pl/articles/295250.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
Gniezno
Lech's Hill
Early Medieval stronghold
vegetation history
floristic diversity
Opis:
The stronghold complex in Gniezno located on the Lech's Hill belonged to the main centers of the early Polish State described for the first time in historical documents as Civitas Schinesghe - the Gniezno State. Recent archaeological studies indicate that the site on Lech's Hill was originally a tribal cult center. Palaeoecological studies provided records of environmental changes and cultural landscape development in the prehistoric periods and early historical times. Reconstructed changes of floristic diversity correlate well with the cultural processes.
Źródło:
Landform Analysis; 2011, 16; 39-45
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
12 millennia of climatic and human induced vegetation changes in the Lower San Valley near Jarosław (SE Poland) in the light of pollen analysis
Autorzy:
Kołaczek, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2026704.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Sandomierz Basin
pollen analysis
vegetation history
Late Glacial
Holocene
human impact
Ulmus
Opis:
Veg e ta tion changes in the Lower San Val ley near Jaros³aw are re con structed from the Youn ger Dryas to the pres ent time on the ba sis of palynological anal y sis of the peat core. The pol len pro file came from a an old riverbed and was sup ple mented by ra dio car bon datings. The Youn ger Dryas and early Preboreal veg e ta tion was char ac ter ised by a high pro por tion of for est com mu ni ties with pine (Pinus sylvestris and P. cembra) and birch (Betula), while patches of open area were dom i nated by the steppe with Ar te mi sia. Cli ma tic ame lio ra tion dur ing the Preboreal chronozone led to the rapid spread of elm (Ulmus), which was prob a bly a dom i nant taxon on the low est ter races of the val ley. Terrestrialization of the wa ter body ex ist ing in the palaeomeaner and the sub se quent be gin ning of peat ac cu mu la tion caused a de - te ri o ra tion in pol len pres er va tion. Hence, the in ter pre ta tion of the pro file sec tion span ning the pe riod be tween the Bo - real and Subatlantic chronozones was se ri ously dis turbed due to se lec tive cor ro sion and the overrepresentation of Pinus sylvestris type and Filicales monolete sporomorphs. Be tween ca. 336 and 1152 AD fluc tu a tions in wood land cover were re corded. Im por tant com po nents in those for ests, de spite the dom i na tion of Pinus sylvestris, were Quercus, Carpinus betulus, Fagus sylvatica and Abies alba. The first pol len grains of ce re als (Cerealia type) were found be fore ca. 1605–1414 BC and may be at trib uted to the ag ri cul tural ac tiv ity of the Neo lithic and/or early Bronze tribes. Pe ri - ods of strong de for es ta tion caused by hu mans were prob a bly re lated to the time when the Tarnobrzeska Group of the Lusatian Cul ture and the Przeworska Cul ture were ac tive. The first groups of Slavs did not sig nif i cantly in flu ence the en vi ron ment, but the sub se quent de vel op ment of those groups led to more vis i ble de for es ta tion, which was trig gered af ter the es tab lish ment of Jaros³aw in the 11th cen tury AD.
Źródło:
Studia Quaternaria; 2011, 28; 25-39
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Holocene palaeoenvironment of Tse Dura, a Later Stone Age (LSA) rock shelter, north-central Nigeria
Autorzy:
Orijemie Emuobosa Akpo, Orijemie
Powiązania:
https://bibliotekanauki.pl/articles/2025245.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Microliths
Vegetation history
Plant management
Tiv
Middle Benue Valley
Nigeria
Nauki o Ziemi
Opis:
Palynological and archaeobotanical analyses were conducted on excavated sediments from Tse Dura, a Later Stone Age rock shelter in north-central Nigeria with the aim of reconstructing the environment conditions at the site within the last millennium. From 933 ± 29 BP to 802 ± 29 BP, the environment alternated between Guinea savanna with dry conditions, and secondary and riverine forests with humid conditions. During these periods of environmental fluctuations, the LSA populations engaged in the management of economic plants the most significant of which included Dioscorea spp. Pennisetum glaucum and Elaeis guineensis, and exploited wild plants such as Pavetta crassipes, Sarcocephalus latifolius and Lophira cf. lanceolata for dietary and ethnomedicinal purposes. Around 310 ± 30 BP cal, the environment became very wet after which it was succeeded by a drier period. It was during this period that Sorghum bicolor became prominent, and the environment attained its current status dominated by Guinea savanna elements and secondary forests.
Źródło:
Studia Quaternaria; 2018, 35; 41-53
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lithology and biostratigraphy of the Holocene succession of Lake Kuži, Vidzeme Heights (Central Latvia)
Autorzy:
Kangur, M.
Koff, T.
Punning, J.-M.
Vainu, M.
Vandel, E.
Powiązania:
https://bibliotekanauki.pl/articles/2059201.pdf
Data publikacji:
2009
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Vidzeme Heights
Haanja Heights
pollen analysis
lithological analysis
vegetation history
lake level fluctuations
Opis:
Holocene sediment profile from a paludified near-shore area of Lake Kńži (Vidzeme Heights, Central Latvia) was investigated using lithological and palaeobotanical (pollen and macrofossil analysis) methods and accelerator mass spectrometry AMS 14C dating. The results of this first comprehensive study of a Holocene sed i ment core from the Vidzeme Heights indicate that at the beginning of the Early and at the end of the Late Holocene the lake level was low and fen peat accumulated around the lake. From ca. 9000 BP up to 1500 BP the mire was flooded and gyttja with interlayers of sand and peat accumulated. The water level fluctuations are clearly represented in the lithological succession and pollen spectra. We compared the L. Kńži pollen diagram with well-studied sites from the Haanja Heights, which have a similar genesis. The most obvious difference in these diagrams is the earlier appearance (9200 BP) of Picea pollen in the L. Kńži profile and its dominance up to 1000 BP. Compara tive analysis of the lithology and pollen spectra from L. Kńži and reference profiles from the Haanja Heights indicate the importance of broad regional factors in influencing the pollen spectra.
Źródło:
Geological Quarterly; 2009, 53, 2; 199-208
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyniki analizy pyłkowej osadów organicznych z doliny Rawki
Results of pollen analysis of organic deposits in Rawa Mazowiecka
Autorzy:
Milecka, Krystyna
Powiązania:
https://bibliotekanauki.pl/articles/578377.pdf
Data publikacji:
2013
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
analiza pyłkowa
dolina rzeczna
Rawa Mazowiecka
historia szaty roślinnej
antropopresja
pollen analysis
river valley
vegetation history
human impact
Opis:
Opracowanie dostarcza informacji dotyczących tła środowiskowego osadnictwa ostatnich około trzech tysięcy lat w dolinie Rawki w środkowej Polsce. Analizy archeologiczne osadów w dolinie rzeki wykonano w ramach prac ratowniczych przed realizowaną inwestycją budowy obwodnicy Rawy Mazowieckiej. Osady organiczne pobrane z profilu wykopu archeologicz-nego wykorzystano do badań metodą analizy pyłkowej. Pozwoliły one na odtworzenie roślinności w otoczeniu stanowiska badań oraz wyznaczenie faz aktywności człowieka.
This article gives environmental background of settlement within the last ca 3000 years in Rawka valley, central Poland. Archeological, investigations were initiated before an expressway and ring road for the town Rawa Mazowiecka construction. Samples of organic sediments were taken from the archeological profile and used for pollen analysis. Palinological diagram shows vegetation development and revealed three phases of human impact.
Źródło:
Acta Geographica Lodziensia; 2013, 101; 81-88
0065-1249
Pojawia się w:
Acta Geographica Lodziensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palynology of biogenic sediments of the Eemian Interglacial at Bieganin near Kalisz, Central Poland
Autorzy:
Malkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2058816.pdf
Data publikacji:
2003
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Central Poland
Eemian Interglacial
pollen analysis
history of vegetation
Opis:
The paper presents palynological data from Bieganin, a village located near Kalisz, Central Poland, where organic sediments were deposited in a subglacial trough dating from the Wartanian Glaciation. The succession of vegetation is characteristic of the Eemian Interglacial. The pollen diagram indicates six local pollen assemblages: B1-Pinus-Betula, B2-Betula-Pinus-Ulmus, B3-Quercus-Corylus, B4 -Corylus, B5-Carpinus-Tilia-Polypodiaceae, B6-Pinus-Picea which correlate well with regional pollen assemblages obtained by Mamakowa (1989b) and Tobolski (1991). The plant succession in Bieganin started in the beginning of the Eemian (zone E1) and ended with the development of coniferous forest (zone E6). The profile does not include the final zone, E7, of the interglacial.
Źródło:
Geological Quarterly; 2003, 47, 4; 367-372
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Early Vistulian vegetation history and climate change at Gutów (Wielkopolska Lowland) from pollen analysis
Autorzy:
Malkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059081.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Wielkopolska Lowland
Early Vistulian
pollen analysis
history of vegetation
climate changes
Opis:
Pollen assemblages in peat and silt deposits from a core drilled at Gutów, Wielkopolska Lowland, have been analysed, enabling characterization of the development of vegetation and of palaeoenviromental change. The pollen analysis shows phases with forest and open vegetation communities alternating in response to climate changes. The age of the succession can be related to the stadials and interstadials of the Early Vistulian.
Źródło:
Geological Quarterly; 2010, 54, 3; 357-366
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozwój roślinności w późnym vistulianie oraz funkcjonowanie i zanik ekosystemu leśnego w stanowisku Koźmin Las
Vegetation development in the Late Vistulian and functioning and end of the forest ecosystem in Koźmin Las site
Autorzy:
Stachowicz-Rybka, Renata
Korzeń, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1366120.pdf
Data publikacji:
2014
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
późny vistulian
dolina Warty
historia roślinności
zmiany klimatu
palinologia
analiza makroszczątków roślin
Late Vistulian
Warta River valley
history of vegetation
climatic changes
palynology
plant macrofossil analy-sis
Opis:
Artykuł prezentuje wyniki badań palinologicznych i makroszczątków roślin ze stanowiska Koźmin Las, na którym udo-kumentowano późnovistuliańskie osady, reprezentowane przez torfy i mułki organiczne oraz pozostałości lasu w postaci fragmentów pni w pozycji in situ. Badaniami paleobotanicznymi objęto dwa profile osadów – KL 1 i KL 2, przy czym analizę makroszczątków roślin wykonano tylko dla profilu KL 1. Wyróżniono kilka etapów rozwoju zagłębienia. Początkowo, w okresie allerödu deponowane były osady piaszczyste, zawierające pyłek głównie sosny i brzozy. Spadek udziału pyłku brzozy i wzrost krzywych turzycowatych i traw, a co za tym idzie większy udział w krajobrazie zbiorowisk nieleśnych wyznacza granicę z młodszym dryasem. Około 10 710 ± 60 BP / 12 744 – 12 547 cal BP nastąpił rozwój torfowiska niskiego. W wyniku podniesienia się poziomu wody i dostawy materiału terygenicznego do powstałego rozlewiska, rozwój torfowiska zakończył się. Miało to miejsce około 10 430 ± 80 BP / 12 566 – 12 067 cal BP.
The paper presents the results of studies of pollen and plant macroremains from the site of Koźmin Las, in which remnants of a forest, observed as fragmentary in situ tree trunks, and Late Vistulian sediments, represented by peats and organic silts, were preserved. Palaeobotanical analyses were performed for two sediment sections, KL 1 and KL 2, however plant macrofossils were examined only in section KL 1. Several stages were distinguished in the development of the depres-sion. Initially, in the Alleröd, the deposited sandy sediments were dominated by pine and birch pollen. Decrease in birch pollen values and the accompanying increase in curves of sedges and grasses, indicating greater proportion of non-forest communities in landscape, evidence the boundary with Younger Dryas, ca. 10 710 ± 60 BP/ 12 744–12 547 cal BP, being the time of functioning of a low peat bog. Its development ended, due to rising water level and supply of terrigenous material to the overflow area, at ca. 10 430 ± 80 BP / 12 566–12 067 cal BP.
Źródło:
Acta Geographica Lodziensia; 2014, 102; 53-63
0065-1249
Pojawia się w:
Acta Geographica Lodziensia
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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