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Wyszukujesz frazę "ecosystem stability" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Biological volarisation of the Southern Baltic Sea (Polish Exclusive Economic Zone)
    Autorzy:
    Weslawski, J.M.
    Warzocha, J.
    Wiktor, J.
    Urbanski, J.
    Bradtke, K.
    Kryla, L.
    Tatarek, A.
    Kotwicki, L.
    Piwowarczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/48130.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Polish Exclusive Economic Zone
    ecosystem stability
    Baltic Sea
    biodiversity
    biological valuation
    marine habitat
    Opis:
    A biological valuation system to assess the value associated with ecosystem stability and richness (and not that from the point of view of users) is proposed to provide scientific decision support for marine protected areas and marine spatial planning. The system is based on the assessment of individual species and habitat/species assemblages. An extensive set of recently collected (2007–08) and archival (1970 –2000) data on the occurrence of marine benthos was analysed for the PolishMarine Areas. Based on matching data sets of sediments, the euphotic zone, temperature and salinity, as well as fetch and sea current values, a GIS model was used to visualise the results; a map indicates the two areas which are considered to be biologically the most valuable (Puck Bay and the stony shallows of the central coast).
    Źródło:
    Oceanologia; 2009, 51, 3; 415-435
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problematyka stabilności ekosystemowej w rozwoju lasu wyłączonego z gospodarki leśnej
    Problems of ecosystem stability in the development of the forest excluded from commercial forest production
    Autorzy:
    Miś, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023137.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    ekosystemy lesne
    stabilnosc
    lasy wylaczone z gospodarki lesnej
    lesnictwo
    ecosystem stability
    forest development
    development model
    Opis:
    The paper presents an outline of problems associated with dynamic ecosystem stability viewed from the angle of a forest which was completely excluded from productive utilisation. The following notions were distinguished: forest stability, stand stability and managed forest stability. The author's own interpretation of forest development was presented. The model portrays the development of the forest and the role of self−regulation as a negative and positive feedback. The relationship between the effect of self−regulating capabilities and the effect of ecosystem resistance to de−stabilising actions was taken into consideration.
    Źródło:
    Sylwan; 2004, 148, 06; 30-37
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problem masowego zamierania drzewostanów świerkowych w Leśnym Kompleksie Promocyjnym "Puszcza Białowieska"
    Problem of a massive dying-off of Norway spruce stands in the 'Bialowieza Forest' Forest Promotional Complex
    Autorzy:
    Brzeziecki, B.
    Hilszczański, J.
    Kowalski, T.
    Łakomy, P.
    Małek, S.
    Miścicki, S.
    Modrzyński, J.
    Sowa, J.
    Starzyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/985913.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lesne kompleksy promocyjne
    Lesny Kompleks Promocyjny Puszcza Bialowieska
    drzewostany swierkowe
    stan sanitarny
    zagrozenia drzewostanow
    szkodniki roslin
    kornik drukarz
    Ips typographus
    dynamika populacji
    gradacja
    drewno martwe
    grzyby patogeniczne
    zagrozenie pozarowe
    zamieranie lasow
    norway spruce bark beetle infestation
    białowieża forest
    ecosystem stability
    multifunctional forestry
    natura 2000 plc200004
    natural values
    world heritage site
    Opis:
    The Białowieża Forest (BF) is in many respects an exceptional object, of a great importance for nature protection and forest management, at the international scale. The BF plays also a key role from the point of view of regional development and welfare of local community. In the last period, a big threat for multiple values of the BF has arisen, as a result of enormous bark beetle infestation, which started in 2012 and has killed 1.4 million m3 of spruce trees. In the paper, first, a brief overview of the general history of the BF and an account of long−term human impacts on its functioning and structure is provided. Next, the history of bark beetle infestations in the BF is analysed. It is shown that, in the period 1992−2007, the average volume of spruces killed by bark beetle amounted on average to 20,000 m3 of wood annually. During that period practically all dead trees were removed from the forest by means of salvation cuttings. Starting from 2008, more and more trees infested by European spruce bark beetle were left in the forest, in a result of a pressure exerted by environmental groups. In 2012, Minister of Environment decided to reduce the allowable cut, determined in forest management plans elaborated for the managed part of the BF, from 107,000 to 48,500 m3/year. This decision, along with several other regulations and restrictions, made in practice impossible to stop the development of a current bark beetle infestation, which started in 2011 and intensified during the next 6 years (solely in 2016 bark beetles killed 480,000 m3 of spruce trees). In the paper, the most important implications and consequences of the current situation are briefly summarized and discussed. A special attention is given to the problems concerning: 1) protection of Natura 2000 species and sites (endangered by bark beetle outbreak), 2) a negative influence of large amounts of spruce deadwood on forest soils, 3) threats caused by pathogenic fungi, 4) question of public safety, 5) fire hazard, and 6) economical dimension. The legal and socio−economical foundations of the functioning of Hajnówka, Browsk and Białowieża forest districts comprising the managed part of the BF, as well as their most important environmental and social consequences are discussed too. Among others, it is indicated that, under current conditions of the BF, human intervention plays a key role in maintaining stable and compositionally diverse woodland communities. Finally, several suggestions and recommendations are provided, aimed at, in the short term, breaking off the current bark beetle outbreak, and, in the long term, at maintaining a multifunctional character of the BF and its ability to provide all important ecosystem services on a sustainable basis.
    Źródło:
    Sylwan; 2018, 162, 05; 373-386
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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