Data and code from: Ecosystem functional response across precipitation extremes in a sagebrush steppe

usses_water: Experimental Test of Climate Change Impacts on Grassland ANPP
Research project data and code for an analysis of drought and irrigation experiment at US Sheep Experiment State (USSES) near Dubois, ID.Goal is to quantify the impact of a 50% increase/decrease of precipitation on:
* ANPP through time* Relationship of ANPP to soil moisture* Species composition
Running the code

To fully run this code you will need R and a number of R packages.Running `00_source_usses_water_scripts` in the `code/` directory will run all necessary scripts to complete the analysis.The code will also stop and send errors letting you know what R packages need to be installed.Once all packages are installed, the code should run all the way through.
You must source the script from RStudio, rather than from command line, because we use some Rstudio-specific commands to set working directories.
Citation information
This work has been accepted for publication in PeerJ (https://peerj.com/).It is currently in press, so for now please cite as
Tredennick, A.T., A.R. Kleinhesselink, J.B. Taylor, and P.B. Adler. (In press). Ecosystem functional response across precipitation extremes in a sagebrush steppe. PeerJ.
The preprint can be found at: https://www.biorxiv.org/content/early/2018/01/24/195594.
Additionally, please cite the Figshare fileset if reusing data or code as:
Tredennick, A.T., A.R. Kleinhesselink, J.B. Taylor, and P.B. Adler. Data and code from: Ecosystem functional response across precipitation extremes in a sagebrush steppe. Figshare. 10.6084/m9.figshare.5909998

usses_water：气候变化对草地地上净初级生产力（Aboveground Net Primary Productivity，ANPP）影响的野外试验

本数据集包含美国爱达荷州杜波依斯附近的美国绵羊试验站（USSES）干旱与灌溉试验分析相关的研究项目数据与代码。本研究旨在量化降水增减50%对以下内容的影响：
* 随时间变化的地上净初级生产力
* 地上净初级生产力与土壤湿度的关联关系
* 物种组成

代码运行说明
若需完整运行本代码，需安装R语言及若干R扩展包。在`code/`目录下执行`00_source_usses_water_scripts`脚本，即可运行所有必要脚本以完成完整分析。若存在缺失的R扩展包，代码将暂停并报错提示所需安装的依赖包。完成所有依赖包安装后，代码可顺利完整运行。
请注意，需在RStudio中运行该脚本，而非通过命令行执行，因为本代码使用了部分RStudio专属命令以设置工作目录。

引用信息
本研究成果已被《PeerJ》期刊收录（https://peerj.com/），目前处于付印阶段。现阶段引用格式如下：
Tredennick, A.T., A.R. Kleinhesselink, J.B. Taylor 与 P.B. Adler. (In press). 灌丛草原极端降水梯度下的生态系统功能响应. 《PeerJ》.
预印本可通过以下链接获取：https://www.biorxiv.org/content/early/2018/01/24/195594.
若重复使用本数据或代码，请同时引用Figshare数据集：
Tredennick, A.T., A.R. Kleinhesselink, J.B. Taylor 与 P.B. Adler. 数据与代码来源：灌丛草原极端降水梯度下的生态系统功能响应. Figshare. 10.6084/m9.figshare.5909998