Science and earth science

Studia Quaternaria

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Studia Quaternaria | 2008 | Vol. 25 |

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Abstract

Samples for the study were collected from, known from the literature, outcrop profiles in Zarzecze, Radymno, Dybawka, Tarnawce and Pikulice-Nehrybka, situated at the Carpathian border, in the vicinity of the Przemyśl town, close to the San River valley (SE Poland). They represent the Vistulian loess-palaeosol sequences. Carbonates occur mainly in the loesses representing OIS 2 and 3. Pollen analysis, carried out for two profiles (Tarnawce, Radymno), throws light on palaeoecological conditions of loess cover formation and transformation.Isotopic analysis of authigenic carbonates was carried out on carbonate cemented bodies dispersed throughout the loess in forms of nodule, rhizolith and rhizocretion and on bioclasts, mainly snail shells, ostracod valves, and sparse globules (probably the internal shells of the naked snails).In the successions studied, the upper Vistulian loess deposited in environment with poor vegetation, contains rhizo- liths and rhizocretions mainly, while in the middle and lower Vistulian loess with well developed soils, gley horizons, and intercalations of subaqueous sediments, remains of snail shells and ostracod valves prevail. The two main forms of carbonates differ markedly in isotopic composition from one another. These differences seem to be more important than those between samples of one form of carbonates along particular sections. That is the result of numerous factors affecting the fractionation of carbon and, in particular, oxygen stable isotopes in the environment of precipitation of authigenic calcite. The isotopic composition of carbonates cementing sediments is controlled mainly by biominerali- zation of organic matter and local climatic parameters which were rather slightly differentiated during the formation of the studied sediments. The d13C values for bioclasts vary in a broader range than for calcitic cements. Usually the snail shell carbonate is more enriched with heavier carbon isotope than that from ostracod valves, resulting from the isotopic equilibrium with precipitation and with surface waters, respectively. Basing on our study we can conclude that fluctuations of isotope composition of authigenic carbonates make it hard to apply as a paleoclimatic indicator. However, the general trend of d18O variation in analysed carbonate fractions from leoss-palaeosol sequences displays some connections with climatic fluctuations.

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Authors and Affiliations

Bożena Łącka
Maria Łanczont
Maryna Komar
Teresa Madeyska
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Abstract

This paper presents results of investigation on peat and lacustrine sediments from the Kładkowe Bagno peat-bog located in the Puszcza Knyszyńska Forest. Using analysis of plant remains from sediment samples, vegetative and generative finds were identified which allowed describing peat units. Basing on these results, reconstruction of subfossil vegetation and palaeoenvironmental changes in the mire was made. Altogether 4 subassociations of Sphagnetum magellanici were described, which delivered information about humidity of the mire surface during peat forming processes. Stages of deposit development were dated by radiocarbon method. Accumulation of the oldest sediments in the southern basin took place in the Late Glacial. Peat of the northern basin started to accumulate in the Atlantic period. The both parts of the mire aggregated probably 400 years ago.

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Authors and Affiliations

Danuta Drzymulska
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Abstract

Analyses of subfossil cladocerans (Crustacea: Cladocera) and chironomids (Diptera: Chironomidae) were applied to examine water-level changes in a small and oligotrophic lake in southern Finland over the past 2000 years. Major changes in the invertebrate communities occurred ca. 400 AD onwards when the littoral cladoceran Alonella nana started to replace the planktonic Eubosmina as the dominant species and chironomids Psectrocladius sordidellus group and Zalutschia zalutschicola increased. These changes were most likely due to a decreasing water level and an enlarging proportion of the littoral area, providing suitable vegetative habitats, e.g. aquatic bryophytes (mosses), for these taxa. The lowering water level reached its minimum just before the Medieval Warm Period, ca. 800-1000 AD, after which the lake level rose again and remained high until modern times. A prominent change in the chironomid assemblages occurred during the 20th century when Ablabesmyia monilis and Chironomus anthracinus type increased, presumably due to changes in water chemistry, caused by anthropogenic load of pollutants.

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Authors and Affiliations

Liisa Nevalainen
Tomi P. Luoto
Kaarina Sarmaja- Korjonen
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Abstract

Subfossil remains of a new species of Cladocera (water fleas) of the family Chydoridae in Finland, Alona werestschagini Sinev, were found in the sediments of four lakes above the treeline in northernmost Finnish Lapland. The remains were found in surface sediments of three lakes and in early Holocene sediments of one lake where the species was a pioneer which soon disappeared. The remains of A. werestschagini, except the male postabdomen, closely resemble Alona guttata. In Eurasia A. werestschagini has a wide but patchy distribution in cold climates, suggesting that it is a postglacial relict adapted to cold climate and oligotrophic lakes. Recently it has been found also in Norway and Kola Peninsula. The early Holocene finds indicate that the species spread to northernmost Finland after the retreat of the Scandinavian Ice Sheet. Since the species has been found in lakes in very severe conditions it may be used as a palaeolimnological indicator in sediment studies.

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Authors and Affiliations

Kaarina Sarmaja- Korjonen
Artem Yu. Sinev
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Abstract

This paper gives a description of the head shield of Alona protzi, a rare species of Cladocera (water fleas) whose separated head shield has not yet been described in detail. Subfossil head shields of A. protzi were found in sediment cores taken from lakes in Denmark, Sweden, Finland, Estonia and Poland. Despite the rarity of the species this suggests a wide distribution of A. protzi in northern Europe. The ecology of A. protzi is poorly known. The environmental spectrum of the finding sites was wide and ranged from relatively nutrient poor clear water lakes to eutrophic turbid water lakes, indicating that A. protzi is not narrowly restricted. Most of the lakes were, however, meso-eutrophic with neutral to high pH, and with a relatively low abundance of submerged macrophytes. However, we cannot exclude the possibility that A. protzi mainly lives in groundwater and is only occasionally transported into lakes.

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Authors and Affiliations

Rikke Bjerring
Mirva Nykänen
Kaarina Sarmaja-Korjonen
Artem Sinev
Karina Jensen
Liisa Nevalainen
Krystyna Szeroczyńska
Edyta Zawisza

Editorial office

Editorial Board:

 

Editor-in-Chief:

Leszek Marks, Faculty of Geology, University of Warsaw, Poland

Co-editors:


Mirosława Kupryjanowicz, Faculty of Biology and Chemistry, University of Białystok, Poland
Fabian Welc, Institute of Archaeology, Cardinal Stefan Wyszyński University, Warsaw, Poland
Barbara Woronko, Faculty of Geology, University of Warsaw, Poland

Secretary:

Joanna Mirosław-Grabowska, Institute of Geological Sciences, Polish Academy of Sciences, Warsaw, Poland

Editorial Advisory Board:

T. Madeyska (Chairman), Polish Academy of Sciences, Warsaw, Poland
S.W. Alexandrowicz, Academy of Mining and Metallurgy, Cracow, Poland
K.E. Behre, Niedersachsisches Institut für Historische Küstenforschung, Wilhelmshaven, Germany
J. Ehlers, Geologisches Landesamt, Hamburg, Germany
P. Gozhik, Ukrainian Academy of Sciences, Kiev, Ukraine
V. Ložek, Czech Academy of Sciences, Prague, Czech Republic
J.E. Mojski, Gdansk University, Gdańsk, Poland
J. Rose, University of London, London, United Kingdom
K. Rotnicki, Adam Mickiewicz University, Poznań, Poland
L. Starkel, Polish Academy of Sciences, Cracow, Poland
M. Sturm, EAWAG-ETH, Zürich, Switzerland
J. Vandenberghe, University of Amsterdam, Amserdam, The Netherlands
K. Wasylikowa, Polish Academy of Sciences, Cracow, Poland

Contact


Studia Quaternaria,


Committee for Quaternary Research


ul. Twarda 51/55, 00-818 Warsaw, Poland



e-mail: sq@twarda.pan.pl



http://www.studia.quaternaria.pan.pl

Instructions for authors

The language of the journal is English. Submissions may be in the form of articles, brief reports, discussions, or paper/book reviews. Studia Quaternaria accepts papers of moderate length. Longer manuscripts should be agreed with the Editor-in-Chief.

All submitted manuscripts are reviewed initially by editorial staff. Manuscripts with insufficient priority for publication are rejected promptly. Other manuscripts are sent to at least two independent expert consultants for peer review. Manuscripts are evaluated on the originality of data, interpretations, and ideas, and on the degree to which their findings can be generalized. In case of contradictory opinions additional reviewers are sought. Articles accepted for publication are instantly published inthe "in press" section. In printed version they usually appear in order of acceptance.

http://www.studia.quaternaria.pan.pl/SQ-author.html

Open Access policy

Studia Quaternaria są czasopismem wydawanym w wolnym dostępie na licencji CC BY-NC-ND 3.0. https://creativecommons.org/licenses/by-nc-nd/3.0/

Studia Quaternaria is an open access journal with all content available with no charge in full text version. The journal content is available under the licencse CC BY-NC-ND 3.0 https://creativecommons.org/licenses/by-nc-nd/3.0/.

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