外来植物入侵一直是美国及其它国家感到头痛的问题。外来的草本植物不仅把本地植物赶出生态圈,增加火灾隐患,且使当地原先优质的牧草质量下降。近日召开的美国生态学会上公布的一项最新研究成果表明,只要增播本地草种,就有可能恢复美国西部原有的草场。为遏制外来草的发展,美国国家生态综合分析中心的埃里克·塞伯姆与同 Alien plant invasions have been a headache for the United States and other countries. Exotic herbs not only drive native plants out of the ecosystem, increase fire hazards, and degrade the quality of pasture, which was originally native to the region. A recent study released by the American Ecology Society recently showed that it is possible to restore the original grasslands in the western United States by simply planting local grasses. In order to curb the development of exotic grass, Eric Seibom of the National Center for Ecological Comprehensive Analysis of the United States