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The environmental and landscape values of the small lowland river valley and their threats on the example of the Kraska river (Masovian Voivodeship)

Celejewska-Mrozek Katarzyna, Oglęcki Paweł

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2019

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Vol. 28, No. 1

72--81

EN

The environmental and landscape values of the Kraska River Valley as the typical example of small lowland water flow path were analysed. The WULS-SGGW method, allowing to the estimation of whole valley reach as well as its peculiar eco-morphological zones, was used. The unregulated, regulated in the years 1990–2012 and continuously maintained from the year 2015 reaches are present in the valley. It was stated that the unregulated reaches characterise themselves by higher environmental values and biological diversity, especially in the case of invertebrate fauna. The invertebrates, as the key element of the river community, quickly rebuild their structure after the termination of maintenance works. The vertebrate fauna, even unconnected strictly with the riverbed, shows higher values on the unmaintained valley reaches.

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Feeding strategy of wintering rooks Corvus frugilegus L. in urban habitats

Jadczyk P., Drzeniecka-Osiadacz A.

Polish Journal of Ecology

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2013

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Vol. 61, nr 3

587--596

EN

Rooks show a growing tendency to winter in cities. The aim of this study was to determine the influence of meteorological factors on the selection of feeding habitats and to discuss the diversity of feeding strategies in urban environments of different sizes and housing densities. The study was carried out in two cities in south-western Poland, Wrocław and Brzeg (populations of 636,000 and 39,000, respectively), in the years 2004–2008. Nineteen research areas differing in housing density were controlled once a week. In multiple regression, the number of rooks feeding in urban environments showed a correlation with air temperature and the thickness of snow cover. The densities of feeding rooks were higher in urban environments than in agrocenoses. They were also higher in Wrocław than in Brzeg, and in built-up areas than in undeveloped ones. Feeding groups were smaller in Brzeg than in Wrocław. They were also smaller in built-up areas in Brzeg than in undeveloped ones. More rooks fed individually in Brzeg than in Wrocław. The diversity in the frequency of individually feeding rooks in built-up and undeveloped environments was specific to each city. Rooks feeding in Brzeg were more active in searching for food than those in Wrocław, and birds feeding on optimum, undeveloped feeding grounds were more active than those in built-up areas . In both cities, rooks were fed by humans, mainly in built-up areas.

3

Zmiany klimatu : apokalipsa vs zdrowy rozsądek

Kolenda Z.

Chemik

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2008

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Vol. 61, nr 11

607-614

PL

W artykule przedstawiono stan badań dotyczących obserwowanych zmian klimatu. Przedstawiono różnice poglądów na temat przyszłych zmian klimatycznych oraz wpływ rozwoju cywilizacyjnego na ich wielkość.

EN

Paper presents actual state in the discussion on climate changes. Impacts assiociated with global temperature variations are presented together with the antropogenic components.