Geo-Eco-Marina
https://journal.geoecomar.ro/geo-eco-marina
<p>Geo-Eco-Marina is an annual scientific journal, published continuously since 1996, with a year-round invitation for publication open to marine scientists and geoscientists worldwide.</p> <p>Geo-Eco-Marina publishes novel research results primarily focused on studies performed along the Danube River- Danube Delta- Black Sea (and its coastal zone) macro-geo-system. Topics cover both modern and fossil sedimentary deposits, as well as present and past geological associations.</p> <p> </p> <p><strong>ISSN: </strong>1224-6808</p>National Institute of Marine Geology and Geo-Ecology (GeoEcoMar)en-USGeo-Eco-Marina2248-2776 Celebrating 30 years of the National Research and Development Institute for Marine Geology and Geo-ecology – GeoEcoMar activity
https://journal.geoecomar.ro/geo-eco-marina/article/view/01_2023
<p>No abstract</p>Nicolae PANIN
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2023-12-182023-12-18295610.5281/zenodo.10254284 Sand deposits on the Romanian continental platform
https://journal.geoecomar.ro/geo-eco-marina/article/view/02_2023
<p>The beach nourishment is an already employed option on the littoral area of Romania, Black Sea. Quite large quantities of marine sand are necessary for implementing the program of artificial placement of sand on the eroded shore areas and for the maintenance of these works. In order to minimize the financial effort to find accumulations of marine sand on the Romanian continental shelf, in the 20-50m water depth domain, the seismoacoustic methods (multibeam echosounding, sub-bottom profiling and side scan sonar) can be successfully employed. The concurrent use of these methods can allow the mapping the most favorable areas for sand accumulations areas.</p>Gabriel IONAdrian POPAConstantin LAZARFlorin DUTU
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2023-12-182023-12-182971810.5281/zenodo.10254504 Emiliania huxleyi and Braarudosphaera bigelowii fluctuations in quaternary sediments of the western Black Sea
https://journal.geoecomar.ro/geo-eco-marina/article/view/03_2023
<p>This paper presents the fluctuation of the calcareous nannoplankton species Emiliania huxleyi and Braarudosphaera bigelowii identified in four cores sampled from the NW Black Sea, at various water depths, between 160.9 and 1.031 m. Unit 1 (Coccolith Mud) and 3 (Lacustrine Lutite) are present in all studied cores, the former showing a variable thickness. Unit 2 (Sapropel Mud) was not observed in the shallowest studied cores, i.e., above 200 m water depth. At the deepest levels of the studied cores, a red-brownish succession, composed of clays and muds, was identified. Calcareous nannoplankton assemblages in situ are present only in the youngest Holocene units 1 and 2, being composed of Emiliania huxleyi and Braarudosphaera bigelowii. These two calcareous nannoplankton species, very abundant especially in Unit 1, show a negative correlation in their abundance pattern.</p>Eliza ANTONGabriel IONAndrei BRICEAGVlad APOTROSOAEIConstantin LAZARFlorin PITEA
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2023-12-182023-12-1829192610.5281/zenodo.10254341 Characterization of Romanian Black Sea pelagic habitats based on mesozooplankton distributional pattern and proposal of a new integrative mesozooplankton index for assessing their quality status
https://journal.geoecomar.ro/geo-eco-marina/article/view/04_2023
<p>The paper presents the mesozooplankton population characteristics and distributional patterns within the coastal, transitional, and marine waters of the Romanian Black Sea shelf in August 2021. The results point out the utility of zooplankton as a biological indicator for delimiting the pelagic habitats due to its features strongly linked with the environmental variables. The assessment of water bodies’ quality based on the zooplankton indices agreed for the Black Sea according to the Water Framework Directive (2000/60/EC) and Marine Strategy Framework Directive (2008/56/EC), showed that in average 68% of indices were in GES, while the rest in non-GES. A new index, namely the Integrative Mesozooplankton Index (IMI), aiming to integrate the results of all three indices and percentage of water bodies in GES has been proposed. Three threshold classes for good, moderate and bad status have been established to delineate GES/nonGES threshold. At a threshold value of 6.6 – 9 proposed for the IMI GES, the overall quality status of the water bodies of the Romanian shelf in August 2021 did not achieve GES.</p>Mihaela MURESAN
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2023-12-182023-12-1829273810.5281/zenodo.10351039 Évaluation de la qualité microbienne de l'eau de mer et des moules d'une ferme conchylicole algérienne
https://journal.geoecomar.ro/geo-eco-marina/article/view/05_2023
<p>Seafood, particularly bivalve mollusks, are eaten raw or undercooked, making them a potential risk of food poisoning. Moreover, these animals filter water and concentrate microorganisms and toxins. This study considers the microbial quality of seawater and mussels sampled from a shellfish farm on the Algerian coast. Samples were investigated by enumeration methods for the fecal indicators and the research of pathogens such as Staphylococcus and Salmonella. Strains of interest have been characterized and then identified with API 20E test galleries following the manufacturer’s instructions. The seawater’s microbiological results revealed that the levels of fecal coliforms were lower than the allowed limit (<500 CFU/100 ml) in all the stations during the study period. However, Staphylococcus aureus and Salmonella spp. were positive in all stations. Regarding mussel samples, the results showed that they were highly contaminated by fecal coliforms (>300 CFU/100 g). Similarly to seawater’s results, we detected the presence of Staphylococcus aureus and Salmonella spp. Isolate’s identification by API 20E test galleries revealed the presence of the same species Salmonella enterica ssp Arizona in seawater and mussels’ samples. When considering the indicators and bacterial pathogens investigated, the mussels examined were of bad microbiological quality, which can threaten consumer health.</p>Nora DJAHNITHousseyn OTMANIRyhane LOUNASAmel Yasmine BEN ABD EL MOTALEBNarimane CHAMMANoureddine DJERRAMoussaab BERKANI
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2023-12-182023-12-1829395010.5281/zenodo.10350400 Microplastic characterization in Romanian coastal waters, Western Black Sea
https://journal.geoecomar.ro/geo-eco-marina/article/view/06_2023
<p>The pollution carried by the Danube is evident in coastal areas, given that the river mouths at the Black Sea shore can be considered as a significant pollution hotspots. This study focuses on microplastic (MPs) abundance and distribution in the coastal waters of the western Black Sea, with considerations regarding the source of the plastic litter. An important comparison was assessed between the Danube Delta front and adjacent areas of Romanian main harbors. A total of 6 water samples were collected from various locations, revealing an average concentration of 0.63 MPs/m3, with the highest concentration near Sf. Gheorghe (1.37 MPs/m3). Fragments and fibers were the most prevalent forms, with foils, spherules, and fiber clumps present in smaller percentages. Spectral analysis indicated that the predominant MP types were polyethylene, polypropylene, ethylene, and polyvinyl, suggesting diverse origins such as packaging materials, textile products, and fishing gear. This research emphasizes the importance of thorough monitoring and a more comprehensive approach to the negative impact at the regional scale.</p>Teodora BABOSConstantin LAZAROana DOBRECornel POPIulian POJAR
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2023-12-182023-12-1829515810.5281/zenodo.10254560 A standardized remote sensing methodology for mapping mineralogical mining waste anomalies across European countries using principal component analysis and GIS data integration
https://journal.geoecomar.ro/geo-eco-marina/article/view/07_2023
<p>This paper presents a methodology based on medium resolution satellite images (Landsat Thematic Mapper and Enhanced Thematic Mapper), adapted and further developed from a variant of a Principal Components Analysis used for geological exploration, which took into consideration the spectral bands in the visible and infrared wavelengths where the minerals of interest exhibited diagnostic features. The method was developed to be applied for an inventory of mining wastes at pan-European scale and was successfully tested in known mining regions with closed exploitations in Upper Silesia (Poland), Romania and Slovakia. The results were validated against European (CORINE Land Cover) and national data sets. A Mining Anomaly Index was computed at catchment scale, to determine the most vulnerable river basins from which pollutants from the extractive industry could be further transported to the seas. In view of the present increased demand for metals and critical raw materials, the principles of the described methodology could be applied to the new satellite sensors, with increased ground and spectral resolution.</p>Anca Marina VIJDEAStefan SOMMER
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2023-12-182023-12-1829598210.5281/zenodo.10254736 Morphology and taxonomy of three Cytheridella species (Ostracoda, Timiriaseviinae, Cytheridellini) from Western Amazonia
https://journal.geoecomar.ro/geo-eco-marina/article/view/08_2023
<p>The description of Cytheridella ilosvayi Daday, 1905 is reviewed and new information on the morphology of the valves is presented. Traits belonging to the areas of the dorsal and antero- and postero-ventral margins of the valves are described for the first time and a novel method to evaluate the degree of inclination of the valve’s dorsal margin is proposed. The data are further used for reviewing the taxonomic validity of the fossil (Neogene) C. danielopoli Purper, 1979, occurring in Western Amazonia. It is documented that the C. danielopoli described by Purper (1979) is closely related to C. ilosvayi. specimens presented by Gross et al. (2013), considered initially as variants of C. danielopoli Purper represent a new taxon, C. martingrossi Danielopol and Piller, n. sp. The information we offer are premises for an extended study we intend to complete on the morphology and systematics of Cytheridella species.</p>Dan L. DANIELOPOLMartin GROSSWerner E. PILLER
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2023-12-192023-12-19298311010.5281/zenodo.10350901 Structural styles in the Nankai accretionary prism's outer unit. An insight into the deformation mechanisms of a young fold and thrust belt
https://journal.geoecomar.ro/geo-eco-marina/article/view/09_2023
<p>In this paper we intend to reveal the architecture and structural styles in the outer unit of the Nankai accretionary prism, using a 672 km2 seismic survey that was acquired by the Japanese Government in 2006 in order to infer the origins of some major tsunamigenic earthquakes. Understanding deformation mechanisms and the distribution and morphology of the thrust sheets and faults is essential for the oil and gas industry and for academic study as well, as scientists intend to prevent the impact of devastating hazards that appear often in active tectonic settings, such as subduction zones.</p>Calin Constantin NITAIoan MUNTEANU
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2023-12-192023-12-192911111610.5281/zenodo.10254857 Methods used to adapt FAIR principles to scientific data
https://journal.geoecomar.ro/geo-eco-marina/article/view/10_2023
<p>This paper presents an analysis of the FAIR principles. It is addressed to data managers and scientists (as data producers and users) and aims to point out the crucial importance of providing proper metadata and take all the necessary actions in order for the databases to follow the FAIR principles.</p>Cristian CUDALBUTeodora BABOSFlorin PITEA
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2023-12-192023-12-192911712410.5281/zenodo.10254901 Applications of remote sensing in lithological mapping of east Gabal Atud area, central eastern desert, Egypt
https://journal.geoecomar.ro/geo-eco-marina/article/view/11_2023
<p>The east of Gabal Atud area is covered by a variety of Precambrian basement rocks including Atud Formation, Atud tectonized mélange, metavolcanics, and serpentinites-talc-carbonates. These rocks were later intruded by the island arc metagabbro- diorite complex which in turn is invaded by some dykes. Operational Land Imager (OLI) and Sentinel-2A were applied for the first time for lithological discrimination of the exposed rock units in the east of Gabal Atud area. Five image enhancement techniques are applied including optimum index factor, false color composites, band rationing, principal component analysis, and minimum noise fraction for the interpretation of OLI and Sentinel-2A datasets. The integrated image-processing techniques allow the effective lithological discrimination of the east of Gabal Atud area, Central Eastern Desert, Egypt. The acid metavolcanics have been effectively discriminated from basic metavolcanics and serpentinites through FCC S2 b12-b11-b1, OLI PCA b4 -b3-b2, S2 PCA b5-b2-b3, and OLI band ratio (b4/b2, b6/b7, b4/b6). The sandstone facies highlight the fantastic (folding and faulting) structures of the Atud Formation on OLI and S2 images including OLI PCA of b1-b2-b3, S2 PCA of (b2), and S2 PCA of b5-b2-b3. Conglomerate facies can be differentiated from diamictite facies using the band ratio of the S2 (b7/b12). Although, the serpentinites and diamictite have different lithological compositions, they show similar colors in some OLI and S2 images (e.g. OLI PCA b1-b2-b3, S2 PCA b2) but they can be discriminated using other OLI and S2 techniques as OLI PCA b4-b2-b1, S2 PCA b5-b2-b3, and band ratio applications (e.g. OLI b6/b7 and OLI (b6/b7, b5/b6, b4/b2)).</p>Maher DAWOUDIbrahim M. KHALAFHanaa A. EL- DOKOUNYAli SHEBLHamdy A. EL-DESOUKYAbdelhalim Sh. MAHMOUDMai A. EL-LITHY
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2023-12-192023-12-192912514610.5281/zenodo.10254865 Upper Eocene - Lower Oligocene stratigraphic plays in the Caswell sub-basin, Browse Basin (Australia)
https://journal.geoecomar.ro/geo-eco-marina/article/view/12_2023
<p>The Browse Basin, now part of Australia`s North West Shelf passive margin, was formed through six major tectonic events, from the Paleozoic to the Miocene, and is a gas and condensate rich province in north-west Australia. In this study we focused on Eocene-Oligocene stratigraphic plays in order to extend the basin`s resources by proposing new prospects that could include reservoirs with both liquid and gaseous hydrocarbons. Lithologic descriptions from wells, structural and depth maps, along with seismic attributes (GSD and RMS Amplitude), were integrated to create a sedimentological model for the of the Prion Fm. We highlighted the fact that the distal zones of the upper part of the Upper Eocene – Lower Oligocene sequence host multiple individual, disconnected, submarine fan systems that create the proper framework for the exploration activity. An interesting prospect was proposed in this project, one that might yield recoverable resources of around 31 MMbbl of oil and 236 BCF of gas (solution gas and free gas cumulated) (Pmean values for estimates). This is an attempt to unlock oil reserves that currently lack throughout the region.</p>Calin Constantin NITAIzabela MARISIoan MUNTEANUConstantin LAZAR
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2023-12-192023-12-192914715810.5281/zenodo.10254816A new method for measuring meander parameters. The lower Jiu river case study, Romania
https://journal.geoecomar.ro/geo-eco-marina/article/view/13_2023
<p>The study of river channel dynamics at different time intervals is an element of interest in river geomorphology because it provides qualitative and quantitative information related to the river style and patterns of evolution. Old maps represent archives of extremely valuable information related to the natural and human environment, which provide the necessary data for such studies. This paper uses data from old maps to analyze the evolution of the Jiu River between 1857 and 2021. A new method for measuring meander parameters has been developed and may be applied to any type of river channel. The calculation and analysis of the parameters (sinuosity coefficient, length, amplitude, type, and shape) for each riverbed section led to the identification of distinct evolutionary patterns which were discussed in relation to control factors. We concluded that the Jiu river channel gradually straightened during the last 164 years due to upstream anthropogenic interventions such as dams and hydrotechnical works which reduced the natural riverbed dynamics</p> <p>reflected in low sinuosity and meandering levels.</p>Alexandra RIZACAndrei TOMASabin ROTARUAlbert SCRIECIU
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2023-12-192023-12-192915916810.5281/zenodo.7494734 Use of globally available data for determining water level variation in lakes: the case study of Lake Turkana, Kenya
https://journal.geoecomar.ro/geo-eco-marina/article/view/14_2023
<p>This study identifies relevant globally available data to develop basin and water level variation models which can be used for scenario modelling. The case study for the current research is Lake Turkana in Kenya, which is the outlet of 3 main river basins: Omo, Turkwel and Keiro. Due to the lack of data, the present paper only considers the Omo River Basin, which contributes around 90% of the inflow into the lake. Lumped and semi-lumped hydrological models were developed using the USACE’s HEC-HMS tool. The calibration and validation were carried out using the EU computed discharges of the Global Flood Awareness System as observed flow. The validated model was used to assess the impact on the lake due to the operation of three reservoirs in the basin; Gibe I, II and III. The variation of the water level of Lake Turkana was determined by using the model builder tool in ArcGIS. The lake water level model was validated using the Normalized Difference Water Index of Landsat 5 and Landsat 7 satellite imagery. Finally, using the semi-lumped hydrological model and the lake water level variation model, two scenarios were simulated to assess the lake‘s condition due to three consecutive driest and wettest years. The semi-lumped model showed satisfactory goodness of fit compared to the lumped model, therefore it is concluded that it can be used to assess the impact of upstream developments in the Omo basin, on the shoreline and water level variations of Lake Turkana with reasonable accuracy.</p>Charuni WICKRAMARACHCHIIoana POPESCUAndreja JONOSKIJochen WENNINGER
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2023-12-192023-12-192916918610.5281/zenodo.10376148 In Memoriam – Jana Ion (1934-2023)
https://journal.geoecomar.ro/geo-eco-marina/article/view/15_2023
<p>Dr. Jana Ion (Săndulescu) was born on the 24th of January 1934 in Bucharest. After graduation of the high-school she became student of the University of Bucharest, Faculty of Geology, obtaining her Diploma in Geology in 1965. She retired from the Geological Institute of Romania, where she worked over 40 years.</p>Mihaela MELINTE-DOBRINESCUTitus BRUSTUR
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2023-12-202023-12-2029187189