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Wyświetlanie 1-15 z 53
Tytuł:
Konwencje ustalania wskaźników zróżnicowania lasów
Conventions of determining indicators of forest diversity
Autorzy:
Poznański, R.
Powiązania:
https://bibliotekanauki.pl/articles/1012411.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
metoda przyrodnicza
metody obliczen
drzewostany roznowiekowe
lasy
lesnictwo
metoda geometryczna
wskazniki zroznicowania
geometric and natural convention of determining indicators of forest diversity
uneven−aged forest
diversity characteristics
Opis:
There are two conventions of determining indicators of forest diversity: geometric and natural. Indicators in the geometric convention are determined from the ratio of differences in the values of the real characteristic to the value of the characteristic adopted as a comparative norm. Indicators in the natural convention are determined from the ratio of differences in the values of a characteristic in the real world to the mean value of that characteristic by standard deviation. The indicator−based assessment of forests in Poland is based on the geometric convention of similarities and standards included in yield and stand volume increment tables. This convention of similarities (map and plan scales) taken directly from technology has no natural justification. Therefore, it is necessary to determine indicators of forest diversity based on natural convention with special reference to the uneven−aged forests based on natural forests.
Źródło:
Sylwan; 2008, 152, 01; 53-57
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność genetyczna drzewostanów sosny czarnej (Pinus nigra Arn.)
Genetic diversity of the black pines stands [Pinus nigra] Arn.
Autorzy:
Jagielska, A.
Cwalina, M.
Prus-Głowacki, W.
Powiązania:
https://bibliotekanauki.pl/articles/1016651.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
sosna czarna
zmiennosc genetyczna
izoenzymy
lesnictwo
Pinus nigra
drzewa lesne
pinus nigra
isoenzymes
genetic diversity
Opis:
The purpose of our study was to analyse genetic diversity, species variability and the levels of genetic variation in 392 trees which come from 15 natural populations and 8 domestic provenances from the Kórnik and Niepołomice provenance trial. Isoenzymes from 12 enzyme systems were examined using starch gel (6 PGD, ACP, DIA, FEST, G6PD, GDH, GOT, IDH, MDH, ME, PGI, SKDH). Among domestic populations, provenance Stary Kraków exhibited the highest level and provenance Wschowa – the lowest level of genetic diversity. The genetic similarity index calculations were based on Nei and Hedrick index. Results were presented as dendograms of genetic distances. The dendrograms revealed that the Krosno provenance is genetically similar to ssp. laricio while the remaining provenances under analysis may have represented ssp. austriaca.
Źródło:
Sylwan; 2007, 151, 05; 23-31
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cechy i wskaźniki zróżnicowania lasów różnowiekowych w różnych stadiach rozwoju
Characteristics and indicators of uneven-aged forest diversity at different developmental stages
Autorzy:
Poznański, R.
Powiązania:
https://bibliotekanauki.pl/articles/1013549.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
metody obliczen
drzewostany roznowiekowe
zroznicowanie
lesnictwo
stadia rozwojowe
wskazniki zroznicowania
characteristics and indicators of forest diversity in natural convention
uneven−aged forests
developmental stages
Opis:
The paper presents the results of assessment of the characteristics and indicators of uneven−aged forest diversity based on natural convention for different stages of development. The assessed characteristics and indicators included: the average diameter at breast height, natural self−thinning of trees, relative and real stocking and the variation in dbh distribution structure.
Źródło:
Sylwan; 2008, 152, 09; 21-30
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zróżnicowanie genetyczne czereśni ptasiej (Prunus avium L.) w Polsce
Genetic diversity of wild cherry (Prunus avium L.) in Poland
Autorzy:
Szyp-Borowska, I.
Zawadzka, A.
Zajaczkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/972788.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
czeresnia ptasia
Prunus avium
zroznicowanie genetyczne
metody badan
metoda RFLP
markery mikrosatelitarne
wild populations
cpDNA and SSR diversity
Prunus avium L.
Opis:
The purpose of our study was to estimate genetic diversity of Prunus avium in natural populations. Genetic studies were carried out in 27 wild cherry populations sampled from several Polish tree stands. Chloroplast DNA variation was assessed and two haplotypes were identified. Theirs distribution divided populations into two groups. Haplotype H1 was present in 11 of 27 populations and H2 in 16 populations. The PCR− −SSR technique was used to detect nuclear DNA diversity. Three highly polymorphic SSR (microsatellite) primer pairs were used to describe the genetic variation. Heterozygosity values ranged from 0.500 to 0.633, while gene diversity (PIC) from 0.75 to 0.79. This study demonstrated that SSR fingerprinting with cpDNA diversity, can be used for preliminary characterization of Prunus avium populations.
Źródło:
Sylwan; 2012, 156, 07; 502-510
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zróżnicowanie genetyczne wybranych populacji sosny zwyczajnej (Pinus sylvestris L.) na podstawie analiz RAPD
Genetic diversity of Scots pine (Pinus sylvestris L.) Polish provenances based on RAPD analysis
Autorzy:
Nowakowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/973034.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewa leśne
leśnictwo
within− and among population genetic diversity
Scots pine
RAPD analysis
metoda RAPD
sosna zwyczajna
Pinus sylvestris
genetyka roślin
populacje roślin
zróżnicowanie genetyczne
Opis:
Genetic diversity is one of the key requirements for the adaptive potential of forest trees. This study presents the analysis of 30 Polish Scots pine provenances. According to the RAPD method, three 10−mer primers: OPE−08, OPE−09 and OPF−07 (Operon Technologies) were used to generate most polymorphic bands of amplified DNA among 450 individuals. The genetic similarity index was calculated after Nei (1987) matching coefficient and results were presented as dendrogram of genetic distances obtained from cluster analysis (UPGMA) for all populations. The Scots pine provenances were also characterized by height and diameter at the breast height „DBH” traits and were compared with the genetic diversity level. All studies populations were characterized by genetic diversity GST=0,215. This coefficient of inter−popu− lation variation was lower than the level of the differentiation within populations (HT=0,262), as it was reported for other Pine species. The results from these studies may be useful to the forest practice to help with decisions on the establishment of stable forest stands; they are also used in the forest genetic resources conservation programmes.
Źródło:
Sylwan; 2003, 147, 11; 26-37
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Różnorodność gatunkowa jako wskaźnik przemian roślinności w bieszczadzkiej kwaśnej buczynie górskiej
Plant species diversity as an indicator of vegetation changes in acidophilous mountain beech forest
Autorzy:
Durak, T.
Powiązania:
https://bibliotekanauki.pl/articles/973949.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
Bieszczady Zachodnie
leśnictwo
zbiorowiska leśne
zmiany użytkowania
kwaśna buczyna górska
runo leśne
róznorodność gatunkowa
wskaźnik równomierności
liczba gatunków
wskaźnik Shannona H
diversity indices
evenness index
changes in forest
forest regeneration
eastern carpathians
Opis:
The intensity of disturbance plays a key role in shaping the biodiversity and hence it is a good tool for assessing community changes occurring in the Western Bieszczady, an area depopulated after World War II. Based on sampling of acidophilous mountain beech forest phytocoenosis repeated after 50 years, an analysis of plant biodiversity changes was conducted. The study focused on changes in the number of species, Shannon’s indicator, spatial distribution and coverage of specific ecological groups of species. The results confirm an undergoing process of regeneration of straitened phytocoenoses from 1958−1961, in which a slow improvement of the trophic conditions can be observed.
Źródło:
Sylwan; 2011, 155, 12; 843-850
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zrównoważone użytkowanie różnorodności biologicznej współczesną formą ochrony przyrody
Autorzy:
Grzywacz, A.
Powiązania:
https://bibliotekanauki.pl/articles/1022647.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lasy
rozwoj zrownowazony
roznorodnosc biologiczna
lesnictwo
ochrona przyrody
biological diversity
polish forests
large−scale nature conservation
Opis:
The author refers to the contemporary understanding of the terms: biological diversity, sustainable development, nature conservation. The most recent information about biological diversity of Polish forests was presented on the landscape, habitat, species and gene level. Differences were shown between sustainable use of biological diversity treated as the contemporary form of nature conservation and traditional conservation and biocoenotic methods. The author pointed out to difficulties in and lack of acceptance of the large−scale form of nature conservation in forests by some circles of professional nature conservationists.
Źródło:
Sylwan; 2005, 149, 05; 10-22
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wprowadzenia modrzewia na różnorodność i liczebność chrząszczy ściółkowych w borach mieszanych na terenie Litwy
Effect of larch admixture on forest litter beetle (Coleoptera) communities diversity and number of carabid individuals in mixed coniferous habitats of Lithuania
Autorzy:
Tamutis, V.
Skłodowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1008707.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Litwa
drzewostany mieszane
drzewa lesne
gatunki domieszkowe
modrzew europejski
Larix decidua
sciolka lesna
owady
chrzaszcze
Coleoptera
liczebnosc
zroznicowanie gatunkowe
hibernating beetles
larch
litter
species diversity
Opis:
During winter time, beetle individuals were collected from soil samples taken from a Scots pine culture, an old−growth Scots pine forest, and a European larch culture and old−growth. The following research questions were put forward: (1) Does an admixture of larch in the forest stand contribute to increase in species diversity as well as the numbers of beetle individuals hibernating in the forest litter? (2) Does an admixture of larch in the forest stand result in an increased proportion of beetle species – potentially pests for the forest trees, in the carabid communities? We analyzed data with use PCA, Ward method. The first question should be answered positively. The second question should be answered negatively. The analyses of beetle fauna overwintering in the forest litter as carried out in this paper confirmed the purposefulness of larch introduction as an admixture in pine stands in Lithuania.
Źródło:
Sylwan; 2012, 156, 08; 581-592
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zróżnicowania mikrosiedliskowego boru świeżego na liczebność odnowienia naturalnego sosny zwyczajnej (Pinus sylvestris L.)
The influence of microsite diversity of fresh coniferous forest on number of Scots pine [Pinus sylvestris L.] natural regeneration
Autorzy:
Gmyz, R.
Skrzyszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1009508.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
sosna zwyczajna
Pinus sylvestris
odnowienia naturalne
siewki
naloty
podrost
warunki mikrosiedliskowe
bor swiezy
pinus sylvestris
natural regeneration
forest floor vegetation
indicator species
microsite diversity
Opis:
The paper analyses the relationships between the microsite diversity of fresh coniferous forest and the number of Scots pine (Pinus sylvestris L.) seedlings from natural regeneration. The competition of forest floor vegetation (mainly of Vaccinium myrtillus) was found to be the decisive factor of pine regeneration. Lichens, especially Cladonia arbuscula and C. rangiferina, as well as mosses, e. g. broom moss (Dicranum scoparium) and pincushion moss (Leucobryum glaucum), can be regarded as the indicator species for the microsite suitable for pine regeneration.
Źródło:
Sylwan; 2010, 154, 03; 173-181
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zróżnicowanie siedliskowe bagiennej olszyny górskiej Caltho laetae-Alnetum (Zarz. 1963) Stuchlik 1968 w Babiogórskim Parku Narodowym
Habitat diversity of the grey alder bog forest Caltho laetae-Alnetum (Zarz. 1963) Stuchlik 1968 in the Babia Gora National Park
Autorzy:
Koczur, A.
Powiązania:
https://bibliotekanauki.pl/articles/973980.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
Babiogorski Park Narodowy
gorska olszyna bagienna
zbiorowiska roslinne
zespol Caltho-Alnetum
zespoly roslinne
zroznicowanie siedliskowe
występowanie
leśnictwo
zbiorowiska leśne
grey alder bog forest
habitat diversity
babia góra national park
western carpathians
Opis:
The grey alder bog forest Caltho laetae−Alnetum occurs in the Babia Góra region in two variants differing in the composition of the tree stand, ground cover and habitat conditions. The variant with Alnus incana is similar to universally met in the Polish Carpathians. In turn, variant with Alnus glutinosa is characterized by a bigger participation of Aconitum variegatum and the presence of plants typical for fens and willow brushwood from the range adler carr.
Źródło:
Sylwan; 2011, 155, 02; 112-119
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zróżnicowanie genetyczne populacji Heterobasidion annosum sensu stricto i Heterobasidion parviporum w wybranych drzewostanach sosnowych i świerkowych w Polsce
Genetic diversity of Heterobasidion annosum sensu stricto and Heterobasidion parviporum in chosen Scots pine and Norway spruce stands in Poland
Autorzy:
Łakomy, P.
Kwaśna, H.
Cieślak, R.
Molińska-Glura, M.
Dalke-Świderska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1006483.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
fitopatologia lesna
drzewostany swierkowe
drzewostany sosnowe
choroby roslin
huba korzeni
Heterobasidion annosum
Heterobasidion parviporum
rozprzestrzenianie sie grzybow
genotyp
zroznicowanie genetyczne
heterobasidion spp.
genetic diversity
pathogen population
Opis:
The study was done in five Scots pine and five Norway spruce stands. Pine stands were infested by Heterobasidion annosum sensu stricto and spruce stands by Heterobasidion parviporum. In all stands the pathogens’ genets were identified. In Scots pine stands 54 genets were found. The biggest one covered area of 160,2 m² and was isolated from 11 stumps. 40% of genets were isolated only from one stump, but in some cases two or three genets colonized the same stump. In Norway spruce stands 55 genets were found. In most cases they were small and only two covered area of 38,5 m² and 40 m². The other ones colonized only one stump or more genets were found in the same stump. Genetic diversity among genets varied from 0 to 77%.
Źródło:
Sylwan; 2012, 156, 04; 270-279
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decyzje urządzania lasu w kształtowaniu różnorodności
Decision - making in forest management planning for shaping biological
Autorzy:
Poznański, R.
Powiązania:
https://bibliotekanauki.pl/articles/1022896.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
podejmowanie decyzji
lasy
roznorodnosc biologiczna
lesnictwo
ksztaltowanie roznorodnosci
urzadzanie lasu
biological diversity
forest categorisation
regeneration
survival and disappearance processes
decision−making
Opis:
In forest management planning the enhancement of forest biological diversity at the genetic, species, ecosystem and landscape levels occurs through making general and specific decisions. The major general decisions concern forest categorisation, division of a forest into management units, choice of a management system and setting silvicultural−management objectives. Specific decisions concern three processes of forests development affecting forest sustainability, i.e. regeneration, survival and disappearance of trees and stands.
Źródło:
Sylwan; 2005, 149, 01; 3-7
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody molekularne stosowane w badaniu różnorodności mikroorganizmów glebowych
Molecular methods used in studies of diversity of the soil microorganisms
Autorzy:
Behnke-Borowczyk, J.
Kwaśna, H.
Belka, M.
Powiązania:
https://bibliotekanauki.pl/articles/1006468.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
mikroorganizmy glebowe
identyfikacja
roznorodnosc biologiczna
metody badan
metody molekularne
ekstrakcja DNA
amplifikacja DNA
biodiversity
microbiota
molecular methods
soil
Opis:
Application of the correct methods of study is essential for a proper description and understanding of natural communities of microorganisms and their relationships. Classical methods used for detection and identification of soil microorganisms resulted in underestimation of the microbiota. It has been claimed that classical methods, based mainly on morphology, led to the identification of only 1% of the soil microbiota, usually species that predominate in culture because of their fast growth and abundant sporulation. Molecular methods allow rapid, accurate, sensitive and cost−effective identification and enumeration of microorganisms. They are designed to replace and/or support classical approaches. This review summarizes some of the current and emerging nucleic acid−based molecular approaches used for detection, discrimination and quantification of microbes in the environment, mostly in soil.
Źródło:
Sylwan; 2012, 156, 04; 294-304
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Różnorodność mikroorganizmów glebowych obszarów chronionych i o znaczących walorach przyrodniczych
Diversity of soil microorganisms on areas under protection or with significant natural values
Autorzy:
Abramczyk, K.
Gałązka, A.
Powiązania:
https://bibliotekanauki.pl/articles/989210.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
mikrobiologia gleb
obszary chronione
obszary o walorach przyrodniczych
gleby
mikroorganizmy glebowe
roznorodnosc biologiczna
biodiversity
soil microorgamisms
protected areas
forests
environment
Opis:
The article presents problems connected with the biodiversity of soil microorganisms occurring on selected protected areas. Based on the literature, authors attempt to explain the concept of biodiversity, the role of soil in the natural environment and the importance of soil microorganisms. The article also presents selected anthropogenic factors that influence microorganisms found in soils under different forms of protection. The large species diversity of soil microorganisms is closely related to their functions in the soil. Soil microorganisms participate in all processes occurring in the soil. They influence humus formation, increase soil fertility, provide plants with nutrients by decomposing organic matter and fight pathogens. The special attention focused on the broad concept of biological diversity as a form of preservation possibly the greatest richness of life on Earth. Ecological conditions prevailing in the different ecosystems affect the modification of the environment and force adaptation of organisms (including microorganisms) into the habitat. To preserve the diversity of the microorganisms, it is important to protect their habitat – the soil. Intolerance to certain environmental conditions and competition between microorganisms causes abnormal functioning of ecosystems and significant depletion of biodiversity. However, the main cause of the microorganisms biodiversity loss is the human pressure on the natural environment. Human activity causes the extinction of many species of plants and animals and has a negative impact on the soil environment. This in turn affects the functioning, abundance and biodiversity of soil microorganisms. In areas with significant natural values such as forests and protected areas (national parks) biodiversity of microorganisms is maintained at a much higher level than in the case of productive soils. The environmental protection leads to the equilibrium in the natural systems and its biotic and abiotic components, including biodiversity. Therefore, the need to create places of special protection such as national parks, nature reserves, landscape parks, etc. is very much justified.
Źródło:
Sylwan; 2017, 161, 06; 496-503
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ trzebieży przerębowej na zróżnicowanie strukturalne drzewostanu
Autorzy:
Bilski, M.
Brzeziecki, B.
Powiązania:
https://bibliotekanauki.pl/articles/1022233.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
dominacja wymiarowa
rozklad piersnic
trzebiez przerebowa
lesnictwo
struktura drzewostanu
rozmieszczenie przestrzenne
drzewa lesne
drzewostany jodlowe
abies alba mill.
angle measure index
bwinpro model
differentiation thinning
diameter distribution
diameter spatial diversity
liocourt−meyer curve
spatial pattern
stand structure
Opis:
The impact of differentiation thinning on various aspects of structure of exemplary Silver fir stand, including overall diameter distribution, diameter spatial diversity, dimension dominance and spatial distribution pattern, is analysed. Comparison of empirical diameter distribution (before and after thinning) with a the−oretical Liocourt−Meyer curve and the results of structural analysis, lead to the general conclusion that in case of relatively simple−structured Silver fir stands, achieving a desired, plenter−like structure is a longterm process, requiring a lot of consistency and patience.
Źródło:
Sylwan; 2005, 149, 04; 21-33
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 53

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