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Spatial distribution pattern of Populus euphratica populations in the lower reaches of Tarim river



Spatial distribution pattern of Populus euphratica populations in the lower reaches of Tarim river



Xibei Zhiwu Xuebao 26(10): 2125-2130



The species, heights, diameter breast heights, canopy widths and plant numbers in 38 quadrats of 6 belt transects,which were located in Yingsu Cross-section and Kaerdayi cross-section lying in the lower reaches of Tarim river where Populus euphratica concentrated, were investigated to study the distribution patterns,aggregation intensities and distribution pattern scales of P. euphratica populations at different distances away from the river. It was shown that in most cases P. euphraticu appeared to have an aggregative distribution at different distances away from the river but it tended to be diffusive,appearing to have an random distribution; In the two cross-sections, P. euphratica tended to increase its distribution pattern scale and aggregation intensity as the distances increased and the distribution pattern scale of P. euphraticu in Kaerdayi cross-section was lower than that in Yingsu cross-section at the same distances away from the river, which was because the cross-sections had different underground water conditions and topographical conditions. However,at several distances away from the river,P. euphruticu did not followed the pattern in distribution pattern scale that the distribution scale increased as the distances away from the river increased,which was a responsive expression of P. euphrutica populations to heterogeneous environments.

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