van Leeuwen Jacqueline F N, Froyd Cynthia A, van der Knaap W O, Coffey Emily E, Tye Alan, Willis Katherine J
Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, CH-3013 Bern, Switzerland.
Science. 2008 Nov 21;322(5905):1206. doi: 10.1126/science.1163454.
Paleoecological evidence from the past 8000 years in the Galápagos Islands shows that six presumed introduced or doubtfully native species (Ageratum conyzoides, Borreria laevis/Diodia radula-type, Brickellia diffusa, Cuphea carthagenensis, Hibiscus diversifolius, and Ranunculus flagelliformis) are in fact native to the archipelago. Fossil pollen and macrofossils from four sites in the highlands of Santa Cruz Island reveal that all were present thousands of years before the advent of human impact, refuting their classification as introduced species. These findings have substantial implications not only for conservation in Galápagos but for the management of introduced species and pantropical weeds in general.
来自加拉帕戈斯群岛过去8000年的古生态证据表明，六种被认为是外来引入或疑似本土的物种（藿香蓟、光叶丰花草/小光叶丰花草类型、白花鬼针草、卡塔赫纳萼距花、异叶木槿和丝状毛茛）实际上是该群岛的本土物种。来自圣克鲁斯岛高地四个地点的化石花粉和大化石显示，在人类影响出现之前的数千年前，所有这些物种就已存在，这驳斥了将它们归类为外来引入物种的观点。这些发现不仅对加拉帕戈斯群岛的保护具有重大意义，而且对一般外来引入物种和泛热带杂草的管理也具有重大意义。
