scholarly journals Net ecosystem exchange of carbon dioxide and water of far eastern Siberian Larch (<I>Larix cajanderii</I>) on permafrost

2004 ◽  
Vol 1 (2) ◽  
pp. 133-146 ◽  
Author(s):  
A. J. Dolman ◽  
T. C. Maximov ◽  
E. J. Moors ◽  
A. P. Maximov ◽  
J. A. Elbers ◽  
...  
Keyword(s):  
Far East ◽  
Siberian Larch ◽  
Net Ecosystem Exchange ◽  
Growing Season ◽  
Eddy Correlation ◽  
Annual Rainfall ◽  
Surface Conductance ◽  
Co2 Uptake ◽  
Atmospheric Humidity ◽  
Far Eastern

Abstract. Observations of the net ecosystem exchange of water and CO2 were made during two seasons in 2000 and 2001 above a Larch forest in Far East Siberia (Yakutsk). The measurements were obtained by eddy correlation. There is a very sharply pronounced growing season of 100 days when the forest is leaved. Maximum half hourly uptake rates are 18 µmol m-2 s-1; maximum respiration rates are 5 µmol m-2 s-1. Net annual sequestration of carbon was estimated at 160 gCm-2 in 2001. Applying no correction for low friction velocities added 60 g C m-2. The net carbon exchange of the forest was extremely sensitive to small changes in weather that may switch the forest easily from a sink to a source, even in summer. June was the month with highest uptake in 2001. The average evaporation rate of the forest approached 1.46 mm day-1 during the growing season, with peak values of 3 mm day-1 with an estimated annual evaporation of 213 mm, closely approaching the average annual rainfall amount. 2001 was a drier year than 2000 and this is reflected in lower evaporation rates in 2001 than in 2000. The surface conductance of the forest shows a marked response to increasing atmospheric humidity deficits. This affects the CO2 uptake and evaporation in a different manner, with the CO2 uptake being more affected. There appears to be no change in the relation between surface conductance and net ecosystem uptake normalized by the atmospheric humidity deficit at the monthly time scale. The response to atmospheric humidity deficit is an efficient mechanism to prevent severe water loss during the short intense growing season. The associated cost to the sequestration of carbon may be another explanation for the slow growth of these forests in this environment.

scholarly journals Net ecosystem exchange of carbondioxide and water of far eastern Siberian Larch (Larix dahurica) on permafrost

2004 ◽  
Vol 1 (1) ◽  
pp. 275-309 ◽  
Author(s):  
A. J. Dolman ◽  
T. C. Maximov ◽  
E. J. Moors ◽  
A. P. Maximov ◽  
J. A. Elbers ◽  
...  
Keyword(s):  
Far East ◽  
Siberian Larch ◽  
Net Ecosystem Exchange ◽  
Growing Season ◽  
Eddy Correlation ◽  
Annual Rainfall ◽  
Surface Conductance ◽  
Co2 Uptake ◽  
Atmospheric Humidity ◽  
Far Eastern

Abstract. Observations of the net ecosystem exchange of water and CO2were made during two seasons in 2000 and 2001 above a Larch forest in Far East Siberia (Yakutsk). The measurements were obtained by eddy correlation. There is a very sharply pronounced growing season of 100 days when the forest is leaved. Maximum daytime uptake rates are 18 μmol m-2 s-1 maximum respiration rates are 5 μmol m-2 s-1. Net annual sequestration of carbon (C) was estimated at 1.7 (±0.5) ton C ha-1 in 2001. The net carbon exchange of the forest was extremely sensitive to small changes in weather that may switch the forest easily from a sink to a source, even in summer. June was the month with highest uptake in 2001. The average evaporation rate of the forest approached 1.46mm day-1 during the growing season, with peak values of 3mm day-1 with an estimated annual evaporation of 213mm, closely approaching the average annual rainfall amount. 2001 was a drier year than 2000 and this is reflected in the evaporation rates that show lower evaporation rates in 2001 than in 2000. The surface conductance of the forest shows a marked response to increasing atmospheric humidity deficits. This affects the CO2 uptake and evaporation in a different manner, with the CO2 uptake being more affected. There appears to be no change in the relation between surface conductance and normalized net ecosystem uptake at the monthly time scale. The response to atmospheric humidity deficits is an efficient mechanism to prevent severe water loss during the short intense growing season. The associated cost to the sequestration of carbon may be another explanation for the slow growth of these forests in this environment.

scholarly journals Drivers of long-term variability in CO<sub>2</sub> net ecosystem exchange in a temperate peatland

2015 ◽  
Vol 12 (6) ◽  
pp. 1799-1811 ◽  
Author(s):  
C. Helfter ◽  
C. Campbell ◽  
K. J. Dinsmore ◽  
J. Drewer ◽  
M. Coyle ◽  
...  
Keyword(s):  
Air Temperature ◽  
Net Ecosystem Exchange ◽  
Growing Season ◽  
Sink Strength ◽  
Co2 Uptake ◽  
Annual Variability ◽  
Dry Spells ◽  
Co2 Sink ◽  
Winter Air Temperature

Abstract. Land–atmosphere exchange of carbon dioxide (CO2) in peatlands exhibits marked seasonal and inter-annual variability, which subsequently affects the carbon (C) sink strength of catchments across multiple temporal scales. Long-term studies are needed to fully capture the natural variability and therefore identify the key hydrometeorological drivers in the net ecosystem exchange (NEE) of CO2. Since 2002, NEE has been measured continuously by eddy-covariance at Auchencorth Moss, a temperate lowland peatland in central Scotland. Hence this is one of the longest peatland NEE studies to date. For 11 years, the site was a consistent, yet variable, atmospheric CO2 sink ranging from −5.2 to −135.9 g CO2-C m−2 yr−1 (mean of −64.1 ± 33.6 g CO2-C m−2 yr−1). Inter-annual variability in NEE was positively correlated to the length of the growing season. Mean winter air temperature explained 87% of the inter-annual variability in the sink strength of the following summer, indicating an effect of winter climate on local phenology. Ecosystem respiration (Reco) was enhanced by drought, which also depressed gross primary productivity (GPP). The CO2 uptake rate during the growing season was comparable to three other sites with long-term NEE records; however, the emission rate during the dormant season was significantly higher. To summarise, the NEE of the peatland studied is modulated by two dominant factors: - phenology of the plant community, which is driven by winter air temperature and impacts photosynthetic potential and net CO2 uptake during the growing season (colder winters are linked to lower summer NEE), - water table level, which enhanced soil respiration and decreased GPP during dry spells. Although summer dry spells were sporadic during the study period, the positive effects of the current climatic trend towards milder winters on the site's CO2 sink strength could be offset by changes in precipitation patterns especially during the growing season.

scholarly journals Drivers of long-term variability in CO<sub>2</sub> net ecosystem exchange in a temperate peatland

2014 ◽  
Vol 11 (10) ◽  
pp. 14981-15018 ◽  
Author(s):  
C. Helfter ◽  
C. Campbell ◽  
K. J. Dinsmore ◽  
J. Drewer ◽  
M. Coyle ◽  
...  
Keyword(s):  
Carbon Sink ◽  
Ecosystem Respiration ◽  
Net Ecosystem Exchange ◽  
Growing Season ◽  
Sink Strength ◽  
Co2 Uptake ◽  
Annual Variability ◽  
Dormant Season ◽  
Carbon Dioxide Co2

Abstract. Land–atmosphere exchange of carbon dioxide (CO2) in peatlands exhibits marked seasonal and inter-annual variability, which subsequently affects the carbon sink strength of catchments across multiple temporal scales. Long-term studies are needed to fully capture the natural variability and therefore identify the key hydrometeorological drivers in the net ecosystem exchange (NEE) of CO2. NEE has been measured continuously by eddy-covariance at Auchencorth Moss, a temperate lowland peatland in central Scotland, since 2002. Hence this is one of the longest peatland NEE studies to date. For 11 yr, the site was a consistent, yet variable, atmospheric CO2 sink ranging from −5.2 to −135.9 g CO2-C m−2 yr−1 (mean of −64.1 ± 33.6 g CO2-C m−2 yr−1). Inter-annual variability in NEE was positively correlated to the length of the growing season. Mean winter air temperature explained 87% of the inter-annual variability in the sink strength of the following summer, indicating a phenological memory-effect. Plant productivity exhibited a marked hysteresis with respect to photosynthetically active radiation (PAR) over the growing season, indicative of two separate growth regimes. Ecosystem respiration (Reco) and gross primary productivity (GPP) were closely correlated (ratio 0.74), suggesting that autotrophic processes were dominant. Whilst the site was wet most of the year (water table depth <5 cm) there were indications that heterotrophic respiration was enhanced by drought, which also depressed GPP. NEE was compared to 5 other peatland sites which have published long-term NEE records. The CO2 uptake rate during the growing season was comparable to 3 other European sites, however the emission rate during the dormant season was significantly higher.

Tax debt as a threat to the economic security of the Russian Far East

2020 ◽  
Vol 13 (2) ◽  
pp. 216-242
Author(s):  
V.A. Yakimova ◽  
A.A. Orekhova
Keyword(s):  
Russian Far East ◽  
Consumer Price Index ◽  
Far East ◽  
Federal District ◽  
Economic Security ◽  
Factors Affecting ◽  
Correlation And Regression Analysis ◽  
Debt Collection ◽  
Far Eastern ◽  
The Russian Far East

Subject. The article addresses the tax liabilities of taxpayers registered in the subjects of the Far Eastern Federal District, which should be paid to the consolidated budget of the Russian Federation, as well as the factors of the said debt growth. Objectives. Our aim is to assess the level of tax debt of regions of the Russian Far East and identify the correlation between the factors and the amount of tax debt. Methods. The study rests on methods of analysis, generalization, grouping, systematization, and the correlation and regression analysis. Results. We analyzed the level of tax debt for the entire Far Eastern Federal District and by region, identified factors affecting the growth of tax debt therein. The paper assesses the structure of tax debt by type of taxes and activity of debtors. The unveiled factors may help control changes in the size of tax debt in the Russian Far East and develop effective measures to improve the debt collection. Conclusions. The study shows that there is an increase in the tax debt in the regions of the Russian Far East, in the VAT in particular. The factor analysis revealed that the volume of sales of wholesale enterprises, investment in fixed capital, the consumer price index have the largest impact on the amount of tax debt.

Preparation of Far Eastern Internal Affairs Agencies for Action under the Conditions of the Special Period in 1970-1972

2018 ◽  
pp. 463-474
Author(s):  
Vyacheslav Z. Dorokhov ◽  
◽  
Vladimir V. Sinichenko ◽  
Keyword(s):  
Secondary School ◽  
Far East ◽  
Road Transport ◽  
Public Order ◽  
Special Period ◽  
Radio Broadcasting ◽  
Close Cooperation ◽  
Internal Affairs ◽  
Council Of Ministers ◽  
Far Eastern

Drawing on unique documents that have not yet been introduced into scientific use, the article reviews the activities of the USSR Ministry of Internal Affairs in training its agencies for probable border war with China. A series of events was conducted by Shchelokov, Minister of the Internal Affairs of the USSR, in order to strengthen the regional internal affairs agencies. It included introduction of a list of ‘advanced alert,’ ‘special period,’ and ‘covert mobilization’ signals, accompanied by a list of mandatory positions. The article focuses on the work of internal affairs agencies in the Far East border areas and the Khabarovsk special secondary school of militia of the Ministry of Internal Affairs of the USSR in particular, all of which hurried to fine-tune public order and state security maintenance, evacuation of the population and the internal affairs bodies in case of onset of the Special Period. Significantly, the Khabarovsk special secondary school of militia of the Ministry of Internal Affairs of the USSR was to become not just a base for accelerated training of officers, but also a military reserve in case of enemy assault. It also was to enforce public order in case of mass riots. The manpower strength of the school allowed to form a battalion of 3 rifle companies. The author underscores that all measures implemented by the Ministry of Internal Affairs of the USSR were carried out in close cooperation with the KGB under the Council of Ministers of the USSR and its regional agencies. Training for Special Period was multifaceted, it included propaganda support via mass media, control over radio-broadcasting in the territories bordering China, camouflage of installations at the expense of the forest fund, mobilization by rail and road transport, etc.

scholarly journals Edible Far Eastern Ferns as a Dietary Source of Long-Chain Polyunsaturated Fatty Acids

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1220
Author(s):  
Eduard V. Nekrasov ◽  
Vasily I. Svetashev
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Russian Far East ◽  
Far East ◽  
Dry Weight ◽  
Pteridium Aquilinum ◽  
Fern Species ◽  
Vegetarian Diets ◽  
Far Eastern ◽  
Long Chain

Young fronds of ferns are consumed as a vegetable in many countries. The aim of this study was to analyze three fern species that are available for sale in the Russian Far East as dietary sources in terms of fatty acids that are important for human physiology: arachidonic acid (20:4n-6, ARA), eicosapentaenoic acid (20:5n-3, EPA) and other valuable long-chain polyunsaturated fatty acids. The content of ARA and EPA was 5.5 and 0.5 mg/g dry weight, respectively, in Pteridium aquilinum, 4.1 and 1.1 in Matteuccia struthiopteris, and 2.2 and 0.8 in Osmundastrum asiaticum. Salted fronds of P. aquilinum contained less these fatty acids than the raw fronds, with a decrease of up to 49% for ARA and 65% for EPA. These losses were less pronounced or even insignificant in dried fronds. Cooked ferns preserved significant portions of the long-chain polyunsaturated fatty acids: cooked P. aquilinum contained 4.4 mg/g dry weight ARA and 0.3 mg/g dry weight EPA. The ferns may provide a supplemental dietary source of these valuable long-chain polyunsaturated fatty acids, especially for vegetarian diets.

scholarly journals Modelling the productivity of Siberian larch forests from Landsat NDVI time series in fragmented forest stands of the Mongolian forest-steppe

2021 ◽  
Vol 193 (4) ◽  
Author(s):  
Stefan Erasmi ◽  
Michael Klinge ◽  
Choimaa Dulamsuren ◽  
Florian Schneider ◽  
Markus Hauck
Keyword(s):  
Climate Change ◽  
Time Series ◽  
Global Climate Change ◽  
Global Climate ◽  
Siberian Larch ◽  
Growing Season ◽  
Forest Productivity ◽  
Forest Steppe ◽  
Fragmented Forest ◽  
Southern Fringe

AbstractThe monitoring of the spatial and temporal dynamics of vegetation productivity is important in the context of carbon sequestration by terrestrial ecosystems from the atmosphere. The accessibility of the full archive of medium-resolution earth observation data for multiple decades dramatically improved the potential of remote sensing to support global climate change and terrestrial carbon cycle studies. We investigated a dense time series of multi-sensor Landsat Normalized Difference Vegetation Index (NDVI) data at the southern fringe of the boreal forests in the Mongolian forest-steppe with regard to the ability to capture the annual variability in radial stemwood increment and thus forest productivity. Forest productivity was assessed from dendrochronological series of Siberian larch (Larix sibirica) from 15 plots in forest patches of different ages and stand sizes. The results revealed a strong correlation between the maximum growing season NDVI of forest sites and tree ring width over an observation period of 20 years. This relationship was independent of the forest stand size and of the landscape’s forest-to-grassland ratio. We conclude from the consistent findings of our case study that the maximum growing season NDVI can be used for retrospective modelling of forest productivity over larger areas. The usefulness of grassland NDVI as a proxy for forest NDVI to monitor forest productivity in semi-arid areas could only partially be confirmed. Spatial and temporal inconsistencies between forest and grassland NDVI are a consequence of different physiological and ecological vegetation properties. Due to coarse spatial resolution of available satellite data, previous studies were not able to account for small-scaled land-cover patches like fragmented forest in the forest-steppe. Landsat satellite-time series were able to separate those effects and thus may contribute to a better understanding of the impact of global climate change on natural ecosystems.

State strategy for the accelerated development of the electric power industry in the Far East of the USSR (1964—1991): historical experience

2021 ◽  
pp. 5
Author(s):  
Aleksey Maklyukov
Keyword(s):  
Electric Power ◽  
Structural Changes ◽  
Far East ◽  
Electric Power Industry ◽  
Power Industry ◽  
Eastern Region ◽  
Regional Energy ◽  
The Far East ◽  
State Strategy ◽  
Far Eastern

The article examines the historical aspects of the formation and implementation of the state strategy for the accelerated growth of the electric power industry in the Far East of the USSR in 1964—1991. The problems of power supply of the Far Eastern region of the country are analyzed, programs for the development of the regional electric power industry are considered, the difficulties of their implementation are revealed, structural changes in the industry and the results of electrification of the region are characterized. The author notes that the problems of regional energy supply had not been solved until the end of the Soviet era. The Far Eastern electric power industry continued to be a costly and lagging industry, slowing down the socio-economic development of the region.

STECCHERINUM AURANTILAETUM (CORNER) BERNICCHIA ET GORJÓN (BASIDIOMYCOTA) IN THE FAR EAST OF RUSSIA

2021 ◽  
Vol 69 ◽  
Author(s):  
N.V. Bukharova ◽  
Keyword(s):  
Nature Reserve ◽  
East Asian ◽  
Far East ◽  
Original Description ◽  
General Distribution ◽  
Far East Of Russia ◽  
Autonomous Region ◽  
The Far East ◽  
Far Eastern ◽  
First Time

Steccherinum aurantilaetum is a predominantly East Asian polyporoid fungus from the Steccherinaceae. It was first discovered in the Krasnoarmeisky District of the Primorye and in the Khabarovsk Territory. Previously, it was known only in the «Kedrovaya Pad» Nature Reserve in the Primorye and in the «Bastak» Nature Reserve in the Jewish Autonomous Region (for the territory of Russia). An original description of the species based on Far Eastern material is given, and a map of the general distribution of S. aurantilaetum is presented for the first time.

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