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英文文献：Economics of controlling invasive species: optimal control and stability of ecological-economic system-入侵物种控制经济学:生态经济系统的最优控制与稳定性
英文文献作者：Chalak, Morteza,Ruijs, Arjan,Hemerik, Lia,van der Werf, Wopke,van Ierland, Ekko C.
英文文献摘要：
Natural enemies such as herbivores that are introduced to reduce invasive plants can spill over into nature, threaten indigenous species and impose significant costs. We develop a bioeconomic model to analyse the optimal control management strategy of an introduced herbivore that has spilled over from a managed system to a natural area. Cost-effective control strategies are analysed that reduce the spillover effects of herbivores on endangered plants species to reduce the risk of extinction and increase benefits obtained from the ecosystem. We consider two competing indigenous plant species as the representatives of the plant community. Only one of these species is consumed by introduced herbivore. We show that the optimal level of controlling herbivores is relatively high in the following circumstances: (a) the herbivore has a high attack rate on the non-target host, (b) the herbivore has a relatively low attack rate on the target species (i.e. the weed), (c) the costs of controlling herbivore are low, (d) the non-target species has a low density (e) the non-target host has a higher biodiversity value than does its competitor. Point (b) is particularly interesting in the view of previous literature that reaches opposite conclusions.
为了减少入侵植物而引入的天敌，如食草动物，可能会溢出到大自然中，威胁本土物种并造成巨大损失。我们开发了一个生物经济模型来分析引进的草食动物从一个管理系统溢出到一个自然区域的最优控制管理策略。分析了具有成本效益的控制策略，以减少食草动物对濒危植物物种的溢出效应，以减少灭绝的风险，并增加从生态系统获得的利益。我们认为两种相互竞争的本地植物物种是植物群落的代表。这些物种中只有一种被引进的食草动物吃掉。我们表明,最优控制食草动物是相对较高的水平在下列情形之一:(a)的食草动物高攻击率在非目标主机上,(b)的食草动物的攻击率相对较低的目标物种(如杂草),(c)控制食草动物的成本很低,(d)非目标物种有一个低密度(e)非目标主机具有更高的生物多样性价值比其竞争对手。(b)点特别有趣，因为以前的文献得出了相反的结论。
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