Study of Relationships between Plant Morphology and Nebkha Morphometry Characteristic of Reaumaria Turcestanica in Khairabad Desert in Sirjan



Modeling is important in understanding complex ecogeomorphological relationships for useful applications, include: predicting the likely success of remobilizing dormant dune systems, managing and mitigating desertification and degradation of semi-arid land, assessing the impact of climate change, investigating the effects of changes in land use and reconstructing conditions responsible for the formation and stabilization of relict systems. Nebkha dunes have been proposed as a reliable rapid indicator of Aeolian erosion and vegetation. The aim of this paper is understanding the relationships between nebkha morphometry parameters together and with morphological characteristic of Reaumeria turcestanica. For obtaining objective of study we measure canopy cover and height of plant and elevation, diameter and slop for nebkha from 10 transects and 157 samples in khairabad area in Sirjan. The technical method used for investigation of relations was simple and multivariate regression analysis. Regression analysis showed a significant relationship ( <0.01) between plant height and nebkha elevation with coefficient of determination (R2) of 0.58 for linear relationship and 0.60 for both quadratic estimation. Also a significant relationship ( <0.01) exists between canopy cover and nebkha elevation with coefficient of determination of 0.54 for linear function and 0.58 for both quadratic estimations. Analysis Regression significant relationship ( <0.01) between nebkha height and nebkha diameter with R2 of 0.49 for linear and quadratic estimation and 0.50 for cubic function.