Diatoms in surface sediments of the Gotland Basin in the Baltic Sea

1993 ◽  
pp. 235-242
Author(s):  
Tuulikki Grönlund
Keyword(s):  
Baltic Sea ◽  
Surface Sediments ◽  
The Baltic Sea ◽  
Gotland Basin ◽  
The Baltic

Diatoms in surface sediments of the Gotland Basin in the Baltic Sea

Hydrobiologia ◽  
1993 ◽  
Vol 269-270 (1) ◽  
pp. 235-242 ◽  
Author(s):  
Tuulikki Gr�nlund
Keyword(s):  
Baltic Sea ◽  
Surface Sediments ◽  
The Baltic Sea ◽  
Gotland Basin ◽  
The Baltic

scholarly journals Distribution and bioavailability of mercury in the surface sediments of the Baltic Sea

2021 ◽  
Author(s):  
Urszula Kwasigroch ◽  
Magdalena Bełdowska ◽  
Agnieszka Jędruch ◽  
Katarzyna Łukawska-Matuszewska
Keyword(s):  
Baltic Sea ◽  
North Sea ◽  
Surface Sediments ◽  
The Baltic Sea ◽  
Gotland Basin ◽  
The North ◽  
The North Sea ◽  
Arkona Basin ◽  
The Baltic ◽  
The Impact

AbstractThe study aimed to determine the level of mercury (Hg) and its labile and stable forms in the surface sediments of the Baltic Sea. The work considers the impact of current and historical sources of Hg on sediment pollution, together with the influence of different environmental parameters, including water inflows from the North Sea. Surface sediments (top 5 cm) were collected in 2016–2017 at 91 stations located in different areas of the Baltic Sea, including Belt Sea, Arkona Basin, Bornholm Basin, Gdańsk Basin, West Gotland Basin, East Gotland Basin, and the Bothnian Sea. Besides, the particulate matter suspended in the surface and near-bottom water was also collected. The analysis of total Hg concentration and individual Hg forms in collected samples was carried out using a 5-step thermodesorption method. This method allows for the identification of three labile and thus biologically available, fractions of Hg, which are mercury halides, organic Hg, mercury oxide and sulphate. Two stable fractions, mercury sulphide and residual Hg, were also determined. The highest Hg concentrations, reaching 341 ng g−1, were measured in the highly industrialised Kiel Bay, which was additionally a munition dumping site during and after World War II. High Hg level, ranging from 228 to 255 ng g−1, was also recorded in the surface sediments of the Arkona Basin, which was a result of the cumulative effect of several factors, such as deposition of Hg-rich riverine matter, favourable hydrodynamic conditions and military activities in the past. The relatively elevated Hg concentrations, varying from 60 to 264 ng g−1, were found in the Gdańsk Basin, a region under strong anthropopressure and dominated by soft sediments. The sum of labile Hg in sediments was high and averaged 67% (with the domination of organic Hg compounds), which means that a large part of Hg can be released to the water column. It was found that the water inflows from the North Sea intensify the remobilisation of Hg and its transformation into bioavailable labile forms. As a consequence, the load of Hg introduced into the trophic chain can increase. Despite the significant reduction of Hg emission into the Baltic in the last decades, surface sediments can be an important secondary Hg source in the marine ecosystem. This is especially dangerous in the case of the western Baltic Sea.

Temporal and spatial sedimentation rate variabilities in the eastern Gotland Basin, the Baltic Sea

Boreas ◽  
2002 ◽  
Vol 31 (1) ◽  
pp. 65-74 ◽  
Author(s):  
Christian Christiansen ◽  
Helmar Kunzendorf ◽  
Kay-Christian Emeis ◽  
Rudolf Endler ◽  
Ulrich Struck ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Sedimentation Rate ◽  
The Baltic Sea ◽  
Gotland Basin ◽  
Temporal And Spatial ◽  
The Baltic

Temporal and spatial sedimentation rate variabilities in the eastern Gotland Basin, the Baltic Sea

Boreas ◽  
2008 ◽  
Vol 31 (1) ◽  
pp. 65-74 ◽  
Author(s):  
CHRISTIAN CHRISTIANSEN ◽  
HELMAR KUNZENDORF ◽  
KAY-CHRISTIAN EMEIS ◽  
RUDOLF ENDLER ◽  
ULRICH STRUCK ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Sedimentation Rate ◽  
The Baltic Sea ◽  
Gotland Basin ◽  
Temporal And Spatial ◽  
The Baltic

Holocene history of the Baltic Sea as a background for assessing records of human impact in the sediments of the Gotland Basin

The Holocene ◽  
2000 ◽  
Vol 10 (6) ◽  
pp. 687-702 ◽  
Author(s):  
Elinor Andrén ◽  
Thomas Andrén ◽  
Helmar Kunzendorf
Keyword(s):  
Baltic Sea ◽  
Human Impact ◽  
The Baltic Sea ◽  
Gotland Basin ◽  
History Of ◽  
The Baltic

scholarly journals Total petroleum hydrocarbons in surface sediments of the Lithuanian coastal area of the Baltic Sea

Baltica ◽  
2014 ◽  
Vol 27 (special) ◽  
pp. 23-30 ◽  
Author(s):  
Sergej Suzdalev ◽  
Saulius Gulbinskas
Keyword(s):  
Baltic Sea ◽  
Petroleum Hydrocarbons ◽  
Surface Sediments ◽  
Extreme Values ◽  
Hazardous Substances ◽  
Total Petroleum Hydrocarbons ◽  
The Baltic Sea ◽  
Near Shore ◽  
Marine Lagoon ◽  
The Baltic

Operation of large oil import/export terminals and intensive shipping activities together with input of hazardous substances from terrestrial runoff and constantly developing cities makes the Lithuanian part of the Baltic Sea especially sensitive to contamination with oil products. The paper presents an overview of total petroleum hydrocarbons (TPH) distribution in surface sediments at the Lithuanian near shore and within the Klaipėda State Seaport area – transitional marine-lagoon system. The study is based on the results of examination of surface sediment samples carried out in 2010–2012. The variations of TPH content in bottom sediments are explained by differences in grain size and the genesis of the investigated sediments as well as the degree of organic material decomposition. Extreme values obtained in the Klaipėda Strait area indicate presence of additional TPH contamination sources possibly of anthropogenic origin.

Particulate organic carbon (POC) in surface sediments of the Baltic Sea

2010 ◽  
Vol 31 (3) ◽  
pp. 175-188 ◽  
Author(s):  
Thomas Leipe ◽  
Franz Tauber ◽  
Henry Vallius ◽  
Joonas Virtasalo ◽  
Szymon Uścinowicz ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Baltic Sea ◽  
Particulate Organic Carbon ◽  
Surface Sediments ◽  
The Baltic Sea ◽  
The Baltic

Physical and chemical variability of the Baltic Sea: a joint experiment in the Gotland Basin

1984 ◽  
Vol 3 (3) ◽  
pp. 291-310 ◽  
Author(s):  
A. Aitsam ◽  
H.P. Hansen ◽  
J. Elken ◽  
M. Kahru ◽  
J. Laanemets ◽  
...  
Keyword(s):  
Baltic Sea ◽  
The Baltic Sea ◽  
Gotland Basin ◽  
Chemical Variability ◽  
The Baltic ◽  
Physical And Chemical ◽  
Joint Experiment
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