三江平原胡枝子潜在分布预测及适宜性分析

Potential Distribution Prediction and Suitability Analysis of Lespedeza bicolor in Sanjiang Plain

近年来,由于三江平原被过度开垦,水土流失严重。胡枝子(Lespedeza bicolor)为优质的水土保持灌木植物,具有多种开发利用价值。为了解胡枝子三江平原潜在适生区,该研究运用MaxEnt模型和ArcGis软件对胡枝子在三江平原的适生区进行预测,探究影响其分布的主要环境变量。结果表明,三江平原的南部(鸡东县、密山县、七台河市、勃利县)以及部分中部地区(集贤县、友谊县)是胡枝子的适生区域(P>0.5),面积为2.16×10^(4)km^(2),占三江平原面积的20%。适生区环境因子统计分析结果为:tmax1(1月最高气温)、prec11(11月平均降水量)、bio14(最干月降水量)、tmin1(1月最低气温)。

In recent years,the Sanjiang Plain has been over cultivated,resulting in serious soil erosion.Lespedeza bi-color is a high-quality shrub for soil and water conservation,and has a variety of development and utilization values.In order to analyze the potential suitable area of Sanjiang Plain,MaxEnt model and ArcGIS software were used to pre-dict the suitable area of Lespedeza in Sanjiang Plain and explore the main environmental variables affecting its distri-bution.The results showed that the southern part of Sanjiang Plain(Jidong County,Mishan County,Qitaihe City,Boli County)and some central areas(Jixian County,Youyi County)were suitable areas for Lespedeza(P>0.5),with an ar-ea of 2.16×10^(4)km^(2),accounting for 20%of the area of Sanjiang Plain.The results showed that tmax1(maximum tem-perature in January),prec11(average precipitation in November),bio14(precipitation in the driest month)and tmin1(minimum temperature in January)were the suitable environmental factors.