scholarly journals Plant Sedimentary Ancient DNA From Far East Russia Covering the Last 28,000 Years Reveals Different Assembly Rules in Cold and Warm Climates

2021 ◽  
Vol 9 ◽  
Author(s):  
Sichao Huang ◽  
Kathleen R. Stoof-Leichsenring ◽  
Sisi Liu ◽  
Jeremy Courtin ◽  
Andrej A. Andreev ◽  
...  
Keyword(s):  
Ancient Dna ◽  
Genetic Divergence ◽  
Far East ◽  
Cold Climate ◽  
The Arctic ◽  
Assembly Rules ◽  
Number Of Species ◽  
Shrub Tundra ◽  
Plant Assemblages ◽  
The Impact

Woody plants are expanding into the Arctic in response to the warming climate. The impact on arctic plant communities is not well understood due to the limited knowledge about plant assembly rules. Records of past plant diversity over long time series are rare. Here, we applied sedimentary ancient DNA metabarcoding targeting the P6 loop of the chloroplast trnL gene to a sediment record from Lake Ilirney (central Chukotka, Far Eastern Russia) covering the last 28 thousand years. Our results show that forb-rich steppe-tundra and dwarf-shrub tundra dominated during the cold climate before 14 ka, while deciduous erect-shrub tundra was abundant during the warm period since 14 ka. Larix invasion during the late Holocene substantially lagged behind the likely warmest period between 10 and 6 ka, where the vegetation biomass could be highest. We reveal highest richness during 28–23 ka and a second richness peak during 13–9 ka, with both periods being accompanied by low relative abundance of shrubs. During the cold period before 14 ka, rich plant assemblages were phylogenetically clustered, suggesting low genetic divergence in the assemblages despite the great number of species. This probably originates from environmental filtering along with niche differentiation due to limited resources under harsh environmental conditions. In contrast, during the warmer period after 14 ka, rich plant assemblages were phylogenetically overdispersed. This results from a high number of species which were found to harbor high genetic divergence, likely originating from an erratic recruitment process in the course of warming. Some of our evidence may be of relevance for inferring future arctic plant assembly rules and diversity changes. By analogy to the past, we expect a lagged response of tree invasion. Plant richness might overshoot in the short term; in the long-term, however, the ongoing expansion of deciduous shrubs will eventually result in a phylogenetically more diverse community.

scholarly journals Plant sedimentary ancient DNA from Far East Russia covering the last 28 ka reveals different assembly rules in cold and warm climates

2020 ◽  
Author(s):  
Sichao Huang ◽  
Kathleen R. Stoof-Leichsenring ◽  
Sisi Liu ◽  
Jeremy Courtin ◽  
Andrej A. Andreev ◽  
...  
Keyword(s):  
Plant Diversity ◽  
Ancient Dna ◽  
Far East ◽  
Environmental Filtering ◽  
Niche Differentiation ◽  
Cold Climate ◽  
The Arctic ◽  
Assembly Rules ◽  
East Russia ◽  
Shrub Tundra

AbstractWoody plants are expanding into the Arctic under a warming climate. The related impact on plant diversity is not well understood because we have only limited knowledge about plant assembly rules and because of a lack of time-series of plant diversity. Here, we applied sedimentary ancient DNA metabarcoding using the plant-specific g and h primers of the trnL gene to a sediment record from Lake Ilirney (central Chukotka Far Eastern Russia) covering the last 28 thousand years. Our results show that forb-dominated steppe-tundra and Saliceae-rich dwarf-shrub tundra communities dominated during the cold climate before 14 ka, while deciduous erect-shrub tundra was abundant during the warm period between 14 and 0 ka. Larix invasion during the late Holocene substantially lagged behind the period of densest vegetation and likely warmest period between 10 and 6 ka. Overall, we discovered the highest richness during 28–23 ka and a second richness peak during 13–10 ka: both periods are characterised by low shrub abundance. The richest communities during the cold pre-14 ka period were phylogenetically clustered, which probably originates from environmental filtering along with niche differentiation under limited resources. In contrast, the richest post-14 ka community was phylogenetically overdispersed, likely originating from an erratic recruitment process in the course of warming. Despite differences in timescale, some of our evidence can be relevant to arctic plant diversity changes. By analogy to the past, we expect a lagged response of tree invasion. In the long-term, ongoing expansion of deciduous shrubs will eventually result in a phylogenetically more diverse community but will also cause reduced plant taxonomic richness; however, richness may overshoot in the short-term.

scholarly journals Vegetation responses to interglacial warming in the Arctic: examples from Lake El'gygytgyn, Far East Russian Arctic

2013 ◽  
Vol 9 (3) ◽  
pp. 1211-1219 ◽  
Author(s):  
A. V. Lozhkin ◽  
P. M. Anderson
Keyword(s):  
Deciduous Forest ◽  
Russian Far East ◽  
Coniferous Forest ◽  
Far East ◽  
The Arctic ◽  
Dark Coniferous Forest ◽  
Vegetation Responses ◽  
Wide Range ◽  
Lake El’Gygytgyn ◽  
Shrub Tundra

Abstract. Preliminary analyses of Lake El'gygytgyn sediment indicate a wide range of ecosystem responses to warmer than present climates. While palynological work describing all interglacial vegetation is ongoing, sufficient data exist to compare recent warm events (the postglacial thermal maximum, PGTM, and marine isotope stage, MIS5) with "super" interglaciations (MIS11, MIS31). Palynological assemblages associated with these climatic optima suggest two types of vegetation responses: one dominated by deciduous taxa (PGTM, MIS5) and the second by evergreen conifers (MIS11, MIS31). MIS11 forests show a similarity to modern Picea–Larix–Betula–Alnus forests of Siberia. While dark coniferous forest also characterizes MIS31, the pollen taxa show an affinity to the boreal forest of the lower Amur valley (southern Russian Far East). Despite vegetation differences during these thermal maxima, all glacial–interglacial transitions are alike, being dominated by deciduous woody taxa. Initially Betula shrub tundra established and was replaced by tundra with tree-sized shrubs (PGTM), Betula woodland (MIS5), or Betula–Larix (MIS11, MIS31) forest. The consistent occurrence of deciduous forest and/or high shrub tundra before the incidence of maximum warmth underscores the importance of this biome for modeling efforts. The El'gygytgyn data also suggest a possible elimination or massive reduction of Arctic plant communities under extreme warm-earth scenarios.

Negative changes in permafrost due to waste storage

2020 ◽  
Author(s):  
Valery Grebenets ◽  
Fedor Iurov ◽  
Vasily Tolmanov
Keyword(s):  
Chemical Reactions ◽  
Frozen Soil ◽  
Cold Climate ◽  
The Arctic ◽  
Chemical Pollution ◽  
Drilling Fluids ◽  
Waste Storage ◽  
Frozen State ◽  
The Impact ◽  
Cryogenic Processes

<p>Keywords: permafrost, waste, hazardous cryogenic processes</p><p>The problem of waste storage is particularly acute in Arctic. This is due to the vulnerability of northern ecosystems, the existence of permafrost, especially vulnerable to anthropogenic impact, the water-resistant properties of frozen rocks and the effect of destructive cryogenic processes. In addition, the causes of concern are the trends in air and frozen soil temperatures reported for the northern regions: pollutants stored in relatively stable frozen state can be released into the environment as a result of thawing. This is especially true for industrial regions, where billions of cubic meters of waste from the mining and beneficiation of ores and coal, form timber processing, mine water spills and drilling fluids, etc. are stored in a frozen state.</p><p>Field investigations were carried out in number of settlements in cryolithozone of Russia (Norilsk, Vorkuta, Igarka, settlements in the lower Ob, national villages of Taimyr, etc.). The observations involved remote sensing methods and included estimation of the area of littering and the types of waste. In many cases sampling for chemical analyzes, thermometry, and mapping of hazardous processes were made.</p><p>The impact of stored wastes on permafrost was divided into three main types: a) mechanical (changing the relief and the flow paths of surface and ground waters); b) physical and chemical (pollution by the waste itself and by its decomposition products); c) thermal (heating of frozen soils by high-temperature waste or heat generation during various chemical reactions).</p><p>During the research, 6 main types of waste storage were identified, each of which had a destructive effect on permafrost soils and northern ecosystems:</p><p>1) dumps of municipal solid waste (inherent in all settlements);</p><p>2) storages of industrial waste, tailing storage facilities in the industrial centers of the north;</p><p>3) abandoned and cluttered territories;</p><p>4) landfills of timber processing waste in the centers of the timber industry;</p><p>5) rock dumps in open-cast mining sites, which in the cold climate can transform into rock glaciers;</p><p>6) storage areas for polluted snow tranfered from built-up areas.</p><p>Particular attention was paid to the accumulation of chemical pollutants in industrial centers (with Norilsk industrial region as an example). This problem in conditions of permafrost is exacerbated by the low self-purification of northern biogeocenoses; slowdown of oxidation and some other chemical reactions in cold climates; drainage and unloading of groundwater of seasonally thawed layer, intra-permafrost and under-permafrost taliks into the water bodies.</p><p>The use of imperfect technologies for the extraction and processing the raw materials, remains of past years practices with neglected environmental situation, the lack of special standards for the storage of waste and industrial by-products, the lack of development of waste disposal methods for severe climatic conditions led to the pollution of vast territories and to destruction of many ecosystems.</p><p>This work was supported by the RFBR grant 18-05-60080 “Dangerous nival-glacial and cryogenic processes and their impact on infrastructure in the Arctic”.</p>

scholarly journals Assessment of safety and economy of navigation in ice on the Northen Sea route

2018 ◽  
Vol 19 (6) ◽  
pp. 193-197 ◽  
Author(s):  
Tadeusz Pastusiak
Keyword(s):  
Far East ◽  
Route Planning ◽  
The Arctic ◽  
High Concentration ◽  
Sea Transport ◽  
The North ◽  
Sea Transportation ◽  
The North Sea ◽  
Ice Conditions ◽  
The Impact

This article discusses safety and economic issues of sea transport during transit voyages of a vessel across the North Sea Route (NSR) in the Arctic Ocean. The main obstacles to shipping and threat to vessels are the regions of ice occurrence and, in particular, clusters of ice with high and very high concentration, thickness and hummocking occurring each year in the same places, which are called ice massifs. Speed of vessels has the greatest impact on the economy of transit voyage. The safe speed of vessels, as a means of transport that ensures trouble-free navigation of the vessels depends on ice conditions. Until now, the concept of safe speed has not been precisely defined. Also, the impact of speed of the vessel in certain ice conditions on overcoming the ice and the risk of damage to vessel has not been precisely defined. Issues of direct and potential costs of vessel’s safety, damages and consequences of damages in ice were also not fully considered. The author analyzed the above relationships on the example of the first commercial vessel transit voyage through the NSR and obtained generalized results that can be applied to the initial, general and tactical route planning till 10 days - 6 months ahead and transit schedule of a vessel between Europe and the Far East ports via the Northern Sea Route. The presented method should increase safety and economy of sea transportation in areas covered with ice.

Sea spray icing: The physical process, and review of prediction models and winterization techniques

2021 ◽  
pp. 1-26
Author(s):  
Sujay Deshpande ◽  
Ane Sæterdal ◽  
Per-Arne Sundsbø
Keyword(s):  
Prediction Models ◽  
Offshore Structures ◽  
Cold Climate ◽  
Working Environment ◽  
The Arctic ◽  
Design Stage ◽  
Sea Spray ◽  
Ice Accretion ◽  
Sea Wind ◽  
The Impact

Abstract Ice accretion on marine vessels and offshore structures is a severe hazard in the Polar Regions. There is increasing activities related to oil and gas exploration, tourism, cargo transport, and fishing in the Arctic. Ice accretion can cause vessel instability, excess load on marine structures and represents a safety risk for outdoor working environment and operations. Freezing sea spray is the main contributor to marine icing. For safe operations in cold climate, it is essential to have verified models for prediction of icing. Sea spray icing forecast models have improved. Empirical and theoretical models providing icing rates based may be useful as guidelines. For predicting the distribution of icing on a surface at the design stage, Computational Fluid Dynamics has to be applied along with a freezing module. State-of-the-art models for numerical simulation of sea spray icing are still not fully capable of modelling complex ship-sea-wind interactions with spray generation and impact of shipped water. Existing models include good understanding of spray flow effects and freezing. Further development should focus on developing models for dynamic ship-sea-wind interactions, in particular including spray generation, effects of shipped water and distribution of icing on the vessel surface. More experimental and full-scale data is needed for development and verification of new and improved models. Models that estimate ice distribution may improve the winterization design process and reduce effort required for de-icing. Improved methods for de-icing and anti-icing will reduce the impact of sea spray icing and increase safety for marine operations in cold waters.

Impact of Orbital Parameters and Greenhouse Gas on the Climate of MIS 7 and MIS 5 Glacial Inceptions

2014 ◽  
Vol 27 (23) ◽  
pp. 8918-8933 ◽  
Author(s):  
Florence Colleoni ◽  
Simona Masina ◽  
Annalisa Cherchi ◽  
Doroteaciro Iovino
Keyword(s):  
Greenhouse Gas ◽  
General Circulation ◽  
Regional Scale ◽  
Circulation Model ◽  
Ocean General Circulation Model ◽  
Cold Climate ◽  
The Arctic ◽  
Orbital Parameters ◽  
The Impact ◽  
Mis 5

Abstract This work explores the impact of orbital parameters and greenhouse gas concentrations on the climate of marine isotope stage (MIS) 7 glacial inception and compares it to that of MIS 5. The authors use a coupled atmosphere–ocean general circulation model to simulate the mean climate state of six time slices at 115, 122, 125, 229, 236, and 239 kyr, representative of a climate evolution from interglacial to glacial inception conditions. The simulations are designed to separate the effects of orbital parameters from those of greenhouse gas (GHG). Their results show that, in all the time slices considered, MIS 7 boreal lands mean annual climate is colder than the MIS 5 one. This difference is explained at 70% by the impact of the MIS 7 GHG. While the impact of GHG over Northern Hemisphere is homogeneous, the difference in temperature between MIS 7 and MIS 5 due to orbital parameters differs regionally and is linked with the Arctic Oscillation. The perennial snow cover is larger in all the MIS 7 experiments compared to MIS 5, as a result of MIS 7 orbital parameters, strengthened by GHG. At regional scale, Eurasia exhibits the strongest response to MIS 7 cold climate with a perennial snow area 3 times larger than in MIS 5 experiments. This suggests that MIS 7 glacial inception is more favorable over this area than over North America. Furthermore, at 239 kyr, the perennial snow covers an area equivalent to that of MIS 5 glacial inception (115 kyr). The authors suggest that MIS 7 glacial inception is more extensive than MIS 5 glacial inception over the high latitudes.

scholarly journals Economic Behaviour Strategies of the Northern Small-Numbered Indigenous Peoples and their Impact on Subjective Well-Being

2021 ◽  
pp. 797-809
Author(s):  
Ekaterina V. Zabelina ◽  
Svetlana A. Kurnosova ◽  
Natalya P. Koptseva ◽  
Vladimir S. Luzan ◽  
Ksenia E. Shchukina
Keyword(s):  
Indigenous Peoples ◽  
Far East ◽  
Arctic Region ◽  
Well Being ◽  
Financial Knowledge ◽  
The Arctic ◽  
Subjective Well Being ◽  
Economic Behaviour ◽  
Indigenous Minorities ◽  
The Impact

Russian academic literature is characterised by a lack of data on the features of the economic behaviour of representatives of the indigenous small-numbered peoples of the North, Siberia, and the Far East of the Russian Federation (hereinafter referred to as ISNPN, the indigenous minorities). Nevertheless, economic, environmental, geopolitical, and social changes in the Arctic region of Russia make it extremely relevant to study the process of transformation of the economic behaviour of these peoples. The article presents the results of a study of the main strategies of economic behaviour of the indigenous peoples (Nenets, Dolgans, Itelmens, Koryaks, Nivkhs, Chukchi, and Evens) and the impact of these strategies on their subjective well-being. In this way, factor analysis made it possible to identify 4 factors that can be interpreted as independent strategies of the economic behaviour of the ISNPN: the saving strategy based on financial knowledge and activity; the strategy of independent financial achievements; the restrictive strategy in the economic sphere based on rationality and independence, and the strategy of hired labour. The article notes that the regression analysis demonstrated particular importance of the saving strategy based on financial knowledge and activity, which makes the greatest contribution to increasing subjective well-being of the indigenous peoples. It has been noted that a peculiarity of the economic behaviour of the ISNPN representatives is the predominance of an orientation towards savings and rationality in almost all identified strategies. The results of the study are summarised in the conclusion, and a deduction about the significant role of increasing financial literacy in improving subjective well-being of indigenous minorities is drawn

scholarly journals Development of the Russian Far East and the Arctic: demographic aspect

2021 ◽  
pp. 79-86
Author(s):  
S. G. Serikov ◽  
T. N. Ganina
Keyword(s):  
Economic Development ◽  
Russian Far East ◽  
Far East ◽  
The Arctic ◽  
Demographic Situation ◽  
Socio Economic Development ◽  
Labor Resources ◽  
Regional Product ◽  
The Impact ◽  
The Russian Far East

The article considers the geostrategic territories of the Russian Far East and the Arctic. The paper emphasizes the need to ensure the accelerated socio-economic development of these territories in order to preserve and strengthen the positions of Russia as an energy and mineral-raw superpower. In the course of analyzing the demographic situation, the authors identified the main reasons for the migration movement of the population, and also assessed the impact of the demographic situation on the socio-economic development of the Russian Far East and the Arctic. The study established that the attraction of labor resources to the extractive industry would quickly increase the gross regional product from the use of the existing resource and energy base of the macro region. The use of the natural resource potential of the Far East and the Arctic will strengthen the status of Russia in the international arena as an energy and mineral-raw superpower.

scholarly journals Problems and Prospects of Atlantic Salmon Mariculture Development in the Russian Arctic

2021 ◽  
pp. 5-18
Author(s):  
Anatoly M. VASILYEV ◽  
◽  
Marina A. ALEKSANDROVA ◽  
Keyword(s):  
Atlantic Salmon ◽  
Import Substitution ◽  
Far East ◽  
Fish Farming ◽  
Economic Conditions ◽  
Practical Significance ◽  
The Arctic ◽  
Russian Arctic ◽  
Murmansk Region ◽  
The Impact

The authors present the volume of Atlantic salmon farming in the world and in the Russian Arctic. It shows the reasons that hamper the development of salmonid mariculture in the Russian Arctic: the lack of own planting material adapted to Arctic waters, high-quality fodder, fish diseases and others. Objectives of the article: to show the peculiarities of natural and socio-economic conditions of mariculture development in the Russian Arctic and the impact of Atlantic salmon mariculture on import substitution. Relevance stems from the need to substantiate the sources of import substitution of salmon products. The most important results: the main factors that reduce the economic efficiency of growing and selling products were found; the possible causes of salmon diseases in the Russian Arctic and their impact on production processes were systematized, the possible impact of caged fish farming on the environment and on the population of salmon in the Arctic zone was shown. Practical significance: the article shows the influence of possible escapes of farmed salmon on the socio-economic conditions of the population of the Terskiy coast of the Murmansk region and the White Sea basin. It is proposed to introduce Atlantic GM salmon into the composition of genetically modified products. It is shown that import substitution is fully provided by Atlantic salmon mariculture and the supply of wild salmon from the Far East to the European part of Russia.

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