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物种敏感分布再探:一种贝叶斯非参数方法

Species Sensitivity Distribution revisited: a Bayesian nonparametric approach

Bocconi Institute for Data Science & Analytics, Bocconi University(博科尼数据科学与分析学院,博科尼大学);Univ. Grenoble Alpes, CNRS, Inria, Grenoble INP, LJK(格勒诺布尔阿尔卑斯大学,法国国家科学研究中心,法国国家信息与自动化研究所,格勒诺布尔理工学院);Université Paris-Saclay, INRAE, MaIAGE(巴黎萨克雷大学,法国国家农业食品与环境研究院)

Louise Alamichel, Julyan Arbel, Guillaume Kon Kam King, Igor Prünster

AI总结:

本文提出了一种基于贝叶斯非参数方法的物种敏感分布改进方法,以提高生态风险评估的准确性与鲁棒性。

摘要:

我们提出了一种新的生态风险评估方法,通过将物种敏感分布(SSD)方法重新置于贝叶斯非参数(BNP)框架内。广泛被全球环境监管机构要求使用,SSD因在建模物种变异时依赖于参数假设而受到批评。通过采用非参数混合模型,我们解决了这一限制,建立了SSD的统计稳健基础。我们的BNP方法具有几个优势,包括处理小数据集或受挫数据的有效性,这在生态风险评估中很常见,以及能够提供基于原则的不确定性量化,同时进行密度估计和聚类。我们使用特定的非参数先验作为混合度量,选择其稳健聚类特性,这在缺乏关于组件数量的强先验信念时至关重要。通过模拟研究和对实际数据集的分析,我们展示了BNP-SSD优于传统SSD方法的优越性。我们还提供了一个BNP-SSD Shiny应用,使我们的方法对毒理学社区可用。此外,我们利用混合模型固有的聚类结构来探索物种敏感性模式。我们的发现强调了所提出方法在改进生态风险评估方法方面的有效性。

英文摘要:

We present a novel approach to ecological risk assessment by recasting the Species Sensitivity Distribution (SSD) method within a Bayesian nonparametric (BNP) framework. Widely mandated by environmental regulatory bodies globally, SSD has faced criticism due to its historical reliance on parametric assumptions when modeling species variability. By adopting nonparametric mixture models, we address this limitation, establishing a statistically robust foundation for SSD. Our BNP approach offers several advantages, including its efficacy in handling small datasets or censored data, which are common in ecological risk assessment, and its ability to provide principled uncertainty quantification alongside simultaneous density estimation and clustering. We utilize a specific nonparametric prior as the mixing measure, chosen for its robust clustering properties, a crucial consideration given the lack of strong prior beliefs about the number of components. Through simulation studies and analysis of real datasets, we demonstrate the superiority of our BNP-SSD over classical SSD methods. We also provide a BNP-SSD Shiny application, making our methodology available to the Ecotoxicology community. Moreover, we exploit the inherent clustering structure of the mixture model to explore patterns in species sensitivity. Our findings underscore the effectiveness of the proposed approach in improving ecological risk assessment methodologies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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