Vol 4, No 1 (2013)

Cover Page
Articles
Diphosphine-based hypothesis of wetland autoignition is not confirmed
Glagolev M.V., Kleptsova I.E.
Abstract

The paper examine diphosphine-based hypothesis of wetland autoignition: it supposes that Р2Н4 production in
wetlands is sufficient to Р2Н4 spontaneous ignition in air which starts a chain reaction of phosphine and then methane
ignition; the latter reaction is considered as a real cause of many natural forest and peat fires. The paper demonstrates
that Р2Н4 autoignition under the natural conditions is hardly probable. We revealed that experimental data doesn't
indicate any significant diphosphine concentrations in wetlands. Even if diphosphine autoignition was proceeded,
surrounding gas mixture wouldn't sustain a combustion owing to the lack of oxidant (O2) in a peat layer or to a lower
comparing to a combustion limit Р2Н4 concentration in a surface layer. Even if under some unique conditions a shortterm
flash was occured, it wouldn't set fire to the peat layer.
The paper was written basing on the lecture of the same name delivered in MSU workshop «Greenhouse gases:
urgent questions» by one of the author.

Environmental Dynamics and Global Climate Change. 2013;4(1):1-25
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Production and destruction processes in peatland ecosystems of Vasyugan region
Mironycheva-Tokareva N.P., Kosykh N.P., Vishnykova E.K.
Abstract
Phytomass increase and death are the main processes that are aimed at studying the carbon cycle in ecosystems. Using the experimental data growth and decomposition of plant material obtained on key parts of the bogs of the southern taiga of Western Siberia, an attempt was made to determine the carbon balance in wetland ecosystems. In the center Bakchar’s bog (56˚48.804'N, 82˚51.300'E) on the height of 153 m a.s.l. are the main vegetation communities: pine-dwarf shrub-sphagnum ridge, beak rush-sphagnum and sedge-sphagnum oligotrophic hollows, which form a ridge-hollow complex. At the height of 126 m a.s.l., 6 km from the first key area (56˚51.186'N, 82˚50.836'E) are of common pine-dwar shrub-sphagnum ryam, dwarf shrub-cotton grass-sphagnum and sedge-sphagnum mesotrophic fens. In the 6 wetland ecosystems (raised bog, transitional dwarf shrub-sphagnum and sedge-sphagnum mesotrophic fens, ridges and oligotrophic hollows) was determined biomass stocks and net primary production. Stocks living phytomass in wetland ecosystems Bakchar’s bog high and vary from 860 to 1710 gC/m 2. Production varies on an even larger extent than by ecosystem type, and range (125-790 gC/m 2 per year). The more net primary production, the more loss-decomposition. Formed during the growing season plant material in the first year loses the decomposition from 8 to 27% of the net primary production that is 14 to 106 gC/m 2 depending on the type of ecosystem and the higher production, the faster the rate of decomposition. For further decomposition and transition in the peat remains to 420 gC/m 2 plant material in more productive wetland ecosystems ryams and mesotrophic fens, and 140 gC/m 2 in poor oligotrophic hollows. The remaining amount is further decomposition.
Environmental Dynamics and Global Climate Change. 2013;4(1):1-9
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Wood decay community of raised bogs in West Siberia
Filippova N.V., Zmitrovich I.V.
Abstract
Inventory of wood decay community of raised bogs was started in taiga zone of West Siberia (near the Khanty-Mansiysk town). We examined dead wood of Pinus sylvestris which creates substantial biomass in treed Pine - dwarfshrubs - Sphagnum ombrotrophic communities. 49 species of larger fungi from five groups (corticioid, polyporoid, heterobasidiomycetous, agaricoid, clavarioid basidiomycetes, and discomycetes) were registered by direct observation of fruit bodies. Inhabited substrates were: partly buried in sphagnum decorticated logs, stumps, butts of standing logs, and bark. Only one publication about wood decay fungi on Pinus sylvestris in the region was previously concerned with bog wood, species lists of two studies only partly coincide. 13 identified species represent new records for the region, three of them with a few collections in Russia. Two xerotolerant species were registered regularly on bog wood ( Amyloporia xantha, Sistotremastrum suecicum ). Some species represented by several collections: Coniophora arida, Peniophorella praetermissa, Phlebiella pseudotsugae, Piloderma byssinum, and Dacrymyces stillatus . Major part of the list (43 species) were collected once and twice. Large part of species from the list are adapted for decomposition of wide spectrum of coniferous and deciduous trees and also reported on mosses, and miscellaneous substrates of soil litter. Six species cause brown rot type, 23 species are white rotters, discomycetes cause poor decomposition (soft rot), and six corticioid species form mycorrhiza with Pine . Other authors have showed ability of wood decomposers to cause weight loss of Sphagnum peat, propagules of Antrodia and Gloeophyllum were isolated from peat. This confirmed in our study: eight corticioid species were registered on peaty substrates adjoining wood surfaces, and two species were growing on living Sphagnum in absence of wood.
Environmental Dynamics and Global Climate Change. 2013;4(1):1-16
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Novoe otechestvennoe issledovanie potokov SO 2 v prizemnom sloe atmosfery metodom mikrovikhrevykh pul'satsiy
Glagolev M.V.
Abstract

Для средних и высоких широт Северного полушария леса и болота являются доминирующими типами растительного покрова [Ваганов и др., 2005]. ...

Environmental Dynamics and Global Climate Change. 2013;4(1):1-12
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