Landscapes Forest and Global Change - ESA - Escola Superior ...

N. Avani et al. 2010. Investigation on mountain landscape parameters on Juniper species growth
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as topography and elevation on the growth of J. occidntalis in the USA. The results show that
settlement and density of trees in upper elevations and in the north aspects has been increased.
Moemeni moghadam (2002), the number of ecologic characteristics of Juniper species was
studied in Shirvan (Khorasan province), and then the results show that slope effect on survival,
number in hectare and form quotient and aspect effect on canopy height to total height and form
quotient and biodiversity.
Our purpose of this study is study of landscape parameters on Juniper growth, that which
parameters have the best effect on this species growth. Therefore in this study the effect of slope
and aspect on the growth of Juniper species was studied.
Material and methods
In the way of Firozkooh (Tehran province) after Homand, in the slopes and elevations of this
region, the stands of Juniper species were determined. Soil depth is low that is 15 to 30 cm, the
altitude is 2600 until 2710 m, dominant species is Juniper in this region. The amount of bearing
fruit trees is very much, but there are very low seedlings in the region. The study area is located
in the Hableroad watershed, in 35◦ 42´ to 35◦ 44´ northern latitude and 52◦ 33´ to52◦ 35´ eastern
longitude.
For doing this study, at the first we distinguished the region in the topography map, then thrown
the inventory network with 100*500 dimension and 40 plots with 0.5 ha area. After that height
and diameter growth variables in the different slopes and aspects were measured. The data were
analyzed in the SAS software and with SNK test.
Results
The results show that the most basal diameter was in southeastern (44.67 cm) and the least basal
diameter was in northwestern (31.57 cm) (figure 1). The results of the means comparison show
that aspect had the significant effect on the height of trees in 1% level of probability and the
most height was in west (6.19m) and the least height was in southwestern (5.12m) (figure 2).
The results of the means comparison in different slopes show that slope had significant effect on
basal diameter of trees in 5% level of probability, and the most basal diameter was in 80% of
slope (40.03 cm) and the least was in 20% of slope (27.84 cm) (figure 3).
In 5% level of probability, slope had the significant effect on height of trees and the most height
was in 55% of slope (7.26m) and the least height was in 15% of slope (5.03 m) (figure 4).
Canopy height had the different significant in different aspects in 1% level and the most canopy
height was in west (6 m) and the least canopy height was in southwestern (5.2 m) (figure 5). The
most canopy diameter was in west (4.57 m) and the least was in west southern (3.57 m) (figure
6).
The results show that slope had the significant effect on the canopy diameter of trees in 5%
level that the most canopy diameter was in 55% of slope (4.57 m) and the least was in 20%
slope (3.6 m) (figure 7). Slope in 5% level of probability had the significant effect on canopy
height and the most was in 55% of slope (7.3 m) and the least was in 15% of slope (5.04 m)
(figure 8).
Forest Landscapes and Global Change-New Frontiers in Management, Conservation and Restoration. Proceedings of the IUFRO Landscape Ecology
Working Group International Conference, September 21-27, 2010, Bragança, Portugal. J.C. Azevedo, M. Feliciano, J. Castro & M.A. Pinto (eds.)
2010, Instituto Politécnico de Bragança, Bragança, Portugal.