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Wyświetlanie 1-11 z 11
Tytuł:
Praktycznie o malej retencji wodnej w Nadlesnictwie Kaliska
Small retention in Kaliska Forest District seen from the practical point of view
Autorzy:
Frydel, K
Powiązania:
https://bibliotekanauki.pl/articles/881711.pdf
Data publikacji:
2008
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
lesnictwo
Nadlesnictwo Kaliska
lasy
mala retencja wodna
efekty ekonomiczne
efekty ekologiczne
Opis:
W latach 80. XX wieku zniknęło około 100 ha śródleśnych jezior, oczek wodnych i bagien z drzewostanów Nadleśnictwa Kaliska położonych na wielkim polu sandrowym pozostawionym po ostatnim zlodowaceniu. W tym czasie nie dociekano przyczyn tego zjawiska. Późniejsza analiza możliwych przyczyn zniknięcia wody wskazuje na melioracje gruntów rolnych przyległych do lasów, poszukiwania złóż metodą echo-sejsmiczną i niekorzystne zmiany klimatyczne. Odtworzenie wód powierzchniowych i przywrócenie właściwego poziomu wód gruntowych możliwe było dzięki kanałowi czarnowodzkiemu, który w połowie XIX wieku został wybudowany na tym terenie z rozkazu króla Prus Fryderyka Wilhelma IV. Doprowadzenie wody do wyschniętych zbiorników pozwoliło na przywrócenie w nich życia biologicznego i zwiększenie bioróżnorodności. Wzrosła też produkcyjność drzewostanów i ich odporność. W efekcie można było, w oparciu o odtworzone zbiorniki wodne, rozpocząć restytucję cisa pospolitego i wprowadzać na znacznie większej powierzchni gatunki liściaste, tak pożądane w tutejszych monolitach sosnowych.
In the 80s of 20 century you could find about 100 hectares of in-forest lakes, ponds and swamps disappeared from area of Kaliska District region which has been located on a huge outwash field left after the last glaciation. At that time there were no investigations leading to find the reasons of the situation. Later analyzes which were carried on, showed the water disappearance might have been caused by drainage of rural areas which were stuck to the forests, searching with echo–seismic method and unfavourable climatic changes. The regeneration of superficial water and regenerating to the right level of the ground – water was possible only by Czarna Woda Canal built on that area in the middle of 19th century on the way of order the Prussian King Frederick Wilhelm 4. Leading – in the water made a possibility of regeneration of biological life in the dried reservoirs and increase crop. The tree growth increased as well as its hardness. As the result of the above impact, it was possible, basing on regeneration of the reservoirs to start regeneration of yew – tree and expand on a larger area of deciduous tress so desired on pine monoliths.
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2008, 10, 2[18]; 87-98
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potencjalne korzysci i zagrozenia zwiazane z wprowadzeniem do lasow obcych gatunkow drzew
Autorzy:
Szwagrzyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/824663.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
gatunki obce
skutki ekologiczne
Polska
lasy
lesnictwo
ochrona przyrody
introdukcja
drzewa lesne
Źródło:
Sylwan; 2000, 144, 02; 99-106
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potencjał terapeutyczny lasu - badania i gospodarka leśna
The therapeutic potential of forests - research and forest management
Autorzy:
Wodzicki, T.J.
Powiązania:
https://bibliotekanauki.pl/articles/2136483.pdf
Data publikacji:
2021
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
lasy
potencjal terapeutyczny
czlowiek
nisze ekologiczne
natura
forest therapeutic potential
human ecological niche
Nature
Opis:
The therapeutic potential of the forest results mostly from the accumulation of volatile organic compounds produced by the forest plants. These compounds are found in the highest concentration in the air space between the soil and the tree canopy and they are important cofactors in the regulation of various physiological processes of the human body. Both, the chemical structure as well as the regulatory function of these substances, are already known, or have been studied by pharmacologists and biochemists. What is not known, however, is the spatial variability in concentration of these compounds in the air of forest ecosystems and its dependence on the genetic or developmental structure of the biocenosis. This presents a challenge, which can only be overcome by forest research institutions ready to adopt new methodology, which is needed in order to study the spatial distribution of therapeutic potential within the forest environment. The main outcome of such research should be updated guidelines for the management of silviculture. Some concepts useful for establishing appropriate research programs are suggested in this paper. In line with these concepts, aspects of evolution of the human ecological niche idea associated with forestry management, and the idea of the human place in nature, are also discussed.
Źródło:
Leśne Prace Badawcze; 2021, 82, 2; 69-74
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena zmian produkcyjnych funkcji lasu w świetle zachodzących zagrożeń ekologicznych
Ocenka izmenenijj proizvodstvennykh funkcijj lesa v svete vojanikajushhikh ekkologicheskikh ugroz
Evaluation of changes of production functions of the forests in the light of taking place ecological threates
Autorzy:
Kaminski, E.
Powiązania:
https://bibliotekanauki.pl/articles/812387.pdf
Data publikacji:
1991
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy
zagrozenia lasu
zagrozenia ekologiczne
funkcje lasu
funkcje produkcyjne
gospodarka lesna
pozyskiwanie drewna
drewno
zmiany jakosciowe
Źródło:
Sylwan; 1991, 135, 07
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
"Fokusowe" gatunki w ochronie przyrody w lasach
"Focal" species in nature protection in forests
Autorzy:
Zawadzka, D.
Drozdowski, S.
Zawadzki, G.
Madej, W.
Pierchala, P.
Soltys, A.
Powiązania:
https://bibliotekanauki.pl/articles/881676.pdf
Data publikacji:
2017
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
lesnictwo
ochrona przyrody
lasy
gatunki chronione
bielik
bobr europejski
gluszec
wilk
zubr
cis
dab
dab Bartek
znaczenie kulturowe
znaczenie ekologiczne
znaczenie spoleczne
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2017, 19, 1[50]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dziuple w ekosystemach leśnych: formowanie, rozmieszczenie, znaczenie ekologiczne i wskazania ochronne
Cavities in forest ecosystems: formation, distribution, ecological importance and recommendation for protection
Autorzy:
Zawadzka, D.
Powiązania:
https://bibliotekanauki.pl/articles/986661.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy
ekosystemy lesne
dziuple
wystepowanie
znaczenie ekologiczne
drzewa dziuplaste
zalecenia ochronne
cavities
cavity formation
cavity−dependent species
protection of cavity trees
Opis:
Cavities are important, natural components of forest ecosystems, conditioning the high level of biodiversity. They are formed either as a result of a natural process of wood decay caused by fungi or as excavations made by woodpeckers Picidae. Distribution and density of cavity trees are regionally diversified and dependent on species composition and age of the stands as well as the management way. In the global scale, decay cavities are much more numerous than those created by woodpeckers. Natural cavities dominated in deciduous forests, whilst woodpeckers−made ones – in coniferous stands. The density of cavities increases along the age gradient due to the growing size of trees and their worse health condition. Cavities in natural forests are more numerous than in commercial, managed ones. This is caused by the removal during the thinning of trees reduced in health, attacked by insects, fungi or mechanically damaged, which are potential places for the creation of cavities. The other reason is a too low age of the final cutting. Moreover, in the managed forest, cavity trees are often removed during sanitary cuttings, although leaving them is recommended. In European forests, the density of cavities is from less than 1 to almost 100 per ha. Natural cavities dominated in most of the studied plots. In Poland, their density varied from less than 1 to 16 per ha. Cavities are habitats and breeding sites of many specialized species of animals from invertebrates to mammals, fungi, and plants. In Poland, cavities are used by about 40 bird species, about 20 mammal species, as well as several hundred species of insects. According to the Polish forestry regulations, trees with cavities should be left to natural destruction, but there are no detail recommendations how to search for such trees and what is their required density. The recommendation to leave cavity trees will not contribute to the increase in their number in managed forests, unless one provides wider availability of adequately large trees with a reduced condition. In Polish forests, actions should be taken to increase the number of potential trees, in which cavities may be formed. They should be designed at the stage of tending for young stands. The minimal density of cavities in managed forests should be in the range of 1−3 per ha in coniferous and mixed forests up to 100 years old and above 3−4 per ha in stands older than 100 years, while in deciduous forests these values should equal to 2−5 per ha and 4−6 per ha in younger and older stands respectively.
Źródło:
Sylwan; 2018, 162, 06; 509-520
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przystosowanie drzew, lasów i leśnictwa do zmian klimatycznych
Adaptation of trees, forests and forestry to climate change
Autorzy:
Chmura, D.J.
Howe, G.T.
Anderson, P.D.
St.Clair, J.B.
Powiązania:
https://bibliotekanauki.pl/articles/1009278.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
zmiany klimatyczne
skutki ekologiczne
lasy
drzewa lesne
strategie adaptacyjne
gospodarka lesna
zarzadzanie
rozwoj zrownowazony
adaptation strategy
management
resistance
resilience
sustainable forestry
Opis:
Ongoing climate change will likely expose trees and forests to new stresses and disturbances during this century. Trees naturally adapt to changes in climate, but their natural adaptive ability may be compromised by the rapid changes projected for this century. In the broad sense, adaptation to climate change also includes the purposeful adaptation of human systems, which includes forestry. In this article, we briefly review the expected impacts of projected climate change on trees and forest ecosystems in Poland. We further provide a framework for designing adaptive strategies to sustain or enhance forest growth, health, and ecosystem services in new climates. Within this framework, we distinguish two related objectives: (1) adaptation of decision−making process in forest management and (2) adaptation of forest ecosystems. Each of these objectives may be achieved through strategies and options whose applicability is discussed in relation to major forest functions – ecological and societal, commercial, and multiple−use. Knowledge gaps and research needs are also identified. We conclude that the recent emphasis on sustainable multifunctional forestry and the current ownership structure in Poland will facilitate adaptation of Polish forests to future climates. However, much remains to be learned about the impacts of climate change, especially at the ecosystem level. Cooperation between researchers and forest managers is critical for developing better management strategies for adapting forests to climate change.
Źródło:
Sylwan; 2010, 154, 09; 587-602
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Awifauna lęgowa dojrzałych drzewostanów Puszczy Boreckiej i jej zmiany na przełomie XX i XXI wieku
Breeding avifauna of mature forest stands in the Borki Forest and its dynamics at the turn of the 21st century
Autorzy:
Rakowski, G.
Czarnocki, K.
Ukalska, J.
Powiązania:
https://bibliotekanauki.pl/articles/1294672.pdf
Data publikacji:
2016
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
Puszcza Borecka
lasy
fauna
ptaki
gatunki legowe
grupy ekologiczne
zgrupowania zwierzat
bogactwo gatunkowe
zageszczenie zwierzat
wykaz gatunkow
Borki Forest
bird assemblage structure
species richness
density changes
forest habitats
Opis:
The composition and structure of the breeding bird community in the Borki Forest in north-eastern Poland were investigated during two separate periods: 1994–1996 and 2012–2014. Bird censuses were carried out in three plots located in mature oak-hornbeam, ash-alder and mixed coniferous forest stands. A standard combined mapping technique for estimating the number of breeding birds was applied. A total of 74 bird species bred at least once within any plot during 1994–1996 or 2012–2014. The structure of the bird assemblages on particular plots displayed a high degree of similarity, exceeding 75%, which means that they represent essentially the same bird community. However, the investigated assemblages have changed substantially over the 20 years. Both, the number of breeding bird species and the population densities on all plots, were much higher in 2012–2014 than in 1994–1996. The mean number of breeding species on all plots was over 50% higher in 2012–2014 than in 1994–1996, whereas the mean total density of breeding pairs increased by more than 60%. Total population densities on the plots increased as a result of an increase in population densities of individual bird species combined with an increase in the number of breeding species. Due to different rates of population growth for certain species, also the composition of dominating species group have changed. The observed changes in the avifauna of the Borki Forest were most probably due to an enrichment of the forest habitats structure, which was caused by natural factors, such as ageing of forest stands, forest succession and a change in water regime by beaver dams, as well as by forest management, including group felling within or in the vicinity of plots and uncovering of the forest edge.
Źródło:
Leśne Prace Badawcze; 2016, 77, 3
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Próba oceny wpływu szerokości szlaków turystycznych na otaczające je środowisko lasu
An attempt to assess the effect of tourist trail width on adjacent forest environment
Autorzy:
Skłodowski, J.
Bartosz, S.
Dul, L.
Grzybek, D.
Jankowski, S.
Kajetanem, M.
Kalisz, P.
Korenkiewicz, U.
Mazur, G.
Myszek, J.
Ostasiewicz, M.
Primka, B.
Puczyłowska, I.
Radzikowski, M.
Roeding, P.
Serek, B.
Powiązania:
https://bibliotekanauki.pl/articles/1009663.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
turystyka
zwiezlosc gleb
wskazniki ekologiczne
oddzialywanie na srodowisko
wysokosc
runo lesne
lasy
erozja gleb
lesnictwo
szlaki turystyczne
tourist trails
environmental changes
soil compaction
erosion
height of herbaceous vegetation
plant life forms
indicator figures
Opis:
The impact of narrow (up to 2 m), medium (up to 3.5 m) and wide (>3.5 m) tourist trails on the surrounding environment was investigated. On wide trails, the value of soil erosion and compaction indices was found to be the highest, while the herb height index was the lowest indicating the greatest impact of wide trails on the environment. The phytosociological relevés were used to determine ecological indicator figures. Wide trails were characterized by higher thermal and continentalism indices and lower pH and trophic indices. The proportion of therophytes and geophytes was higher, while of hemicryptophytes, phanerophytes and chamaephytes on wide trails were lower than on medium and narrow trails. All the analysed indices pointed to a stronger impact of wide trails on the environment in comparison with medium and narrow trails.
Źródło:
Sylwan; 2009, 153, 10; 699-709
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regulacja jako współczesna forma aktywnej ochrony przyrody
Regulation as a modern form of active nature protection
Autorzy:
Poznański, R.
Powiązania:
https://bibliotekanauki.pl/articles/1009078.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
ochrona przyrody
ochrona bierna
ochrona czynna
lasy
formy ochrony przyrody
regulacja uzytkowania rebnego
uzytkowanie rebne
skutki ekologiczne
lesnictwo
gospodarka zrownowazona
passive and active forms of nature protection
new "philosophy" of forest protection
forest sustainability
the modern form of active forest protection
Opis:
The paper presents the negative effects of passive nature protection and demonstrates that some groups of ecologists seem to still ignore these facts. The paper shows that, according to the new 'philosophy' of nature protection, there is neither a real climax biocoenosis nor the state of equilibrium in nature, and that natural succession is not in fact possible. Therefore the return to nature by creating national parks and nature reserves is not realistic. The sustainability of forests cannot be ensured by banning their access, or through their passive conservation, but by regulating the mutually interrelated biological processes, like regeneration, survival, and loss of trees and stands. The abandoning of exploiting non−renewable raw materials, like ore, sand, coal or stone deposits will undoubtedly contribute to their protection and preserve them for the generations to come. However at the same time forbidding the use of renewable forest resources will not support their protection, but will rather upset and interrupt their existence, until their final death. Only active, regulatory activity by man can save the endangered and rare species and natural ecosystems, including forests, from extinction. The common belief that sustainable existence and permanence of many plant and animal species is not possible without human support and regulation should prevail both in forestry and in modern nature protection.
Źródło:
Sylwan; 2010, 154, 10; 684-693
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-11 z 11

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