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Wyświetlanie 1-4 z 4
Tytuł:
Zagrożenie mezofauny powodowane turystycznym zaśmiecaniem lasów
Danger to invertebrate mezofauna caused by the tourism related forest littering
Autorzy:
Skłodowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/973908.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
turystyka
butelki
puszki
mezofauna
lownosc
leśnictwo
zagrożenia lasu
zagrożenia zwierząt
bezkręgowce
invertebrates
littering
tourism
Opis:
The experiment analysed magnitude and structure of invertebrate fauna caught in different empty bottles and cans left by tourists in the four different forest ecosystems. Empty boxes that previously had contained several types of beverage (mineral water, apple juice, bread derived dark brown beverage, coke and beer) were installed. Each bottle was repeated three times. They were subsequently examined on three occasions for invertebrates every two weeks. A total of 1069 specimens belonging to 27 species or taxa were captured. The highest catchability was recorded in fresh mixed coniferous forest. The presence of saprophagous and predatory species in the emptied beverage boxes suggests the establishment of detritus trophic chains. The species composition similarity of invertebrates captured in the empty bottles depended on the site fertility and, only to a minor degree, on the type of beverage. The PCA showed that another factor influential in the species composition of captured fauna was the degree of transparency of the box. The dominant species was A. sterocorosus; this beetle was most frequently captured in the mixed coniferous forest type. The experiment showed very high danger for the forest invertebrate fauna from the side of empty bottles left by tourists.
Źródło:
Sylwan; 2011, 155, 04; 261-268
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Średnia biomasa osobnicza zgrupowań biegaczowatych w produkcyjnym cyklu drzewostanów bukowych w Dolinie Ruhry (zachodnie Niemcy)
Mean individual biomass of carabid assemblages in the productive cycle of beech forests in the Ruhr Valley (Western Germany)
Autorzy:
Schreiner, A.
Powiązania:
https://bibliotekanauki.pl/articles/1006304.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Dolina Ruhry
drzewostany bukowe
owady
biegaczowate
Carabidae
lownosc
srednia biomasa osobnicza
carabidae
mib
beech forest
succession
logistic growth
Opis:
Number of carabid beetles, length of C. violaceus elytra and MIB of all carabids were studied subsequent to pitfall−trapping in 14 beech stands of increasing age (1−165 years) in Western Germany. The beech stands seemed to offer fairly constant feeding conditions for C. violaceus (and relatively small decrease in rather low level of degradation in the plantation). In total, 5,536 carabid individuals were trapped, which revealed significant increase of MIB (from 156.88 to 733.63 mg) following the logistic growth function. Due to incomplete degradation of the stands (on 'rich' soil and after using specific beech−harvesting techniques), there is a high baseline MIB at t=0 and an early onset of regenerative succession. The curve's gradient is steep and MIB reaches final value of about 650 mg in timber stands. Such high value may be explained by the good quality of loam soils in the area under study. In conclusion, logistic MIB function was calculated that describes regenerative beech succession on 'rich' soil and may help foresters to identify areas of disturbed succession.
Źródło:
Sylwan; 2012, 156, 11; 833-842
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czy łowność i długość ciała dwóch gatunków żuków zależą od stopnia zaburzenia drzewostanu?
Do catch rate and body length of two dung beetles species depend on the severity of the stand disturbance?
Autorzy:
Skłodowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/985714.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy
stan srodowiska
bioindykatory
zukowate
Geotrupidae
zuk lesny
Anoplotrupes stercorosus
zuk wiosenny
Trypocopris vernalis
dlugosc ciala
lownosc
anoplotrupes stercorosus
trypocopris vernalis
litter layer
environmental variables
lai
Opis:
The catch rate and body length of Anoplotrupes stercorosus and Trypocopris vernalis were studied in 2018 on permanent plots established in 2003 in Scots pine stands left for spontaneous succession in the Piska Forest (N Poland). The plots comprised treatment A – severely disturbed stands (canopy cover of 10−30%), treatment B – moderately disturbed stands (canopy cover of 40−60%) and treatment C – the least disturbed stands in which all or nearly all trees survived (canopy cover of 70−90%). Each treatment class was replicated six times. In addition, we included a Scots pine plantation established in 2006 after the soil preparation as a stand in the earliest phase of succession. The following hypotheses were set: (1) severity of stand disturbance affects the body size of both species and (2) in the surviving remnants of stands (later phase of succession development) the body length of both species is greater than in disturbed stands and in the young plantation. No differences between the catch rate of both species in different treatments was detected (tab. 1 and 2). However we found significantly longer body of T. vernalis. The increase in the difference between the length of both species in the least disturbed stands as well as in the late stages of stand development was found (fig. 1 and 2). The direct effect of the LAI and inversely proportional effect of soil temperature on the catch rate and length of the body of A. stercorosus and, to a lesser extent, T. vernalis were observed (fig. 1). The high catch rate of A. stercorosus and the length of its body was linked with the soil covered only with forest litter (which occurs in dense stands with a high LAI index) (fig. 2). The catch rate of T. vernalis was correlated with the predominant nitrophilous Deschampsia fexuosa, which suggests the preferential occurrence of T. vernalis in ‘open’ stands with a high level of solar radiation. In turn, the length of T. vernalis body correlated with a high proportion of Calluna vulgaris, which may suggest a dependence of this parameter on light reaching the soil. The above observations indicate that in the production cycle of Scots pine stands, T. vernalis prefers open stands (especially clear−cuts, young plantations), while A. stercorosus is more often met in dense stands. The catch rate of both species is not suitable for zooindication research, while the length of their body is suitable. The higher the stage of ecological successive of the pine stand, the greater the difference in the body length of these species.
Źródło:
Sylwan; 2019, 163, 05; 425-434
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Występowanie i przemieszczanie się biegaczowatych na zrębie z pozostawionymi kępami starodrzewu
The distribution and movement of ground beetles on a cutting area with retained old-growth clumps
Autorzy:
Skłodowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1013543.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
gatunki nielesne
Puszcza Czluchowska
lesnictwo
bioindykacja
drzewostany sosnowe
kolonizacja
gatunki lesne
kepy drzew
bioindykatory
biegaczowate
wedrowki zwierzat
lownosc
zrab zupelny
Carabidae
cutting area
old−growth clumps
carabidae
movement
colonisation
semivariogram
Opis:
The colonisation and movement of ground beetles on a cutting area with two retained old−growth clumps of 4 and 7 are were investigated using the CMR method. The method enabled to evaluate the trapping level of small non−forest species. The paper discusses the use of old−growth clumps during the colonisation of the cutting area by big forest species and concurrent "avoidance" of these areas by small non−forest species. Stimulating role of the parallel and perpendicular ploughing furrows in the process of the colonisation the cutting area by forest and non−forest species as well as differences in their perception of site micro−differences were also analysed. The results confirmed assumed hypothesis in case of non−forest species (avoidance of clumps), forest species C. arcensis and non−forest species P. caerulescens and individuals from the genera Amara and Harpalus as far as the influence of furrows is concerned. Differences in the perception of the cutting area between forest and non−forest species were also proved.
Źródło:
Sylwan; 2008, 152, 09; 31-43
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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