Академическое издательство «Гео»

Keywords: landscape structure, background contents, soils, bottom sediments, accumulation, distribution.



GEOGRAPHY AND NATURAL RESOURCES, 2017, № 2, p. 46-55

Heavy metals in landscapes of raised bogs in Pskov oblast

Yu.A. Fedorov, T.M. Minkina, G.V. Shipkova

Southern Federal University, ul. Bol’shaya Sadovaya, 105/42, Rostov-on-Don, 344006, Russia,
fedorov@sfedu.ru, tminkina@mail.ru, galina_shipkova@mail.ru

We examine the characteristic features of accumulation and distribution of heavy metals in landscape components of raised bogs in Pskov oblast. Samples were collected during the summer-autumn period (end of June–beginning of September) of 2011–2013 on the territory of two study areas: the Polistovo-Lovatskaya bog system, and the Radilovskii bog massif. It is established that the study area is dominated by raised-bog peaty soils, significant among which are the pyrogenic soils with elevated ash content in the upper horizons caused by wildfires. The soils are mostly in a natural, anthropogenically undisturbed state. Relatively high contents of Fe, Zn and Ni were observed in all soil types, whereas elevated contents of some elements, such as Al, Mn and Cr, are observed largely in brown forest soils. We determined the regional background contents of heavy metals in raised-bog peaty soils of Pskov oblast: Ni — 1.9 mg/g, Cu — 1.2, Pb — 0.3, Zn — 9.0, Cd — 0.3, Mg — 20 mg/g, and Fe 0.018 %. It is found that the concentration of heavy metals in fire-affected soils increases, sometimes more than an order of magnitude, approaching in some elements to brown forest soils. The differentiation of heavy-metals contents in the profile is more clearly pronounced in brown forest soils and organogenic bottom sediments of rivers and lakes.

Keywords: landscape structure, background contents, soils, bottom sediments, accumulation, distribution.

DOI: 10.21782/GiPR0206-1619-2017-2(46-55)

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