THE INFLUENCE OF AERIAL EMISSIONS OF CEMENT PRODUCTION ON THE CHEMICAL AND BIOLOGICAL PROPERTIES OF FROZEN FOREST SOILS IN CENTRAL YAKUTIA (EASTERN SIBERIA, RUSSIA)

2017 ◽  
Author(s):  
Marina Shchelchkova
Keyword(s):  
Forest Soils ◽  
Biological Properties ◽  
Eastern Siberia ◽  
Cement Production ◽  
Central Yakutia

IMPACT OF WINDTHROWS DISTURBANCE ON CHEMICAL AND BIOLOGICAL PROPERTIES OF THE FOREST SOILS FROM ROMANIA

2021 ◽  
Vol 20 (7) ◽  
pp. 1163-1172
Author(s):  
Aurelia Onet ◽  
Vlad Emil Crisan ◽  
Lucian Constantin Dinca ◽  
Cosmin Ion Braga ◽  
Raluca Elena Enescu ◽  
...  
Keyword(s):  
Forest Soils ◽  
Biological Properties

Interannual environmental-soil thawing rate variation and its control on transpiration from Larix cajanderi, Central Yakutia, Eastern Siberia

2007 ◽  
Vol 338 (3-4) ◽  
pp. 251-260 ◽  
Author(s):  
M.L. Lopez C ◽  
H. Saito ◽  
Y. Kobayashi ◽  
T. Shirota ◽  
G. Iwahana ◽  
...  
Keyword(s):  
Rate Variation ◽  
Eastern Siberia ◽  
Central Yakutia ◽  
Larix Cajanderi ◽  
Thawing Rate

Snowmelt and the hydrological interaction of forest-grassland ecosystems in Central Yakutia, eastern Siberia

2015 ◽  
Vol 29 (14) ◽  
pp. 3074-3083 ◽  
Author(s):  
M. L. Lopez Caceres ◽  
F. Takakai ◽  
G. Iwahana ◽  
A. N. Fedorov ◽  
Y. Iijima ◽  
...  
Keyword(s):  
Eastern Siberia ◽  
Central Yakutia ◽  
Grassland Ecosystems

scholarly journals Impact of water erosion on the properties of forest soils

2021 ◽  
Vol 13 (2) ◽  
pp. 10921
Author(s):  
Ayoub ALLAM ◽  
Amine H. BORSALI ◽  
Abdelkrim KEFIFA ◽  
Mohamed ZOUIDI ◽  
Anne M. FARNET DA SILVA ◽  
...  
Keyword(s):  
Forest Soils ◽  
Research Work ◽  
Chemical Properties ◽  
Water Erosion ◽  
Negative Influence ◽  
Biological Properties ◽  
Basal Respiration ◽  
Control Zone ◽  
Physicochemical And Biological Properties ◽  
And Control

The research work was conducted on eroded soil in the Keroua forest of Saida, Algeria, whose objective is to know the changes in the physicochemical and biological properties of forest soils subjected to the effect of water erosion. The samples were taken to a depth between 0-10 cm in each zone (eroded zone and control zone). Our results show that the biological properties are the most affected by water erosion where there was a significant decrease in basal respiration and microbial biomass, which had a negative influence on the metabolic quotient (higher values in the eroded area). For chemical properties, there was an increase in organic matter and total limestone, while the pHWater decreased in the eroded zone. For the physical properties. We raised a slight difference between the two areas, but which was not statistically significant.

scholarly journals Effect of Fires on Certain Properties of Forest Soils in Western Algeria

2020 ◽  
Vol 23 (3) ◽  
pp. 111-117
Author(s):  
Ayoub Allam ◽  
Amine Habib Borsali ◽  
Abdelkrim Kefifa ◽  
Mohamed Zouidi ◽  
Raphael Gros
Keyword(s):  
Forest Soils ◽  
Forest Fires ◽  
Arid Zone ◽  
Chemical Properties ◽  
Biological Properties ◽  
Basal Respiration ◽  
Arid Ecosystems ◽  
Control Zone ◽  
The Impact ◽  
Semi Arid

AbstractNatural disturbances, such as forest fires, cause significant changes in the structure and functioning of semi-arid ecosystems. After such disturbances, the impact on the soil ecosystem in its entirety is misunderstood. In this study, two years after the last fire, changes in the physicochemical and biological properties of Aleppo pine forest soils in the semi-arid zone were observed. Among all physical properties analysed, only the soil moisture remained significantly lower in the burnt zone in contrast to control zone. Considering the chemical properties, the only negatively affected parameter is the rate of organic matter. In terms of biological properties, results showed that the fire caused a significant decrease in soil microorganisms by decreasing basal respiration and microbial biomass. Conversely, the metabolic quotient recorded higher values in the fire zone than in the control zone. These results indicate that microbial communities in semi-arid soils, already stressed by climatic hazards, are very sensitive to the passage of even low-intensity fires.

Carbon cycle of permafrost transect: main terrestrial and hydrological ecosystems of Eastern Siberia

2020 ◽  
Author(s):  
Trofim Maximov ◽  
Han Dolman ◽  
Ayumi Kotani ◽  
Per Anderson ◽  
Ayaal Maksimov ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Carbon Cycle ◽  
Growing Season ◽  
Larch Forest ◽  
Eddy Correlation ◽  
Northeastern Russia ◽  
Eastern Siberia ◽  
Lena River ◽  
Central Yakutia ◽  
Siberian Forests

<p>Almost 65% of Siberian forests and 23% of tundra vegetation grow in permafrost zone. According to our estimate, carbon stocks in the soils of forest and tundra ecosystems of Yakutia (Eastern Siberia, Russia) amount to 17 billion tons (125.5 million hectares of forest and 37 million hectares of tundra in total) that is about 25% of total carbon resource in the forest soils of the Russian Federation.<br>This presentation is compiled from the results of many years time series investigations conducted on the study of carbon cycle in permafrost-dominated forests with different productivity and typical tundra and along Great Lena river basin including Aldan and Viluy tributaries. <br>Seasonal photosynthesis maximum of forest canopy vegetation in dry years falls into June, and in humid ones – into July. During the growing season the woody plants of Yakutia uptake from 1.5 to 4.0 t C ha<sup>-1</sup> season<sup>-1</sup> depending on water provision. Night respiration is higher in dry and extremely dry years (10.9 and 16.1% respectively). The productive process of tree species in Eastern Siberia is limited by endogenous (stomatal conductance) and exogenous (provision with moisture and nutrients, nitrogen specifically) factors. The increase of an atmospheric precipitation after long 2-3 annual droughts accompanied with strong surge in photosynthetic activity of forest plants is almost 2.5 times. <br>The temperature of soil is a key factor influencing soil respiration in the larch forests. Average soil respiration for the growing season comes to 6.9 kg C ha<sup>-1</sup> day<sup>-1</sup>, which is a characteristic of Siberian forests. Annual average soil emission is 4.5±0.6 t C ha<sup>-1</sup> yr<sup>-1</sup>.<br>As our multi-year studies showed, there is significant interannual NEE variation in the Central Yakutia larch forest, while in the Southern Yakutia  larch forest and tundra ecosystem variation is more smooth, because the climatic conditions in these zones (close to the mountain and sea)  are less changeable than in sharply continental Central Yakutia. <br>According to our long-term eddy-correlation data, the annual uptake of carbon flux (NEE) in the high productivity larch forest of South eastern Yakutia, 60N – 2.43±0.23 t C ha<sup>-1</sup> yr<sup>-1</sup>, in the moderate productivity larch forest of the Central Yakutia, 62N makes 2.12±0.34 t C ha<sup>-1</sup> yr<sup>-1</sup> and in the tundra zone, 70N – 0.75±0.14 t C ha<sup>-1</sup> yr<sup>-1</sup>.<br>Interannual variation of carbon fluxes in permafrost forests in Northeastern Russia (Yakutia) makes 1.7-2.4 t C ha<sup>-1</sup> yr<sup>-1</sup> that results in the upper limit of annual sequestering capacity of 450-617 Mt C yr<sup>-1</sup>. In connection with climate warming there is a tendency of an increase in the volume of carbon sequestration by tundra and as opposed to decrease by forest ecosystem in the result of prolongation of the growing season and changing of plant successions.  This is also supported by changes in land use as well as by CO<sub>2</sub> sequestration in the form of fertilizer. <br>According our biogeochemical investigation annual flux of carbon from main in Eastern Siberia Lena river hydrological basin is almost 6.2 Mt C yr<sup>-1</sup> including 28% at Aldan and 14% at Viluy rivers.</p>

scholarly journals Seasonal patterns in greenhouse gas emissions from thermokarst lakes in Central Yakutia (Eastern Siberia)

2020 ◽  
Author(s):  
Lara Hughes‐Allen ◽  
Frédéric Bouchard ◽  
Isabelle Laurion ◽  
Antoine Séjourné ◽  
Christelle Marlin ◽  
...  
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Seasonal Patterns ◽  
Eastern Siberia ◽  
Gas Emissions ◽  
Thermokarst Lakes ◽  
Central Yakutia

scholarly journals Thermokarst Landscape Development Detected by Multiple-Geospatial Data in Churapcha, Eastern Siberia

2021 ◽  
Vol 9 ◽  
Author(s):  
Yoshihiro Iijima ◽  
Takahiro Abe ◽  
Hitoshi Saito ◽  
Mathias Ulrich ◽  
Alexander N. Fedorov ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Spatial Information ◽  
Surface Subsidence ◽  
Integrated Analysis ◽  
Permafrost Degradation ◽  
Eastern Siberia ◽  
Geospatial Information ◽  
Gis And Remote Sensing ◽  
The Past ◽  
Central Yakutia

Thermokarst is a typical process that indicates widespread permafrost degradation in yedoma landscapes. The Lena-Aldan interfluvial area in Central Yakutia in eastern Siberia is now facing extensive landscape changes with surface subsidence due to thermokarst development during the past few decades. To clarify the spatial extent and rate of subsidence, multiple spatial datasets, including GIS and remote sensing observations, were used to analyze the Churapcha rural locality, which has a typical yedoma landscape in Central Yakutia. Land cover classification maps for 1945 and 2009 provide basic information on anthropogenic disturbance to the natural landscape of boreal forest and dry grassland. Interferometric synthetic aperture radar (InSAR) with ALOS-2/PALSAR-2 data revealed activated surface subsidence of 2 cm/yr in the disturbed area, comprising mainly abandoned agricultural fields. Remote sensing with an unmanned aerial system also provided high-resolution information on polygonal relief formed by thermokarst development at a disused airfield where InSAR analysis exhibited extensive subsidence. It is worth noting that some historically deforested areas have likely recovered to the original landscape without further thermokarst development. Spatial information on historical land-use change is helpful because most areas with thermokarst development correspond to locations where land was used by humans in the past. Going forward, the integrated analysis of geospatial information will be essential for assessing permafrost degradation.

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