Dataset DOI: 10.5061/dryad.np5hqc05h

Description of the Data and File Structure

The structure of this repository is relatively simple, with one R script (code_for_submission.R) that uses data from five .csv files to reproduce results and figures from the publication. The datasets can all be linked by the site_code column, which serves as a unique identifier for each site in the study.

data.anpp.summary.csv

• site_code – Unique identifier for each site
• year – Year of data collection
• drtsev.1 to drtsev.4 – Drought severity calculated from precipitation in drought treatment plots for various time intervals before sampling
• n_treat_years – Number of years since treatments started
• map – Site-reported mean annual precipitation
• habitat.type – Standardized habitat type of the site
• e.n, prev_e.n, prev_e.n2, prev_e.n3 – Extreme/nominal status for different time windows prior to sampling
• PctAnnual – Percent of pretreatment cover of annual plant species
• Ann_Per – Indicates whether the site is annual- or perennial-dominated
• ipcc_regions – Reference region per IPCC guidelines
• mean_mass
• ppt.1 – Precipitation for 0–365 days before sampling
• anpp_response – Productivity response ratio
• anpp_response.error – 95% CI for productivity response ratio
• anpp_response.se – Standard error for productivity response ratio
• percent.reduction, percent.reduction.error, percent.reduction.se – Percent productivity reduction and associated error estimates
• n_treat_days – Number of treatment days
• type

ai_pet_04-18-2022.csv

• site_code, site_id,site_worldclim_id – Site identifiers
• MAT_v2, MAT_RANGE_v2 – Mean annual temperature and range (°C)
• ISO_v2 TEMP_VAR_v2 – Iso/anisohydry index and temperature variation
• MAX_TEMP_v2, MIN_TEMP_v2 – Max and min temperatures (°C)
• ANN_TEMP_RANGE_v2 – Annual temperature range (°C)
• TEMP_WET_Q_v2, TEMP_DRY_Q_v2, TEMP_WARM_Q_v2, TEMP_COLD_Q_v2 – Seasonal temperatures (°C)
• MAP_v2, MAP_WET_M_v2, MAP_DRY_M_v2, MAP_VAR_v2 – Mean annual and seasonal precipitation (mm)
• MAP_WET_Q_v2, MAP_DRY_Q_v2, MAP_WARM_Q_v2, MAP_COLD_Q_v2 – Seasonal precipitation (mm)
• PET, RAIN_PET – Potential evapotranspiration
• AI – Aridity index
• Insulation – Average annual insulation

climate_mean_annual_by_site_v2.csv

• site_code – Unique identifier for each site
• ppt_max_event, ppt_mean_event – Size of the largest and mean precipitation events (mm)
• days_half_ppt – Days to reach half of annual precipitation
• daily_ppt_d, yearly_ppt_d – Intra- and interannual precipitation variability (D metric)
• n_wet_days – Number of precipitation events per year
• MAP – Mean annual precipitation (mm/yr)
• avg_dryspell_length – Days between wet events
• ppt_95th_percentile_size – Size of the top 5% of precipitation events
• cv_ppt_intra – Intra-annual precipitation variability (CV)
• cv_ppt_inter – Interannual precipitation variability (CV of annual totals)
• seasonality_index – Calculated as per Walsh and Lawler (1981):
  SI = sum(abs(x - Ri/12)) / Ri, where x is monthly ppt, Ri is annual ppt

gain_losses.csv

• site_code, year, n_treat_years – Site ID, year, and treatment duration
• measure – Metric calculated (e.g., richness, abundance)
• RR – Response ratio
• trt – All drought (used in RR calculation)
• map, MAP – Mean annual precipitation (reported vs. MSWEP)
• drtseverity – Drought severity (0–365 days prior to sampling)
• PctAnnual, PctGrass – Pretreatment cover percentages
• cv_ppt_inter, seasonality_index – Precipitation variability and seasonality
• MAT2 – Mean annual temperature
• richness – Species richness
• deltaabund – Change in abundance

site_sand_from_soilgrid.csv

• site_code – Unique identifier for each site
• sand_mean – Average sand percentage (all depths)
• sand0_5, sand5_15, sand15_30, sand30_60, sand60_100 – Sand content by soil depth (cm)

Sharing / Access Information

Please contact the authors if you are interested in using these data. The data are free to reuse, but reaching out beforehand ensures proper understanding of context and best practices for use.