Wyniki wyszukiwania - Biblioteka Nauki

1

Macrofungi in human habitats

100%

Pal-Fam F.

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2001

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tom 47

2

Ground water fed system restoration on the area of Przemkowsko-Przeclawskie Wetlands

84%

Brandyk A.

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2011

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tom 43

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nr 1

EN

The aim of the paper is the estimation of hydrological conditions occurring on the area of Przemkowsko- Przecławskie Wetlands in the proposed water management scenarios, which are implemented to restore natural values of the wetland environment .In each of the scenarios, the operation parameters of hydraulic structures were changed, causing the potential increase of ground water alimentation to the wetland area. Common and recognized ground water flow model MODFLOW was used to calculate ground water levels for each scenario and to study the long –term effect of restoration measures on Przemkowsko – Przecławskie Wetlands. Following hydrological characteristics were analysed: mean of the mean ground water levels, inundation frequency, mean ground water amplitude and mean low ground water levels. These characteristics were modeled for the long-term period 1964-1985 for unsteady flow conditions and were compared with the values adopted from intact, reference wetlands. It was proved, that slowing down the outflow of ground water (scenario 1) didn’t provide hydrological conditions desired for the maintenance of swampy habitats. The combination of outflow slow down and restriction of ground water abstraction by existing pumping stations (scenario 2) didn’t guarantee the maintenance of desired values of hydrological characteristics for a swampy habitat as well. The realization of the proposed scenarios enables to keep proper conditions for wet and moist habitats. The management policy for Przemkowsko - Przeclawskie Wetlands should then be directed at the development of those habitats, providing broad realization of environmental protection goals.

PL

W pracy wykorzystano modelowanie przepływu wód podziemnych do obliczenia charakterystyk hydrologicznych wód podziemnych na renaturyzowanym obszarze Bagien Przemkowsko Przecławskich dla różnych wariantów gospodarowania wodą. Analizowane charakterystyki hydrologiczne obejmowały: średnie stany wody, średnie amplitudy zwierciadła wody, częstotliwości zalewu oraz średnie stany niskie. Ich wartości uzyskano dla wieloletniego okresu 1964- 1985 droga modelowania nieustalonego przepływu wód podziemnych, a następnie porównano je z wartościami charakterystyk dla mokradeł referencyjnych Na podstawie tego porównania stwierdzono, że w granicach obiektu badań odtwarzane siedliska odznaczały się warunkami wodnymi korzystnymi dla podmokłych łąk z dominacją ziołorośli i zbiorowisk kaczeńcowych. Warunki takie uzyskano w wariantach gospodarowania wodą zakładających kombinacje spowolnienia odpływu przez urządzenia piętrzące z ograniczeniem ujmowania wód istniejącymi przepompowniami. W wyniku kombinacji takich działań zasilanie podziemne obiektu zwiększa się, stwarzając warunki wodne korzystne dla siedlisk podmokłych i wilgotnych, nie gwarantuje natomiast odtworzenia procesów bagiennych na obszarach chronionych.

3

Species richness of breeding birds at a landscape scale: which habitat type is the most important?

84%

Skorka P. , Martyka R. , Wojcik J. D.

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2006

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tom 41

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nr 1

4

Characteristics of closed breeding stations of bison [Bison bonasus L.] in Poland in the years 1997-2000

84%

Zalewski D. , Szczepanski W. A. , Wolkowycka M.

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nr 1

5

Liverworts of the nature reserves in Wielkopolska. 3. 'Dabrowa kolo Biadek Krotoszynskich'

84%

Gorski P.

Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana

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2006

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tom 10

6

Seasonal and annual variation in the diet of the raccoon dog Nyctereutes procyonoides in northern Belarus: the role of habitat type and family group

67%

Sidorovich V. E. , Solovej I. A. , Sidorovich A. A. , Dyman A. A.

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nr 1

EN

To study variation in the diet of the raccoon dogNyctereutes procyonoides Gray, 1834 in northern Belarus, 3299 scats were sampled from 18 localities differing in habitat quality. In one of the 18 localities, the dietary study was conducted for nine years. The data obtained was analysed according to seasonality, between-year difference, family specificity and habitat influence. In northern Belarus, the raccoon dog was found to be a generalist predator with omnivorous and opportunistic feeding habits. Their diet was highly variable, but a common trait was specialization on carrion in winter and on berries in late summer. Beside carrion and berries, the other seasonally important food items were frogs, insects, plant matter, mammals, and birds. The diet varied between seasons and habitats. In the warm season, habitat factors, such as type of soil (clay or sand), proportion of lakes and open grassy marshes, seemingly determine the food supply for raccoon dogs, and thereby influence the diet of individuals. The obtained results on dietary variation of raccoon dogs can be used in detailed analysis of the impact of this introduced species on native fauna and its role in functioning of vertebrate communities.

7

Free-ranging bison [Bison bonasus L.] management in Poland in the years 1997-2000

67%

Zalewski D. , Szczepanski W. A. , Wolkowycka M.

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nr 1

8

Tentative list of endemic vascular plants of the Zeravshan Mts in Tajikistan: distribution, habitat preferences and conservation status of species

51%

Nowak A. , Nobis M.

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tom 19