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Implications of agricultural policy for species invasion in shifting cultivation systems

机译:农业政策对轮作制度中物种入侵的影响

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Policies to influence land use decisions in agriculture or grazing can increase the ability of invasive species to out-compete native species and thereby disrupt seemingly stable ecological-economic systems. Building off of models of interdependent resources, invasive species and soil fertility, this paper develops a model of shifting cultivation decisions for two types of farmers, one who sees the threat of invasive grasses and one who does not. The paper uses numerical solutions to this dynamic decision problem to examine the impact of various policies on farmer welfare and on the stability of the economic-ecological system. Some policies undermine the resilience of the system, while other policies augment the system's ability to withstand species invasions.
机译:影响农业或放牧中土地使用决策的政策可以提高入侵物种超越本地物种的竞争能力,从而破坏看似稳定的生态经济系统。建立在相互依赖的资源,入侵物种和土壤肥力模型的基础上,本文针对两种类型的农民开发了一种改变种植决策的模型,一种农民看到入侵草的威胁,而另一种则没有。本文使用数值解决方案来解决这一动态决策问题,以检验各种政策对农民福利和经济生态系统稳定性的影响。一些策略破坏了系统的弹性,而其他策略则增强了系统抵御物种入侵的能力。

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