状态： 外来
入侵： 入侵
出现纪录： ?????
来源： Campbell and Donlan 2005 此地点的管理信息：
469 goats (Capra hircus) were removed between 1959 and 1961. Eradication methods used were hunting, and hunting with dogs. Cuvier covers an area of 181 hectares. 影响：
吃草: Goats have been recognised as “the single most destructive herbivore” introduced to the islands of the world (King 1985). By eating young trees in a forest they prevent the replacement of adult trees that form the forest canopy.
降低本地生物多样性: Atkinson (1960) reported on the devastating effect that browsing goats had inflicted upon the vegetation of Cuvier Island. The forest was originally dominated by the New Zealand pohutukawa Metrosideros excelsa Gaertn. However, the regeneration of this and other tree species has been completely halted, and on the seaward slopes there was little of this original woody vegetation left (Sykes 1969).
A 36-year study of forest recovery since the eradication of goats showed that more than two-thirds of the tree and shrub species present had been reduced by goats, some to very low numbers. At least six other plant species on the island had probably been eliminated by goats (Atkinson, in prep.). In addition, early indications are that at least six plant species became extinct on the island as a result of goats 最后修改 ： 23/05/2006 12:55:11 p.m.
|
