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Wyświetlanie 1-15 z 365
Tytuł:
Aktywność żerowiskowa nietoperzy w różnych fazach rozwojowych drzewostanów sosny zwyczajnej
Foraging activity of bats in Scots pine stands in different growth stages
Autorzy:
Węgiel, A.
Grzywiński, W.
Ciechanowski, M.
Jaros, R.
Kmiecik, A.
Kmiecik, P.
Wegiel, J.
Powiązania:
https://bibliotekanauki.pl/articles/989345.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany sosnowe
sosna zwyczajna
Pinus sylvestris
fazy rozwojowe
zreby
uprawy sosnowe
drzewostany sredniowiekowe
drzewostany dojrzale
nietoperze
Chiroptera
roznorodnosc gatunkowa
aktywnosc zerowania
chiroptera
foraging activity
habitat use
forest management
pinus sylvestris
western poland
Opis:
Scots pine (Pinus sylvestris L.) is economically the most important tree species in Polish forestry. Congeneric pine stands have a quite low level of biodiversity, and logging with clear sites may even cause their further decline. It is very important to discover the influence of clear−cuttings in managed pine stands on different groups of organisms. One of them are bats which play an important role in forest biotopes as a regulator of insect pests. The aim of this paper is to compare the foraging activity of bats in pine stands of different stages of growth. The study was carried out in three complexes of pine forests in western Poland: Drawska Forest, Notecka Forest and Dolnośląskie Forests. Four types of growth phases were studied: clear−cut sites (Z), young plantations in the age 2−5 years (U), 41−60−years−old stands (III) and mature stands in the age over 80 years (V). The study of the foraging bat activity was conducted with broadband ultrasound detectors Pettersson D−1000X within 3 hours after sunset in summer periods of 2013 and 2014. The recordings were analyzed with BatSound software. Total 19 180 bat passes were recorded on all 120 sampling plots. 11 bat species: Nyctalus noctula, Pipistrellus pipistrellus, Eptesicus serotinus, P. nathusii, Myotis myotis, P. pygmaeus, M. nattereri, Barbastella barbastellus, N. leisleri, E. nilssonii and Vespertilio murinus and four groups of species: NEV (Nyctalus, Eptesicus, Vespertilio), MSP (Myotis), PSP (Pipistrellus), and PLE (Plecotus) were recognized (tab. 1). The dominant was common noctule N. noctula (71.5%). The highest foraging activity of bats was recorded in open areas: clear sites and plantations (fig. 1), next in mature stands and middle−aged stands. The obtained results suggest that bats can adapt to a mosaic of habitats created by clear−cutting harvesting system in managed pine forests.
Źródło:
Sylwan; 2016, 160, 09; 767-776
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mimic - kolejny krok w strone insektycydow selektywnych
Autorzy:
Skrzecz, I.
Lutyk, P.
Rodziewicz, A.
Garbalinski, P.
Powiązania:
https://bibliotekanauki.pl/articles/816118.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
agonisci ekdysteroidow
insektycydy selektywne
srodki ochrony roslin
ochrona lasu
Mimic 240 LV
lesnictwo
Źródło:
Sylwan; 1998, 142, 11; 21-25
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kształtowanie się przyrostu grubości jodeł z Gór Świętokrzyskich
Radial increment of silver fir from the Swietokrzyskie Mts.
Autorzy:
Bruchwald, A
Dmyterko, E.
Bijak, S.
Łukaszewicz, J.
Niemczyk, M.
Wrzesiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/989406.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
sloje przyrostu rocznego
analiza dendrochronologiczna
Gory Swietokrzyskie
drzewostany jodlowe
jodla pospolita
Abies alba
przyrost drzew
przyrost grubosci
przyrosty radialne
czynniki srodowiska
czynniki klimatyczne
zanieczyszczenia przemyslowe
abies alba mill.
tree−rings
increment reduction
increment release
disturbances
Opis:
The paper presents the dendrochronological analysis of silver firs (Abies alba Mill.) growing in the canopy layer of the forest stands. We searched for the similarities in the rhythm of radial growth of studied trees and we analysed the response of these stands to the increment disturbances related to the occurrence of adverse climatic factors and the pressure from industrial pollution. The research material was collected in 30 pure and uneven−aged silver fir stands located in the Świetokrzyskie Mountains (central Poland). We investigated the effect of age of the stands and the conditions for their growth (location, forest habitat type) on an average tree−ring width. In order to detect similarities in the rhythm of radial growth of the surveyed stands, we grouped the raw chronologies by the means of the cluster analysis, using Ward's agglomeration procedure with 1−r distance (r – Pearson correlation coefficient). We assessed the incremental response of the investigated stands to the disturbances (situations of significantly reduced radial growth) using indicators of resistance, recovery and resilience proposed by Lloret et al. [2011]. We also studied the influence of the stand age and the forest habitat type on the response of analysed for stands to the detected disturbances. The shortest chronology consisted of 94 tree−rings, while the longest one of 137. Average length of the obtained silver fir chronologies was 119 years. Older fir stands characterised with narrower rings (r=–0.451, p=0.012). Neither the location, nor the forest habitat type are the factors determining the similarity of the rhythm of radial growth of silver firs from the Świętokrzyskie Mountains (p=0.243 and p=0.967 respectively). The extreme climatic conditions responsible for the majority of the short−term (one−year−long) incremental depressions are the factor of regional importance, which affects the growth of investigated trees. Older stands characterized with better possibilities of increment recovery after the disturbance than younger stands (p<0.001), which may be a result of the production of secondary crowns. No consistent differences in the indices of resistance and resilience were found among analysed stands.
Źródło:
Sylwan; 2016, 160, 11; 893-904
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wlasciwosci fizykochemiczne oraz cechy budowy mikroskopowej drewna brzozy porazonej przez Piptoporus betulinus [Bull.Ex Fr.] P.Karst.
Autorzy:
Krutul, D.
Kozakiewicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/814792.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
grzyby
czynniki chorobotworcze
porek brzozowy
drewno brzozowe
brzoza
budowa mikroskopowa
wlasciwosci fizykochemiczne
Piptoporus betulinus
biodegradacja
lesnictwo
drzewa lesne
Źródło:
Sylwan; 1998, 142, 04; 49-60
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trinet P jako innowacyjna metoda ochrony drzewostanów świerkowych przed kornikiem drukarzem
Trinet P as an innovative method in the protection of Norway spruce stands against Ips typographus (L.)
Autorzy:
Grodzki, W.
Skrzecz, I.
Powiązania:
https://bibliotekanauki.pl/articles/987108.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany swierkowe
swierk pospolity
Picea abies
ochrona lasu
ochrona przed szkodnikami
kornik drukarz
Ips typographus
pulapki feromonowe
alfa-cypermetryna
pulapki Trinet P
bark beetles
picea abies
forest protection
pheromone trap
alpha−cypermethrin
Opis:
The lack of effective methods of forest protection against bark beetles in Norway spruce stands was the reason for undertaking the studies aimed at the assessment of efficacy of pheromone traps Trinet P that act as an ‘attract and kill' system to reduce the population of spruce bark beetle Ips typographus (Col.: Curculionidae: Scolytinae). The Trinet P trap consists of a triangular stand, on which the net containing alpha−cypermethrin is stretched. Each trap is baited by the synthetic pheromone attracting I. typographus beetles, which fly towards the trap and die due to the contact with the net coated with insecticide. The experiments were conducted in 2011−2012 on 6 experimental plots located in 26−82−years−old Norway spruce stands in Beskid Sądecki Mts. (southern Poland) that were threatened with the bark beetles. The experimental plot consisted of 100 m long stand edge exposed to bark beetle attack, with set of 5 traps installed in line. Similar stand edges without traps were used as control. The experiments were assumed before the I. typographus swarming, i.e. at the turn of April and May of each year. The treatment efficacy was estimated after 5 months by counting infested trees on plots with treatment and control variants. In the most cases the protective effect expressed by significantly lower number of infested trees on the edges with Trinet P traps. The symptoms of infestation by I. typographus were found up to 20% of trees in the stands protected with the Trinet P traps, while more than 80% of trees were attacked by the spruce bark beetle on the control plots. Despite these differences, the infestation density of trees in the stands protected and unprotected with traps was similar. No effect on non−target organisms was observed. The effectiveness of Trinet P traps is similar as of commonly used pheromone traps, thus this novel device can be used for the protection of Norway spruce stands against I. typographus.
Źródło:
Sylwan; 2017, 161, 01; 34-39
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 365

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