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Wyszukujesz frazę "ekologia roślin" wg kryterium: Temat


Wyświetlanie 1-10 z 10
Tytuł:
Cis pospolity [Taxus baccata L.] w naszych lasach wczoraj i dzis
Autorzy:
Dobrowolska, D.
Farfal, D.
Powiązania:
https://bibliotekanauki.pl/articles/813840.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
Taxus baccata
wystepowanie
ochrona gatunkowa
cis pospolity
lesnictwo
ekologia lasu
odnowienia naturalne
ekologia roslin
drzewa lesne
Źródło:
Sylwan; 2002, 146, 07; 37-47
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ budowy strefy ekotonowej lasu na fitoróżnorodność
Influence of the forest ecotone structure on the phytodiversity
Autorzy:
Gamrat, R.
Gałczyńska, M.
Powiązania:
https://bibliotekanauki.pl/articles/991132.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ekologia lasu
lasy
ekotony
roznorodnosc roslin
Puszcza Wkrzanska
forest
ecotone zone
phytodiversity
wkrzańska primeval forest
Opis:
The objective of the presented studies carried out in the Wkrzańska Primeval Forest (north−western Poland) was to determine the influence of ecotone structure on phytodiversity. Basing on data from three transects, it was shown that the inappropriate structure causes reduction in the number of plant species and communities as compared to typical forest phytocoenoses. It also results in the increase of non−forest flora from nitrophilous and meadow habitats.
Źródło:
Sylwan; 2014, 158, 01; 34-40
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biologia i ekologia przyplaszczka granatka Phaenops cyanea [F.] [Col., Buprestidae] - aktualny stan wiedzy
Autorzy:
Sowinska, A.
Powiązania:
https://bibliotekanauki.pl/articles/46327.pdf
Data publikacji:
2006
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
zwalczanie szkodnikow
wystepowanie
Phaenops cyanea
szkodniki roslin
ekologia zwierzat
entomologia lesna
ochrona lasu
lesnictwo
przyplaszczek granatek
Źródło:
Leśne Prace Badawcze; 2006, 3; 83-98
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad morfologia postaci przedimaginalnych oraz bionomia i ekologia kosmika sosnowiaczka - Ocnerostoma piniariella Zell. [Lepidoptera, Argyresthidae]
Autorzy:
Borowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/820871.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
szkodniki roslin
ekologia zwierzat
entomologia lesna
morfologia
poczwarki
kosmik sosnowiaczek
lesnictwo
jaja
bionomia
larwy
Ocnerostoma piniariella
motyle
Źródło:
Sylwan; 2001, 145, 08; 85-91
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:
Przestrzenny rozkład opadu cetyny oraz przyrostu pierśnicy w drzewostanach sosnowych rosnących po likwidacji ogniska reprodukcji cetyńców Tomicus piniperda (L.) i T. minor (Hart.)
Spatial pattern of insect−induced needle drop and dbh increment in pine stands before and after liquidation of sawmill and landing
Autorzy:
Borkowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/1026407.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewostany sosnowe
rozklad przestrzenny
Tomicus minor
Tomicus piniperda
szkodniki roslin
cetyniec mniejszy
cetyniec wiekszy
lesnictwo
piersnice drzew
ekologia lasu
opad cetyny
przyrost drzew
ecology
tomicus piniperda
t. minor
dbh increment
Opis:
The studies were conducted in the years 1992−1996 and 2001−2002 in the Węgle Forest Sub−district, Zagnańsk Forest District. The aim of the studies was to compare the spatial pattern of needle drop caused by Tomicus sp. and the dbh increment in pine stands before and after the liquidation of the sawmill and timber landing. Eight zones at different distances from the sawmill were distinguished: I – edge zone, II – 100 m, III – 300 m, IV – 500 m, V – 700 m, VI – 900 m, VII – 1100 m and VIII – 2000 m (control). The needle drops were collected from each zones using under−canopy plots of 4 m². in size and drilling into trees at the dbh using a Suunto increment borer. Research results confirmed the significant effect of the reproduction centres of Tomicus sp. on the losses in tree increments. The higher significant values of the needle drop during the functioning of the timber landing were related to the lower values of the dbh increment, and with the low needle drop following the liquidation of the landing the increment values were levelled in first zones.
Źródło:
Sylwan; 2003, 147, 06; 87-92
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ dębu czerwonego Quercus rubra L. na populacje paproci w różnych typach fitocenoz leśnych
Impact of northern red oak Quercus rubra L. on ferns populations in different forest phytocoenoses
Autorzy:
Zarzycki, W.
Wilczek, Z.
Woźnica, P.
Folcik, L.
Lewandowska, A.
Gancarek, M.
Powiązania:
https://bibliotekanauki.pl/articles/989730.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ekologia lasu
fitocenozy lesne
las gradowy
kwasna dabrowa
buczyna
drzewa lesne
dab czerwony
Quercus rubra
allelopatia
oddzialywanie na rosliny
runo lesne
paprocie
wystepowanie
populacje roslin
competition
interference
allelopathy
temperate forests
biodiversity
Opis:
Northern red oak (Quercus rubra) is the most common alien tree species in Polish forests that is considered as an invasive one. It is native to North America. Negative impact of Q. rubra on natural habitats in Europe is well−known, but there is still a lack of information about correlations between red oak and individual species or groups of plants. Especially knowledge about impact of Q. rubra on fern communities is still unsatisfactory. The goal of research was to check if ferns could be neutral to the negative oak impact. In order to verify, populations of ferns occurring in patches of forests dominated by northern red oak and population from natural forests with the same abiotic conditions were compared. Moreover, quantitative relations between ferns and other herb species were analyzed. The research was carried out in southern Poland. Field surveys were conducted in 100 m² plots with domination of Q. rubra. Plots were settled in 3 different types of plant communities: mixed broadleaf forest, acidophilous oak forest and acidophilous beech forest. In the same types of plant communities, but without northern red oak, control plots were located. Control patch was settled in place with similar inclination, exposition, altitude and water regimes. For each surface list of all herb species with their percentage coverage and biometric measures of fern fronds were made. At maximum 50 specimens of each fern species were taken into account. Plots were located in areas of 3 geographical regions: the Śląskie Foothills, the Oświęcimska Basin and Śląska Upland. Results show that ferns in monocultures of the alien oak are bigger, more lush and their coverage is higher than in the control plots. What is more, coverage of other herb species and species diversity are significantly higher in control patches. It suggest that ferns are not sensitive to Q. rubra influence, so it can be concluded that they are competitive to other species which are sensitive to northern red oak impact.
Źródło:
Sylwan; 2015, 159, 08; 658-665
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:
Do czego służą badania na stałych powierzchniach w Białowieskim Parku Narodowym?
What is the use of studies carried out on the permanent plots in the Bialowieza National Park?
Autorzy:
Bobiec, A.
Powiązania:
https://bibliotekanauki.pl/articles/1294369.pdf
Data publikacji:
2016
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
ekologia lasu
Bialowieski Park Narodowy
lasy
stale powierzchnie obserwacyjne
badania naukowe
ekosystemy lesne
dynamika ekosystemow
sukcesja naturalna
szkodniki roslin
kornik drukarz
gradacja
ecological disturbances
ecological history
plots’ representativeness
spatial scale
spruce bark beetle outbreak
stand
dynamics
Opis:
The purpose of the strictly protected area of the Białowieża National Park (BNP) established in early 1900s, was to protect a compact block of the Białowieża forest from any direct human influence and activity. Its founders considered it a “laboratory of nature.” In 1936, five rectangular plots with a total area of ca. 15.5 ha (ca. 0.3% of the BNP) were set up for regular monitoring of stand development with regards to the initial state and variability of soil conditions. During the first 76 years of the project, a steady increase in the proportion of hornbeam and lime tree at the expense of shade-intolerant species was observed. This trend has been interpreted by the researchers involved in the monitoring of the permanent BNP plots to constitute a biodiversity-threatening development caused by preservation efforts. Such an interpretation has been widely incorporated in the public debate by political authorities and the forestry sector. In this critical article I challenge the major arguments presented by the key expert in silviculture, prof. B. Brzeziecki. My criticism is directed at the methodological approach as well as at the data interpretation.
Źródło:
Leśne Prace Badawcze; 2016, 77, 4
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-10 z 10

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