There is a pressing need to resolve methods that can determine native versus non-native plant use in drylands, arid areas and indeed in more temperate areas around the world. This is because whilst plant introductions may have positive objectives they can have negative landscape and ecological impacts. A key discussion on this issue focuses on whether the use of non-native plant species can be considered to be pollution and pollutive, based on the concept that pollution can be regarded as ‘matter out of place’. There are many examples of nature based , e.g. radon or toxic waters but what this paper focuses on is the issue of human induced pollution in the form of planting. This paper aims to determine a number of methods based on sustainability principles and on those used in landscape and environmental impact assessment to determine when and where non-native plants could be used and where native plants should be used. These sometimes simple and sometimes more complex methods are determined by understanding the genius loci / sense of place, and the ‘nature’ of landscape. They are determined through the identity of landscape character, landscape quality, landscape value and sensitivity to change. A complex model using a matrix tool, determines plant use types by combining sensitivity to change of the landscape relative to the magnitude of change that would be caused through the use of non-native plant species.

中文翻译：

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异国情调等于污染吗？解决旱地使用本地与非本地植物物种困境的景观方法

迫切需要解决可以确定旱地、干旱地区甚至世界上更温带地区的本地与非本地植物使用情况的方法。这是因为虽然植物引进可能具有积极的目标，但它们可能会对景观和生态产生负面影响。基于污染可被视为“不合时宜的物质”的概念，对这一问题的主要讨论集中在使用非本地植物物种是否可被视为污染和污染。有许多基于自然的例子，例如氡或有毒水，但本文关注的是人为引起的种植形式的污染问题。本文旨在确定一些基于可持续性原则以及景观和环境影响评估中使用的方法，以确定何时何地可以使用非本地植物以及应在何处使用本地植物。这些有时简单有时更复杂的方法是通过理解天才地点/地点感和景观的“性质”来确定的。它们是通过景观特征、景观质量、景观价值和对变化的敏感性来确定的。一个使用矩阵工具的复杂模型通过将景观变化的敏感性与非本地植物物种的使用引起的变化幅度相结合来确定植物使用类型。这些有时简单有时更复杂的方法是通过理解天才地点/地点感和景观的“性质”来确定的。它们是通过景观特征、景观质量、景观价值和对变化的敏感性来确定的。一个使用矩阵工具的复杂模型通过将景观变化的敏感性与非本地植物物种的使用引起的变化幅度相结合来确定植物使用类型。这些有时简单有时更复杂的方法是通过理解天才地点/地点感和景观的“性质”来确定的。它们是通过景观特征、景观质量、景观价值和对变化的敏感性来确定的。一个使用矩阵工具的复杂模型，通过将景观变化的敏感性与通过使用非本地植物物种引起的变化幅度相结合来确定植物使用类型。