Chemistry

Influence Of Slope Aspects On Woodland Ecosystem Of Duhok

Studies have shown that position of a slope in an ecosystem affect the quality of organic material, soil chemistry, and nutrient cycling, largely. it affects the soil quality than even the type of bedrock beneath the soil (Yimer, Sting and Adelkadir 2006, p.95). Research that has been conducted on influence of topographical features on soils in southern Italy clearly demonstrate that soils originating from the same parent material, with the same vegetative covering and climate, with the only difference being the position of the landscape produced different and varied microclimatic conditions (Chen, Hsieh, Jiang, Hsieh and Sun 1997, p.230).
In the northern temperate climatic zone, the aspect of a slope was found to be a huge influence of the microclimatic conditions of the area mainly influenced by the temperature levels (Coleman, Crossley and Hendrix 2004, p.312). This is because the amount of solar that area experiences will determine the levels of temperature and water in the soil, the inherent characteristics of the soil will be affected (Fu, Liu, Ma and Zhu 2004, p.48). In the Pinus laricio forests of southern Italy, the north-facing slope receives higher insolation and as a result, there is low moisture content that is also connected to the scanty vegetative cover and insolating effects of small vegetation (Gong, Chen, Fu and Wei 2007, p.1).
Differences in the soil microbial activities offer the different type of plant species. These plant species depend on the soil moisture, root activities, temperature and organic matter that return to the soil through the litter that falls from the plants (Gong, Brueck, Giese, Zhang, Sattelmacher and Lin 2008, p.484). Studies have been carried out to determine the effects of climatic conditions on the soil and vegetation properties, however no studies have been carried to determine the influence of aspect in the soil and vegetation properties(Tewksbury and Lloyd 2001, p.426).

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