scholarly journals Structure of the organic matter pool in Pinus sibirica dominated forests of Central Siberia

2015 ◽  
Vol 57 (4) ◽  
pp. 218-223 ◽  
Author(s):  
Nataly N. Koshurnikova ◽  
Sergey V. Verkhovets ◽  
Olga A. Antamoshkina ◽  
Nataly V. Trofimova ◽  
Lyudmila.V. Zlenko ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dead Wood ◽  
Woody Debris ◽  
Pinus Sibirica ◽  
Yenisei River ◽  
Central Siberia ◽  
Growing Stock ◽  
Common Trend ◽  
Organic Matter Pool ◽  
The Yenisei River

Abstract Organic matter pool and its distribution between growing stock, dead wood and windfall in upland and lowland Pinus sibirica dominated forests of Central Siberia (along the Yenisei River) is evaluated. The average growing stock is changing with advancing age from 163.9 ± 20.4 to 295.4 m3 ha−1 thus reaching its maximum in the mature forests (337.0 ± 19.6 m3 ha−1). According to the data collected, stock variation coefficient numbers display acceptable (growing stock: 14–28%) and high variability (windfall and dead wood: 63–85%). Windfall prevails in the structure of coarse woody debris (CWD) from 130.8 ± 18.5 to 171.7 ± 20.1 m3 ha−1, with the stocks greatly exceeding the amount of growing wood stock in middle-aged and declining stands in 1.4 and 2.1 times, respectively. The observations comply with common trend of deterioration of dark coniferous forests in Siberia.

Water moss as a food item of the zoobenthos in the Yenisei River

2011 ◽  
Vol 6 (2) ◽  
pp. 236-245 ◽  
Author(s):  
Galina Kalachova ◽  
Michail Gladyshev ◽  
Nadezhda Sushchik ◽  
Olesia Makhutova
Keyword(s):  
Organic Matter ◽  
Yenisei River ◽  
Fontinalis Antipyretica ◽  
Supplemental Food ◽  
Epilithic Biofilms ◽  
The Yenisei River ◽  
Main Food Source ◽  
A Minor ◽  
Acetylenic Acids ◽  
Isotope Analyses

AbstractBryophytes are abundant in streams and are a habitat for many invertebrates, but their contribution to the diet of fluvial zoobenthos is still debated. To estimate the amount of bryophyte-derived organic matter assimilated by benthic invertebrates, we used a combination of fatty acid and stable isotope analyses during a four-year monthly study of a littoral site in the Yenisei River (Siberia, Russia). Acetylenic acids, which are highly specific biomarkers of the water moss Fontinalis antipyretica, were found in lipids of all dominant benthic animals: gammarids, ephemeropterans, chironomids and trichopterans. The dominant zoobenthic species, Eulimnogammarus viridis, had maximum levels of the biomarkers in its biomass during winter, and minimum levels in summer. The zoobenthos in the studied site regularly consume and assimilate bryophyte-derived organic matter as a minor supplemental food. This consumption increases in winter, when the main food source of the zoobenthos, epilithic biofilms, are probably scarce.

FODDER VALUE OF CERVINE PASTURES OF A LEFT BANK OF THE YENISEI RIVER

2018 ◽  
Vol 1 (1) ◽  
pp. 54-59
Author(s):  
Z. A. YANCHENKO ◽  
◽  
S. N. FILATOVA ◽  
Keyword(s):  
Left Bank ◽  
Yenisei River ◽  
The Yenisei River

DISTRIBUTION OF DISSOLVED CHEMICAL ELEMENTS IN THE YENISEI RIVER ESTUARY AND ADJACENT WATER AREA OF THE KARA SEA

2017 ◽  
Author(s):  
Alla Savenko ◽  
Alla Savenko ◽  
Oleg Pokrovsky ◽  
Oleg Pokrovsky ◽  
Irina Streletskaya ◽  
...  
Keyword(s):  
Trace Elements ◽  
River Runoff ◽  
Major Ions ◽  
Chemical Elements ◽  
River Estuary ◽  
Water Area ◽  
Kara Sea ◽  
Yenisei River ◽  
Adjacent Water ◽  
The Yenisei River

The distribution of dissolved chemical elements (major ions, nutrients, and trace elements) in the Yenisei River estuary and adjacent water area in 2009 and 2010 are presented. These results were compared to the data obtained during previous hydrochemical studies of this region. The transport of major cations (Na, K, Mg, Ca) and some trace elements (Rb, Cs, Sr, B, F, As, Mo, U) in the estuary follows conservative mixing. Alkalinity also belongs to conservative components, however this parameter exhibits substantial spatial heterogeneity caused by complex hydrological structure of the Yenisei Bay and adjoining part of the Kara Sea formed under the influence of several sources of desalination and salty waters inflow. Concentrations of Pmin, Si, and V in the desalinized waters of photic layer decrease seaward owing to uptake by phytoplankton. The losses of these elements reach 30–57, 30, and 9% of their supply by river runoff, respectively. The content of dissolved phosphates and vanadium in the intermediate and near-bottom layers of the Yenisei River estuary strongly increases with salinity due to regeneration of precipitated organic matter, whereas silica remineralization is much less pronounced. Barium is characterized by additional input of dissolved forms in the mixing zone in the quantity comparable to that carried out by river runoff. This may be caused by its desorption from river suspended matter due to ion exchange. The transport of dissolved Al and Mn in the estuarine zone is probably controlled by the coagulation and flocculation of organic and organomineral colloids, which is indicated by a decrease in the concentration of these elements at the beginning of the estuary (31 and 56%, respectively) followed by a stable concentration further seaward.

scholarly journals Impact of soil use on aggregate stability and its relationship with soil organic carbon at two different altitudes in the Colombian Andes

2019 ◽  
Vol 37 (3) ◽  
pp. 263-273
Author(s):  
Efraín Francisco Visconti-Moreno ◽  
Ibonne Geaneth Valenzuela-Balcázar
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Aggregate Stability ◽  
Tropical Climate ◽  
Mineral Particle ◽  
Organic Carbon Content ◽  
Rice Soils ◽  
Organic Matter Pool ◽  
Different Altitudes

The stability of soil aggregates depends on the organic matter, and the soil use and management can affect the soil organicmatter (SOM) content. Therefore, it is necessary to know therelationship between aggregate stability and the content of SOMin different types of soil use at two different altitudes of theColombian Andes. This study examined the conditions of soilaggregate stability expressed as a distribution of the size classes of stable aggregates (SA) and of the mean weighted diameter of the stable aggregates (MWD). To correlate these characteristics with the soil organic carbon (OC), we measured the particulate organic matter pool (POC), the OC associated with the mineral organic matter pool (HOC), the total organic carbon content (TOC), and the humification rate (HR). Soils were sampled at two altitudes: 1) Humic Dystrudepts in a cold tropical climate (CC) with three plots: tropical mountain rainforest, pastures, and crops; 2) Fluvaquentic Dystrudepts in a warm tropical climate (WC) with three plots: tropical rainforest, an association of oil palm and pastures, and irrigated rice. Soils were sampled at three depths: 0-5, 5-10 and 10-20 cm. The physical properties, mineral particle size distribution, and bulk density were measured. The content of SA with size>2.36 mm was higher in the CC soil (51.48%) than in the WC soil (9.23%). The SA with size 1.18-2.36 mm was also higher in the CC soil (7.78%) than in the WC soil (0.62%). The SA with size 0.60-1.18 mm resulted indifferent. The SA with size between 0.30 and 0.60 mm were higher in the WC soil (13.95%) than in the CC soil (4.67%). The SA<0.30 mm was higher in the WC soil (72.56%) than in the CC soil (32.15%). It was observed that MWD and the SA>2.36 mm increased linearly with a higher POC, but decreased linearly with a higher HR. For the SA<0.30 mm, a linear decrease was observed at a higher POC, while it increased at a higher HR.

scholarly journals Estimates of Forest Growing Stock Volume for Sweden, Central Siberia, and Québec Using Envisat Advanced Synthetic Aperture Radar Backscatter Data

2013 ◽  
Vol 5 (9) ◽  
pp. 4503-4532 ◽  
Author(s):  
Maurizio Santoro ◽  
Oliver Cartus ◽  
Johan Fransson ◽  
Anatoly Shvidenko ◽  
Ian McCallum ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Synthetic Aperture ◽  
Radar Backscatter ◽  
Central Siberia ◽  
Growing Stock ◽  
Stock Volume ◽  
Aperture Radar
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