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    Wyświetlanie 1-6 z 6
    Tytuł:
    Roslinnosc Jeziora Zbaszynskiego [Pojezierze Lubuskie] na tle stanu jego trofii
    Autorzy:
    Pelechaty, M
    Kaluska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/878147.pdf
    Data publikacji:
    2003
    Wydawca:
    Uniwersytet Przyrodniczy w Poznaniu
    Tematy:
    roslinnosc wodna
    roslinnosc
    trofia
    eutrofizacja
    roslinnosc szuwarowa
    makrofity
    Jezioro Zbaszynskie
    Pojezierze Lubuskie
    Opis:
    The macrovegetation of a large shallow lake (Lake Zbąszyńskie, Lubuskie Lakeland) was characterized against the background of its physico-chemical properties. The question of interest was whether the phytocoenotic composition and structure of macrophyte vegetation reflect abiotic and trophic conditions of the studied lake. The results are discussed in the context of the theory of alternative stable states in shallow lakes.
    Źródło:
    Roczniki Akademii Rolniczej w Poznaniu. Botanika; 2003, 06; 147-155
    1508-9193
    Pojawia się w:
    Roczniki Akademii Rolniczej w Poznaniu. Botanika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inter- and intra-specific variability in δ13C and δ18O values of freshwater gastropod shells from Lake Lednica, western Poland
    Autorzy:
    Apolinarska, K.
    Pełechaty, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/139408.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    C stable isotopes
    O stable isotopes
    recent gastropod shells
    freshwater
    inter-specific differences
    intraspecific variability
    lake Lednica
    izotopy stabilne
    izotopy węgla
    izotopy tlenu
    muszle ślimaków
    słodkowodne
    różnice międzygatunkowe
    zmienność wewnątrzgatunkowa
    jezioro Lednickie
    Opis:
    This study focuses on the inter- and intra-specific variability in δ13C and δ18O values of shells and opercula of gastropods sampled live from the littoral zone of Lake Lednica, western Poland. The δ13C and δ18O values were measured in individual opercula of Bithynia tentaculata and in shells of Bithynia tentaculata, Gyraulus albus, Gyraulus crista, Lymnaea sp., Physa fontinalis, Radix auricularia, Theodoxus fluviatilis and Valvata cristata. The gastropods selected for the study are among the species most commonly found in European Quaternary lacustrine sediments. The carbon isotope composition of the gastropod shells was species-specific and the same order of species from the most to the least 13C-depleted was observed at all sites sampled. Differences in shell δ13C values between species were similar at all sampling sites, thus the factors influencing shell isotopic composition were interpreted as species-specific. The δ18O values of shells were similar in all the species investigated. Significant intra-specific variability in shell δ13C and δ18O values was observed not only within the populations of Lake Lednica, which can be explained by heterogeneity of δ13C DIC, δ18O water and water temperature between the sites where macrophytes with snails attached were sampled, but also between individuals sampled from restricted areas of the lake’s bottom. The latter points to the importance of factors related to the ontogeny of individual gastropods.
    Źródło:
    Acta Geologica Polonica; 2017, 67, 3; 441-458
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nitella opaca [Bruzelius] Agardh [Characeae] w Wielkopolsce
    Autorzy:
    Gabka, M
    Pelechaty, M.
    Pukacz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/878202.pdf
    Data publikacji:
    2003
    Wydawca:
    Uniwersytet Przyrodniczy w Poznaniu
    Tematy:
    Wielkopolska
    ramienice
    wystepowanie
    gatunki zagrozone
    glony
    Characeae
    Nitella opaca
    nowe stanowiska
    Opis:
    This paper presents historical and new localities of Nitella opaca, a rare charophyte species whose distribution in the light of published data and herbarium material was restricted to a few localities in the Wielkopolska region. The basic information on the species ecology and detailed characteristics of phytocoenotic interrelation are provided. So far, the occurrence of Nitelletum opacae in the Wielkopolska region has not been reported.
    Źródło:
    Roczniki Akademii Rolniczej w Poznaniu. Botanika; 2003, 06; 33-38
    1508-9193
    Pojawia się w:
    Roczniki Akademii Rolniczej w Poznaniu. Botanika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transformation and simplification of aquatic vegetation structure and reoligotrophication of a lake during the last 40 years
    Autorzy:
    Brzozowski, M.
    Pelechata, A.
    Kaczmarek, L.
    Pelechaty, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2130559.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    aquatic vegetation
    vascular plants
    charophytes
    Chara-lake
    water fertility
    Lychnothamnus barbatus
    Nitellopsis obtusa
    Opis:
    The recovery or reconstruction of aquatic vegetation has recently been reported as a result of water quality improvement aer anthropogenic eutrophication. The objectives of this study were: to investigate long-term trends in aquatic vegetation abundance in relation to decreasing water fertility and to present new directions in changes of the submerged aquatic vegetation structure, species richness, and biodiversity in Lake Kuźnickie (western Poland) with the perspective of the last 40 years (1978–2018). Lake Kuźnickie is an example of water quality improvement taking place without any additional reclamation measures, except a reduction in nutrient discharge into the lake from its direct catchment. Currently, the study lake represents a mesotrophic status. The Trophy State Index evidenced a decrease in the lake’s fertility compared to previous decades. The water quality improvement manifests in a significant reduction in the total phosphorus concentration. An analysis of the spatial changes in the phytolittoral evidenced a decrease in rush vegetation between 1978 and 2018 by over 2 ha. In the period 1978–2018, the aquatic vegetation structure in Lake Kuźnickie underwent significant reconstruction. Currently, charophytes play a much greater role in the lake compared to the last 40 years, contributing to the maintenance of the lake’s high water quality. Moreover, the endangered charophyte Lychnothamnus barbatus has recovered. Concurrently, however, the biodiversity and species richness of the submerged vegetation has decreased. At present, only four species dominate in the lake, including two charophytes L. barbatus, Nitellopsis obtusa, and two vascular plants Ceratophyllum demersum and Myriophyllum spicatum. Over 40 years, Lake Kuźnickie has changed from a eutrophic lake dominated by vascular plants to a mesotrophic lake with a codominant contribution by charophytes. The lake is characterized by good water quality, optimal for the development of aquatic vegetation, especially charophytes.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2021, 90
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New records of Chara connivens P. Salzmann ex A. Braun 1835 - an extremely rare and protected species in Polish brackish waters
    Autorzy:
    Brzeska, P.
    Wozniczka, A.
    Pelechaty, M.
    Blindow, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/56909.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    new record
    Chara connivens
    extremely rare species
    rare species
    protected species
    Polska
    brackish water
    Vistula Lagoon
    Szczecin Lagoon
    baltic Sea
    Opis:
    The stonewort Chara connivens was rediscovered in the Vistula Lagoon in 2011, almost 35 years after its last record. In 2012, the species was recorded for the first time in the Szczecin Lagoon. Chara connivens occurred at shallow (0.5–1.2 m) sandy-muddy and muddy bottoms of small embayments. In the Vistula Lagoon, the stonewort was represented by single small specimens, while in the Szczecin Lagoon, it formed dense and extensive patches.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2015, 84, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative study of the oospore morphology of two populations of a rare species Chara baueri A. Braun in Cedynia (Poland) and Batzlow (Germany)
    Autorzy:
    Pukacz, A.
    Boszke, P.
    Pelechaty, M.J.
    Raabe, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/58067.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    oospore
    charophyte
    Characeae
    morphology
    population
    rare species
    Chara baueri
    Cedynia
    Polska
    Batzlow
    Germany
    Opis:
    Morphological features of oospores of Chara baueri A. Braun, one of the rarest charophyte species worldwide, were studied based on 100 oospores collected from a small and temporarily dried mid-field pond near Cedynia, Western Poland. This is the first Polish and fifth presently known locality of this species. For comparison 67 oospores from a German population (similar pond localized near Batzlow, Germany) were also measured. So far, data on morphology of C. baueri oospores as well as the species ecology are limited. The only more detailed study of oospores for this species was earlier performed on 15 oospores from Kazakhstan. Largest polar axis (LPA, length), largest equatorial diameter (LED, width), isopolarity index (ISI = LPA/LED × 100), number of ridges, width of fossa, distance from apical pole to LED (AND) and anisipolarity index (ANI = AND/LPA × 100) were measured. The comparative analysis revealed that the oospores from Poland are generally bigger and more prolate than the German ones. The differences for most of studied parameters were statistically significant. The finding is discussed in the context of habitat differentiation of both studied sites. Moreover, the results obtained of oospore measurements for both populations differs from most of the data known so far from the literature.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2012, 81, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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