DOI: 10.5061/dryad.3j9kd51rb
title: Data for: Extreme drought impacts have been underestimated in grasslands and shrublands globally

description: Data for publication "Extreme drought impacts have been
 underestimated in grasslands and shrublands globally." In this
 publication, we used a globallly distributed network of drought
 experiments to assess the impact of extreme, single-year drought events on
 aboveground net primary productions in grassland and shrubland ecosystems.
 The data and script necessary to reproduce figures and analyses for the
 manuscript may be found in this repository. The single script combines all
 of the data frames in order to run statistical models, create figures, and
 produce any additional statistics referenced in the publication. Data in
 this repository include the reponses of aboveground net primary production
 to drought treatments at 100 sites, abiotic information about the sites
 such as mean annual precipitation, annual precipitaiton, and soil sand
 content, along with biotic characteristics about these sites including
 species richness and the percent of vegetative cover by
 graminoids. Though the data published here may be freely reused,
 we encourage users to contact the authors of this dataset and the linked
 publication in order to facilitate the best practices for use of data.
description: Aboveground net primary production data were collected in 100
 drought experiments around the world. These data and scripts were used to
 explain responses of plant production to drought experiments. Please see
 published manuscript for detailed methods.
description: # Data for "Extreme drought impacts have been underestimated in
 grasslands and shrublands globally" ## Description of the data and
 file structure The structure of this repository is relatively simple, with
 one single R script (Dryad_submission.R) which uses data from seven .csv
 files in order to reproduce results and figures from the publication. The
 datasets can all be linked by the site_code column which is the unique
 identifier for each of the 100 sites in the study.
 Dryad_data_site_info.csv This file includes information for the sites in
 the Drought Network International Drought Experiment including the full
 name, continent, country, habitat type, mean annual precipitation, and
 aridity index values. **dt3.all.csv** Contains information as to the mean
 drought response at each site (mean_DS3), number of replicates at each
 site (n), standard deviation of response (sd), standard error of response
 (se), lower and upper bounds of 95% confidence interval, and whether the
 site was significantly different from zero. **drt3.120.csv** Contains
 information as to the mean drought response at each site (mean_DS3),
 number of replicates at each site (n), standard deviation of response
 (sd), standard error of response (se), lower and upper bounds of 95%
 confidence interval, and whether the site was significantly different from
 zero. **Dryad_submission_datappt_cv2.csv** Includes dt3.all plus the
 interannual precipitation variability (cv_ppt_inter)
 **Dryad_submission_datappt_rich2.csv** Includes dt3.all plus the average
 richness at each site **drt.ave.csv** Includes drought severity
 (drtpct_map), number of treatment days, and response (mean_DS3)
 **ds.map.csv** Plot level precipitation values
 **Dryad_submission_gram.ave.csv** Includes the proportion of vegetative
 cover from graminoids at each site **Dryad_submission_datapptsand2.csv**
 Includes dt3.all plus the average sand content for each site
 **Dryad_data_site_info.csv** Includes information about continent,
 country, mean annual precipitation (precip), and aridity (arid) for each
 site **datapptgram1.csv** Plot level percent graminoid **climdat2.csv**
 Includes mean annual precipitation (precip) and mean annual temperature
 (temp) for each site **datappt_pryr.csv** Includes dt3.all plus the
 drought severity of the prior year (drtpct_map730) **datappt_MAP2.csv**
 Includes dt3.all plus mean annual precipitation (precip)
 **datappt_ai3.csv** Includes dt3.all plus the log of the aridity index
 (logAI) **data.mean1.csv & data.hab.csv** Same variables as defined in
 dt3.all **data.Drtsite.csv** Includes whether each site experiences
 extreme or not extreme drought, along with the mean drought severity,
 number of replicates, and upper and lower confidence intervals. 
 
 ## Sharing/Access information Please contact the authors if you are
 interested in using these data. The data are free to reuse but contacting
 the authors prior to reuse will ensure the data are used according to best
 practices.