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Wyszukujesz frazę "the function of the forest" wg kryterium: Temat

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    Tytuł:
    Sukcesja dębu w drzewostanach sosnowych na siedliskach borowych
    The oak succession in the pine stand in the coniferous forest habitat
    Autorzy:
    Gniot, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1016532.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    sukcesja roslin
    drzewostany sosnowe
    siedliska borowe
    Quercus
    lesnictwo
    dab
    drzewa lesne
    natural succesion
    oak
    pure pine stand
    coniferous forest habitats
    silviculture
    transformation of the
    stand
    the complexity in the forest vegetation community
    the biological diversity in the forest
    forestry
    headquater
    balanced proecological forest management unit
    the function of the forest
    multipurpose
    forest
    the ecosystem of the forest
    stand varied in species
    biocenosis
    the natural upgrowth
    Opis:
    Permanently balanced forest economy demands today a resignation from a constant model of the forest stand, which preferred the productive function of the forest, mostly without any consideration to its natural values formed by Mother Nature. Implanting on Polish grounds principles of multifunctional forest districts acknowledged as a breeding object of the whole forest ecosystem, giving in that way the forest economy a proecological dimension. Its a result from a general progress of civilization and achievements in forest science; reaching towards the needs and expectations from the society gaining a general acceptation from different environments. One of the fundamental elements implementing the ecosystem is to rebuild deformed and artificially barred forest phytocenosis. This refers especially to pure pine stands on habitats, in which trophoism potential explains breeding habitats species variety. A good help for the forester in this area can be a natural succesion of good, noble broad−leaved species like for example the oak. Succesion of this species takes on a special meaning in poor habitats, in which it without any special imposes enriches the biocenose with the whole positive outcome accompanying this process; it can also be a valuable clue to the potential fertility in the habitat and the complexity in the forest vegetation community. An important task is to lead the way for the oaks development from succesion to its fullest use as a natural presence in creating the future forest generation. The article below is devoted to this question describing the natural up growth of the oak in pine stands on the coniferous forest habitats in Forest District Różanna and the methods and results in which they are used for breeding.
    Źródło:
    Sylwan; 2007, 151, 05; 60-72
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena ekonomiczna retencyjnych właściwości lasu
    Economic valuation of the water storage capacity of forests
    Autorzy:
    Tyszka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989798.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    retencja wodna
    mala retencja wodna
    ocena ekonomiczna
    forest
    water storage
    price of water
    valuation of the water−storage function
    Opis:
    The article attempts to calculate the economic value of the natural water storage capacity of forests. The impact of forests on the volume of the river runoff and on the delay of the water cycle from the precipitation to the runoff was an indicative measure of storage capacity of the forest. Data from long−term research aimed at determining forest−water interactions in small catchments were used. Four weakly−correlated parameters of runoff characteristics were determined, reflecting the scale of retention capacities of forested areas. These parameters included mean annual runoff (HR), coefficient of the annual runoff irregularity of (HRmax/HRmin), summer to winter half−year runoff ratio (HL/HZ) and the volume of the discharge (Wq/Sq). Equations were developed interpreting the range of changes of the parameters with the increase of forest cover from 0 to 100% (fig. 1−3), and the volume of water stored by the forest per 1% of the forest cover per year was calculated. Using simplifying assumptions, the total volume of water stored per hectare of the forest in the average year was calculated to 9.05 m³. The unit cost of 1 m³ of water was determined on the basis of the lowest price which the State Forests (in the territory of the Garwolin Forest District) spent to increase the volume of the water stored in small reservoirs. No difference was made between natural and artificial water storage in terms of utility. According to such simplified calculations, the natural storage capacity of forests was estimated at 1,089 PLN per year. Apart from the water storage function, forests provide other benefits resulting from a wide range of hydrological, water−protecting effects. Water resources safeguard, inter alia, the sustainable development of forests: affect the climatic conditions, reduce the level of environmental contamination. These functions can be intensified through the use of appropriate methods of forest management.
    Źródło:
    Sylwan; 2015, 159, 06; 483-490
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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