Data from: Elevational cline in herbivore abundance driven by a monotonic increase in trophic level sensitivity to aridity

Climate DataLocation and climatic variables of each study site. Temperature and precipitation variables were estimated for 2012-2015 using the PRISM Climate Group Model, and day of year of first snowmelt was estimated using a regional regression (Petry et al. 2016).ClimData.csvClimate Data R CodeThis is the R script for analyses of the relationship between elevation and multiple climatic variables as well as the principal component analysis of these climatic variables. This R script uses the ClimData.csv data file.Aspen Canopy Surveys DataThe abundance of ants and aphids in aspen canopy surveys conducted in 2012.AspenCanopySurveys.csvAspen Canopy Surveys R CodeThis is the R script for analyses of aphid and ant abundance in aspen canopy surveys conducted in 2012. This script uses the AspenCanopySurveys.csv data file.Trophic Level Manipulations DataData describing interspecific interactions involving host plants, aphids, natural enemies, and ants in two, three, and four trophic levels treatments imposed in 2015.TrophicLevelManipulations.csvTrophic Level Manipulations R CodeThis is the R script for analyses of whether aridity mediated aphid performance directly and indirectly by altering aphid multi-trophic species interactions. This script uses the TrophicLevelManipulations.csv data file.Ant Abundance and Resource Use DataThe abundance of ants collected in pitfall traps in 2012 and 2015 as well as ant bait consumption in 2015.AntAbundanceResourceUse.csvAnt Taxonomic Composition in 2012 DataAnt taxonomic composition in pitfall traps in 2012.2012MultivariateData.csvAnt Taxonomic Composition in 2015 DataAnt taxonomic composition in pitfall traps in 2015.2015MultivariateData.csvAnt Abundance and Resource Use R CodeThis is the R script for analyses of ant abundance and taxonomic composition in pitfall traps as well as bait consumption. This script uses the AntAbundanceResourceUse.csv, 2012MultivariateData.csv, and 2015MultivariateData.csv data files.READMEThis file contains descriptions of all data files and R scripts.气候数据集 各研究样地的地理位置与气候变量。2012至2015年的气温与降水变量通过PRISM气候组模型（PRISM Climate Group Model）估算得到，初雪消融日则通过区域回归模型估算（Petry等，2016）。 ClimData.csv 气候数据分析R代码 本R脚本用于分析海拔与多项气候变量之间的关联，以及这些气候变量的主成分分析，该脚本依赖ClimData.csv数据文件。 山杨冠层调查数据集 2012年山杨冠层调查中记录的蚂蚁与蚜虫种群数量。 AspenCanopySurveys.csv 山杨冠层调查分析R代码 本R脚本用于分析2012年山杨冠层调查中的蚜虫与蚂蚁种群数量，该脚本依赖AspenCanopySurveys.csv数据文件。 营养级操控数据集 记录2015年设置的2、3、4营养级处理下，寄主植物、蚜虫、天敌与蚂蚁之间的种间相互作用数据。 TrophicLevelManipulations.csv 营养级操控分析R代码 本R脚本用于分析干旱是否通过改变蚜虫的多营养级物种互作，进而直接或间接调控蚜虫种群表现，该脚本依赖TrophicLevelManipulations.csv数据文件。 蚂蚁种群数量与资源利用数据集 2012年与2015年通过诱捕陷阱采集的蚂蚁种群数量，以及2015年的蚂蚁诱饵取食量数据。 AntAbundanceResourceUse.csv 2012年蚂蚁分类组成数据集 2012年诱捕陷阱中采集到的蚂蚁分类组成数据。 2012MultivariateData.csv 2015年蚂蚁分类组成数据集 2015年诱捕陷阱中采集到的蚂蚁分类组成数据。 2015MultivariateData.csv 蚂蚁种群数量与资源利用分析R代码 本R脚本用于分析诱捕陷阱中的蚂蚁种群数量、分类组成以及诱饵取食情况，该脚本依赖AntAbundanceResourceUse.csv、2012MultivariateData.csv与2015MultivariateData.csv三个数据文件。 说明文档 本文件包含所有数据文件与R脚本的说明信息。