Sensitivity analysis of ecosystem service valuation in a Mediterranean watershed.
Sensitivity analysis of ecosystem service valuation in a Mediterranean watershed.
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DOI：
10.1016/j.scitotenv.2012.07.071
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发表时间：
2012-12
期刊：
影响因子：
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通讯作者：
M. Sánchez-Canales;Alfredo López Benito;A. Passuello;M. Terrado;G. Ziv;V. Acuña;M. Schuhmacher;
中科院分区：
文献类型：
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作者：
M. Sánchez-Canales;Alfredo López Benito;A. Passuello;M. Terrado;G. Ziv;V. Acuña;M. Schuhmacher;
自然生态系统的服务显然对我们的社会非常重要。在过去的几年里，保护和评估生态系统服务的努力得到了推动。例如，自然资本项目将生态系统服务纳入世界各地的日常决策。该项目开发了INVITE(生态系统服务和权衡综合评估系统)。投资模型是一个空间集成的建模工具，使我们能够预测生态系统服务、生物多样性保护和商品生产水平的变化。在这里，投资模式被应用于利益相关者定义的地中海地区盆地(西班牙加泰罗尼亚Llobregat盆地)土地利用/土地覆盖变化的情景。在所有投资模块和子模块中，本文只研究了供水模块的行为。本文的主要创新点是对INSTEST模型进行了敏感性分析，以确定模型响应的三个主要系数Z(季节降水量分布)、PREC(年降水量)和ETO(年蒸散量)的变化情况。这里使用的SA技术是一种称为莫里斯法的一次一次筛选方法，应用于洛洛布雷加特河流域划分的154个子流域中的每一个。因此，该方法为所考虑的每个子流域提供了三个敏感性指数，这些指数被映射以研究它们是如何在空间上分布的。根据他们的分析，研究表明，在所考虑的情况下，以及在所考虑的每个因素的界限之间，Z系数对模型响应的影响可以忽略不计，而另外两个系数需要被准确地确定，以便获得精确的输出变量。这项研究的结果将适用于在固结剂稀缺项目中评估的其他流域。
The services of natural ecosystems are clearly very important to our societies. In the last years, efforts to conserve and value ecosystem services have been fomented. By way of illustration, the Natural Capital Project integrates ecosystem services into everyday decision making around the world. This project has developed InVEST (a system for Integrated Valuation of Ecosystem Services and Tradeoffs). The InVEST model is a spatially integrated modelling tool that allows us to predict changes in ecosystem services, biodiversity conservation and commodity production levels. Here, InVEST model is applied to a stakeholder-defined scenario of land-use/land-cover change in a Mediterranean region basin (the Llobregat basin, Catalonia, Spain). Of all InVEST modules and sub-modules, only the behaviour of the water provisioning one is investigated in this article. The main novel aspect of this work is the sensitivity analysis (SA) carried out to the InVEST model in order to determine the variability of the model response when the values of three of its main coefficients: Z (seasonal precipitation distribution), prec (annual precipitation) and eto (annual evapotranspiration), change. The SA technique used here is a One-At-a-Time (OAT) screening method known as Morris method, applied over each one of the one hundred and fifty four sub-watersheds in which the Llobregat River basin is divided. As a result, this method provides three sensitivity indices for each one of the sub-watersheds under consideration, which are mapped to study how they are spatially distributed. From their analysis, the study shows that, in the case under consideration and between the limits considered for each factor, the effect of the Z coefficient on the model response is negligible, while the other two need to be accurately determined in order to obtain precise output variables. The results of this study will be applicable to the others watersheds assessed in the Consolider Scarce Project.