Predicting the influence of river network configuration, biological traits and habitat quality interactions on riverine fish invasions
Predicting the influence of river network configuration, biological traits and habitat quality interactions on riverine fish invasions
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DOI：
10.1111/ddi.13459
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发表时间：
2021-12-09
影响因子：
4.6
通讯作者：
Britton, J. Robert
中科院分区：
文献类型：
--
作者：
Dominguez Almela, Victoria;Palmer, Stephen C. F.;Britton, J. Robert
目的 物种与其景观之间的关系对于理解迁徙模式非常重要。在河流系统中，河网的复杂性会强烈影响入侵外来鱼类的扩散和定植率，但栖息地质量、物种的生物特征及其引入地点也可能很重要。然而，对这些因素如何在野外相互作用以影响入侵物种随时间的空间分布的理解仅限于实证研究。地点 来自英格兰和威尔士的“虚拟”和“现实世界”河流。方法 我们开发了一个基于个体的模型 (IBM) 来预测这些不同因素如何影响九种“虚拟”外来鱼类在两个时间范围（10 年和 30 年）内的入侵动态和种群增长率（作为丰度）。外来鱼类的人口统计（r-到K-选择）和扩散（快到慢）特征以及河流的网络复杂性不同。结果 无论河流类型、物种和时间范围如何，扩散和种群增长的主要驱动因素是引入地点和物种释放区域的平均栖息地质量。引入地点决定了扩散主要是被动向下游方向（较快）还是主动向上游方向（较慢），栖息地质量较高，从而实现更快的种群增长率。 30多年来，随着河网复杂性的增加，入侵率预计会增加，因为这打开了多个入侵前沿，入侵者的特征有利于更快的扩散。主要结论 这部小说揭示了物理环境的复杂性如何与外来物种的生物特征相互作用以影响入侵结果，其中引入的位置及其栖息地质量是最重要的因素。因此，这些结果大大增加了对影响外来淡水鱼类扩散和定植率的因素的了解。
Aim The relationships between species and their landscape are important for understanding migration patterns. In fluvial systems, the complexity of the river network can strongly influence the dispersal and colonization rates of invading alien fishes, but habitat quality, species' biological traits and their location of introduction are also potentially important. However, understandings of how these factors interact in the wild to influence the spatial distribution of invasive species over time are limited from empirical studies. Location "Virtual" and "real-world" rivers from England and Wales. Method We developed an individual-based model (IBM) to predict how these different factors influenced the invasion dynamics and population growth rates (as abundances) of nine "virtual" alien fishes over two timeframes (10 and 30 years). The alien fishes differed in their demographic (r- to K-selected) and dispersal (fast to slow) characteristics and the rivers in their network complexity. Results Irrespective of river type, species and timeframe, the main drivers of both dispersal and population growth were the location of the introduction and the mean habitat quality of the patch into which the species were released. The introduction location determined whether dispersal was mainly passive in a downstream direction (faster) or active in an upstream direction (slower), with higher habitat quality then enabling faster population growth rates. Over 30 years, invasion rates were predicted to increase as the complexity of the river network increased, as this opened multiple invasion fronts where the invader traits favoured faster dispersal. Main conclusions This novel IBM revealed how the complexity of the physical environment interacts with the biological traits of alien species to influence invasion outcomes, with the location of the introduction and its habitat quality being the most important factors. These results thus substantially increase understanding of the factors that influence the dispersal and colonization rates of alien freshwater fishes.