Palaeoenvironmental changes and their chronology during the latter half of MIS 5 on the south-eastern coast of the Gulf of Finland

Author(s):  
Anatoly Molodkov ◽  
Nataliya Bolikhovskaya
2019 ◽  
Vol 59 (1) ◽  
pp. 184-186 ◽  
Author(s):  
A. V. Krek ◽  
M. O. Ulyanova ◽  
E. S. Bubnova ◽  
V. A. Krechik ◽  
D. V. Ryabchuk ◽  
...  

In 2017, comprehensive geological, geophysical, hydrological and hydrochemical researches were conducted in the South-Eastern Baltic Sea and the Gulf of Finland. 1775 nautical miles of surveys were conducted using multibeam echosounder and profiler. Surface bottom sediments (156 samples), the upper undisturbed layer of pelitic sediments and bottom water (15 samples), 2 cores were taken. Laboratory analyzes were performed on pH (189), concentration of oxygen (246), suspended matter (286) and oil products (110). Microplastic was also collected in the water (118) and bottom sediments (45). Conducting comprehensive research in the South-Eastern Baltic Sea allowed us to record the weakening of the Major Baltic Inflow effects, followed by changes in the environmental conditions of the region. Geological surveys in the Gulf of Finland expanded the coverage area of the bottom of multibeam surveys and contributed to the refinement of the formation processes of linear and circular transgressions at the bottom.


Author(s):  
Marius Schneider ◽  
Vanessa Ferguson

Situated off the south-eastern coast of Africa in the Indian Ocean, the Republic of Mauritius is an island nation of 2,040 square kilometres (km) with a population of 1.26 million. English is generally accepted as the official language as it is used by the administration and the courts. French is also widely spoken among the population, and most inhabitants are bilingual. Local languages include Créole and Bhojpuri. The working week on the island is from Monday to Friday and the Mauritian rupee (MUR) is the currency used.


2019 ◽  
Vol 99 (5) ◽  
pp. 1231-1236
Author(s):  
Giovanna Corrêa e Figueiredo ◽  
Samara Cazzoli y Goya ◽  
Marcos César de Oliveira Santos

AbstractUrbanization and intense vessel traffic in coastal areas are obstacles for right whales when selecting breeding and calving grounds. Human activities might be the main cause for the recently observed drop in right whale sightings along the south-eastern coast of Brazil. Information concerning the biology and the activities that can potentially affect the presence of individuals along the coast are essential for management purposes, as well as for the recovery of the species stocks after a period of whaling pressure. This study correlated the occurrence of right whales in the northern limit of the breeding ground in the South-western Atlantic Ocean with local geomorphology, degree of urbanization and oceanographic features to better identify suitable areas for use by these whales. The study area was divided into 14 sub-areas based on local coastal geomorphology and discharge of large rivers. The following five ranking criteria were applied to each sub-area: presence of whaling stations and whaling activity in the past; presence and activity of ports; protection from swell, coastal slope and composition of the bottom substrate. The sub-areas that offered conditions conducive to the presence of right whales received higher scores. The proposed criteria were validated by overlapping the ranking scores with the records of right whales sighted in each sub-area. In south-eastern Brazil, protected areas with sandy bottom and gentle slope were associated with more sightings of female-calf pairs. The criteria can be used as a primary diagnostic indicating suitable sub-areas for right whales in poorly known breeding grounds.


2016 ◽  
Vol 26 (4) ◽  
pp. 313-322 ◽  
Author(s):  
Md. Masum Billah ◽  
Hossain Zamal ◽  
Abu Hena Mustafa Kamal ◽  
A. T. M. Rafiqul Hoque ◽  
Md. Mosaddequr Rahman ◽  
...  

Crustaceana ◽  
2012 ◽  
Vol 85 (4-5) ◽  
pp. 497-512 ◽  
Author(s):  
Douglas F. R. Alves ◽  
Marcelo C. R. Carvalho ◽  
Samara De P. Barros-Alves ◽  
Valter J. Cobo

This study provides information on the community structure of brachyuran crabs associated with the green sponge, Amphimedon viridis Duchassaing & Michelotti, 1864, from a beach on the south-eastern coast of Brazil. Monthly collections from May 2002 through August 2003 were carried out on the rocky bottoms off Itaguá Beach (23°27′07″S 45°02′49″W). Crabs on the green sponge banks were hand-caught during snorkelling sessions, and 638 crabs belonging to 31 species, 19 genera, and 10 families were obtained. Biological parameters, including sponge volume, number of individuals, density, richness, diversity, evenness, and dominance changed considerably over time. Species recruitment and foraging habit are some of the factors that drive the richness, dominance, and diversity patterns of this community. The green sponge banks are important sites for recruitment, refuge, and feeding of many species of brachyurans. Therefore, they are also important for the conservation of this group on the south-eastern coast of Brazil.


2021 ◽  
Author(s):  
maurizio serva ◽  
michele pasquini

In this article we try to determine the internal and external cladistics of the four Bantu varieties in the Comoros archipelago. With internal cladistics we mean their mutual classification. Conventionally they are divided into two groups: the Eastern group composed of Shindzwani and Shimaore and the Western group composed of Shimwali and Shingazidja, our results point to a rather different classification.With external cladistics we mean the phylogenetic position of the Comorian languages with respect to the Sabaki and Makhuwa languages spoken along the South-Eastern coast of Africa. During the years consensus has been reached that Comorian Bantu languages belong to the Sabaki group, but they are different from Swahili, our findings confirm this conclusion.


2021 ◽  
Vol 9 (12) ◽  
pp. 1456
Author(s):  
Vitalijus Kondrat ◽  
Ilona Šakurova ◽  
Eglė Baltranaitė ◽  
Loreta Kelpšaitė-Rimkienė

Port of Klaipėda is situated in a complex hydrological system, between the Curonian Lagoon and the Baltic Sea, at the Klaipėda strait in the South-Eastern part of the Baltic Sea. It has almost 300 m of jetties separating the Curonian Spit and the mainland coast, interrupting the main path of sediment transport through the South-Eastern coast of the Baltic Sea. Due to the Port of Klaipėda reconstruction in 2002 and the beach nourishment project, which was started in 2014, the shoreline position change tendency was observed. Shoreline position measurements of various periods can be used to derive quantitative estimates of coastal process directions and intensities. These data can be used to further our understanding of the scale and timing of shoreline changes in a geological and socio-economic context. This study analyzes long- and short-term shoreline position changes before and after the Port of Klaipėda reconstruction in 2002. Positions of historical shorelines from various sources were used, and the rates (EPR, NSM, and SCE) of shoreline changes have been assessed using the Digital Shoreline Analysis System (DSAS). An extension of ArcGIS K-means clustering was applied for shoreline classification into different coastal dynamic stretches. Coastal development has changed in the long-term (1984–2019) perspective: the eroded coast length increased from 1.5 to 4.2 km in the last decades. Coastal accumulation processes have been restored by the Port of Klaipėda executing the coastal zone nourishment project in 2014.


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