Linear growth and production of Sphagnum mosses in the middle taiga zone of West Siberia

2017 ◽  
Vol 8 (1) ◽  
pp. 3-13
Author(s):  
N. P. Kosykh ◽  
N. G. Koronatova ◽  
E. D. Lapshina ◽  
N. V. Filippova ◽  
E. K. Vishnyakova ◽  
...  
Keyword(s):  
Linear Growth ◽  
West Siberia ◽  
Middle Taiga ◽  
Taiga Zone ◽  
Sphagnum Mosses

Приведены данные линейного прироста 3 видов мхов в средней тайге Западной Сибири, полученные за последние 3 года. Линейные приросты S. fuscum и S. magellanicum, растущих на повышенных элементах болотного микрорельефа, имеют сходную динамику, как по годам, так и по ключевым участкам, и зависят от годовой и летней суммы осадков. Средняя скорость прироста этих видов варьировала от 0.05 до 0.25 мм/день в зависимости от года исследования и ключевого участка. Прирост мочажинного вида S. balticum на 30% больше, чем линейный прирост мхов повышенных элементов микрорельефа, и имеет 2 пика – весенний и летний. Максимальная скорость прироста S. balticum приходится на летний период и составляет 0.55 мм/день, при средней скорости – 0.23 мм в день. Первичная продукция S. fuscum была выше продукции S. magellanicum, при этом продукция обоих видов различалась по годам и между ключевыми участками. Продукция S. magellanicum была наибольшей на западе региона, постепенно снижаясь к востоку.

scholarly journals The Multiscale Monitoring of Peatland Ecosystem Carbon Cycling in the Middle Taiga Zone of Western Siberia: The Mukhrino Bog Case Study

Land ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 824
Author(s):  
Egor Dyukarev ◽  
Evgeny Zarov ◽  
Pavel Alekseychik ◽  
Jelmer Nijp ◽  
Nina Filippova ◽  
...  
Keyword(s):  
Carbon Cycling ◽  
Western Siberia ◽  
Carbon Accumulation ◽  
Middle Taiga ◽  
Taiga Zone ◽  
Field Station ◽  
Moss Species ◽  
Chamber Method ◽  
The Impact

The peatlands of the West Siberian Lowlands, comprising the largest pristine peatland area of the world, have not previously been covered by continuous measurement and monitoring programs. The response of peatlands to climate change occurs over several decades. This paper summarizes the results of peatland carbon balance studies collected over ten years at the Mukhrino field station (Mukhrino FS, MFS) operating in the Middle Taiga Zone of Western Siberia. A multiscale approach was applied for the investigations of peatland carbon cycling. Carbon dioxide fluxes at the local scale studied using the chamber method showed net accumulation with rates from 110, to 57.8 gC m−2 at the Sphagnum hollow site. Net CO2 fluxes at the pine-dwarf shrubs-Sphagnum ridge varied from negative (−32.1 gC m−2 in 2019) to positive (13.4 gC m−2 in 2017). The cumulative May-August net ecosystem exchange (NEE) from eddy-covariance (EC) measurements at the ecosystem scale was −202 gC m−2 in 2015, due to the impact of photosynthesis of pine trees which was not registered by the chamber method. The net annual accumulation of carbon in the live part of mosses was estimated at 24–190 gC m−2 depending on the Sphagnum moss species. Long-term carbon accumulation rates obtained by radiocarbon analysis ranged from 28.5 to 57.2 gC m−2 yr−1, with local extremes of up to 176.2 gC m−2 yr−1. The obtained estimates of various carbon fluxes using EC and chamber methods, the accounting for Sphagnum growth and decomposition, and long-term peat accumulation provided information about the functioning of the peatland ecosystems at different spatial and temporal scales. Multiscale carbon flux monitoring reveals useful new information for forecasting the response of northern peatland carbon cycles to climatic changes.

scholarly journals Growth and Development of Introduced Larix Mill. Species in the Taiga Zone (Karelia)

2021 ◽  
pp. 61-83
Author(s):  
Ivan T. Kishchenko
Keyword(s):  
Plant Communities ◽  
Growth And Development ◽  
Growing Season ◽  
Botanical Garden ◽  
Larix Sibirica ◽  
Middle Taiga ◽  
Taiga Zone ◽  
State University ◽  
Residential Landscaping ◽  
Phenological Phases

The study reports results of research carried out from April to October during 1988–2016 at the Botanical Garden of Petrozavodsk State University (South Karelia, middle taiga subzones). Three introduced species of the genus Larix (Larix sibirica Ledeb., L. leptolepis (Sieb. et Zucc.) Gord, and L. dahurica Turcz. ex Trautv.) were studied. The growth of shoots and needles in different species begins, reaches its culmination, and ends almost simultaneously, differing by no more than one week across the species. L. sibirica shows the highest growth rate. The timing of growth, culmination, and the dynamics of growth of shoots and needles are largely determined by variations in precipitation, temperature, and humidity. The direction and strength of such an effect may vary from year to year. The dates of phenological phases of the Larix species studied here are chiefly determined by the air temperature in the current growing season and the dates of formation of wintering buds in the previous growing season. Bud swelling and opening begins almost simultaneously in the studied species. Most of the other phenological phases begin and end earliest in L. sibirica and latest in L. leptolepis. All the studied species, primarily L. sibirica, are promising for residential landscaping and creation of artificial plant communities in Karelia

scholarly journals Net ecosystem exchange and energy fluxes in a West Siberian bog

2017 ◽  
Author(s):  
Pavel Alekseychik ◽  
Ivan Mammarella ◽  
Dmitry Karpov ◽  
Sigrid Dengel ◽  
Irina Terentieva ◽  
...  
Keyword(s):  
Net Ecosystem Exchange ◽  
Bowen Ratio ◽  
Heavy Rain ◽  
West Siberia ◽  
Weather Conditions ◽  
Middle Taiga ◽  
Energy Budgets ◽  
Co2 Uptake ◽  
Surface Exchange ◽  
Rainy Weather

Abstract. Very few studies of ecosystem-atmosphere exchange involving eddy-covariance data have been conducted in Siberia, and none in West Siberia. This work provides the first estimates of carbon dioxide (CO2) and energy budgets at a typical bog of the West Siberian middle taiga based on May-August measurements in 2015. The footprint of measured fluxes consisted of homogeneous mixture of tree-covered ridges and hollows with the vegetation represented by typical sedges and shrubs. Generally, the surface exchange rates resembled those of pine-covered bogs elsewhere. The surface energy balance closure was 90 %. Net CO2 uptake was comparatively high, summing up to 196 gC m−2 for the four measurement months, while the Bowen ratio was typical at 30 %. The ecosystem turned into a net CO2 source during several front passage events in June and July. Several periods of heavy rain helped keep the water table at a constant level, preventing a usual drawdown in summer. However, because of the cloudy and rainy weather, the observed fluxes might rather represent the special weather conditions of 2015 than their typical level.

New Potato Cultivars and Hybrids Recommended for Cultivation in the Middle Taiga Zone of Northeastern Europe

2019 ◽  
Vol 45 (2) ◽  
pp. 124-127
Author(s):  
N. T. Chebotarev ◽  
A. A. Yudin ◽  
P. I. Konkin ◽  
A. V. Oblizov
Keyword(s):  
Potato Cultivars ◽  
Middle Taiga ◽  
Taiga Zone ◽  
Northeastern Europe

scholarly journals Variability in methane emissions from West Siberia's shallow boreal lakes on a regional scale and its environmental controls

2017 ◽  
Vol 14 (15) ◽  
pp. 3715-3742 ◽  
Author(s):  
Aleksandr F. Sabrekov ◽  
Benjamin R. K. Runkle ◽  
Mikhail V. Glagolev ◽  
Irina E. Terentieva ◽  
Victor M. Stepanenko ◽  
...  
Keyword(s):  
Pore Space ◽  
Regional Scale ◽  
Methane Emissions ◽  
Southern Taiga ◽  
Boreal Lakes ◽  
Middle Taiga ◽  
Taiga Zone ◽  
Power Law Distribution ◽  
Small Lakes ◽  
Environmental Controls

Abstract. Small lakes represent an important source of atmospheric CH4 from northern wetlands. However, spatiotemporal variations in flux magnitudes and the lack of knowledge about their main environmental controls contribute large uncertainty into the global CH4 budget. In this study, we measured methane fluxes from small lakes using chambers and bubble traps. Field investigations were carried out in July–August 2014 within the West Siberian middle and southern taiga zones. The average and median of measured methane chamber fluxes were 0.32 and 0.30 mgCH4 m−2 h−1 for middle taiga lakes and 8.6 and 4.1 mgCH4 m−2 h−1 for southern taiga lakes, respectively. Pronounced flux variability was found during measurements on individual lakes, between individual lakes and between zones. To analyze these differences and the influences of environmental controls, we developed a new dynamic process-based model. It shows good performance with emission rates from the southern taiga lakes and poor performance for individual lakes in the middle taiga region. The model shows that, in addition to well-known controls such as temperature, pH and lake depth, there are significant variations in the maximal methane production potential between these climatic zones. In addition, the model shows that variations in gas-filled pore space in lake sediments are capable of controlling the total methane emissions from individual lakes. The CH4 emissions exhibited distinct zonal differences not only in absolute values but also in their probability density functions: the middle taiga lake fluxes were best described by a lognormal distribution while the southern taiga lakes followed a power-law distribution. The latter suggests applicability of self-organized criticality theory for methane emissions from the southern taiga zone, which could help to explain the strong variability within individual lakes.

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