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    Wyświetlanie 1-8 z 8
    Tytuł:
    Dynamics of vegetation at the late pleistocene glacial/interglacial transition (new data from the center of the east European Plain)
    Autorzy:
    Novenko, E. Yu.
    Velicho, A. A.
    Suganova, E. S.
    Junge, F. W,.
    Boettger, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1186118.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    pollen records
    vegetation dynamics
    Eemian
    East European Plain
    Opis:
    The organic sediments at the Cheremoshnik site (the centre of the East European Plain) have been reinvestigated by pollen and macrofossil analysis in order to gather more detailed information on vegetation dynamics during the Late Pleistocene Glacial/Interglacial transition (boundary between OIS 6 and OIS 5e). Two phases of vegetation can be determined: an earlier forest substage ("warm") and a later ("cold") substage, when the forest communities were reduced in their area. There are probably some similar features between the succession of vegetation at the end of Dnieper (Saale) cold epoch and during the Valdai (Weichselian) Late Glacial (Alleröd and Younger Dryas).
    Źródło:
    Polish Geological Institute Special Papers; 2005, 16; 77--82
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przemiany szaty roślinnej śródpolnych oczek wodnych w rejonie Czepina
    Dynamic changes in plant communities in midfield ponds near Czepino
    Autorzy:
    Gamrat, R.
    Burczyk, P.
    Łysko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/338789.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    ekochora
    oczka wodne
    przemiany roślinności
    dynamics of plant communities
    ponds
    vegetation zone
    Opis:
    W pracy przedstawiono wyniki, prowadzonych w latach 1995-2001, badań florystyczno-fitosocjologicznych oczek wodnych. Analizą objęto obszar 1 km², położony w okolicach Czepina w województwie zachodniopomorskim. Oceniono układ szaty roślinnej w sześciu śródpolnych oczkach wodnych. Przedstawiono wyniki badań florystycznych i fitosocjologicznych w kolejnych latach, w czterech ekochorach koncentrycznie ułożonych wokół tafli wodnej.
    Small mid-field water holes in agricultural areas are under a high risk of anthropogenic changes. Six such ponds (situated in 1 km² arable land, near Czepino in zachodniopomorskie province) were studied for seven years since 1995 till 2001. The main aim of the study was to analyse floral and phytosociological differentiation in four zones of ponds: in open water, littoral, scarps and external zone. Sixty five species including one vulnerable to extinction were found in relatively small area of ponds. Existing habitats were classified to four types: rushes, scrub, nitrophilous trodden areas and arable fields. Rush communities Phalaridetum arundinaceae, Typhetum latifoliae and the community with Senecio congestus were dominating. There were also ruderal communities (Urtico-Aegopodietum podagrariae, Calystegio-Epilobietum hirsuti, community with Urtica dioica and Elymus repens), rare scrub communities (Calamagrostis canescens) and nitrophilous community in arable fields (Apera spica-venti). Unfavourable atmospheric conditions, land configuration and anthropogenic conditions caused floral and phytosociological changes. The lack of water resulted in permanent habitat transformation from an open water table to overgrowing ponds. Periodical water deficit caused also physical and floral changes in four plant zones. Some species of swampy (Phragmitetea) and aquatic (Lemnetea, Potametea) habitats retreated to the benefit of meadow (Molinio-Arrhenatheretea) and ruderal (Artemisietea, Stellarietea) plant species. Evaluation of habitat moisture in the littoral zone revealed changes from permanently swamp to swampy. Evaluation of communities showed that outstanding and unique communities transformed into moderately big. So the changes in water conditions caused permanent and irreversible changes in flora leading to the impoverishment of agricultural landscape.
    Źródło:
    Woda-Środowisko-Obszary Wiejskie; 2006, 6, 1; 115-131
    1642-8145
    Pojawia się w:
    Woda-Środowisko-Obszary Wiejskie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changing Land Use in Recent Decades and Its Impact on Plant Cover in Agricultural and Forest Landscapes in Poland
    Autorzy:
    Bomanowska, Anna
    Kiedrzyński, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/764910.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    cultural landscape
    human disturbance
    land use changes
    regeneration
    secondary succession
    vegetation dynamics processes
    Opis:
    The objective of this paper is to present the effects of general changes in land use in recent decades on plant cover structure in Poland. The paper is focused on spontaneous processes that occur in agricultural and forest areas being no longer under human pressure. Studies carried out in different geobotanical regions of Poland demonstrated that the directions and range of dynamic changes in plant cover are similar across the country. The formation of secondary forest phytocenoses, on the lands delivered from human activity is a common ecological process observed today in the agricultural landscape. In the dynamics of forest vegetation the basic process is regeneration after ceased use, and the introduction of legal protection.
    Źródło:
    Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2011, 7; 5-26
    1730-2366
    2083-8484
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Biologica et Oecologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Post-glacial vegetation and environment of the Labanoras Region, East Lithuania: implications for regional history
    Autorzy:
    Gaidamavičius, A.
    Stančikaite, M.
    Kisieliene, D.
    Mažeika, J.
    Gryguc, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059149.pdf
    Data publikacji:
    2011
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    E Lithuania
    post-glacial
    environment
    vegetation dynamics
    plant macrofossil
    pollen
    Opis:
    Multiproxy data (pollen, plant macrofossils, 14C dates and loss-on--ignition measurements) obtained from the Bevardis and Verpstinis lakes in the Labanoras area (East Lithuania) were used to reconstruct a vegetation history and to reveal major environmental features during post-glacial time. Biostratigraphical data indicates ongoing sedimentation in Verpstinis Lake since the final stages of the AllerÝd. The pollen data shows that Pinus-dominated forest flourished during the AllerÝd, while the Younger Dryas was characterized by open shrub/herb/grass vegetation with highly abundant Juniperus. These are evidences of severe climatic conditions in the area. The 14C data suggests that sedimentation started in Bevardis Lake with the onset of the Holocene. Picea immigrated into the Verpstinis Lake surroundings in the Late Glacial, just before 11 500 cal yr BP according to the palynological evidence. The expanding deciduous taxa, e.g., Corylus (ca. 10 200-10 000 cal yr BP), Alnus (8200-8000 cal yr BP), and broad-leaved species with Ulmus (ca. 10 000 cal yr BP), Tilia (7700-7400 cal yr BP) and Quercus (5200 cal yr BP), formed a dense mixed forest where Picea appeared at 7300-6800 cal yr BP. Both diagrams show only negligible human impact. It seems that natural factors were responsible for the formation of vegetation cover and environment in the study area throughout the post-glacial.
    Źródło:
    Geological Quarterly; 2011, 55, 3; 269-284
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vegetation Transformations of Kujawy-Pomerania Region in the Last Twenty Years Period
    Autorzy:
    Załuski, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/765031.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    causes of transformations
    ecological processes
    plant communities
    vegetation dynamics
    Opis:
    This paper contents dynamic tendencies analysis results of Kujawy-Pomerania region (N Poland) for a 20-year time period. Acreage changes as well as structure and species composition transformations of forest and shrub vegetation (associations) and non-forest vegetation (alliances) were evaluated. Main factors influencing on regressive and progressive changes were set out. Analysis was relied on results of geobotanical research and observations of selected objects. Regressive changes were noted for i.a. thermophilous oak forests, dry and fresh coniferous forests, aquatic, halophytic, pasture vegetation, vegetation of Molinion and Cnidion meadows, heaths and xerothermic grasslands. Whereas progressive were observed in case of mixed coniferous forests, mesophytic shrubs, rush and tall herbs vegetation, fresh meadows and some ruderal communities.
    Źródło:
    Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2011, 7; 75-98
    1730-2366
    2083-8484
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Biologica et Oecologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Does vegetation impact on the population dynamics and male function in Anemone sylvestris L. (Ranunculaceae)? A case study in three natural populations of xerothermic grasslands
    Autorzy:
    Denisow, B.
    Wrzesien, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/57860.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    vegetation impact
    population dynamics
    male
    function
    Anemone sylvestris
    Ranunculaceae
    natural population
    xerothermic grassland
    rare species
    shrub
    plant expansion
    pollen mass
    pollen viability
    seed set
    Opis:
    In Poland, like in other parts of Central Europe, dry grasslands significantly contribute to the biodiversity of both fauna and flora. Anthropogenic pressure impair many species of xerothermic habitats, and several populations face an increased risk of extinction. The goal of the study was to define factors that may affect the size of wild populations of Anemone sylvestris L., a protected species in Poland, with both a short- and long-term perspective, and to examine the influence of vegetation changes on the density, the abundance of flowering and male function (pollen production, pollen viability), as well as seed set. In situ observations were performed in 2005-2006 and 2011-2012 in three populations located on the Lublin Upland, SE Poland. The reduction in population density and A. sylvestris blooming was exacerbated by the expansion of the shrubs, but not by Brachypodium pinnatum. Male characteristics of A. sylvestris, i.e. pollen amount per multi-staminate flowers or pollen viability appeared to decrease under pressure of shrub competition. Populations with limitation of male function had impaired degree of seed set. Various consequences for the functioning of populations within a metapopulation system can be expected due to substantial qualitative and quantitative disorders in pollen traits. It is crucial that successful recovery programs for A. sylvestris primary should aim to conserve and manage the habitat.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2015, 84, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany roślinności rezerwatu przyrody Mszar Bogdaniec
    Changes in vegetation of the Mszar Bogdaniec nature reserve
    Autorzy:
    Dyderski, M.K.
    Jagodziński, A.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1294169.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    rezerwaty przyrody
    rezerwat Mszar Bogdaniec
    fitosocjologia
    zbiorowiska roslinne
    zbiorowiska lesne
    zbiorowiska torfowe
    roslinnosc
    zmiany gatunkowe
    transitional bog
    Vaccinio uliginosi-Betuletum pubescentis
    degeneration
    vegetation dynamics
    fluctuation
    Opis:
    Changes of vegetation in forests and wetlands require continuous monitoring and evaluation. Due to the lack of in-depth knowledge, it is still very challenging to predict and record vegetation changes. This study attempts to evaluate changes in forest and transitional bog vegetation over 14 years in the Mszar Bogdaniec nature reserve (West Poland; 21.98 ha). We described the current vegetation using 50 phytosociological relevés conducted in 2012 and 2013. Moreover, we calculated and compared ecological indices describing ecological traits of the vegetation in two different times. We also used Detrended Correspondence Analysis (DCA) to assess changes in floral composition. Most of the studied vegetation traits did not change significantly during the last 14 years. Statistically significant changes occured in the proportion of mosses and cover of the herb layer, both of which increased, as well as species richness in forest plant communities, and the cover of species from Scheuchzerio-Caricetea class in peat bog plant communities, both of which decreased. The current state of the vegetation is a result of former human activity such as drainage and planting monoculture tree stands. The observed changes during the last 14 years were fluctuations rather than direct changes. Encroachment of the woody species into transitional bog is a fluctuation, which may be secondary succession in the long-term.
    Źródło:
    Leśne Prace Badawcze; 2016, 77, 2
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie i dynamika roślinności na terenie Stacji Bazowej Zintegrowanego Monitoringu Środowiska Przyrodniczego w Szymbarku (Beskid Niski)
    Differentiation and dynamics of vegetation in the Base Station of Integrated Monitoring of Natural Environment area in Szymbark (Beskid Niski Mts)
    Autorzy:
    Salachna, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/1574908.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    dynamika roślinności
    Arrenatheretum elatioris
    Tilio cordatae-Carpinetum betuli
    wskaźniki bioróżnorodności
    vegetation dynamics
    biodiversity indicators
    Opis:
    W pracy przedstawiono wyniki badań roślinności, przeprowadzone na terenie Stacji Bazowej Monitoringu Zintegrowanego Środowiska Przyrodniczego w Szymbarku. W celu oceny tendencji dynamicznych wyróżnionych zbiorowisk roślinnych porównano dane fitosocjologiczne z 1995 i 2011 roku. Analiza DCA oraz wielozmienna analiza wariancji PERMANOVA wykazały brak istotnych statystycznie różnic w składzie gatunkowym porównywanych fitocenoz w badanym okresie. Za pomocą testu Wilcoxona dla par wiązanych odnotowano natomiast istotne statystycznie różnice w wartościach średnich bogactwa gatunkowego oraz wskaźnika jednorodności gatunkowej Pielou. Największe przeobrażenia struktury stwierdzono w zespole rajgrasu wyniosłego Arrenatheretum elatioris Br.-Bl. ex Scherr. 1925, co wynika z dużej wrażliwości tej fitocenozy na zmiany parametrów środowiskowych oraz sposobu użytkowania.
    The paper presents the results of vegetation research carried out in the Base Station of Integrated Monitoring of Natural Environment area in Szymbark. In order to assess the dynamic trends of the distinguished plant communities phytosociological data from 1995 and 2011 were compared. The DCA analysis and the multivariate PERMANOVA analysis of variance showed no statistically significant differences in the species composition of the compared phytocoenoses in the period 1995–2011. Using the Wilcoxon signed-rank test, statistically significant differences were noted in the mean values of species richness and the Pielou species homogeneity index. The greatest transformations in the structure were found in the Arrenatheretum elatioris association, which results from the high sensitivity of this phytocoenosis to changes in environmental parameters and the way of use.
    Źródło:
    Inżynieria Ekologiczna; 2020, 21, 4; 10-19
    2081-139X
    2392-0629
    Pojawia się w:
    Inżynieria Ekologiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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