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Register a new userStudying of some factors affecting the plant species diversity in Quercus calliprinos Webb. Maquis at the eastern Versants of the Syrian Coastal Mountains
دراسة بعض العوامل المؤثرة في التنوع الحيوي النباتي في ماكي السنديان العادي Quercus calliprinos Webb على السفوح الشرقية للجبال الساحلية في سورية
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Aِl-Baath University ورقة بحثية
Publication date
2016
fields
Forestry and Ecology
and research's language is
العربية
Created by
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يهدف هذا البحث إلى دراسة التنوع الحيوي النباتي في ماكي السنديان العادي على السفح الشرقي للجبال الساحلية في سورية من الناحية التركيبية و محاولة تحديد أهم العوامل المؤثرة فيه.
This research aims to studying the plant species diversity in the oak Maquis at the Eastern versants of the coastal mountains in Syria, and tries to identify the most important factors affecting this diversity.
References used
SARIC, T. ROGOSIC, J. PROVENZA, F. ZUPAN, I. TKALCIC, S. FRANIN, K. SIKIC, Z. IVANKOVIC, S. HERCEG, N 2014 Mediterranean Shrub Diversity and its Effect on Food Intake in Goats. Italian Journal of Animal Science , Vol. 13. 581-587
WANG, S. and CHEN. H 2010 Diversity of northern plantations peaks at intermediate management intensity. Forest Ecol. Manag., Vol. 259. 360-366
YANAI, R.D. TWERY, M.J. and STOUT, S.L. 1998 Woody understory response to changes in overstory density: thinning in Allegheny hardwoods. Forest Ecology and Management , Vol.102. 45-60
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This study aims to construct a mathematical model to calculate the form factor of
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model can help foresters to precisely estimate the volume of tree and forest
stands.
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of different densities and site qualities covering all conditions of region grown on, were
felled.
Diameters at different heights of the felled shoots were measured; shoots volumes
and volumes of equivalent cylinders were calculated, and consequently the values of shoot
form factor were computed. The dataset was randomly split into two parts, 70% (90
shoots) of the data for constructing form factor model and 30% (39 trees) for model
validation.
Several form factor models were developed using the non-linear regression equations
in the statistical program SPSS. Best fit to the data was selected and value of the
coefficient of determination adjusted (R²adj) was about 0.77. The model has been validated
using several statistical methods, the relative bias of the best model ( e%) was ca. -3.6 %,
while the value of model accuracy ) % x m ) was 15%. In order to obtain lower value of
model relative bias and higher value of accuracy, it’s recommended to use a larger
database comprising all distribution areas of oak Maquis in Syria.
This research aims to test some equations, used in different regions and forest types,
for assessing the total height of shoots in the oak )Quercuscalliprinos) Maquis forests,
depending on diameter,which enable the estimation of volumes without mea
suringthe
height of these shoots. This is very important to saveefforts, time and moneyinvested by
foresters.
The study included102 samples distributed within the most important oak forests on
the eastern exposition of the coastal mountains. The plots have rectangular shape with 50
shoots at least. The plots vary in shoot density, soil fertility and Maquiage. In each sample
we measured the diameter at a height of 30 cm, the total height of (10-20) shoots of various
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The Studay was aimed at surveying the plant species growing in Al
Qunaitera region, their dynamic distribution, environmental characteristics
and economic values.
Atotale number of 268 species were found belonging to 170 genera at 46
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Only two of the founded species weren’t reported by Mouterde in his flora
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This study was conducted in many natural sites in Al-Bayer and Al-Bassitregions
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mensuration) associated with silviculturetreatments, and plant diversity in the herbaceous
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species number and abundance(using Braun-Planquetindices)were recordedin each plot.
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characteristics was more important on the vegetation composition than on the species
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instead ofthe traditional index.
This study aimed to examine the extent of disclosure in the annual
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