[Content of heavy metals in pine phytocenoses on Al-Fe humus sand soils]
2000
Romanova, M.L. | Mavrishchev, V.V. (Experimental Botany Inst.named after V.F.Kuprevich of Acad.of Sciences, Minsk (Belarus))
Content of heavy metals (HM - Ni, Cu, Pb, Zn), as well as Al and Fe is considered in modern dynamics of wood phytocenoses. In Berezinsky Biosphere reserve (BBR) a series of objects - catena from top of a hill up to a high bog was studied. Four permanent sampling plots (PSP) have a series of soil types on ancient alluvial sands: 1) lichen pine forest with Pleurozium, Dicranum, Hylocomium on gray-brown podzolic soil (dystric luvisol); 2) pine forest with Calluna vulgaris, Pleurozium, Dicranum, Hylocomium on the gray-brown gley podzolic soil (distric podzoluvisol); 3) bilberry moss pine forest with Pleurozium, Dicranum, Hylocomium on alfegumic podzol soil (podzol); 4) moss-bildtrry pine forest with Pleurozium, Dicranum, Hylocomium, Vaccinium myrtillus on alfegumic gley-podzol soil (gley-podzol). As a model kind of species oligotrophic mesophyt Pleurozium schreberi is selected as most widespread in pine associations. It has been established that mosses and litters of pine forests of BBR can be reliable objects for monitoring and standards describing the content of heavy metals in uncontaminated biogeocenoses. The content of HM in litters both by seasons and by soils is a little bit higher than in mosses, that allows to consider litters as the main biogeochemical barrier impeding infiltration HM in soils and groundwaters. The soils with minimum rate of moisture most vividly show contamonation of pine biogeocoenosis HM, arrested by mosses and litters. The gross content HM during the greatest anthropogenic press in Pleurozium shcreberi, litters and Al-Fe humus sand soils BBR did not exceed maximum permissible concentration (MPC). The exception was made by lead. This fact needs aditional research
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