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    Wyświetlanie 1-6 z 6
    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:
    Dziedzictwo wsi wielkopolskiej - stan zachowania, zagrożenia oraz działania zmierzające do jego ochrony
    Heritage of the Greater Poland Village - Conservation Status, Threats, and Actions to Protect It
    Autorzy:
    Palacz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1189738.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Przyrodniczy we Wrocławiu
    Tematy:
    dziedzictwo
    wieś
    Wielkopolska
    stan zachowania
    zagrożenia
    ochrona
    heritage
    Greater Poland
    village
    conservation status
    threats
    protection
    Opis:
    The material heritage of the Great Poland village should be considered inseparable with the spiritual values. That what is now characteristic for Greater Poland is the result of the centuries-old processes. This is apparent both in the settlement, construction, customs, folklore and cooking. The settlement landscape of Greater Poland was shaped by the medieval settlement, the rise of the feudal manor, various colonization actions from the XVII to the XIX century, including the Olęder settlement, the activity of the Prussian Commission for Settlement. In the XIX century processes of enfranchisement in the form of pooling, separation, and parceling and the industrial development have led to reconstruction of the village. The land reform in the interwar period, from 1925 and the PKWN decree on agricultural reform of 1944 have completed the changes. The clear imprint in all areas of life left the boundary of partition, which divided for over 100 years the homogeneous body which was Greater Poland. Differences between the parts of Greater Poland belonging to the Prussian and Russian partition despite the passage of more than 90 years, are still visible. The rural heritage of Greater Poland is preserved in the spatial configurations, with gables of houses set to the rural road, especially in the southwestern Greater Poland. It's also still the readable Olęder settlement, in the Nadnoteckie areas (marsh lanes - Polish rzędówki bagienne), and in the vicinity of Nowy Tomyśl, Lwówek and Trzciel (the dispersed settlement) and in the Pyzdrska Forest (river floodplains on the Warta and Prosna). Great Poland can boast a very large amount of preserved palaces, mansions, residences, parks and farms. Many of them represent a high artistic, architectural and spatial composition level. The dense settlement network which was already during the Middle Ages caused that there are in Greater Poland a lot of churches, both brick and timber and half-timbered churches, often very valuable. The agricultural landscape is characterized by windmills, mills, sugar mills, distilleries. Monuments of the railways are also noteworthy. Many objects are individually protected by registration in the register of monuments. Only 9 ruralistic formations in the region are listed in the register of monuments. Only 1 cultural park around of Żerków and Śmiełów was established until now. It is necessary to mention the numerous risks, the unfavorable changes which are taking place in a village in the last 20 years. There are also many positive aspects of 145 numerous operations. Just even to mention the Local Action Groups, Village Renewal movement, the Culinary Heritage network, various folk festivals associated with traditional food, etc. This article outlined only in a summary form the problems of an extremely rich and diverse heritage of the village of Great Poland.
    Źródło:
    Architektura Krajobrazu; 2012, 2; 109-123
    1641-5159
    Pojawia się w:
    Architektura Krajobrazu
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chorological and conservation status of the endemic cypress, Cupressus atlantica Gaussen, in the High Atlas (Morocco)
    Autorzy:
    Sekiewicz, K.
    Sekiewicz, M.
    Romo, A.
    Didukh, Y.
    Fennane, M.
    Boratynski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/41144.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    chorology
    conservation status
    endemic plant
    cypress
    Cupressus atlantica
    Cupressaceae
    forest ecosystem
    degraded ecosystem
    High Atlas Mountains
    plant conservation
    plant geography
    Morocco
    Opis:
    We present a study of the distribution, ecology and conservation status of Cupressus atlantica, an endemic tree of the High Atlas (Morocco). The main populations of this species grow in a reduced area along the N’Fiss valley in the Central High Atlas and are gradually receding. Particular populations are increasingly fragmented and the total area covered by the cypress woodland has decreased to less than a third of the surface occupied in the 1930s. Overgrazing reduces the woodlands’ regenerative capacity, and the exploitation of the wood, linked to traditional uses by the rural society of the N’Fiss valley, directly reduces the number of trees. Great efforts being made to protect the species by the Haut Commissariat aux Eaux et Forêts are having some effect in recent years.
    Źródło:
    Dendrobiology; 2014, 71
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ecology and conservation status of Taxus baccata population in NE Chalkidiki, northern Greece
    Autorzy:
    Katsavou, I.
    Ganatsas, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/41599.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    ecology
    conservation status
    Taxus baccata
    European yew
    plant population
    stand structure
    forest regeneration
    radial growth
    Chalkidiki Peninsula
    Greece
    Opis:
    Taxus baccata L. is a rare species threatenedwith extinction in Greece, as in other parts of Europe. This paper deals with the ecological status of the species in the area of NE Chalkidiki northern Greece, where the species appears in one of the greatest populations of the country. Site, standand yew population characteristics were studied in the area that species occupies. Eleven sample plots were marked, and on each plot, the height and diameter at breast height (DBH) were measured for all yew trees, as well as for all the individuals of the rest tree species, with diameter at breast height greater than 4 cm. Tree vitality of all trees was also estimated according to IUFRO classification. Yew radial growth was studied using tree-ring analysis. Tree natural regeneration was investigated within subplots of different dimensions and according to two height classes. Results showed that yew population occurs in stands dominated by beech, presenting a mean density of 301 trees per hectare, with a total population of 430 trees with DBH above 4 cm. It forms the secondary stand, and dominates in the stand understorey, accompanied with Fagus sylvatica and Ilex aquifolium, while it appears rarely in the overstorey. Yew tree vitality was foundto be quite high, and significantly higher than that of beech. Radial growth of the sampled trees follows a slow and constant annual increment gradually decreasing by tree age. Yew natural regeneration was foundto be relatively low, 1341.8 individuals (seedlings and saplings up to 1 m) per hectare. Management and in situ conservation of the species in the area should focus on species protection measures, andon specific silvicultural treatments for creating favourable conditions for species growth.
    Źródło:
    Dendrobiology; 2012, 68
    1641-1307
    Pojawia się w:
    Dendrobiology
    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
      Wyświetlanie 1-6 z 6

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