Effects of climate variability on canopy cover percentage of forage species in Ghosheh steppe rangelands, Semnan Province

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AZIZI N.; JONEIDI JAFARI H.; OSATI KH.

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Paper Information

Journal: IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH Year:2019 | Volume:26 | Issue:3 (76) Page(s): 717-730

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Information Journal Paper

Title

Effects of climate variability on canopy cover percentage of forage species in Ghosheh steppe rangelands, Semnan Province

Author(s)

AZIZI N. | JONEIDI JAFARI H. | OSATI KH. | Issue Writer Certificate

Keywords

Canopy coverQ2

climatic variabilityQ1

precipitationQ1

linear regressionQ2

GhoshehQ1

Abstract

This research monitored changes in Canopy cover percentage of typical species during a 10-year period in the Ghosheh rangelands to find out the relationship between two important climate variables (precipitation and temperature) and Canopy cover changes. Therefore, the Canopy cover percentages of six typical species (separately) and annual species (overall) were measured during 10 years at the end of growing season in thirty 2-m2 plots, distributed along two 250– m transect lines. The results demonstrated that the maximum Canopy cover percentage for water year 2006-2007 (wet-year) and the minimum value for water year 2012-2013 (drought) were 15% and 5. 5%, respectively. The Canopy cover percentage modeling was performed based on linear regression method using precipitation and temperature variables. The precipitation of April explained 65% of changes in Canopy cover percentage of A. sieberi at 95% confidence level (RRMSE = 0. 26 & MAE=0. 49). The best simple linear regression model for estimating Canopy cover percentage of S. barbata and Z. eurypterum was introduced by total precipitation of March-June and precipitation of March, representing 77% (at 99% confidence level) and 67% (at 95% confidence level) of changes in Canopy cover, respectively. Considering the dominant role of A. sieberi, S. barbata and Z. eurypterum in vegetation composition of study areas, it can be concluded that most changes in Canopy cover of the studied rangeland are predictable by variability of precipitation during growing seasons.

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APA: Copy

AZIZI, N., JONEIDI JAFARI, H., & OSATI, KH.. (2019). Effects of climate variability on canopy cover percentage of forage species in Ghosheh steppe rangelands, Semnan Province. IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, 26(3 (76) ), 717-730. SID. https://sid.ir/paper/395795/en

Vancouver: Copy

AZIZI N., JONEIDI JAFARI H., OSATI KH.. Effects of climate variability on canopy cover percentage of forage species in Ghosheh steppe rangelands, Semnan Province. IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH[Internet]. 2019;26(3 (76) ):717-730. Available from: https://sid.ir/paper/395795/en

IEEE: Copy

N. AZIZI, H. JONEIDI JAFARI, and KH. OSATI, “Effects of climate variability on canopy cover percentage of forage species in Ghosheh steppe rangelands, Semnan Province,” IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, vol. 26, no. 3 (76) , pp. 717–730, 2019, [Online]. Available: https://sid.ir/paper/395795/en

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