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In order to understand the morphological interactions between Tamarix ramosissima nebkhas and Tamarix ramosissima thickets in the oasis-desert ecotones, 100 independent Tamarix ramosissima nebkhas were randomly selected under different sand supply conditions in the northwest oasis-desert ecotone of Cele at the southern rim of the Taklimakan Desert. According to the difference in vegetation coverage and land surface characteristics, we divided the 100 nebkhas into four categories under four sand supply conditions (i. e. fixed sandy land, semi鄄fixed sandy land, semi鄄shifting sandy land

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