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Katarzyna Kowalczewska-Madura, Renata Dondajewska and Ryszard Gołdyn

References Brzozowska R., Dunalska J., Zdanowski B., 2005, Preliminary characteristics of the chemical composition of the top-layer bottom deposits in Lake Dejguny (Mazurskie Lake District), Limnol. Rev. 5: 11-16. Brzozowska R., Dunalska J., Zdanowski B., 2007, Chemical composition of the sacrificial sediments in Lake Licheńskie, Arch. Pol. Fish. 15 (4): 445-455. Brzozowska R., Gawrońska H., 2006, Effect of the applied restoration techniques on the content of organic matter in the

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Amir Faraz Ghasemi, Armin Jam, Mehrshad Taheri and Maryam Foshtomi

Abstract

Seasonal and inter-annual variations in the density of the invasive polychaete Streblospio gynobranchiata were noted in the south Caspian Sea when sediment conditions were examined at five and 14 meters depths in 2005 and 2010. There was no clear trend in changing density in line one but in line two, in all seasons except summer, density of S. gynobranchiata decreased significantly. Maximum densities of 2,040 ind./m−2 and 1,013 ind./m−2 were obtained in 2005 and 2010, respectively. Although the percentage of total organic matter as a food resource increased from 2005 to 2010, the density of S. gynobranchiata decreased slightly in the same period. It seems that in this invasion phase the population of S. gynobranchiata has decreased to a balance condition. There is evidence that the changing density of this species is also being affected by other biotic/abiotic factors like intra/interspecific competitors and pollutants.

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Alicja Szwed and Justyna Bohacz

References [1] Albiach, R., Canet, R., Pomares, F. & Ingelmo, F. (2000). Microbial biomass content and enzymatic activities after the application of organic amendments to horticultural soil, Bioresource Technology , 75, 43–48. [2] Aon, M.A. & Colaneri, A.C. (2001). Temporal and spatial evolution of enzymatic activities and physico-chemical properties in an agricultural soil, Applied Soil Ecology , 18, 255–270. [3] Boulter, J.I., Boland, G.J. & Trevors, J.T. (2000). Compost: A study of the development process and end-product potential for suppression

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Māris Kļaviņš, Ilga Kokorīte and Valērijs Rodinovs

litter grown under elevated atmospheric CO 2 . Soil Biol. Biochem. , 39 , 1759-1769. Hejzlar, J., Dubrovsky, M., Buchtele, J., Ružička, M. (2003). The apparent and potential effects of climate change on the inferred concentration of dissolved organic matter in a temperate stream (the Mališe River, South Bohemia). Sci. Total Environ. , 310 , 143-152. Hirsh, R.M., Slack, J.R. (1984). A nonparametric trend test for seasonal data with serial dependence. Water Resources Res. , 20 , 727

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Czesława Rosik-Dulewska, Jolanta Robak and Katarzyna Głowala

of Republic of Poland No 134, point 1140, 2002. Journal of Laws of Republic of Poland No 236, point 2369, 2004. PN-75/C - 04646.1 Water and wastewater. Special tests of sludges. Determination of contents of water, dry matter, organic and mineral substances in sludge PN-75/C- 04576.17 Water and wastewater. Examination of nitrogen compounds contents. Determination of total nitrogen by the Kjeldahl's method in sludge PN-75/C-04537 Water and wastewater. Examination

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Taru Sandén, Georg J. Lair, Jeroen P. van Leeuwen, Guðrún Gísladóttir, Jaap Bloem, Kristín Vala Ragnarsdóttir, Markus Steffens and Winfried E.H. Blum

structure with stable aggregates. Free particulate organic matter in soil (fPOM) or occluded POM within the soil aggregates (oPOM) represent plant and animal residues undergoing decomposition and are generally increasing aggregation ( Six et al., 2000 ). POM fractions have been observed to respond more sensitively to soil management changes than to the total soil organic carbon (OC) ( Golchin et al., 1994 ; Chan et al., 2002 ), especially occluded POM that may be lost from soil aggregates due to intense cultivation ( Golchin et al., 1994 ). Cultivation has also been

Open access

Mirosław Kobierski, Krystyna Kondratowicz-Maciejewska and Katarzyna Kociniewska

References Arrouays D., Deslais W., Badeau V., 2001. The carbon content of topsoil and its geographical distribution in France. Soil Use and Management, 17(1): 7-11. Batey T., 2009. Soil compaction and soil management - a review. Soil Use and Management, 25(4): 335-345. Batjes N.H., 2002. Carbon and nitrogen stocks in the soils of central and eastern Europe. Soil Use and Management, 18(4): 324-329. Carter M.R., Angers D.A., Gregorich E.G., Bolinder M.A., 2003. Characterizing organic matter

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Emilia Urbanek, Rainer Horn and Alwin J.M. Smucker

, R., Fischer, W.R., 2008. Physical carbon-sequestration mechanisms under special consideration of soil wettability. Journal of Plant Nutrition and Soil Science, 171, 14-26. Beare, M.H., Cabrera, M.L., Hendrix, F.P., 1994. Aggregateprotected and unprotected organic matter pools in conventional and no-tillage soils. Soil Science Society of America Journal, 58, 787-795. Bronick, C.J., Lal, R., 2005. Soil structure and management: a review. Geoderma, 124, 3-22. Capriel, P., Beck, T., Borchert, H., Härter, P., 1990

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Vladimír Šimanský and Erika Tobiašová

References BIELEK, P. - ŠURINA, B. - ILAVSKÁ, B. - VILČEK, J. 1998. Naše pôdy [Our soils]. Bratislava : VÚPÚ, 1998. 82 p. ISBN 80-85361-42-6 DZIADOWIEC, H. - GONET, S.S. 1999. Przewodnik metodyczny do badań materii organicznej gleb [Methodical guide-book for soil organic matter studies]. Warszawa : Prace Komisji Nauk PTG, no. 120, 1999, pp. 64. Edwards , C.A. - Loft y, J.R. 1982. Nitrogenous fertilizers and earthworms populations in agricultural soils. In Soil Biology and Biochemistry , vol. 14

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Marcin Becher, Krzysztof Pakuła, Joanna Pielech and Ewa Trzcińska

dynamic oxidation and reduction conditions [ Kalembasa, Becher 2010 ]. In the analysed soils, material correlation was also found as regards the content of phosphorus and aluminium. No material dependencies were found as regards the accumulation of the said element on magnesium and calcium. Selected and most characteristic dependencies of the described features were presented in a graphic form ( Figs. 1 – 4 ). Figure 1 Relationship between soil bulk density and total phosphorus content in tested soils. Figure 2 Relationship between soil organic matter