scholarly journals A new Platycheirus species of the manicatus Meigen subgroup from the arctic Russia (Diptera: Syrphidae)

2019 ◽  
Vol 23 (3) ◽  
pp. 165-168
Author(s):  
Anatolii Barkalov ◽  
Tore Nielsen
Keyword(s):  
The Arctic ◽  
Fore Tibia ◽  
Basal Segment ◽  
Arctic Russia

AnewPlatycheirus species of the manicatus subgroup is described from Taimyr in the arctic Russia. It is characterised by a facial knob, a row of scattered straight setae from base to apex postero-laterally on fore tibia, and a broad, angulate basal segment of front leg. Tergites 2–4 each with a couple of vague dark bluish grey dust spots. It is compared with similar Holarctic tundra species.

scholarly journals Amplified bioproductivity during Transition IV (332 000–342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn

2013 ◽  
Vol 9 (2) ◽  
pp. 679-686 ◽  
Author(s):  
L. Cunningham ◽  
H. Vogel ◽  
V. Wennrich ◽  
O. Juschus ◽  
N. Nowaczyk ◽  
...  
Keyword(s):  
Sharp Increase ◽  
Biogenic Silica ◽  
Ice Cores ◽  
Climatic Conditions ◽  
The Arctic ◽  
Significant Shift ◽  
Geochemical Parameters ◽  
Lake El’Gygytgyn ◽  
Arctic Russia

Abstract. To date, terrestrial archives of long-term climatic change within the Arctic have widely been restricted to ice cores from Greenland and, more recently, sediments from Lake El'gygytgyn in northeast Arctic Russia. Sediments from this lake contain a paleoclimate record of glacial-interglacial cycles during the last three million years. Low-resolution studies at this lake have suggested that changes observed during Transition IV (the transition from marine isotope stage (MIS) 10 to MIS 9) are of greater amplitude than any observed since. In this study, geochemical parameters are used to infer past climatic conditions thus providing the first high-resolution analyses of Transition IV from a terrestrial Arctic setting. These results demonstrate that a significant shift in climate was subsequently followed by a rapid increase in biogenic silica (BSi) production. Following this sharp increase, bioproductivity remained high, but variable, for over a thousand years. This study reveals differences in the timing and magnitude of change within the ratio of silica to titanium (Si/Ti) and BSi records that would not be apparent in lower resolution studies. This has significant implications for the increasingly common use of Si/Ti data as an alternative to traditional BSi measurements.

scholarly journals The New Geopolitics of the Arctic: Russia, China and the EU

European View ◽  
2019 ◽  
Vol 18 (2) ◽  
pp. 259-259
Author(s):  
Andreas Østhagen
Keyword(s):  
The Arctic ◽  
Arctic Russia ◽  
The Eu

scholarly journals Ten Years of International Shipping on the Northern Sea Route: Trends and Challenges

2021 ◽  
Vol 12 (0) ◽  
pp. 4
Author(s):  
Björn Gunnarsson ◽  
Arild Moe
Keyword(s):  
International Market ◽  
The Arctic ◽  
Current Phase ◽  
Northern Coast ◽  
Shipping Industry ◽  
International Shipping ◽  
Northern Sea Route ◽  
The Pacific ◽  
Environmentally Sound ◽  
Arctic Russia

Analysis of detailed statistics shows remarkable fluctuations in the volume and composition of voyages on the Northern Sea Route (NSR) along the northern coast of Russia since international use began in 2010. There has been strong growth in destination shipping between the Arctic and ports outside the region, but transit shipping between the Pacific and the Atlantic has not experienced the growth many had anticipated. Explanations are found in international market conditions as well as in the management of the NSR, with important lessons for the future development of different shipping segments. Shipping companies from several countries took part in the period up to 2019, but they seem to have become less central in the current phase of NSR shipping, which is dominated by the transport of hydrocarbons out of the Arctic. Russia expects international transit to pick up later. However, Russia alone cannot determine the volume of international traffic: it is the international shipping industry that will assess the balance of factors and conditions, and conclude if and when the shorter Arctic routes are safe, efficient, reliable, environmentally sound and economically viable in comparison with other routes.

scholarly journals Reproduction of Pisidium casertanum (Poli, 1791) in Arctic lake

2015 ◽  
Vol 2 (1) ◽  
pp. 140212 ◽  
Author(s):  
Yulia Bespalaya ◽  
Ivan Bolotov ◽  
Olga Aksenova ◽  
Alexander Kondakov ◽  
Inga Paltser ◽  
...  
Keyword(s):  
Shell Length ◽  
Extreme Environment ◽  
The Arctic ◽  
Harsh Environment ◽  
Arctic Lake ◽  
Ecological Adaptations ◽  
Asynchronous Development ◽  
Population Breeding ◽  
Coin Flipping ◽  
Arctic Russia

Freshwater invertebrates are able to develop specific ecological adaptations that enable them to successfully inhabit an extreme environment. We investigated the brooding bivalve of Pisidium casertanum in Talatinskoe Lake, Vaigach Island, Arctic Russia. Here, quantitative surveys were conducted, with the collection and dissections of 765 molluscs, on the basis of which analyses on the brood sacs length (marsupia) and the number and size of embryos, were performed. In this study, the number of brooded embryos was positively correlated with the parent's shell length. The number of extramarsupial embryos was much lower than the number of intramarsupial embryos. Our research also showed that the brood sac length and embryos within one individual can vary significantly. Thus, we detected that P. casertanum has a specific brooding mechanism, accompanied by asynchronous development and embryos release by the parent. We suggest that such a mode could result in the coin-flipping effect that, presumably, increases the population breeding success in the harsh environment of the Arctic lake.

scholarly journals The first record of Boloria frigga (Lepidoptera: Nymphalidae) on Kolguev Island, Arctic Russia

2021 ◽  
Vol 64 (2) ◽  
pp. 103-108
Author(s):  
Grigory S. Potapov ◽  
Elizaveta A. Spitsyna ◽  
Vitaly M. Spitsyn
Keyword(s):  
New Record ◽  
First Record ◽  
European Russia ◽  
The Arctic ◽  
Arctic Russia ◽  
Kolguev Island

A new record of Boloria frigga from the Arctic islands of European Russia is given. Image of a captured specimen, as well as brief considerations on the species habitat, are provided.  

Occurrence of a Sphaerium species (Bivalvia: Sphaeriidae) of Nearctic origin in European Arctic Russia (Vaigach Island) indicates an ancient exchange between freshwater faunas across the Arctic

Polar Biology ◽  
2015 ◽  
Vol 38 (9) ◽  
pp. 1545-1551 ◽  
Author(s):  
Yulia Bespalaya ◽  
Ivan Bolotov ◽  
Olga Aksenova ◽  
Alexander Kondakov ◽  
Mikhail Gofarov ◽  
...  
Keyword(s):  
The Arctic ◽  
European Arctic ◽  
Ancient Exchange ◽  
Arctic Russia

The work of networks: Embedding firms, transport, and the state in the Russian Arctic oil and gas sector

2015 ◽  
Vol 48 (3) ◽  
pp. 558-576 ◽  
Author(s):  
Scott R Stephenson ◽  
John A Agnew
Keyword(s):  
Oil And Gas ◽  
Physical Geography ◽  
The State ◽  
The Arctic ◽  
Transport Systems ◽  
Russian Arctic ◽  
Production Network ◽  
Political Actors ◽  
Oil And Gas Sector ◽  
Arctic Russia

The “network” has gained widespread acceptance within economic geography as a metaphor for economic interaction. Consistent with a global production network (GPN) approach, extractive industries are deeply embedded in political structures, physical infrastructure, and environmental conditions. We advocate for a GPN framework that emphasizes the co-operation of multiple, differentiated networks at each stage of a production network. Furthermore, the physical geography of sub-national spaces as well as trans-national spaces linking resources with destination markets imposes critical constraints on the structure and operation of oil and natural-gas extraction. We attempt to move beyond notions of a singular network encompassing all aspects of production by contextualizing extractive activities within the geopolitical economy of Arctic Russia. Our aim is twofold: to develop a more carefully articulated conception of networks based on the different economic principles and political regulation at work within different types of networks, and to show how the Russian Arctic oil and gas sector can only be adequately understood with such a nuanced approach. The Arctic case illustrates well the complex entanglement of the state and political actors in networks of firms and specialized transport systems. We first deconstruct the network concept to establish the economic principles, actors, and spaces that comprise the extractive production network, and then examine the extractive hydrocarbon networks active in Arctic Russia through this analytical lens.

scholarly journals Amplified bioproductivity during Transition IV (332 000–342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn

2012 ◽  
Vol 8 (6) ◽  
pp. 5341-5358 ◽  
Author(s):  
L. Cunningham ◽  
H. Vogel ◽  
V. Wennrich ◽  
O. Juschus ◽  
N. Nowaczyk ◽  
...  
Keyword(s):  
Biogenic Silica ◽  
Ice Cores ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Significant Shift ◽  
Geochemical Parameters ◽  
Lake El’Gygytgyn ◽  
Arctic Russia

Abstract. To date, terrestrial archives of long-term climatic change within the arctic region have widely been restricted to ice cores from Greenland and, more recently, sediments from Lake El'gygytgyn in Northeast Arctic Russia. Sediments from this lake contain a paleoclimate record of glacial-interglacial cycles during the last three million years. Low resolution studies at this lake have suggested that changes observed during Transition IV are of greater amplitude than any observed since. In this study, geochemical parameters are used to infer past climatic conditions thus providing the first high resolution analyses of Transition IV from a terrestrial arctic setting. These results demonstrate that a significant shift in climate was subsequently followed by a rapid increase in biogenic silica production. Following this sharp increase, bioproductivity remained high, but variable, for over a thousand years. This study reveals differences in the timing and magnitude of change within the ratio of silica to titanium (Si/Ti) and biogenic silica (BSi) records that would not be apparent in lower resolution studies. This has significant implications for the increasingly common use of Si/Ti data as an alternative to traditional BSi measurements.

Ameroconium cladoniaegen. et sp. nov. andPhoma psoromatissp. nov., new anamorphic lichenicolous fungi from the Holarctic

2013 ◽  
Vol 45 (5) ◽  
pp. 583-591 ◽  
Author(s):  
Mikhail P. ZHURBENKO ◽  
Uwe BRAUN
Keyword(s):  
Type Species ◽  
The Arctic ◽  
Dematiaceous Hyphomycetes ◽  
Lichenicolous Fungi ◽  
First Time ◽  
Arctic Russia

AbstractThe new lichenicolous genusAmeroconium(dematiaceous hyphomycetes), with its type speciesA. cladoniaeand the new lichenicolous speciesPhoma psoromatis(pycnidial coelomycetes), are described, discussed and illustrated.Phoma lobariaeis recorded for the first time from the Arctic, Russia and Asia onLobaria linita.

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