AN INVESTIGATION ON THE EFFECT TOPOGRAPHIC FACTORS ON THE CANOPY COVERAGE AND PRODUCTION OF RANGE SPECIES AT JAHAN-NAMA PROTECTED AREA

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NOUHI S.N.; MESDAGHI M.; HESHMATI G.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2001 | Volume:7 | Issue:4 Page(s): 27-34

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Information Journal Paper

Title

AN INVESTIGATION ON THE EFFECT TOPOGRAPHIC FACTORS ON THE CANOPY COVERAGE AND PRODUCTION OF RANGE SPECIES AT JAHAN-NAMA PROTECTED AREA

Author(s)

NOUHI S.N. | MESDAGHI M. | HESHMATI G. | Issue Writer Certificate

Keywords

TOPOGRAPHY (SLOPE

ASPECT AND ELEVATIONS)

CANOPY COVERAGE

PRODUCTION

UTILIZATION

PROTECTED AREA.

Abstract

To determine the effects of environmental and edaphic factors on the vegetation at protected area of Jahan-nama, within 37 sampling units (100×l00m), random plots of I-m2 were selected. Canopy coverage, production, utilization of range species, and physical and edaphic factors were measured. Based on entire data of 37 sampling units, by the use of stepwise regression, soil moisture was the only variable, which entered to the model of the canopy coverage as a dependent variable. The relation between production and elevation was quadratic, so that by increasing the elevation, production decreased first and then gradually increased. With utilization as a dependent variable, elevation and interaction of siol moisture and elevation were entered to the linear model. Based on categorized data of elevation, quadratic relationship established between production and different classes of elevation. Utilization decreased linearly as the elevation increased. There were also an inverse linear relationship between utilization and classes of slope that can be related to the immobility of herds that prefer steep slopes. Canopy coverage for dominant species of Stachys sp. and Poa bulbosa declined as the elevation increased. At higher elevations, the canopy coverage Juniperus communis was increased that is a cushion plant, occupies vast areas.

Cites

INVESTIGATION ON THE RELATIONSHIP BETWEEN VEGETATION CHARACTERISTICS AND TOPOGRAPHIC FACTORS IN UTILIZATION UNITS OF MOUNTAINOUS RANGELANDS OF VAZ, MAZANDARAN

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APA: Copy

NOUHI, S.N., MESDAGHI, M., & HESHMATI, G.. (2001). AN INVESTIGATION ON THE EFFECT TOPOGRAPHIC FACTORS ON THE CANOPY COVERAGE AND PRODUCTION OF RANGE SPECIES AT JAHAN-NAMA PROTECTED AREA. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 7(4), 27-34. SID. https://sid.ir/paper/9469/en

Vancouver: Copy

NOUHI S.N., MESDAGHI M., HESHMATI G.. AN INVESTIGATION ON THE EFFECT TOPOGRAPHIC FACTORS ON THE CANOPY COVERAGE AND PRODUCTION OF RANGE SPECIES AT JAHAN-NAMA PROTECTED AREA. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2001;7(4):27-34. Available from: https://sid.ir/paper/9469/en

IEEE: Copy

S.N. NOUHI, M. MESDAGHI, and G. HESHMATI, “AN INVESTIGATION ON THE EFFECT TOPOGRAPHIC FACTORS ON THE CANOPY COVERAGE AND PRODUCTION OF RANGE SPECIES AT JAHAN-NAMA PROTECTED AREA,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 7, no. 4, pp. 27–34, 2001, [Online]. Available: https://sid.ir/paper/9469/en

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