Plant communities with Arenaria pseudofrigida (Ostenf. et Dahl) Juz. ex Schischk. on islands of the south-eastern part of Barents Sea

2013 ◽  
pp. 78-85 ◽  
Author(s):  
N. V. Matveyeva ◽  
O. V. Lavrinenko ◽  
I. A. Lavrinenko
Keyword(s):  
Plant Communities ◽  
Barents Sea ◽  
The South ◽  
South Eastern ◽  
The Barents Sea ◽  
Marine Terraces

The plant communities with Arenaria pseudofrigida are common on the cobble-loam grounds on the edges of marine terraces on the Vaigach, Dolgiy and few smaller islands in the south-eastern part of the Barents Sea. These communities influenced by sea salty spray are described within 4 new synataxa (2 associations and 2 subassociations). They are provisionally placed within the alliance Arenarion norvegicae Nordh. 1935. order Thlaspietalia rotundifolii Br.-Bl. in Br.-Bl. et Jenny 1926, class Thlaspietea rotundifolii Br.-Bl. 1948.

scholarly journals The plant communities of classes Hydrochari-lemnetea Oberd. 1967 and Potametea tx. Et Prsg. 1942 of the Labudovo okno locality (Serbia)

2008 ◽  
pp. 101-107
Author(s):  
Dubravka Polic ◽  
Ruzica Igic ◽  
Slobodanka Stojanovic ◽  
Dejana Lazic
Keyword(s):  
Plant Communities ◽  
Hydroelectric Power Station ◽  
Left Bank ◽  
Hydroelectric Power ◽  
The South ◽  
Power Station ◽  
South Eastern ◽  
Dam Building

Labudovo okno locality (50 m-84 m elevation) is situated in the south-eastern part of the edge of the Pannonian Plains, resting along the left bank of the Danube between 1982 km and 1078 km. The investigated locality is the result of rise of the Danube level after dam building of the hydroelectric power station Djerdap I. The vegetation comprises aquatic associations of the classes Hydrochari-Lemnetea Oberd. 1967 and Potametea Tx. et Prsg. 1942. The class Hydrochari-Lemnetea Oberd. 1967 includes the following phytocoenoses: Lemno-Spirodeletum W. Koch 1954, Salvinio-Spirodeletum polyrrhizae Slavnic 1956, Lemno minoris-Azolletum filiculoides Br.-Bl. 1952, Ceratophylletum demersi (So? 27) Hild 1956. The class Potametea Tx. et Prsg. 1942 includes the associations Myriophyllo-Potametum So? 1934, Nympaeetum albo-luteae Nowinski 1928, Trapetum natantis M?lleret G?rs 1960.

Holocene climatic and palaeoenvironmental changes in the South-Eastern Barents Sea – new insights from palaeomagnetic and geochemical stratigraphy

2020 ◽  
Author(s):  
Martin Klug ◽  
Karl Fabian ◽  
Jochen Knies ◽  
Valérie Bellec ◽  
Leif Rise
Keyword(s):  
North Atlantic ◽  
Remanent Magnetization ◽  
Late Holocene ◽  
Environmental Changes ◽  
Barents Sea ◽  
Marine Ecosystem ◽  
Planetary Science ◽  
Coastal Current ◽  
The South ◽  
South Eastern

<p>Holocene climate variability and environmental changes have been studied using a sediment record from the Barents Sea with focus on the spatio-temporal evolution of bio-productivity and terrestrial sediment deposition in response to changes of climate and regional oceanography. From a 3 m long sediment core recovered in the South-Eastern Barents Sea at 72.5°N 32.5°E u-channels were extracted and stepwise demagnetized and measured for their natural remanent magnetization (NRM) and anhysteretic remanent magnetization (ARM) at the cryogenic magnetometer facility at the Geological Survey of Norway. The u-channel measurements at 3 mm resolution allow the reconstruction of palaeoinclination, relative declination and relative palaeointensity. Comparison of these parameters to FENNOSTACK (Snowball et al., 2007) and EGLACOM-SVAIS (Sagnotti et al., 2011) establishes a robust age model for the sediment sequence which otherwise contains little datable material. We applied statistical factor analysis as centred logratio (clr) transformation to reduce dimensionality of the XRF data and compare changes in high-resolution magnetic susceptibility, wet bulk density and XRF elemental composition with changes of climate proxies in other North Atlantic sedimentary records.</p><p>Based on the new chronostratigraphic framework changes of inorganic and organic proxies at long-term and sub-millennial scale resolve the temperature variability throughout the Holocene. Calcium content changes are related to regional bio-productivity changes in response to surface temperature changes with a pronounced deterioration at the beginning of the Neoglaciation and gradual enhancement during the late Holocene. Besides palaeoclimatic responses, the results offer the opportunity to study sediment transport and deposition during the regional deglaciation and mid-Holocene glacier growth in northwestern Fennoscandia. The temporal changes of the regional oceanography and the variability of marine palaeoproductivity in the South-Eastern Barents Sea indicate an active interplay between the North Atlantic Current (NAC) and the Norwegian Coastal Current (NCC) during the early Holocene, a predominance of the NCC during middle Holocene and a re-amplification of the NAC during the late Holocene. Comparison to other records from the Nordic Seas enables the reconstruction of responses and the vulnerability of this arctic marine ecosystem to past climate variations and may help to estimate upcoming responses to recent and future climate changes.</p><p> </p><p>References:</p><p>Snowball, I., L. Zillén, A. Ojala, T. Saarinen, and P. Sandgren (2007), FENNOSTACK and FENNORPIS: Varve dated Holocene palaeomagnetic secular variation and relative palaeointensity stacks for Fennoscandia, Earth and Planetary Science Letters, 255, (1-2), 106–116</p><p>Sagnotti, L., P. Macrì, R. Lucchi, M. Rebesco, and A. Camerlenghi (2011), A Holocene paleosecular variation record from the northwestern Barents Sea continental margin, Geochemistry, Geophysics, Geosystems, 12, (11)</p>

scholarly journals Stubble field plant communities of the Mazowiecki Landscape Park

2012 ◽  
Vol 63 (2) ◽  
pp. 189-205
Author(s):  
Teresa Skrajna ◽  
Maria Ługowska
Keyword(s):  
Plant Communities ◽  
Buffer Zone ◽  
The South ◽  
South Eastern ◽  
Field Plant

The characteristics of communities found in unploughed stubble fields of the Mazowiecki Landscape Park and its agricultural buffer zone are presented in the paper. The association <i>Echinochloo-Setarietum</i> divided into a typical variant, the variant with <i>Galinsoga parviflora</i>, and the variant with <i>Bidens tripartite</i>, was the most frequently noted and floristically differentiated association. Patches of <i>Digitarietum ischaemi</i> were also frequently observed in stubble fields on the poorest habitats. Rarely, on fertile soils, small patches of floristically rich communities with <i>Veronica agrestis</i> were recorded. Periodically, excessively wet habitats were seldom occupied by the speciesrichest phytocoenoses of <i>Centunculo-Anthoceretum punctati</i>. Single patches of the community with <i>Setaria pumila</i>, the form with <i>Aphanes arvensis</i>, were observed only in the south-eastern part of the Park.

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