Range expansion of an invasive species through a heterogeneous landscape - the case of American mink in Scotland
Range expansion of an invasive species through a heterogeneous landscape - the case of American mink in Scotland
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DOI：
10.1111/ddi.12303
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发表时间：
2015-08-01
影响因子：
4.6
通讯作者：
Macdonald, David W.
中科院分区：
文献类型：
--
作者：
Fraser, Elaine J.;Lambin, Xavier;Macdonald, David W.
目的入侵物种的影响是全球生物多样性丧失的主要原因之一，因此，人们对了解物种在其原生范围之外的扩张模式和速度非常感兴趣。我们的目的是描述美洲水貂（Neovison vison）从多个引入点通过以海岸线为界的不同景观入侵的范围扩张，以更好地了解和管理其传播。地点苏格兰，英国。方法我们整理并使用水貂存在的记录来计算连续时间间隔的历史范围和范围扩张率。我们使用仅存在模型来预测栖息地适宜性，并使用新开发的基于个体的建模平台 RangeShifter 来模拟范围扩张。结果记录显示，水貂分布在整个苏格兰，除了最北部。我们发现传播速度在空间和时间上都有变化，并且与景观异质性有关。苏格兰西部适合水貂的栖息地仅限于海岸。主要结论我们得出的结论是，范围扩张的时间和空间变化可归因于景观内的异质性，并且还证明，当合适的栖息地出现在狭窄的地带和/或分散时，长距离扩散的潜力并不一定会促进范围的扩张。我们强调了计算入侵物种扩张率方面的方法差距，但也展示了成功利用仅存在数据的替代方法。我们的研究重申，入侵物种将在不太有利的栖息地定居，并强调即使分布在一段时间内似乎保持不变，也需要对其扩张潜力保持警惕。
AimThe impact of invasive species is one of the main causes of biodiversity loss world-wide, and as a result, there is much interest in understanding the pattern and rate of expansion of species outside their native range. We aimed to characterize the range expansion of the American mink (Neovison vison) invading from multiple introduction points through a varied landscape bounded by coastline to better understand and manage its spread.LocationScotland, UK.MethodWe collated and used records of mink presence to calculate the historical range and rate of range expansion at successive time intervals. We used a presence-only model to predict habitat suitability and a newly developed individual-based modelling platform, RangeShifter, to simulate range expansion.ResultsRecords showed that mink were distributed throughout Scotland, except in the far north. We found that the rate of spread varied both spatially and temporally and was related to landscape heterogeneity. Habitat suitable for mink in west Scotland is restricted to the coast.Main conclusionsWe concluded that temporal and spatial variation in range expansion is attributable to heterogeneity within the landscape and also demonstrated that the potential for long-distance dispersal does not necessarily facilitate range expansion when availability of suitable habitat occurs in narrow strips and/or is fragmented. We have highlighted methodological gaps in calculating rates of expansion in invasive species but have demonstrated alternative methods that successfully utilize presence-only data. Our study reaffirms that invasive species will colonize less favourable habitats and highlights the need to remain vigilant of their potential for expansion even when distribution appears to be static for a time.