Structure and Dynamics of Mollusk Communities of Small Oxbow Lakes and the Determining Factors (the Khoper River Valley, Penza Oblast)

The aim of the study was to analyze the relationship between hydrological conditions and morphogenesis of erosional landforms on the floodplain of the Bug river valley. It was found that forms such as side arms and oxbow lakes as a result of cyclical floods are subject to secondary erosion. The main reason for this phenomenon is the fact that they combine strings of overbank flow direction. In the case of ice storms, these forms take on the role of the main channel limiting the effects of floods.

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Reconstruction of local environments of ancient population in a changeable river valley landscape (The Middle Vychegda River, Northern Russia)

Geochronometria ◽

10.2478/s13386-011-0018-5 ◽

2011 ◽

Vol 38 (2) ◽

pp. 128-137 ◽

Cited By ~ 4

Author(s):

Victor Karmanov ◽

Natalia Zaretskaya ◽

Andrey Panin ◽

Alexey Chernov

Keyword(s):

Hydrological Regime ◽

River Valley ◽

Archaeological Sites ◽

Oxbow Lakes ◽

Lateral Migration ◽

Human Occupation ◽

Environmental Preferences ◽

Radiocarbon Dates ◽

Local Environments ◽

Northern Russia

Abstract In river valleys, both human occupation and subsequent preservation of archaeological sites are affected by active landscape transformation caused by river lateral migration, incision/aggradation cycles and changes of river hydrological regime. In the middle Vychegda River valley (Northern Russia), there are numerous traces of human presence since the Mesolithic. We exploit multi-disciplinary archaeological, geomorphological and geochronological approach to elucidate the environmental preferences of settlements positioning during different epochs of the Holocene. High resolution space image supplemented with data on alluvial stratigraphy derived from bank exposures and hand cores, as well as 51 radiocarbon dates were used to make the geomorphic map showing ages of floodplain/terrace segments and palaeochannels. Using this map together with sediment facial interpretation, position of archaeological sites was analysed in the context of local geomorphic and hydrologic situation. The majority of archaeological sites and modern settlements are found on terraces at river banks or at oxbow lakes which were well connected to the river. Few exceptions from this rule may be explained by seasonal character of dwelling functioning, ritual burial practice or specialization of settlements. Geomorphic situation was used as a background for planning further prospection of different-age archaeological objects.

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Morphodynamic conditions of heavy metal concentration in deposits of the Vistula River valley near Kępa Gostecka (central Poland)

Open Geosciences ◽

10.1515/geo-2020-0058 ◽

2020 ◽

Vol 12 (1) ◽

pp. 1036-1051

Author(s):

Agnieszka Kałmykow-Piwińska ◽

Ewa Falkowska

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Metal Concentration ◽

Clay Content ◽

Heavy Metal Concentration ◽

Depositional Environments ◽

River Valley ◽

Geological Mapping ◽

Oxbow Lakes ◽

Vistula River

AbstractThe influence of morphodynamics of individual river valley zones on the anthropogenically induced distribution of heavy metals in the Małopolska Gorge of the Vistula River near Kępa Gostecka was studied. Based on the analysis of cartographic and geological mapping data, several floodplain features were distinguished. For each feature, lithological analysis of the deposits was carried out. It comprised determination of clay content, organic matter, carbonates and iron oxides and hydroxides, as well as analysis of heavy metal concentration. The investigations show that the concentration of heavy metals in floodplain surface deposits is strictly linked with the variability of depositional environments, which reflected in the intricate feature pattern. The highest contents of heavy metals have been found in the deposits of the contemporary floodplain, stagnation zones of floodwaters, oxbow lakes buried under floodplain or organic deposits and escarpment foot back swamps, while the lowest in deposits of the Pleistocene terrace and slope wash zones. Variability of floodwater dynamics modelling the floodplain surface is associated with the specific geological setting of the Vistula River valley stretch analysed.

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Is the flora of oxbow lakes different from that of fishponds? A comparison of two types of water reservoirs in the Noteć River valley and Bydgoszcz Canal valley (NW Poland)

Ecological Questions ◽

10.12775/eq.2017.003 ◽

2017 ◽

Vol 25 ◽

pp. 27 ◽

Cited By ~ 1

Author(s):

Barbara Waldon-Rudzionek

Keyword(s):

River Valley ◽

Oxbow Lakes ◽

Water Reservoirs ◽

Nw Poland

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Nucleosome dynamics

Biochemical Society Symposium ◽

10.1042/bss0730109 ◽

2006 ◽

Vol 73 ◽

pp. 109-119 ◽

Cited By ~ 2

Author(s):

Chris Stockdale ◽

Michael Bruno ◽

Helder Ferreira ◽

Elisa Garcia-Wilson ◽

Nicola Wiechens ◽

...

Keyword(s):

High Resolution ◽

Chromatin Structure ◽

Current Knowledge ◽

Dynamic Properties ◽

Structure And Dynamics ◽

Nucleosome Dynamics ◽

Sharp Focus ◽

Recent Advances ◽

Insight Into ◽

Chromatin Structure And Dynamics

In the 30 years since the discovery of the nucleosome, our picture of it has come into sharp focus. The recent high-resolution structures have provided a wealth of insight into the function of the nucleosome, but they are inherently static. Our current knowledge of how nucleosomes can be reconfigured dynamically is at a much earlier stage. Here, recent advances in the understanding of chromatin structure and dynamics are highlighted. The ways in which different modes of nucleosome reconfiguration are likely to influence each other are discussed, and some of the factors likely to regulate the dynamic properties of nucleosomes are considered.

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