Báo cáo lâm nghiệp: "Characteristics of 3rd (Querci-fageta s lat ) and 4th (Fageta (abietis) s lat ) vegetation tiers of north-eastern Moravia and Silesia (Czech Republic)" pps
... level.
Keywords: forest-typological classification system; vegetation tiers; Querci-fageta s. lat. ; Fageta (abietis) s. lat. ; charac-
teristics of forest ecosystems; north-eastern Moravia and Silesia; ... pre-
sented by 3
rd
(i.e. geobiocenoses of Querci-fageta s. lat. ) and 4
th
(Fageta (abietis) s. lat. ) vegetation tiers in north-eastern...
... length.
Statistical analysis
To determine whether the volume of CWD of dif-
ferent types, decay classes and size classes differed
among these three successional forests, successional
stage was considered ... (m
3
.ha
–1
)
Log Snag Stumps
Fig. 3. e volume of CWD in each decay class along a suc-
cessional chronosequence in Northern forests of Iran
Late-successional stage
Mid-s...
... METHODS
2.1. Sampled stands
The stands sampled for this study were selected from a network of
permanent sample plots (PSPs) established by the Ministère des Res-
sources naturelles et de la faune ... PSP
selection was based on several criteria. First, a stand composition cri-
terion was applied to limit the scope of this study to balsam fir stands,
which were defined as stands composed o...
... stands)
of the studied species in the stands should be at least 90%. Most of
the stands were naturally regenerated. The sample plots were estab-
lished in 1989 and 1990. The plots were remeasured ... relative
biases, and the root mean square error (RMSE) were calculated as follows:
( 7)
( 8)
( 9)
(1 0)
where n is the number of observations, and and are observed and...
... misclassified, 45 as spruce and 22 as rowan. For
the class soil destruction (e
1
= 0.4 9) 49% pixels was
misclassified as stony debris. e most commit-
ted classes were rowan (e
2
= 0.6 4), soil destruction ... confu-
sion matrix would be zero, indicating no misclassi-
fication. From the matrix also classification errors of
omission and commission as well as KHAT statistic
for si...
... part of research could be carried
out on lying trees.
e forest stands were coppice converted into
high stands on gentle slopes of south western aspect.
e parent rock of the sites consisted of ... rot and classified as
attacked.
Collected data were processed with statistical soft-
ware Statistica 6.0. Means and standard deviations
were calculated for each characteristic withi...
... 200 7). In
those studies, similar age classes were chosen. In
other studies, individuals are classified accord-
ing to broad age scales, mostly in the categories of
piglet (0–12 months), sub-adult ... (Kol-
mogorov-Smirnov and Lilliefors test for normality)
and for homogeneity of variances (Cochran s, Hart-
ley s and Barlett s tests) were performed. Tukey s
test was used to...
... classes
Pcs/ha
Fagus sylvatica
Abies alba
Fraxinus excelsior
Acer seudoplatanus
PRP 2
(pcs/ha)
Fagus sylvatica
Abies alba
Fraxinus excelsior
Acer pseudoplatanus
500 J. FOR. SCI., 54, 2008 (1 1): ... volume of the assimilatory apparatus – tree
crown. To assess the growing processes of individual
tree species in the primeval forest, an analysis of
relationships between crown volume...
... lower ends of the moustache (Fig. 2) of this
branch was measured after felling. On the inter-disc sections (logs),
the seal length (ls), seal width (ws) and moustache length (lm )of
branch scars were ... analysis software Visilog 5.3 (NOESIS,
Les Ulis, France). In the case of forks (5 out of 16 trees) and for
a given tree height, the discs of both stems were measured and t...