Jan Trojanowski

The influence of anthropogenic factors on organic matter content changes in chosen beach ecosystems

AbstractSandy sediments coming from two beaches being under the various anthropopressure were analyzed. The first beach was situated in Ustka, while the other one on the terrain of The Slowinski National Park. The general content of organic matter (OM), proteins, lipids, carbohydrates, chlorophyll a, and organic carbon were determined. The content of a biopolymeric organic carbon, values of a food index, and a coefficient of aging of the OM were estimated. Research was conducted with intervals for three months. It was established that human activity impacts on the concentration of analytes in the ecosystem of a seaside beaches. Their higher concentration was observed on the beach under more intensive anthropopressure. The results of the analysis of variance proved that the content of chemical parameters depends on the economic and tourist activity, the season of the year, and the impact of sea water. The stations situated at the central part of the beach are characterized by larger concentration of protei...

Prognosis Content of Heavy Metals in Soil and Herbaceous Plants in Selected Pine Forests in the Słowiński National Park

Abstract This paper presents the results of study on heavy metals in soil and in herbaceous plants in selected pine forests in Słowiński National Park. The heavy metals, such as Zn, Cu, Mn and Fe were studied. Concentrations of zinc in tested soil are strongly and very strongly related to manganese and copper content (r = 0.57 do r = 0.98, p < 0.05). Moreover, the soil moistening has vital impact on copper content in the plants of the ground cover. It was also found that moss in comparison to other forest plants captures higher volume of zinc and copper. The content of the above mentioned metals in the plants of dry coniferous forests (Bs), fresh coniferous forests (Bśw) and humid coniferous forests (Bw) of the ground cover constitute the following decreasing series: Mn(438.1) > Fe(98.6) > Zn(35.2) > Cu(3.5).

The structure and dynamics of litterfall in forest stands in the Słowiński National Park in 2003-2005

Struktura i dynamika opadu organicznego w wybranych drzewostanach Słowińskiego Parku Narodowego w latach 2003-2005 The structure and dynamics of litterfall in forest stands in the Słowiński National Park in 2003-2005 The study of litterfall was carried out in two different forest ecosystems: Vaccinio uliginosi-Betuletum pubescentis and Empetro nigri-Pinetum in the period between 2003-2005. The plant fall in the form of needles, leaves, shoots, sheeds, cones and barks provides to forest soils a lot of biogenic compounds. Much bigger annual mass of litterfall was found in Vaccinio uliginosi-Betuletum pubescentis and it was average 4,050 t/ha·year during research period. In the young wood Empetro nigri-Pinetum the litterafall was about 29% smaller (2,883 t/ha·year). The maximum intensity of litterfall occurred in autumn months and constituted about 60% of annual amount.