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ŠUMARSKI LIST 6-8/1993 str. 74     <-- 74 -->        PDF

Prpić, B., N. Komlenović & Z. Seletković (1988): Propadanje šuma
u SR Hrvatskoj. Sum. list 112 (5—6): 195—215.
Rauš , Đ. (1990): Sukcesija šumske vegetacije u bazenu »Spačva« u razdoblju
1970—1989. god. Šum. list 114 (9—10): 341—356.
Traenkner , H. (1985): Integrierte Waldzustandserfasung. IUFRO Conference:
Inventorying and Monitoring Endangered Forests. Zuerich: 273—276.
Traenkner, H. & A. Troycke (1988): Der Einsatz von CIR-Luftbild Programmen
in Bayern. AFZ (1—3): 17—20.

Forest Damage Status and Certain Environmental Factors in »Spačva«
Forest Region (Croatia)


At first it was stated that the forest decline inventory methods using CIR
AP-s with full coverage deliver statisticaly secured data for small inventory units,

e. g. forest stands. This data enable conclusions about dependence of damages
on environmental factors. The terrestrial sample methods are more appropriate
for big inventory unist (Tab. 1).
Performing the forest decline inventory in the forest region »Spačva« (Fig. 1)
using CIR aerial imagery (date 20., 07. 1989, film Aerochrome Infrared 2443 Kodak,
Camera LMK 305/23 Zeiss Jena, mean scale 1 : 6123, strip lenght 49,8, number of
P-s 99) a connection between damages and certain environmental factors was
observed. The interpreted species were: pedunculate oak (Quercus pedunculate!
Erh.)< narrow-leated ash (Fraxinus angustofolia ssp pannonica Soo & Simon),
hornbeam (Carpinus betulus L.) and other deciduons species together.

Terrestrially cartographed forest plant communities (1) Carpino betuli-Quercetum
roboris typicum Rauš 1971, (5) Genisto etatae-Quercetum roboris aceretosum
tatarici Rauš 1971, (6) Genisto elatae-Quercetum roboris caricetosum remotae Ht.
1938, (8) Leucoio-Fraxinetum angustifoliae typicum Glav. 1959, (10) Frangulo-Alnetum
glutinosae typicum Rauš 1971, (11) forest clearings & marches, where compared
with demages. It was found that (6) is the most and (5) the least damaged,

(1) is somehwere between (Tab. 2, Graph. 1). The plant communities succession
determined by two successive observation in the terrain (1970 & 1989) was compared
with damages found on AP-s. The most damaged were the forest stands
where moist plant communities change to dryer ones (Tab. 3, Graph. 2).
The damage status was determined along natural and man-made linear
objects in forest. Along meliorated marshes, public rouds and channels the damages
are high, along natural streams and simple forest roads are much smaller.
The moderate damages along the higway Lipovac — Zagreb are probably due to
the undisturbed natural hidrology and´or the accomodation possibility of younger
stands to environmental changes (Tab. 4., Graph. 3).

Ke y words : lowland oak forests, Spačva (Croatia), forest decline, plant
communities succession of vegetation, photointerpretation, CIR-aeroal photography.