Decomposing the stochastic growth rate with nonlinear effects: data and R code

Data and R code from publication: Le Coeur, C., Yoccoz, N.G., Salguero-Gomez, R., Vindenes, Y. (accepted). Life history adaptations to fluctuating environments: Combined effects of demographic buffering and labillity, Ecology Letters <br> <strong>Files:</strong> - <strong>DecompositionStochGrowthRate.R: </strong> an R file with code to decompose the stochastic population growth into main components capturing effects of nonlinearity in demographic parameters as a function of an environmental driver z, and effects of variance-covariance among the parameters. Both the analytical and simulation approaches are presented. <br> - <strong>ComadreMPM154.RData:</strong> Selection of age- and stage-structured matrix population models (MPMs) from the COMADRE animal database (v.4.20.5; Salguero-Gomez et al. 2016; https://compadre-db.org/Data/Releases). These MPMs are used as a starting point to our theoretical exploration across generation time, considering different scenarios for effects of the environment z on the demographic parameters. <br>

本数据集包含已录用学术论文的配套数据与R代码，论文作者为Le Coeur, C.、Yoccoz, N.G.、Salguero-Gomez, R.、Vindenes, Y.，论文标题为《波动环境下的生命史适应：种群统计缓冲与易变性的联合效应》，发表于《生态学快报（Ecology Letters）》。

**数据集文件：**
- **DecompositionStochGrowthRate.R**：该R脚本可将随机种群增长分解为两类核心效应组分：一是种群统计参数随环境驱动因子z变化的非线性效应，二是参数间的方差-协方差效应。脚本同时提供解析法与模拟法两种实现方案。
- **ComadreMPM154.RData**：从COMADRE动物数据库（版本v.4.20.5; Salguero-Gomez et al. 2016; https://compadre-db.org/Data/Releases）中遴选的年龄与阶段结构化矩阵种群模型（Matrix Population Models, MPMs）数据集。本研究以这些MPMs作为理论探索的起点，围绕世代时间展开分析，并设置了环境因子z对种群统计参数影响的多种模拟场景。