The introduced Argentine ant (Linepithema humile) on the California Channel Islands: distribution and patterns of spread.
The introduced Argentine ant (Linepithema humile) on the California Channel Islands: distribution and patterns of spread.
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DOI：
10.3398/064.078.0421
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发表时间：
2018-01-01
影响因子：
0.6
通讯作者：
Holway, D. A.
中科院分区：
文献类型：
--
作者：
Boser, C. L.;Merrill, K.;Holway, D. A.
阿根廷蚂蚁（Linepithema humile）是一种广泛而丰富的引进物种，破坏了整个引进范围的生态系统。在过去的世纪，这种入侵者被不经意地引入到圣卡塔利纳、圣克莱门特、圣克鲁斯和圣尼古拉斯群岛，但目前似乎没有从剩余的海峡群岛。多个空间分离的侵扰，每个入侵的岛屿上单独的范围从427公顷的大小，包括各种各样的栖息地，包括大面积完全由本地多年生植被为主。在个别岛屿上存在多种虫害表明，无意中引入人类作为一个重要的岛屿内的传播机制。对圣克莱门特岛和圣克鲁斯岛的个体虫害进行多年调查，发现每个虫害的边缘呈放射状扩张（由于菌落出芽）。圣克莱门特岛萌芽的传播速度从10 m/年到57 m/年不等，与加州大陆的传播速度相当。鉴于阿根廷蚂蚁入侵对圣克鲁斯岛的影响，阿根廷蚂蚁在海峡群岛的持续蔓延是一个严重的环境问题。在圣克莱门特和圣克鲁斯群岛正在进行的根除计划将有望在全岛范围内消灭这种有害的入侵者。
The Argentine ant (Linepithema humile) is a widespread and abundant introduced species that disrupts ecosystems throughout its introduced range. This invader was inadvertently introduced to Santa Catalina, San Clemente, Santa Cruz, and San Nicolas Islands at various points during the past century but currently appears to be absent from the remaining Channel Islands. Multiple spatially disjunct infestations on each invaded island individually range in size from 427 ha and encompass a variety of habitats, including large areas that are entirely dominated by native perennial vegetation. The existence of multiple infestations on individual islands suggests that inadvertent introduction by humans serves as an important within-island dispersal mechanism. Multiyear surveys of individual infestations on San Clemente Island and Santa Cruz Island reveal approximately radial patterns of expansion (as a result of colony budding) away from the edge of each infestation. Rates of spread by budding on San Clemente Island range from 10 m/year to 57 m/year and are comparable to those on mainland California. Given the documented effects of Argentine ant invasions on Santa Cruz Island, the continued spread of the Argentine ant on the Channel Islands represents a serious environmental concern. Eradication programs underway on San Clemente and Santa Cruz Islands will hopefully result in island-wide elimination of this detrimental invader.