入侵植物长芒苋在中国的潜在分布

Potential distribution of invasive palmer amaranth in China(Amaranthus palmeri)

为了合理分析入侵植物长芒苋(Amaranthuspalmeri)在中国的潜在分布情况,进而阻断其传播扩散,首先对长芒苋在美洲地区、欧洲地区和亚洲地区的气候生态空间进行比较,然后运用生态位模型对其潜在分布进行分析.结果表明:长芒苋在美洲、欧洲和亚洲地区所占有的生态空间存在差别,但在入侵过程中其在各地区间的生态位是保守的.在全球尺度下,气候和人类活动共同影响长芒苋的扩散和蔓延,主要的潜在入侵地区包括南美洲的东南地区、非洲南部地区、欧洲中部地区、印度西北地区以及中东、亚洲东部和澳大利亚东部及西南地区.长芒苋在中国的潜在分布集中在华北平原地区,这些区域为重要的粮食产区,同时受人类活动影响强烈,因此建议监控这些地区的长芒苋分布和扩散.

To reasonably analyze the potential distribution of invasive palmer amaranth （A maranthus palmeri） in China and forwarding information on preventing its further distribution, the climate spaces occupied by the North America, Eu- rope and Asia populations of A. pa/mer/ were compared firstly. Then ecological niche model was adopted to predict its potential distribution. The results showed that the North America, Europe and Asia populations occupied different climate spaces, nonetheless climate niche was conservative during its invasion. Climate suitability combined with human activity contributed to the global invasion of A. pa/mer/. The global potential distribution areas include southeastern South America, southern Africa, central Europe, northwestern India, central and eastern Asia, eastern and southwestern Australia. In Chi- na, the highly suitable areas of A. palmeri mainly distributed in the central northern areas, which covered the main crops cultivation areas of China and were heavily affected by human activity. Therefore, the distribution and spread risk of A. palmeri in these areas should be monitored carefully.