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Wyszukujesz frazę "Jagodziński, A." wg kryterium: Autor

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    Tytuł:
    Grzyby ektomykoryzowe w obiegu węgla w ekosystemach leśnych
    Ectomycorrhizal fungi and carbon dynamics in forest ecosystems
    Autorzy:
    Kałucka, I.
    Jagodziński, A.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/994508.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    ekosystemy lesne
    obieg wegla
    materia organiczna
    gleby
    grzyby ektomikoryzowe
    biomasa lesna
    carbon sequestration
    carbon flux
    organic matter
    soil carbon
    npp
    ecm fungi
    mycorrhiza
    forest biomass
    Opis:
    In boreal and temperate forests fungi play a particularly important role, since most trees form a symbiotic relationship with many species of ectomycorrhizal (ECM) fungi, providing them with assimilates in exchange for minerals. Mycorrhiza is considered one of the most significant factors affecting functioning of forest ecosystems, and in particular the processes of carbon cycling and storage. ECM fungi are involved both directly through carbon accumulation in the mycelial system, and indirectly through their influence on tree biomass production and organic matter decomposition. The amount of carbon transferred to ECM fungi usually varies from 10 to 25 or even 50% of the host's net photosynthesis, thus they are a group of organisms that significantly affect carbon flow into the soil. Most of that carbon is built into the mycelial system and its structures (fungal parts of ECM roots, extramatrical hyphae and rhizomorphs, sporocarps, etc.). Carbon allocation to the underground part of trees, and thus to ECM roots, changes with stand age and stand development phase. The biomass of active ECM roots and mycelium usually reaches its maximum in young stands, in the canopy closure phase; frequently, this is also true for the standing biomass of fruit bodies. A large share of ECM sporocarps in the forest carbon budget and high levels of ECM vegetative mycelium respiration are considered to be among the main pathways for the release of CO&sub2. from forest soil, indicating a significant role of ECM fungi in fast carbon flow via forest ecosystems. On the other hand, dead ECM fine roots and extramatrical mycelia are a very rich and important pool of sequestered carbon in the soil.
    Źródło:
    Sylwan; 2013, 157, 11; 817-830
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ekologiczne konsekwencje hodowli drzew w różnym zagęszczeniu III. Stabilność drzewostanu, fitoklimat i różnorodność biologiczna
    Ecological consequences of silviculture at variable stand densities. III. Stand stability, phytoclimate and biodiversity
    Autorzy:
    Jagodziński, A.M.
    Oleksyn, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1011879.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wiezba drzew
    zageszczenie poczatkowe
    drzewostany
    roznorodnosc biologiczna
    mikroklimat
    lesnictwo
    ekologia lasu
    stabilnosc drzewostanu
    zageszczenie roslin
    stand density
    spacing
    tree competition
    forest ecology
    stand stability
    microclimate
    biodiversity
    review
    Opis:
    The main goal of this review was to characterize ecological consequences of growing trees at variable stand densities. We analyzed the influence of stand density on its mechanical and biological stability, diversity and biomass of understory plants and microclimate conditions (e.g. temperature, humidity, light, etc.). Higher stand density results in higher susceptibility to wind and snow damage, due to changes in height to diameter ratio (tree slenderness). The mechanical stability of stands may be promoted by silvicultural activities such as light thinning applied before growth stagnation. In addition, the reduction of stand density during stand development may increase biomass allocation to coarse roots that stabilize trees in the soil. High tree density may increase stand susceptibility to pathogens and insects and thus increase tree mortality. Trees growing at higher density (with higher intraspecific competition) may allocate less assimilates for defense against herbivorous insects and pathogens. The effect of tree density on stability of multi−species stands is inconclusive, since such studies were only occasionally undertaken. Since tree density influences light conditions (mainly before canopy closure), there is a negative relationship between stand density and herbaceous species diversity and biomass. Based on the published data, we summarized consequences of silviculture at different stand densities and proposed future directions of research needed to fill the gaps in current knowledge. Understanding the long−term ecological consequences of variable stand densities is essential for development of sustainable and stable forest ecosystems.
    Źródło:
    Sylwan; 2009, 153, 04; 219-230
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ekologiczne konsekwencje hodowli drzew w różnym zagęszczeniu I. Wzrost i rozwój drzewostanu
    Ecological consequences of silviculture at variable stand densities. I. Stand growth and development
    Autorzy:
    Jagodziński, A.M.
    Oleksyn, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1012013.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wzrost drzewostanu
    wiezba drzew
    zageszczenie poczatkowe
    drzewostany
    lesnictwo
    zageszczenie roslin
    rozwoj drzewostanu
    stand density
    spacing
    tree competition
    tree biometry
    stand growth and development
    review
    Opis:
    The main goal of this review was to characterize ecological consequences of growing trees at variable stand densities. We found that the majority of studies were focused on biometry, productivity and mortality of trees, and wood quality and its economic value, while the influence of stand density on biomass allocation, abiotic and biotic factors, chemistry of different tree organs, diversity and biomass of understory plants, ecophysiology of trees and microclimate conditions (e.g. temperature, humidity, light conditions, etc.) were only occasionally addressed. Stand growth and development trajectories are clearly modified by stand density, however the strength of influence depends on the phase of stand development. Lower seedling densities in nursery conditions lead to increases in their height and diameter, thus influencing seedling quality used in afforestation. The positive influence of higher density on diameter and height of trees in younger stages of stand development may be a result of higher probability of seedlings being planted in more favorable microhabitats, improvement of microclimate conditions, earlier crown closure that reduces interspecific competition for nutrient and water resources. Moreover, stand density clearly influences branch diameter and length, and thus knot size. Higher stand density results in earlier crown closure and higher tree mortality, leading to vertical and horizontal changes in stand structure (DBH, height and crown dimensions of trees). In the denser stands slender and flexible trees with small, narrow crowns dominate, and most of the trees belong to the 3rd class according to Kraft' classification of tree social positions in the stand. The influence of stand density on stand structure may lead to changes in biomass partitioning and thus merchantable wood production and nutrient retention in particular tree organs.
    Źródło:
    Sylwan; 2009, 153, 02; 75-85
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Udział węgla w związkach obronnych przed czynnikami biotycznymi u roślin drzewiastych
    Share of carbon in defense compounds against biotic factors in woody plants
    Autorzy:
    Karolewski, P.
    Jagodziński, A.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/994518.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    obrona chemiczna
    substancje obronne
    zawartosc wegla
    carbon concentration
    defense compounds
    woody plants
    trees
    biotic factors
    review
    Opis:
    In addition to physical defenses, chemical defenses are the most effective way to protect plants from adverse biotic factors (phytophagous insects, other herbivores and pathogenic fungi). This requires extra effort from plants to produce secondary defense metabolites at the expense of production of primary metabolites directly linked to the growth and development of plants. There are three main groups of defensive compounds (alkaloids, phenolic compounds and terpenoids). All defensive compounds are rich in carbon. Depending on the chemical formula, carbon makes up from about 40% to over 85% of the molecular weight of various defense compounds. It is not possible to calculate the total carbon mass accumulation in all defense compounds. In this paper we discuss the content of defensive compounds and carbon with respect to defense strategy of plants, functional groups of woody species (coniferous and deciduous trees), tree species, tree biomass components (leaves, branches, bark, roots, etc.) and many other internal (age of trees, age of leaves, stage of development, origin, etc.) as well as external factors, related to soil and climatic conditions.
    Źródło:
    Sylwan; 2013, 157, 11; 831-841
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ekologiczne konsekwencje hodowli drzew w różnym zagęszczeniu II. Produkcja i alokacja biomasy, retencja biogenów
    Ecological consequences of silviculture at variable stand densities. II. Biomass production and allocation, nutrient retention
    Autorzy:
    Jagodziński, A.M.
    Oleksyn, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1011811.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wiezba drzew
    zageszczenie poczatkowe
    mikroelementy
    lesnictwo
    skladniki pokarmowe
    ekologia lasu
    makroelementy
    zageszczenie roslin
    dostepnosc skladnikow pokarmowych
    wymiana gazowa
    drzewostany
    biomasa
    alokacja biomasy
    stand density
    spacing
    tree competition
    forest ecology
    biomass allocation
    nutrient retention
    review
    Opis:
    The main goal of this review was to characterize ecological consequences of growing trees at variable stand densities. Increasing stand density results in rising competition among trees in their below− and above− ground parts, leads to changes in stand structure (DBH, height, crown width and length, crown ratio, tree slenderness, branch diameters and length) and thus modifies biomass partitioning and may influence stand productivity. Trees grown at higher density compete more intensely for limited resources such as space, light, water and nutrients, than in those grown at wider spacing. In general, total tree biomass accumulation is higher in more dense stands and in less dense stands a higher proportion of biomass is allocated to coarse roots. Moreover, stand density may alter foliage distribution within the crowns. For stands grown at higher tree density, leaf area index (LAI) may increase and thus influence stand productivity, however LAI is closely related to light requirements and succession status of the species. Because stand density may simultaneously modify macro− and micronutrient concentration in different tree tissues and biomass partitioning, it may lead to distinct changes in the nutrient balance of the forest ecosystem. For example, a considerable pool of stand mineral elements (including carbon) is allocated to roots that are not subjected to traditional stand management. Therefore, manipulation of stand density leading to higher biomass allocation to roots may increase carbon sequestration in forest ecosystems.
    Źródło:
    Sylwan; 2009, 153, 03; 147-157
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wieku drzew oraz wieku i lokalizacji igieł w koronie na zawartość związków fenolowych w igłach młodych sosen
    Influence of tree age, needle age and location in the crown on the phenolic compounds content in needles of young Scots pines
    Autorzy:
    Karolewski, P.
    Jagodziński, A.
    Grzebyta, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/973958.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    sosna zwyczajna
    Pinus sylvestris
    wiek drzew
    zawartosc zwiazkow fenolowych
    leśnictwo
    drzewa leśne
    igły sosny
    wiek igieł
    warunki świetlne
    stand age
    needle age
    light conditions
    phenols
    pinus sylvestris
    tolerance to biotic factors
    Opis:
    We studied Scots pine stands differing in age to determine the influence of tree age (6−20−year−old), needle age, and needle location in the crown and on the shoot on total soluble phenolic compounds (TPh) content in needles. These compounds are secondary metabolites, which largely determine the resistance of plants to unfavorable biotic factors such as herbivorous insects and pathogenic fungi. Examining the constitutive resistance of needles (without indications of damage), we found a statistically significant positive effect of needles age (1−3−year) and a negative effect of whorl age on TPh content, but only in older needles. We found that in spite of the large influence of the needle's age, the light conditions have a significant positive influence on the TPh content, as indicated by changes in the level of phenols with whorl age, comparing needles of different ages. The tree's age was important, but only when the cleaning was carried out changing the light conditions of needle growth. Moreover, we revealed that in the oldest needles (3−year), the position on the shoot also has a significant influence on TPh content in the needles. The level of phenols is lower in the needles growing on the bottom part of the shoot, which are shaded by needles growing on the upper side of the shoot.
    Źródło:
    Sylwan; 2011, 155, 12; 797-807
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena zgodności rozkładów empirycznych pierśnic drzewostanów bukowych różnych klas wieku z wybranymi rozkładami teoretycznymi
    Goodness of fit evaluation of the breast height diameter distributions of beech stands differing in age with selected theoretical distributions
    Autorzy:
    Jagiełło, R.
    Beker, C.
    Jagodziński, A.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989389.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany bukowe
    klasy wieku
    buk zwyczajny
    Fagus sylvatica
    piersnice drzew
    rozklad empiryczny
    rozklad teoretyczny
    ocena zgodnosci
    diameter distribution
    finite mixture distribution
    beech stand
    fagus sylvatica
    Opis:
    Modelling is one of the basic activities in the field of biological sciences. The main purpose of modelling is to illustrate relationships and phenomena of biological objects (and traits describing them) and present reality as close as it is possible with expected range of error. In the paper we presented results of approximation of the selected theoretical distributions, i.e. singular (normal, log−normal, gamma, two− and three−parameter Weibull, Johnsons SB) and finite mixture (normal, log−normal, gamma and Weibull) to tree diameter distributions in beech stands (Fagus sylvatica L.). The main aim of the study was to evaluate goodness of fit of selected distributions, prove legitimacy of using mixture distributions in even−aged, single−species beech stands and find the best distribution of model diameter distribution in a whole production cycle of this kind of stands. The study was conducted in 32 sample plots located in north−western Poland in stands at the age between 9 and 140. For the evaluation χ² test, a modified error index (e) and a root mean square error (RMSE) were used. We found that the RMSE and e are related in most cases with stand density. Mean values of used indicators show that finite mixture distributions are better in comparison to singular distributions. The best fitted distributions were Johnsons SB and mixture of gamma ones. Range of error index expressed with number of trees per hectare ranges 16.5−32.8% and 7.7−27.0% for this distributions, respectively. Conversely the worst results were obtained by fitting two−parameter Weibull distribution both in singular and mixture. Future diameter distribution model based on the probability distribution should be based on Johnson SB or 3−parameter Weibull distribution from singular ones or gamma from finite mixture. In case of age class apportionment unequivocal the best result were obtained with Johnson SB and partially with mixture gamma distributions.
    Źródło:
    Sylwan; 2016, 160, 02; 107-119
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zawartość węgla w biomasie pospolitych gatunków krzewów podszycia leśnego
    Carbon concentration in the biomass of common species of understory shrubs
    Autorzy:
    Jagodziński, A.M.
    Jarosiewicz, G.
    Karolewski, P.
    Oleksyn, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008422.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    pietro lesne
    podszyt
    krzewy lesne
    leszczyna pospolita
    Corylus avellana
    czeremcha zwyczajna
    Prunus padus
    czeremcha amerykanska
    Prunus serotina
    kruszyna pospolita
    Frangula alnus
    bez czarny
    Sambucus nigra
    deren swidwa
    Cornus sanguinea
    jarzab pospolity
    Sorbus aucuparia
    biomasa
    zawartosc wegla
    carbon concentration
    shrubs
    biomass components
    Opis:
    Experimental data on carbon concentration in woody plant species biomass are very scarce and value of 50% of dry biomass is widely accepted in carbon storage modeling. On the other hand, some studies have proved that the carbon concentration in woody species biomass is variable and depends on the component. Thus, the main goal of the study was to determine carbon concentration in biomass of 7 understory shrub species (basing on 282 individuals): Corylus avellana, Prunus padus, P. serotina, Frangula alnus, Sambucus nigra, Cornus sanguinea and Sorbus aucuparia as well as to analyze variability of carbon concentration among shrub species and biomass components. Carbon concentration was analyzed for leaves, fruits, branches, stemwood, stembark, coarse and fine roots. Our study revealed that the mean carbon concentration in biomass of all species studied was 47.7%. We found statistically significant differences in carbon concentration among the shrub species studied in all biomass components. The mean value for particular species was as follows: Prunus serotina – 47.5%, P. padus – 47.6%, Frangula alnus – 47.7%, Sambucus nigra – 47.7%, Corylus avellana – 47.8%, Cornus sanguinea – 47.8% and Sorbus aucuparia – 47.8%. Additionally, we found statistically significant differences in carbon concentration among biomass components within the species studied. The mean carbon concentration in fruit biomass was 46.2%, in fine roots – 47.0%, in leaves – 47.2%, in coarse roots – 47.7%, in branches – 47.9%, in stemwood – 48.5% and in stembark – 48.6%. The variability of carbon concentration in fruit, branches and leaves biomass was higher than in the remaining biomass components. The variability of carbon concentration in biomass of woody species should be considered in carbon storage modeling in forest ecosystems.
    Źródło:
    Sylwan; 2012, 156, 09; 650-662
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza dendroklimatologiczna przyrostów radialnych inwazyjnych Acer negundo L. oraz Fraxinus pennsylvanica Marshall z doliny Warty
    Dendroclimatological analysis of radial increments of invasive Acer negundo L. and Fraxinus pennsylvanica Marshall from the Warta river valley
    Autorzy:
    Zajdler, M.
    Tyborski, J.
    Dyderski, M.K.
    Jagodziński, A.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/986674.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    gatunki inwazyjne
    klon jesionolistny
    Acer negundo
    jesion pensylwanski
    Fraxinus pennsylvanica
    przyrost drzew
    przyrosty radialne
    analiza dendroklimatyczna
    dolina Warty
    Poznan
    riparian habitats
    dendroclimatology
    alien trees
    radial growth
    Opis:
    Invasive tree species are one of the most important threats to the riparian ecosystems. We aimed to check (1) whether invasive tree species have wider annual radial increments than native species and (2) which climatic factors (describing annual variability of air temperature and precipitations) influence radial growth of the investigated species. The study was conducted in the Warta river valley in Poznań (W Poland). Detrended chronologies were built using 28 cores bored from Acer negundo and 20 from Fraxinus pennsylvanica. Mean annual radial increment of A. negundo was of 3.91 ±0.19 mm and of F. pennsylvanica – 2.76 ±0.08 mm. Radial growth of A. negundo was significantly correlated to precipitation in June of the increment year and temperature in November of the year before the increment. In turn, radial growth of F. pennsylvanica was significantly correlated to precipitation in April and temperature in May and June of the increment year. These factors explained 44 and 55% of variance in radial increments widths of A. negundo and F. pennsylvanica, respectively. Annual radial growth of the alien species studied were higher than in case of native riparian species. Thus, studied invasive species constitute a serious threat for the analysed riparian ecosystems. Obtained results may be helpful for predicting their spread under projected climate change scenarios.
    Źródło:
    Sylwan; 2018, 162, 07; 547-554
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena introdukcji Carya ovata (Mill.) K. Koch na siedlisku grądu w Nadleśnictwie Czerniejewo
    Assessment of Carya ovata (Mill.) K.Koch introduction to the potential oak-hornbeam forest habitat in the Czerniejewo Forest District
    Autorzy:
    Paź, S.
    Czapiewska, N.
    Dyderski, M.K.
    Jagodziński, A.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/985838.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    ekosystemy lesne
    rosliny
    gatunki obce
    introdukcja
    orzesznik pieciolistkowy
    Carya ovata
    zmiany struktury drzewostanu
    siedliska gradowe
    Nadlesnictwo Czerniejewo
    vegetation
    species richness
    light availability
    tree stand structure
    galio−carpinetum
    Opis:
    Alien tree species, due to their longevity, manifest their invasive potential after several decades from introduction. For the high threat to biodiversity, there is a need to analyze the risk of introduction connected with numerous alien tree species introduced in the various forest ecosystems. We aimed to assess the productivity potential and effect of alien Carya ovata on understory vegetation. Our study was conducted in the oldest (122 years old) tree stand of C. ovata in Poland, located in the Czerniejewo Forest District (western Poland). We analyzed C. ovata tree stand features and vegetation traits within the forest community and compared with natural vegetation – oak−hornbeam forest. We found that C. ovata trees had lower dimensions and standing volume than oaks (Quercus robur and Q. petraea) growing in the neighborhood. We also did not find the impact of C. ovata stands on understory vegetation species composition and light availability. Because of the low impact on forest floor vegetation and lack of spread we concluded that C. ovata cannot be classified as an invasive species. Moreover, its introduction was not successful in terms of tree stand productivity.
    Źródło:
    Sylwan; 2018, 162, 01; 41-48
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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