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    Wyświetlanie 1-10 z 10
    Tytuł:
    Lathyrus aphaca L.: the distribution, habitats and remarks on the status of the species in Poland
    Autorzy:
    Nobis, A.
    Nobis, M.
    Urbisz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/56975.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Lathyrus aphaca
    distribution
    habitat
    species status
    Polska
    weed
    Caucalidion alliance
    epoecophyte
    ephemerophyte
    Opis:
    Lathyrus aphaca, which is in Poland considered to be an ephemerophyte recorded mainly in the north-west and the south-west, has lately been observed in arable fields in the south of the country. Recent and historical data on the distribution of the taxon in Poland are presented. Original relevés conducted in arable fields in Poland are analysed and compared to those from the Czech Republic, Germany and Slovenia. The current status of L. aphaca in the Polish flora is discussed.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2011, 80, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Jodła sycylijska na skraju wyginięcia – czy istnieje szansa dla tego krytycznie zagrożonego gatunku?
    Sicilian fir near to extinction – Is there any chance for this critically endangered species?
    Autorzy:
    Sękiewicz, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/1186043.pdf
    Data publikacji:
    2020-02-19
    Wydawca:
    Polskie Towarzystwo Dendrologiczne
    Tematy:
    biodiversity hotspot
    conservation status
    endemic
    Mediterranean region
    Sicilian fir
    threatened species
    Opis:
    In the mountains of the north-central Sicily (Italy), a small and isolated population of Sicilian fir (Abies nebrodensis) has survived to the present day. It is the most unique species of the Sicilian flora, not only because of its taxonomic position, but mostly because of its endemic and relict status and the serious risk of extinction. The single natural population of this extremely rare species is currently represented by only 30 mature individuals scattered over a small area in the Madonie Mountains. This species has experienced intensive population decline since the end of the 17th century, and its situation became extremely critical in the first decades of the 19th century due to deforestation and overgrazing. Consequently, Sicilian fir was considered to be extinct about three decades before being rediscovered on the Madonie Mts. in 1937. Sicilian fir is recognized as one of the most endangered coniferous species in the world. It is classified as critically endangered by IUCN, and also included in the list of 50 most endangered plant species in the Mediterranean region. Currently, the limited population size, a small proportion of reproductive individuals, habitat loss, ongoing and projected climate change, and hybridization with other species pose serious threats to survival of this species. Therefore, it is extremely important to maintain actions focusing on in situ and ex situ conservation in order to preserve and protect the existing resources of Sicilian fir, which represents the natural heritage unique to the Mediterranean.
    Źródło:
    Rocznik Polskiego Towarzystwa Dendrologicznego; 2019, 67; 39-48
    2080-4164
    2300-8326
    Pojawia się w:
    Rocznik Polskiego Towarzystwa Dendrologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carex disperma Dewey versus Carex loliacea L. (Cyperaceae): distribution dynamics and conservation status in Poland
    Autorzy:
    Pawlikowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/57627.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Carex disperma
    Carex loliacea
    Cyperaceae
    distribution dynamics
    conservation status
    Polska
    threatened species
    range limit
    Opis:
    Carex disperma Dewey reaches its south-eastern range limit in north-eastern Poland. It has often been confused with Carex loliacea L. In this paper the diagnostic features of both species are presented. A total of about 47 reliable localities of C. disperma were recorded within the present borders of Poland. Less than one-third of them have only been confirmed recently. They are aggregated in large forest complexes in north-eastern Poland (Romincka, Białowieża, Borki, Augustów and Knyszyn Forests). A list of localities of C. disperma based on herbarium records, credible literature data and the author's own data is provided, as well as maps of distribution of both C. disperma and C. loliacea in Poland. The existence of C. disperma × C. loliacea hybrid was not confirmed. Considering the number of localities, dynamics and population sizes of both species it is clear that C. disperma is a species with higher conservation value than C. loliacea. Unlike C. disperma, the latter species is not threatened with extinction in Poland. The resources of C. disperma are very limited and the species needs conservation measures such as creating sufficiently large nature reserves where appropriate hydrological conditions can be maintained.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2010, 79, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Arbuscular mycorrhiza of endemic and endangered plants from the Tatra Mts
    Autorzy:
    Zubek, S
    Turnau, K.
    Blaszkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/57673.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    conservation
    endemic plant
    Tatras Mountains
    mycorrhizal status
    endangered plant
    botany
    arbuscular mycorrhiza
    plant species
    Opis:
    The mycorrhizal status of 24 plant species considered as endemic, endangered in Poland and included in the IUCN Red List of Threatened Plants is reported. Selected plants and rhizosphere soil samples were collected in the Tatra Mts (Western Carpathians). Individuals of seriously threatened taxa were obtained from seeds and inoculated with available AM fungal strains under laboratory conditions. AM colonisation was found in 16 plants; 9 species were of the Arum-type, 4 - Paris and 3 taxa revealed intermediate morphology. The mycelium of the fine endophyte (Glomus tenue) and dark septate fungi (DSE) were observed in the material collected in the field. 20 AMF species (Glomeromycota) found in the rhizosphere of the investigated plants were reported for the first time from the Tatra Mts. The results provide information that might be useful for conservation and restoration programmes of these species. Application of AMF in active plant protection projects is discussed.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2008, 77, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution, ecology and conservation status of Dionysia involucrata Zaprjag., an endangered endemic of Hissar Mts (Tajikistan, Middle Asia)
    Autorzy:
    Nowak, A.S.
    Nobis, M.
    Nowak, S.
    Nobis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/57230.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    plant distribution
    plant ecology
    conservation status
    Dionysia involucrata
    endangered species
    endemic species
    vegetation
    chasmophyte
    petrophyte
    phytosociology
    syntaxonomy
    Hissar Mountains
    Tajikistan
    Asia
    Opis:
    Dionysia involucrata Zaprjag. (Primulaceae) is known as critically endangered endemic species of Hissar Mountains in Tajikistan. It is reported from few localities mainly in Varzob River valley and its tributaries. The species inhabits steep or overhanging faces of granite rocks in narrow river gorges. During the research all known populations of D. involucrata were examined in respect of the habitat conditions and species composition of vegetation plots. We analyzed the population extent of the species in its range in Tajikistan and the main threats in order to assess its conservation status. The detrended correspondence analysis was performed on a matrix of 65 relevés and 49 species (vascular plants and mosses), to classify the phytocoenosis with domination of D. involucrata according to their floristic composition in relation to other petrophytic vegetation units. Using our field data regarding present extent of occurrence and area of occupancy we conclude that the threat category of D. involucrata should be reassessed from critically endangered to endangered. The species shows decline tendency in extent of occurrence, area of occupancy as well as in number of locations. The vegetation plots with domination of D. involucrata have relatively high level of separateness due to different species composition. We define the new association – Dionysietum involucratae – representing chasmophytic vegetation of submontane and montane zone in Middle Asia (ca. 1000–1600 m a.s.l.). The plots of Dionysietum involucratae were found mainly on granite rocks, on very steep or overhanging faces, on southwestern or southern exposition. The association is rather poor in species with inconsiderable contribution of mosses. Despite the diagnostic species, Campanula incanescens, Carex koshewnikowii and Scutellaria hissarica were the most abundant and frequent taxa within the researched patches of vegetation.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phytoplankton size structure and species composition as an indicator of trophic status in transitional ecosystems: the case study of a Mediterranean fjord-like karstic bay
    Autorzy:
    Bosak, S.
    Silovic, T.
    Ljubesic, Z.
    Kuspilic, G.
    Pestoric, B.
    Krivokapic, S.
    Vilicic, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/48711.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton community
    size structure
    species composition
    trophic status
    ecosystem
    aquatic ecosystem
    picophytoplankton
    Adriatic Sea
    Boka Kotorska Bay
    karstic bay
    Opis:
    The species composition and size-structure of the phytoplankton community in the Boka Kotorska Bay (SE Adriatic Sea) were analysed with respect to abundance and carbon biomass, together with the physico-chemical parameters, with the aim of evaluating the predefined oligo-mesotrophic status of this transitional water ecosystem. Three stations located in the inner part of the Bay were sampled with seasonal frequency in 2008/2009. Picophytoplankton cells were counted using flow cytometry; nanophytoplankton and microphytoplankton were identified and counted by light microscopy. The relative importance of the picoplankton in the Bay, in terms of both abundance and biomass, during all the investigated seasons emphasized their significance in the phytoplankton community. Picocyanobacteria (Synechococcus) constituted a significant part of the summer assemblages with regard to both abundance (up to 3.38 × 108 cells L−1) and carbon biomass (up to 73% of total phytoplankton carbon). The contribution of the nanophytoplankton was found to be generally low (<20% of the total phytoplankton carbon) in all seasons, and was dominated by autotrophic/mixotrophic flagellates. Species with a preference towards nutrient-enriched conditions, like the diatom Skeletonema marinoi, dominated the microphytoplankton fraction. S. marinoi was the most abundant in spring/winter (up to 2.86×106 cells L−1) above the halocline (making a 96% contribution to the microphytoplankton). The potentially toxin-producing diatom Pseudo-nitzschia pseudodelicatissima was recorded at abundances greater than 105 cells L−1, together with Thalassionema frauenfeldii, as well as the dinoflagellates Prorocentrum micans and the potentially harmful P. minimum. The higher values of phytoplankton biomass and the dominance of phytoplankton species or groups with preferences for nutrient-enriched conditions appear to be consistent with the oligo-mesotrophic status of this specific ecosystem.
    Źródło:
    Oceanologia; 2012, 54, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rotifer trophic state indices as ecosystem indicators in brackish coastal waters
    Autorzy:
    Gutkowska, A.
    Paturej, E.
    Kowalska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/49197.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    rotifer
    trophic status
    chemical parameter
    physical parameter
    salinity
    brackish water
    coastal water
    indicator species
    zooplankton
    Vistula Lagoon
    environment condition
    biological monitoring
    Źródło:
    Oceanologia; 2013, 55, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of freezing desiccation on cold hardiness, ROS, membrane lipid levels and antioxidant status in spruce seedlings
    Autorzy:
    Kaminska-Rozek, E
    Pukacki, P.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/58255.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    desiccation stress
    antioxidant status
    freezing desiccation
    spruce
    desiccation
    phospholipid
    lipid level
    lipid
    membrane
    cold hardiness
    reactive oxygen species
    seedling
    Picea
    winter desiccation
    Opis:
    The symptoms of oxidative stress and antioxidative response were investigated on Norway spruce seedlings subjected to freezing desiccation conditions. Three-year-old seedlings were exposed to freezing desiccation at -3oC and -10oC for 45 days in two acclimation stages: autumn (October) and winter (January). The stress enhanced the production of reactive oxygen species (ROS): superoxide radical anion (O2.-), and hydrogen peroxide (H2O2). Concentrations of low molecular antioxidants: glutathione (GSH), ascorbic acid (AsA) and a-tocopherol declined at both low temperatures and acclimation stages. The activity of superoxide dismutase (SOD) increased with ROS production, while guaiacol peroxidase (POX) activity decreased. The freeze-induced desiccation of needles was significantly correlated with the cold hardiness (LT50), the level of low-molecular antioxidants, and POX activity, but not with SOD activity. Under extreme freezing desiccation conditions, these reactions continued, leading to the degradation of membrane phospholipids and a strong decrease in cold hardiness. The results show that membranes are the primary site of injury induced by ROS, produced under the influence of low temperature combined with dehydration. The acclimation response of Norway spruce needles to the oxidative stress generated by long-term cold and/or freezing desiccation is discussed.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2005, 74, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Arbuscular mycorrhiza of plants spontaneously colonizing the soda heap in Jaworzno [Southern Poland]
    Autorzy:
    Gucwa-Przepiora, E
    Blaszkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/58548.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    mycorrhizal status
    Polska
    spore population
    Glomus
    soda heap
    fungi
    Jaworzno
    plant systematics
    host
    Upper Silesian region
    Trifolium montanum
    plant species
    Glomeromycota
    industrial waste
    Centaurea stoebe
    Opis:
    The results of studies of the mycorrhizal status of plant species spontaneously established on the soda heap located in Jaworzno (Upper Silesia, Poland) are presented. Additionally, the species of arbuscular fungi of the phylum Glomeromycota extracted from field-collected rhizosphere substrate samples of the heap are showed. Arbuscular mycorrhizae were described in 17 plant species. Five Glomus spp. were recognized in the spore populations of arbuscular fungi isolated. The investigation presented in this paper for the first time revealed Centaurea stoebe and Trifolium montanum to be hosts of arbuscular fungi.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Superoxide dismutase and glutathione peroxidase activity in porcine follicular fluid i relation to follicle size, birth status of gilts, ovarian location and year season
    Aktywnosc dyzmutazy ponadtlenkowej i peroksydazy glutationowej w swinskim plynie pecherzykowym w odniesieniu do wielkosci pecherzyka, statusu porodowego loch, polozenia jajnika i pory roku
    Autorzy:
    Lasota, B
    Blaszczyk, B.
    Stankiewicz, T.
    Udala, J.
    Szewczyk, M.
    Matusiak-Bielska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/45154.pdf
    Data publikacji:
    2009
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    pig
    birth status
    oxidative metabolism
    embryo energy production
    reactive oxygen species
    mammal
    oocyte
    embryo
    follicular fluid
    porcine oocyte
    oxidative stress
    glutathione peroxidase
    superoxide dismutase
    porcine follicular fluid
    season
    ovarian location
    gilt
    follicle size
    Źródło:
    Acta Scientiarum Polonorum. Zootechnica; 2009, 08, 1-2; 19-29
    1644-0714
    Pojawia się w:
    Acta Scientiarum Polonorum. Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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