scholarly journals On the origin and evolution of a new anchialine stygobitic <i>Microceratina</i> species (Crustacea, Ostracoda) from Christmas Island (Indian Ocean)

2004 ◽  
Vol 23 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Tadeusz Namiotko ◽  
Karel Wouters ◽  
Dan L. Danielopol ◽  
William F. Humphreys
Keyword(s):  
Sedimentary Facies ◽  
Marine Species ◽  
New Taxon ◽  
Fossil Species ◽  
Origin And Evolution ◽  
The North ◽  
Christmas Island ◽  
The Pacific ◽  
Tethys Ocean ◽  
The Baltic

Abstract. Marine species of the ostracod genus Microceratina Swanson (Cytheruridae, Eucytherurinae) were until now known only from their hard parts, the valves and carapaces, as no living animals have been described. Here we report the first living population, from a tropical anchialine cave. The description of the limbs and hard parts of this new taxon, M. martensi sp. nov., enhances our understanding of the origin and evolution of the cave-dwelling Microceratina – the new species and M. pseudoamfibola (Barbeito-Gonzalez) from an anchialine cave in Southern Italy – and clarifies their affinities with other Eucytherurinae species. Microceratina is known from both Recent and fossil species (Quaternary, Tertiary and Late Cretaceous) from shelf and deep-sea habitats and/or sedimentary facies, located in the Pacific Ocean (along the Australian and New Zealand coasts), the Mediterranean (Greece and Italy), the North Atlantic (British Isles) and the Baltic Sea (Rügen Island). This suggests that the Microceratina group spread through the expanding Tethys Ocean. The morphological traits of the two cave-dwelling species reflect their ecological conditions. Cave-dwelling Microceratina species appear to have originated from epigean shallow water species predisposed to colonize subterranean habitats.

scholarly journals Air Vice-Marshal Wilfrid Oulton

1998 ◽  
Vol 51 (2) ◽  
pp. 277-278
Keyword(s):  
World War Ii ◽  
Traffic Control ◽  
Task Force ◽  
Royal Air Force ◽  
The North ◽  
Christmas Island ◽  
Select Group ◽  
The Pacific ◽  
Maritime Operations ◽  
Battle Of The Atlantic

Air Vice-Marshal Wilfrid Oulton, who died on 31 October 1997, aged 86, was one of that select group of distinguished Royal Air Force pilots who became equally distinguished navigators. Much of his early Service experience in World War II was spent in Coastal Command, where his natural flying ability combined with his acquired navigator's knowledge and skill led to exceptional operational achievements.In 1943, German submarines were taking a devastating toll of Allied shipping in the North Atlantic and Wilf Oulton was flying long-range patrols over the Bay of Biscay. In May of that year, commanding a Halifax bomber which had been converted for maritime operations, he attacked with depth charges and sank two U-boats and shared in the destruction of a third. For these outstanding successes, which helped mark the Battle of the Atlantic turning in our favour, he was awarded the DSO.Later, and completely different, with the cessation of hostilities, Oulton was jointly responsible for the introduction of the first Air Traffic Control system at Heathrow. And, different again, his ability to inspire confidence and co-operate extremely well with others led to the most challenging peace-time appointment as Joint Task Force Commander of ‘Operation Grapple’, which supported the British hydrogen bomb tests at Christmas Island in the Pacific Ocean.

scholarly journals A dataset on trophic modes of aquatic protists

2020 ◽  
Vol 8 ◽  
Author(s):  
Lisa Schneider ◽  
Konstantinos Anestis ◽  
Joost Mansour ◽  
Anna Anschütz ◽  
Nathalie Gypens ◽  
...  
Keyword(s):  
Expert Knowledge ◽  
Marine Species ◽  
Trophic Group ◽  
Functional Trait ◽  
The North ◽  
Routine Monitoring ◽  
Taxonomic Changes ◽  
The Baltic ◽  
Organic Particles ◽  
Machine Readable

An important functional trait of organisms is their trophic mode. It determines their position within food webs, as well as their function within an ecosystem. For the better part of the 20th century, aquatic protist communities were thought to consist mainly of producers (phytoplankton) and consumers (protozooplankton). Phytoplankton cover their energy requirements through photosynthesis (phototrophy), while protozooplankton graze on prey and organic particles (phagotrophy). However, over the past decades, it was shown that another trophic group (mixoplankton) comprise a notable part of aquatic protist communities. Mixoplankton employ a third trophic mode by combining phototrophy and phagotrophy (mixotrophy). Due to the historical dichotomy, it is not straightforward to gain adequate and correct information on the trophic mode of aquatic protists. Long hours of literature research or expert knowledge are needed to correctly assign trophic modes. Additionally, aquatic protists also have a long history of undergoing taxonomic changes which make it difficult to compare past and present literature. While WoRMS, the World Register of Marine Species, keeps track of the taxonomic changes and assigns each species a unique AphiaID that can be linked to its various historic and present taxonomic hierarchy, there is currently no machine-readable database to query aquatic protists for their trophic modes. This paper describes a dataset that was submitted to WoRMS and links aquatic protist taxa, with a focus on marine taxa, to their AphiaID and their trophic mode. The bulk of the data used for this dataset stems from (routine) monitoring stations in the North Sea and the Baltic Sea. The data were augmented and checked against state-of-the-art knowledge on mixoplankton taxa by consulting literature and experts. Thus, this dataset provides a first attempt to make the trophic mode of aquatic protists easily accessible in both a human- and machine-readable format.

Metamorphic evolution and age constraints of the garnet-bearing mica schist from the Xindaduo area of the Sumdo (U)HP metamorphic belt, Tibet

2018 ◽  
Vol 156 (07) ◽  
pp. 1175-1189 ◽  
Author(s):  
CONG ZHANG ◽  
THOMAS BADER ◽  
LINGMIN ZHANG ◽  
TINGTING SHEN ◽  
PENG LI ◽  
...  
Keyword(s):  
Mica Schist ◽  
Metamorphic Belt ◽  
Metamorphic Evolution ◽  
Origin And Evolution ◽  
Lhasa Terrane ◽  
The North ◽  
Close Relationship ◽  
The Matrix ◽  
Tethys Ocean ◽  
North And South

AbstractAs one of the major components of the Himalayan–Tibetan Orogeny, the Lhasa terrane plays a key role in understanding the origin and evolution of this giant orogenic belt and the opening and closure of the Tethys oceans. The eclogite-bearing Sumdo Complex in the central Lhasa terrane was recognized as the main suture of the Palaeo-Tethys Ocean between the north and south Lhasa sub-terranes. Despite the eclogite having been studied for a long time, no attempts have been applied to studying the country rocks, causing confusion in understanding the relationship between the eclogite and the adjacent schist. Petrological investigations and phase equilibrium calculations on the garnet-bearing mica schist of the Sumdo Complex have been performed to constrain its metamorphic evolution. The P–T conditions for three metamorphic stages are constrained as P1 (480–500°C, 2.6–2.7 GPa), P2 (580–600°C, 1.3–1.4 GPa) and R (530°C, 0.9 GPa), which represent the prograde, temperature peak and retrograde stages. Two possible P–T paths were constructed, which experienced isothermal decompression (PT1) or heating with a decompression process (PT2), corresponding to the growth and extinction of garnet porphyroblasts in the matrix. The LA-MC-ICP-MS U–Pb dating method yielded a metamorphic age of 229.7±3.5 Ma, which was interpreted as the age of amphibolite-facies metamorphism at c. 600°C, 1.2–1.4 GPa during the closure of the Palaeo-Tethys Ocean, resulting in the aggregation of the north and south Lhasa sub-terranes. The close relationship between the eclogite and garnet-bearing mica schist, and their similar P–T–t paths indicate an in situ tectonic evolution rather than tectonic juxtaposition during exhumation.

scholarly journals An Oligocene giant rhino provides insights into Paraceratherium evolution

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Tao Deng ◽  
Xiaokang Lu ◽  
Shiqi Wang ◽  
Lawrence J. Flynn ◽  
Danhui Sun ◽  
...  
Keyword(s):  
New Species ◽  
Tibetan Plateau ◽  
Eastern Coast ◽  
The Tibetan Plateau ◽  
Late Oligocene ◽  
Origin And Evolution ◽  
The North ◽  
North Side ◽  
Tethys Ocean ◽  
A New Species

AbstractAs one of the largest land mammals, the origin and evolution of the giant rhino Paraceratherium bugtiense in Pakistan have been unclear. We report a new species Paraceratherium linxiaense sp. nov. from northwestern China with an age of 26.5 Ma. Morphology and phylogeny reveal that P. linxiaense is the highly derived species of the genus Paraceratherium, and its clade with P. lepidum has a tight relationship to P. bugtiense. Based on the paleogeographical literature, P. bugtiense represents a range expansion of Paraceratherium from Central Asia via the Tibetan region. By the late Oligocene, P. lepidum and P. linxiaense were found in the north side of the Tibetan Plateau. The Tibetan region likely hosted some areas with low elevation, possibly under 2000 m during Oligocene, and the lineage of giant rhinos could have dispersed freely along the eastern coast of the Tethys Ocean and perhaps through some lowlands of this region.

scholarly journals The economic belt of the new silk road: Chinese breakthrough in the west or a response to Asian challenges

2015 ◽  
Vol 67 (2-3) ◽  
pp. 196-216 ◽  
Author(s):  
Jasminka Simic
Keyword(s):  
Far East ◽  
World Market ◽  
Silk Road ◽  
The North ◽  
Eurasian Economic Union ◽  
Central Asian ◽  
The Pacific ◽  
Road Project ◽  
The Baltic ◽  
Ancient Silk Road

The paper analyses how the Chinese project of establishing the Economic Belt of the New Silk Road challenges newly formed Eurasian Economic Union, with Russia as the leading force, as well as the North-American and Pacific trade network, dominated by the U.S. The author discusses how the overlapping responsibilities and influence of these regional economic groups may affect their complementarities and competitiveness on the world market, and how they may impact the future course of international relations. The Economic Belt is aimed at creating and strengthening economic, transport, human and cultural relations between China and Central Asian countries, but without Russia. The New Silk Road would stretch from the Pacific to the Baltic Sea, encompassing land and sea trading routes, and follows the route of the ancient Silk Road. When the New Silk Road project, linking three continents, is completed, it will bring new chance for development for China as well as for all other countries on the New Silk Road, including those in the Southeastern Europe. The author concludes that the Economic Belt of the New Silk Road might relax conflicts and quarrels between Western and Far East countries in regard to their aspirations to dominate in Euroasia.

Reinterpretation of the North American apparent polar wander curve for the interval 800–1500 Ma

1980 ◽  
Vol 17 (9) ◽  
pp. 1229-1235 ◽  
Author(s):  
Glenn W. Berger ◽  
Derek York
Keyword(s):  
North America ◽  
North American ◽  
Baltic Shield ◽  
Drift Rate ◽  
El Paso ◽  
Continental Drift ◽  
Polar Wander ◽  
The North ◽  
The Pacific ◽  
The Baltic

We have reviewed the geochronology of rocks having paleopoles in the interval 800–1500 Ma from North America, Greenland, and the Baltic Shield. The present uncertainties in the acquisition times of the remanent magnitizations allow the construction of a simplified apparent polar wander curve for North America that incorporates Sveconorwegian paleopoles in a Grenville Loop, and that places poles from the El Paso, Stoer Group, and Aillik Bay rocks on the Logan Loop. Furthermore, the sense of motion through poles older than ~ 1.3 Ga is reversed to permit the shortest connection to poles older than 1.6 Ga. As well, the timing and shape of the Hadrynian Track are modified so that it begins in the Atlantic hemisphere at ~ 800 Ma and terminates in the Pacific at ~ 650 Ma, representing a minimum average continental drift rate of ~ 10 cm/year for this interval.

scholarly journals Chloroclystis v-ata relicta ssp. n. (Lepidoptera, Geometridae), a new taxon from SW Finland, doomed to go extinct?

1996 ◽  
Vol 7 (2) ◽  
pp. 63-66
Author(s):  
Harry Krogerus
Keyword(s):  
Nature Reserve ◽  
European Population ◽  
New Taxon ◽  
The Baltic Sea ◽  
Central European ◽  
New Subspecies ◽  
The North ◽  
The Baltic ◽  
Sea Area ◽  
Central European Population

An isolated population of Chloclystis v-ata (Haworth, 1809), occurring at Karkali Peninsula, a nature reserve in southwestern Finland, is described as a new subspecies, ssp. relicta ssp.n., on the basis of differences in appearence and phenology compared to the nominate subspecies. The Central European population of Ch. v-ata has been expanding to the north, reaching the Baltic Sea area in recent decades and Finland in 1985. Thus, the new subspecies which is actually protected by law is now threatened by hybridization with the nominate subspecies. In contrast to the bivoltine nominate subspecies, the Karkali population is univoltine. The biology of the new subspecies is discussed.

Russian Oil: Production and Exports

2003 ◽  
pp. 136-146
Author(s):  
K. Liuhto
Keyword(s):  
Baltic Sea ◽  
Statistical Data ◽  
Oil Production ◽  
The Baltic Sea ◽  
North West ◽  
The North ◽  
Oil Transportation ◽  
Sea Ports ◽  
The Baltic

Statistical data on reserves, production and exports of Russian oil are provided in the article. The author pays special attention to the expansion of opportunities of sea oil transportation by construction of new oil terminals in the North-West of the country and first of all the largest terminal in Murmansk. In his opinion, one of the main problems in this sphere is prevention of ecological accidents in the process of oil transportation through the Baltic sea ports.

Paleoecological study of bottom sediments of the lake Goluboye (Karelian Isthmus) according to the results of diatom analysis

2019 ◽  
pp. 265-269
Author(s):  
Angelina E. Shatalova ◽  
Uriy A. Kublitsky ◽  
Dmitry A. Subetto ◽  
Anna V. Ludikova ◽  
Alar Rosentau ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Bottom Sediments ◽  
Modern Science ◽  
Karelian Isthmus ◽  
The Baltic Sea ◽  
Diatom Analysis ◽  
North West ◽  
The North ◽  
Important Direction ◽  
The Baltic

The study of paleogeography of lakes is an actual and important direction in modern science. As part of the study of lakes in the North-West of the Karelian Isthmus, this analysis will establish the dynamics of salinity of objects, which will allow to reconstruct changes in the level of the Baltic Sea in the Holocene.

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