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Stages of the Baltic Sea evolution in the geochemical record and radiocarbon dating of sediment cores from the Arkona Basin

100%

Kostecki R.

Oceanological and Hydrobiological Studies

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2014

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tom 43

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nr 3

2

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Alexandrium minutum cysts in sediment cores from the Eastern Harbour of Alexandria, Egypt

100%

Ismael A. A., Khadr A. M.

Oceanologia

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2003

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tom 45

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nr 4

Alexandrium minutum cysts were studied in sediment cores from its type locality, the Eastern Harbour of Alexandria, following the disappearance of the species from the plankton since 1994. Three cores were sampled in the summer of 1999 along the north-south axis of the harbour. The sediments were subjected to grain size analysis and their organic carbon content was determined. The sediments consisted of medium, coarse and very coarse sand. Grain size and organic carbon content were negatively and significantly correlated in core 1 but followed a parallel trend in cores 2 and 3. Seven dinoflagellate cysts, representing 6 genera were identified from the cores. Their relative abundance showed a remarkable difference. A. minutum cysts contributed a maximum of 17.4% to the total cysts. The distribution profile of A. minutum cysts in the cores reflects the bloom duration but not its productivity. The cyst distribution in the cores is the resultant of two opposite processes, the sedimentation rate and the continuous erosion of the bottom sediments, which is not related to sediment texture.

3

Spatial and temporal distribution of heavy metals in coastal core sediments from the Red Sea, Saudi Arabia

84%

Al-Mur B. A., Quicksall A. N., Al-Ansari A. M. A.

Oceanologia

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2017

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tom 59

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nr 3

Jeddah is the most industrialized city on the west coast of Saudi Arabia and is under increasing influence of human activities. Heavy metals data were obtained from four near-coast Red Sea sediment cores in close proximity to Jeddah. Chromium, manganese, iron, copper, zinc, and lead were analyzed from depth-resolved sections of each core via heavy acid digestion and inductively coupled plasma-mass spectrometry (ICP-MS). The average concentrations of all four sites were 245.96 mg kg1, 478.45 mg kg1, 8506.13 mg kg1, 251.82 mg kg1, 623.09 mg kg1, and 362.75 mg kg1, respectively. The depth-resolved results showed that highest concentrations of Mn, Cu, and Pb were found in the top 15 cm of the core profile distributions compared to other depth sub-samples. Heavy metal concentrations in core sediments are increased near central Jeddah and have become higher in recent years. The results of enrichment factor calculations indicate little anthropogenic supply of Mn and Cr while Pb, Zn, and Cu show strong anthropogenic input. The Pollution Load Index was higher in the two sites closer to central Jeddah where power and desalination plants and wastewater release are known. This indicates that the area has suffered from heavy metal pollution compared to other non-industrialized sites in the Red Sea. Heavy metal contaminations due to anthropogenic activity should be taken into account to protect the Red Sea during future growth. The results of this work should be considered as a baseline for heavy metals monitoring in the sediments of the Red Sea coast near Jeddah, Saudi Arabia.

4

Testate amoebae as proxy for water level changes in a brackish tidal marsh

84%

Ooms M., Beyens L., Temmerman S.

Acta Protozoologica

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2012

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tom 51

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nr 3

5

Chemical forms and distribution of heavy metals in core sediments from the Gdansk Basin, Baltic Sea

67%

Belzunce S. M. J., Szefer P., Wilson M. J., Bacon J., Bolalek J.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 4

505-515

Short sediment cores (30 cm length) were taken along a transect of the Gdansk Basin from the mouth of the Vistula River out into the Baltic Sea in June 1996. The chemistry and mineralogy of surficial and buried sediments were determined and Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn were analyzed in total and in fractions using a sequential extraction procedure. The bulk and clay mineralogy of the sediments were determined by XRD and SEM. The concentrations of some of the trace metals in sediments are above pre-anthropogenic background. In particular, the surficial samples are substantially enriched in Cu, Pb and Zn, suggesting an anthropogenic origin. The concentrations of Cu, Pb and Zn range from 21-71 ^g-g"1, 56-210 ^g-g"1 and 21-83 ^g-g-1, respectively. Unexpectedly, the concentrations of trace metals increase seawards within the Gdańsk Basin. The forms of binding are different for each metal. Cobalt, Cr and Fe are mainly associated with the residual mineral fraction of the sediment, although in samples with high Fe concentrations there is a significant correlation with organic compounds. In contrast, Mn, Ni, Pb and Zn are predominantly associated with oxides and the organic fractions, with a significant percentage associated with the carbonate and exchangeable cation fractions, whilst Cu is mainly bound with the organic fraction.

6

Holocene evolution of the Pomeranian Bay environment, Southern Baltic Sea

67%

Kostecki R., Janczak-Kostecka B.

Oceanologia

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2011

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tom 53

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nr (1-TI)

This article focuses on the diatom assemblages and geochemical composition of sediment cores retrieved from the Pomeranian Bay. We also discuss similarities and differences in the diatom assemblages and the palaeogeographic development of nearby regions. Our main objective was to determine the characteristics and rate of the Littorina transgression in the Pomeranian Bay area. Sediments were divided into units based on differences in the distribution of diatom ecological groups and in geochemical ratios, such as Mg/Ca, Na/K and Fe/Mn. This study identified lacustrine sediments deposited during the time of the Ancylus Lake. This lacustrine-period sedimentation took place in a shallow lake under aerobic conditions. The record of the onset of marine environment dates to 8900–8300 cal BP and corresponds to the Littorina transgression. After about 8300 cal BP, sedimentation took place in a deeper marine environment with higher biogenic production and anaerobic conditions. The abrupt appearance of marine diatom species and increased geochemical salinity indicators reflect the large impact of the Littorina transgression on the Pomeranian Bay environment.

7

Rozmieszczenie metali ciężkich, WWA i PCB w rdzeniach osadów dennych Jeziora Dąbie

67%

Protasowicki M., Niedzwiecki E., Ciemniak A., Witczak A., Meller E., Malinowski R.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2009

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tom 542

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nr 2

Badano zawartość metali, wielopierścieniowych węglowodorów aromatycznych oraz siedmiu wskaźnikowych kongenerów polichlorowanych bifenyli (PCB - 28, 52, 101, 118, 138, 153, 180) w dwóch rdzeniach osadów dennych Jeziora Dąbie. Dodatkowo oznaczono odczyn (pHKCl), straty przy wyżarzaniu w temperaturze 550°C oraz ekstrakt eterowy. Analizy wykonano za pomocą AAS, ICP-AES, GC MS oraz innych przyjętych metod. Badania wykazały, że zawartości mieściły się w następującym przedziale (min-max): rtęci - 0,100-1,695; kadmu - 0,13-8,04; ołowiu - 1,6-122,6; chromu - 70-156; cynku - 62-1325; miedzi - 14-107; niklu - 23-49 mg∙kg-1 suchej masy osadu oraz benzo(a)antracenu (BaA) - 1-923, benzo(b)fluorantenu (BbF) - 0-964, benzo(k)fluorantenu (BkF) - 0-545, benzo(a)pirenu (BaP) - 0-1171, indeno(1,2,3-c,d)pirenu (IndP) - 0-761, dibenzo(a,h)antracenu (DahA) - 0-219, benzo(ghi)perylenu (BPer) - 0-775, a sumy siedmiu kongenerów wskaźnikowych PCB - 0,23-16,77 μg∙kg-1 s.m. Generalnie, poza kilkoma wyjątkami, zawartość zanieczyszczeń w najmłodszych warstwach osadów (0-10-20 cm) była wielokrotnie wyższa niż w starszych. Stopień zanieczyszczenia osadów dennych Jeziora Dąbie nie jest duży i dotyczy głównie warstwy powierzchniowej (max. do 20 cm). Występowanie w wodach jeziora licznych gatunków flory i fauny świadczy, że pomimo przekroczenia zawartości naturalnych metali (za wyjątkiem niklu) i WWA oraz obecności PCB substancje te nie stwarzały zagrożenia dla życia hydrobiontów. W świetle przepisów polskich stężenie rtęci, kadmu, cynku oraz BaP w powierzchniowej warstwie osadów (0-10-20 cm ) wskazuje, że w razie ich wydobycia stanowiłyby one urobek zanieczyszczony.

Ograniczanie wyników

Stages of the Baltic Sea evolution in the geochemical record and radiocarbon dating of sediment cores from the Arkona Basin

Alexandrium minutum cysts in sediment cores from the Eastern Harbour of Alexandria, Egypt

Spatial and temporal distribution of heavy metals in coastal core sediments from the Red Sea, Saudi Arabia

Testate amoebae as proxy for water level changes in a brackish tidal marsh

Chemical forms and distribution of heavy metals in core sediments from the Gdansk Basin, Baltic Sea

Holocene evolution of the Pomeranian Bay environment, Southern Baltic Sea

Rozmieszczenie metali ciężkich, WWA i PCB w rdzeniach osadów dennych Jeziora Dąbie