Wyniki wyszukiwania - Biblioteka Nauki

1

Solidagini virgaureae-Juniperetum communis - an overlooked association of oligotrophic subcontinental juniper scrub

100%

Zaniewski P. T. , Zaniewska E.

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nr 10

2

Ecological succession of bryophytes and lichens on mineral-soil habitats originated within windthrows (Kampinos National Park, central Poland)

100%

Fojcik B. , Zaniewski P. T.

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nr 05

3

Zmiany leśnych zbiorowisk roślinnych w latach 1959-2016 na stałej powierzchni badawczej w oddziale 319 Białowieskiego Parku Narodowego

80%

Ciurzycki W. , Brzeziecki B. , Zaniewski P. T. , Keczynski A.

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nr 11

EN

The long−term changes of vegetation cover at the level of woodland community taking place between 1959 and 2016 on the permanent study plot located in the compartment 319 of Białowieża National Park are discussed. In 1959 two distinctive woodland community types occurring on sample plot were distinguished: subboreal mixed pine−oak forest (Serratulo−Pinetum) and hornbeam−lime forest (Tilio−Carpinetum). The phytosociological investigations, carried out almost 60 years later, revealed that in case of both communities, significant, directional changes of their floristic composition took place. Particularly high rate of change occurred in case of the phytocoenosis representing the Serratulo−Pinetum community. In 1959 it contained a full set of characteristic plant species. During the study period, this community type representing the Vaccinio−Piceetea class, was replaced by the initial form of lime−hornbeam forest belonging to the Querco−Fagetea class. Also, in case of the previous Tilio−Carpinetum association, the significant changes in the floristic composition occurred, although not as large as in case of Serratulo−Pinetum community. 60 years ago this community type contained several plant species typical for thermophilous oak forests. Nowadays, it represents a typical form of lime−hornbeam association. The changes in both community types were mainly related to the strong expansion of lime and hornbeam, which took place during the study period and involved the whole study plot. As a result, the vegetation occurring on the study plot is much more homogenous now than it was ca. 60 years ago. The maintenance of Serratulo−Pinetum phytocoenoses distinguished by a high floristic diversity calls for active protective measures in all cases where such measures are allowed and where this community type can potentially develop.

4

Modelowanie trwałości boru chrobotkowego Cladonio-Pinetum Juraszek 1927 na terenie Parku Narodowego "Bory Tucholskie" z wykorzystaniem metody powtórzonej chronosekwencji

80%

Zaniewski P. T. , Potoczny B. , Matuszkiewicz J. M.

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tom 160

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nr 05

EN

Cladonio−Pinetum Juraszek 1927 forest is protected in Europe as the Natura 2000 habitat. Nowadays its naturalness is often considered to be doubtful. In spite of the many research, the knowledge about ecology and dynamics of this community is still insufficient. The aim of the research is to define the stability of the community within ‘Bory Tucholskie' National Park. The site is located in the area of the best developed patches of the habitat, in north−western Poland. Two datasets of relevés were used. The first comes from published data and includes 123 relevés made in year 2000. The other comes from own fieldworks performed in 2014. Due to the high homogeneity of geology and soils of the study site, repeated chronosequence method could be used to compare both datasets. The information about herb and moss layers of all relevés was compared using DCA method. The change in community was measured as a shift in the position within the main gradient of DCA over 14−year period. It was calculated for 122 pairs of relevés. Than the model of the speed of community change was computed for the main gradient. We used two methods of calculation of duration of the lichen−rich pine forests. The first was based on the calculated ranges of distinguished associations and the other used the model of cover of species connected to Cladonio−Pinetum forest. As the speed of community change in the gradient and the distance between distinguished communities were known, the time of community duration could be computed. According to obtained results, Cladonia−Scots pine forest (Cladonio−Pinetum) and lichen rich fresh pine forest (Leucobryo−Pinetum with Cladonia) of ‘Bory Tucholskie' National Park will last for 64−109 years. This result shows, that the considered Natura 2000 habitat is unstable. It is the possible development stage within managed forest stands and active conservation is necessary where its preservation is needed.

5

A century-long change in vegetation in Zdrojowa Góra interdunal depression, Niepust range, Kampinos National Park (central Poland)

80%

Zaniewski P. T. , Zaniewska E. , Keblowska A. , Kwasny L.

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tom 166

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nr 07

6

Bogactwo gatunkowe porostów w fitocenozach regenerujących na pożarzyskach obszarów wydmowych Basenu Dolnego doliny Biebrzy

71%

Zaniewski P. T. , Potoczny B. , Siedlecki L. , Krasinska R. , Bernatowicz A.