Abstract
The process of natural remediation of oil- and soil-contaminated raised bogs reclaimed 14–16 years ago in Khanty-Mansiysk Autonomous Okrug–Yugra (KHMAO–Yugra) is analyzed. Revegetation is generally successful, although mesophytic grasses sown during reclamation almost completely disappeared in the grass stand. There is a gradual desalination of peat soil in salt-contaminated areas; it is accompanied by a succession change of halophytic (hemihalophytic) vegetation by communities that dominated by Calamagrostis epigeios, Eriophorum angustifolium, and Phragmites australis; a certain contribution is also made by sphagnum, green mosses, and liverworts. A characteristic feature of these habitats is the colonizing by a number of rare protected species (Heterogemma laxa, Thelypteris palustris, and Triglochin maritimum). In oil-contaminated bogs, hydrocarbons often enter from the underlying peat soil horizons during revegetation, resulting in the formation of a surface crust. Under these conditions, grass–sedge–cotton-grass and other communities are replaced by grass stands of Eriophorum angustifolium and some other species with strong root systems. A certain role in the overgrowth of crusted surfaces is also played by mosses (Sphagnum riparium, Warnstorfia fluitans, etc.). Unsuccessful restoration is observed in hollows with restricted runoff for salt-contaminated bogs and in most significantly drained segments for oil-contaminated ones.
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Funding
This study was partly performed within the framework of the research topics: “Productivity of Agroecosystems and Its Relationship with the Dynamics of Soil Fertility,” no. 116020350086-4; “Land Use and Soil Mapping Based on Geographic Information Systems,” no. 115122210043; and a grant of the Ministry of Education and Science of Russia (agreement no. 05.607.21.0302).
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Conflict of interests. The authors declare that they have no conflicts of interest.Statement on the welfare of humans or animals. This article does not contain any studies involving animals performed by any of the authors.
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Translated by D. Zabolotny
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Shishkonakova, E.A., Trofimov, S.Y., Avetov, N.A. et al. Restoration of Raised Bogs in the Khanty-Mansiysk Ob Region after Reclamation of Oil- and Salt-Polluted Peat Soils in 2003–2005. Moscow Univ. Soil Sci. Bull. 75, 123–130 (2020). https://doi.org/10.3103/S0147687420030059
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DOI: https://doi.org/10.3103/S0147687420030059