scholarly journals Deep impact? Is mercury in dab (Limanda limanda) a marker for dumped munition? Results from munition dump site Kolberger Heide (Baltic Sea)

2021 ◽  
Vol 193 (12) ◽  
Author(s):  
Ulrike Kammann ◽  
Marc-Oliver Aust ◽  
Maike Siegmund ◽  
Nicole Schmidt ◽  
Katharina Straumer ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Marine Biota ◽  
Reference Sites ◽  
The Baltic Sea ◽  
Dump Site ◽  
Deep Impact ◽  
Age Dependent ◽  
The Common ◽  
Harmful Substances ◽  
The Baltic

AbstractDumped munitions contain various harmful substances which can affect marine biota like fish. One of them is mercury (Hg), included in the common explosive primer Hg fulminate. There is still a lack of knowledge whether dumped munitions impact the Hg concentrations in the Baltic Sea environment. This study aims to answer the question if dab caught at the dump site Kolberger Heide show higher Hg concentrations released from munition sources and whether Hg in fish is a usable marker for munition exposure. Therefore, a total of 251 individual dab (Limanda limanda) were analysed including 99 fish from the dump site. In fish from the Kolberger Heide, no elevated Hg concentrations were found compared to reference sites when age-dependent bioaccumulation of mercury was considered. Therefore we conclude that Hg in fish is no suitable indicator for exposure to munition dumping, e.g. in the frame of possible future monitoring studies as Hg exposure originating from dumped munition is only a small contributor to overall Hg exposure of fish.

scholarly journals ITERATIVE REFINEMENT FOR UNDERWATER 3D RECONSTRUCTION: APPLICATION TO DISPOSED UNDERWATER MUNITIONS IN THE BALTIC SEA

2019 ◽  
Vol XLII-2/W10 ◽  
pp. 181-187 ◽  
Author(s):  
Y. Song ◽  
K. Köser ◽  
T. Kwasnitschka ◽  
R. Koch
Keyword(s):  
3D Reconstruction ◽  
Baltic Sea ◽  
Rapid Development ◽  
Depth Map ◽  
Ground Truth ◽  
Iterative Refinement ◽  
Underwater Imaging ◽  
The Baltic Sea ◽  
Dump Site ◽  
The Baltic

<p><strong>Abstract.</strong> With the rapid development and availability of underwater imaging technologies, underwater visual recording is widely used for a variety of tasks. However, quantitative imaging and photogrammetry in the underwater case has a lot of challenges (strong geometry distortion and radiometry issues) that limit the traditional photogrammetric workflow in underwater applications. This paper presents an iterative refinement approach to cope with refraction induced distortion while building on top of a standard photogrammetry pipeline. The approach uses approximate geometry to compensate for water refraction effects in images and then brings the new images into the next iteration of 3D reconstruction until the update of resulting depth maps becomes neglectable. Afterwards, the corrected depth map can also be used to compensate the attenuation effect in order to get a more realistic color for the 3D model. To verify the geometry improvement of the proposed approach, a set of images with air-water refraction effect were rendered from a ground truth model and the iterative refinement approach was applied to improve the 3D reconstruction. At the end, this paper also shows its application results for 3D reconstruction of a dump site for underwater munition in the Baltic Sea for which a visual monitoring approach is desired.</p>

Dispersion of Passive Tracers in the Baltic Sea Deep Water as Applied to Dumped Chemical Weapons

2012 ◽  
Vol 46 (1) ◽  
pp. 37-50 ◽  
Author(s):  
Victor Zhurbas ◽  
Vadim Paka
Keyword(s):  
Baltic Sea ◽  
Chemical Warfare Agents ◽  
Chemical Weapons ◽  
The Baltic Sea ◽  
Dump Site ◽  
Continuous Release ◽  
Sediment Redistribution ◽  
Warfare Agents ◽  
Passive Tracers ◽  
The Baltic

AbstractResults of modeling of the migration of chemical warfare agents (CWAs) and their decay products from the initial chemical weapons dump site are presented. The aim was to find idealized sediment redistribution schemes in deep basins of the Baltic Sea corresponding to different wind conditions and to model the concentration of dissolved CWA in a continuous release scenario in the Bornholm dump site corresponding to real wind statistics.

scholarly journals Fine scale population structure linked to neutral divergence in the common sole (Solea solea), a marine fish with high dispersal capacity

2019 ◽  
Author(s):  
Alan Le Moan ◽  
Belén Jiménez-Mena ◽  
Dorte Bekkevold ◽  
Jakob Hemmer-Hansen
Keyword(s):  
Baltic Sea ◽  
Transition Zone ◽  
Structured Populations ◽  
Fine Scale ◽  
The Baltic Sea ◽  
Evolutionary Processes ◽  
Solea Solea ◽  
The Common ◽  
The Baltic ◽  
Common Sole

AbstractThe Baltic Sea provides a classical example of how an environmental gradient is associated with the distribution of marine species. Here, numerous genetic studies have revealed clear patterns of population structuring linked to the physical features of the gradient itself. Nevertheless, it remains difficult to distinguish clearly between the different micro-evolutionary processes that shape these structured populationsin situ. The common sole (Solea solea) is a benthic flatfish that rarely occurs within the Baltic Sea, but that exhibits a clear genetic break between populations from the North Sea – Baltic Sea transition zone and the remainder of the Atlantic Ocean. Here, we aim to evaluate the extent to which natural selection is involved in the observed patterns of divergence of sole populations occurring in the transition zone by comparing them with population structures of other flatfish species that have successfully colonized the Baltic Sea. By using several thousand of ddRAD-derived SNPs, we identified a fine-scale pattern of isolation-by-distance (IBD) of sole populations in the region. However, despite strong biological similarities among the flatfishes compared here, the sole IBD was, by far, the lowest detected across the transition zone. While selection was inferred to strongly influence all other flatfishes evolutionary histories, the analytical inference on the sole demographic history suggests that this fine-scale IBD is mainly maintained by neutral processes due to low effective population size of sole in the transition zone and asymmetrical gene flow. Our work contributes to a growing body of evidence suggesting that the strength of the different micro-evolutionary processes is species-specific, even when species occur in the same environment.

Clause-final negative particles in varieties of Swedish

2021 ◽  
Author(s):  
Henrik Rosenkvist
Keyword(s):  
Baltic Sea ◽  
Middle Ages ◽  
Geographic Distribution ◽  
Final Section ◽  
The Baltic Sea ◽  
Late Middle Ages ◽  
External Position ◽  
The Common ◽  
The Baltic ◽  
Internal Particle

Abstract While the Swedish negator inte may be doubled in a final clause-external position, in both standard Swedish and dialects, many dialects also allow a final, clause-internal particle (e, i or ai) in negated clauses. FNPs occur in a coherent area around the Baltic Sea, and in contrast with doubling negation, they are possible both after both inte and aldrig ‘never’. FNPs are also used in questions and exclamations, contexts that disallow doubling negation. These particles may have developed from the former Swedish negator ej or from the common inte. An argument for the former alternative is that other dialectal phenomena that spread from central Sweden during the late Middle Ages have approximately the same geographic distribution. In the final section of the paper, some typological consequences and implications are discussed. Furthermore, it is argued that syntactic studies of non-standard varieties may reveal new insights of typological relevance.

Assessing the risk of a 50-year-old dump site in the Baltic Sea by combining chemical analysis, bioaccumulation, and ecotoxicity

2013 ◽  
Vol 13 (7) ◽  
pp. 1270-1283 ◽  
Author(s):  
Gladys A. Liehr ◽  
Susanne Heise ◽  
Wolfgang Ahlf ◽  
Kristen Offermann ◽  
Gesine Witt
Keyword(s):  
Chemical Analysis ◽  
Baltic Sea ◽  
The Baltic Sea ◽  
Dump Site ◽  
The Baltic

scholarly journals Sustainable development solutions and complex it means for evaluation of water pollution processes

2019 ◽  
Author(s):  
Dalė Dzemydienė
Keyword(s):  
Water Pollution ◽  
Baltic Sea ◽  
Public Administration ◽  
Layered System ◽  
Common Goal ◽  
The Baltic Sea ◽  
Wastewater Pollution ◽  
The Common ◽  
The Baltic ◽  
Practical Implications

The purpose of this research is the developing of decision support system (DSS) by integrating all working information systems (ISS) for wastewater pollution evaluation processes by contributing in achieving the common goal of the Helsinki Convention (HELCOM) for countries to preserve and restore the ecosystems of the Baltic Sea. Research methodology based on design approach for the development of DSS as a multi-layered system with the multi–componential, interoperable structure of databases (DBs), data warehouses, and IS, which are under the responsibility of different public administration institutions. Findings – presented results on integration of information sources and collaboration workflows help in searching of suitable indicators for revealing the situations of water pollution from wastewater bodies and objects in districts of Lithuania and the effluxes in the Baltic Sea. Research limitations – the complexity of pollution processes and the multi-layered structure of distributed ISs under different responsibilities identify problems and requirements for adequate DSS working online. Practical implications – the results will help for influencing the decisions provided for responsible institutions of Lithuania and other members of the HELCOM, responsible for the protection of the marine environment of the Baltic Sea. Originality/Value intend to assess the sustainability requirements in the wastewater sector, by providing integrated collaboration of ISs.

scholarly journals CLUSTER APPROACH IN ORGANIZATION OF TRANSPORTATION IN THE BALTIC SEA REGION

Transport ◽  
2015 ◽  
Vol 32 (2) ◽  
pp. 167-179 ◽  
Author(s):  
Olga Nežerenko ◽  
Ott Koppel ◽  
Tarmo Tuisk
Keyword(s):  
Baltic Sea ◽  
Hierarchical Cluster ◽  
Transport Systems ◽  
Cluster Approach ◽  
The Baltic Sea ◽  
Cross Border ◽  
Baltic Sea Region ◽  
The Common ◽  
And Performance ◽  
The Baltic

The urgency of the issues discussed in this paper stems from the fact that cross-border collaboration is an essential part of commercial transportation today. With the extension of multimodal transportation concept, the efficiency and performance of not only national but also of regional transport systems depend on a synergy which occurs as a result of cooperation between transport enterprises and different modes of transport. The present study analyses the situation of transportation field in the Baltic Sea Region (BSR) in the period 2004–2011. The methodology used is based on Hierarchical Cluster Analysis (HCA), correlation analysis, Bayesian analysis and affinity analysis, which help to identify countries with similar trends in the field of transportation and the common reasons and factors which have led to the emergence of these clusters.

Karyology of Pomatoschistus Microps (Teleostei: Gobioidei)

1986 ◽  
Vol 66 (1) ◽  
pp. 259-266 ◽  
Author(s):  
C. J. Webb
Keyword(s):  
Salt Marsh ◽  
Baltic Sea ◽  
Environmental Heterogeneity ◽  
The Other ◽  
The Baltic Sea ◽  
Gobiid Fish ◽  
The Common ◽  
The Mediterranean ◽  
The Baltic ◽  
Common Goby

The common goby, Pomatoschistus microps (Krøyer), is a small, euryhaline gobiid fish which ranges along the coasts of continental Europe from the Mediterranean to Trondheim, Norway, and also penetrates into the Baltic Sea (Miller, 1973). This species, which can be very abundant, is generally distributed in estuaries, salt marsh and shore pools (Wheeler, 1969; Miller, 1971) and experiences a higher degree of environmental heterogeneity than most of the other European gobiids (Wallis & Beardmore, 1984a).

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