Integrating landscape connectivity and habitat suitability to guide offensive and defensive invasive species management
Integrating landscape connectivity and habitat suitability to guide offensive and defensive invasive species management
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整合景观连通性和栖息地适宜性来指导进攻性和防御性入侵物种管理
DOI：
10.1111/1365-2664.12395
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发表时间：
2015
影响因子：
5.7
通讯作者：
Pieter T. J. Johnson
中科院分区：
文献类型：
--
作者：
B. Stewart‐Koster;J. Olden;Pieter T. J. Johnson
总结1。防止入侵物种的到来是控制其影响的最有效方法。预防性策略可能是“进攻性”的，目的是防止入侵者离开被殖民的地点，或者是“防御性”的，目的是防止入侵者到达未被入侵的地点。必须优先考虑控制入侵物种的有限资源，特别是对于许多脆弱地点或不确定哪些地点已经被入侵。2. 我们开发了一个综合建模框架，通过结合连通性和栖息地适宜性来优先考虑两种策略的地点。我们将该框架应用于美国威斯康辛州和密歇根州5189个水体的数据集，其中包括斑马贻贝（Dreissena polymorpha）和欧亚水藻（Myriophyllum spicatum）。我们开发了一个基于休闲划船运动和栖息地适宜性模型的空间图框架。3. 一个历史图由3105个天然湖泊组成，连接在18个组成部分中的一个中，而在一个当代系统图中，共有3944个水体（湖泊和水库）连接在13个独立组成部分中的一个中。生境适宜性模型约占每个物种分布数据偏差的一半。4. 风险水平和随后建议的跨多个投资水平的管理干预分配存在明显的空间格局。风险较高的水体一般分布在空间图的最大组成部分。在相对较低的投资水平下，管理者的目标是控制5%的所有区域，结果表明，在最大的组成部分中，71%和27%的努力应分别用于防御和进攻策略。对于纹状体，在这一成分中，92%和8%的努力应分别分配给防御和进攻策略。只有投入更大的资金，其他组成部分的水体才能成为目标。5. 合成与应用。分配有限的资源来防止入侵物种的传播是一个超越生态系统和地理的挑战。我们成功地确定了两个物种进攻性和防御性干预策略的减少位置。这一框架很容易适用于易受入侵物种侵害的其他水生和陆地生态系统。
Summary 1. Preventing the arrival of invasive species is the most effective way of controlling their impact. Preventative strategies may be ‘offensive’ aimed at preventing the invader leaving colonised locations or ‘defensive’ aimed at preventing its arrival at uninvaded locations. The limited resources for invasive species control must be prioritized, particularly for numerous vulnerable locations or uncertainty about which sites are already invaded. 2. We developed an integrative modelling framework to prioritise locations for either strategy by incorporating connectivity and habitat suitability. We applied this framework to a data set comprising 5189 water bodies in Wisconsin and Michigan, U.S.A, for zebra mussels Dreissena polymorpha and Eurasian watermilfoil Myriophyllum spicatum. We developed the framework with a spatial graph based on recreational boater movement and habitat suitability models. 3. An historical graph comprised 3105 natural lakes connected in one of 18 components, whereas a total of 3944 water bodies (lakes and reservoirs) were connected in one of 13 separate components in a graph of the contemporary system. Habitat suitability models accounted for around half of the deviance in the distribution data for each species. 4. There was a distinct spatial pattern in the levels of risk and subsequent recommended allocation of management interventions across several levels of investment. Higher risk water bodies were generally found in the largest component of the spatial graph. At comparatively low levels of investment, where managers target 5% of all locales to control D. polymorpha, the results suggested that 71% and 27% of this effort should be committed to defensive and offensive strategies, respectively, in the largest component. For M. spicatum, 92% and 8% of this effort should be allocated in this component to defensive and offensive strategies, respectively. It is only with much greater investment that water bodies in other components should be targeted. 5. Synthesis and applications. Allocating limited resources to prevent the spread of invasive species is a challenge that transcends ecosystems and geography. We successfully identified a reduced number of locations to target for offensive and defensive intervention strategies for two species. This framework is readily applicable to other aquatic and terrestrial ecosystems vulnerable to invasive species.