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2000—2009年,采用野外样带调查与多点定位监测结合的方法,研究了区域气候变化对达乌里胡枝子种群分布和生长的影响.结果表明:受气温的影响,达乌里胡枝子种群的适宜生长范围由西北向东南呈明显的地带性分布,种群分布的适宜温度在7.4℃～10℃,平均密度为13.9株.m-2,生殖枝数量平均为每丛11.4枝,生长稳定;受降水梯度的影响,达乌里胡枝子种群的水平分布已由典型草原地带的建群种或优势种扩展为森林草原地带的伴生种,并从伴生种上升为优势种.在荒漠草原地带的沟谷半阳坡及沙丘附近也常以偶见种出现,并从年降雨300～500mm的适宜区,已逐渐扩大到降雨量较低的270mm和较高的600mm区域;达乌里胡枝子种群分布的海拔高度由1100～1700m扩展到600～1950m的范围.在全球气候变暖背景下,达乌里胡枝子种群生态幅在逐渐扩大.
The effects of regional climate change on the distribution and growth of the population of Lespedeza davurica were studied using a combination of field transects and multi-point location monitoring from 2000 to 2009. The results showed that: The suitable range of population growth was from northwest to southeast. The suitable temperature of population distribution was 7.4 ℃ ~ 10 ℃, the average density was 13.9 m-2, the average number of reproductive branches was 11.4 per bundle, and the growth was stable ; The horizontal distribution of Lespedeza davurica population has been extended from the dominant species or species-forming species in the typical grassland zone to the associated species in the forest steppe zone by the gradient of precipitation, and increased from the accompanying species to the dominant species.In the desert steppe zone The semi-sunny slopes of the valleys and the sand dunes are often seen as occasional species, and have gradually expanded to 270 mm and higher 600 mm areas with low rainfall from 300 to 500 mm in annual rainfall. The distribution of altitude above sea level ranged from 1100 to 1700 m to 600 to 1950 m. Under the background of global warming, the population of Lespedeza dahurica population was gradually expanding.