胡杨地理分布特征与气候环境的相关性分析

目的]研究胡杨地理分布区域气候环境特征和变化规律以及胡杨自身对环境气候的适应性。方法]在综述胡杨树种概况和地理分布的基础上,对胡杨分布区气候、水资源、地下水特征、土壤类型以及人类活动影响等进行了综合分析。结果]特殊的区域气候环境条件以及长期的人类活动干扰是影响胡杨生长的主要因素。胡杨叶形的变化是对气候环境适应的明显特征,胡杨通过调节酚类次生代谢物质在体内的合成、转运和转化等过程来抵御极端干旱环境下各种环境因子的胁迫。有效的保护和更新复壮措施以及生态输水工程对于恢复和重建受损的胡杨林绿洲生态环境作用显著。结论]该研究对于中国西北内陆干旱地区生态环境恢复建设具有重要意义。

Analysis of the Correlation between the Geographical Distribution of Populus euphratica Oliv. and the Climatic Environment

Objective] This research was to study the correlation between regional climatic characteristics and changing geographic distribution of Populus euphratica Oliv.(Salicaceae),as well as the adaption of Populus euphratica Oliv.to the climatic environment.Method] The climatic characteristics,water source,groundwater and soil type in the distribution regions of Populus euphratica Oliv.and the effect of long-term human activities were comprehensively analyzed based an overview of Populus euphratica Oliv.and its distribution.Result] Specific regional climatic characteristics and long term human activities are the principle determinants for the growth of Populus euphratica Oliv.The change of leaf shape is a distinct feature of Populus euphratica Oliv.in adapting to the climatic environment.Populus euphratica Oliv.withstands various environmental stresses by means of in vivo synthesis,transport and conversion of secondary phenolic metabolites.Effective protection and rehabilitation measures,and ecological water transport have obvious effect on the restoration and reconstruction of damaged ecological environment of Populus euphratica oasis.Conclusion] This study is of great significance for the restoration of ecological environment in the arid inland regions in Northwest China.