DOI: 10.5061/dryad.gmsbcc2xd
title: Data from: Repeated high severity fire effects on soil biogeochemistry in the Sierra Nevada, California

description: Dataset on the impacts of repeated high severity fire on soil
 biogeochemistry. Soil sample (0-5 cm) measurements include bulk soil
 carbon and nitrogen concentration, carbon dioxide efflux (from laboratory
 incubation), inorganic nitrogen concentrations and fluxes, and soil carbon
 and nitrogen in mineral-associated and particulate organic matter.
description: # Data from: Repeated high severity fire effects on soil biogeochemistry
 in the Sierra Nevada, California Dataset DOI:
 [10.5061/dryad.gmsbcc2xd](10.5061/dryad.gmsbcc2xd) ## Description of the
 data and file structure Soils were collected (0-5 cm) from sites at
 differing stages of recovery from a first or second high severity fire for
 varied laboratory analyses. ### Files and variables #### File:
 bulksoildata.csv **Description:** Data from bulk soil samples. #####
 Variables * Sample ID: The site name followed by the field replicate
 number. Site names describe the year the site was burned. Sites recovering
 from one fire are labeled as 2007, 2019, or 2021. Sites recovering from
 two fires are labeled as 0719 (burned in 2007 and 2019) or 0721 (burned in
 2007 and 2021). The "unburned" site (100+ years since last fire)
 is labeled as UB. There were six field replicates per site. *
 SampleWeight_mg: Sample weight (mg). * gCperg: Grams of carbon per gram of
 soil. * gNperg: Grams of nitrogen per gram of soil. * percentC: Soil
 carbon concentration (%). * percentN: Soil nitrogen concentration (%). *
 cumulativeCO2: Cumulative carbon dioxide efflux from incubations (grams of
 carbon per gram of soil per hour). * NH4pre: Soil ammonium concentration
 at incubation start (grams of nitrogen per kilogram of soil). * NO3pre:
 Soil nitrate concentration at incubation start (grams of nitrogen per
 kilogram of soil). * NH4post: Soil ammonium concentration at incubation
 end (grams of nitrogen per kilogram of soil). * NO3post: Soil nitrate
 concentration at incubation end (grams of nitrogen per kilogram of soil).
 * netNH4: Net change in soil ammonium over the incubation. * netNO3: Net
 change in soil nitrate over the incubation. #### File: CN_fractions.csv
 **Description:** Data from the soil size fractions. ##### Variables *
 Sample ID: The site name followed by the field replicate number and soil
 size fraction. Site names describe the year the site was burned. Sites
 recovering from one fire are labeled as 2007, 2019, or 2021. Sites
 recovering from two fires are labeled as 0719 (burned in 2007 and 2019) or
 0721 (burned in 2007 and 2021). The "unburned" site (100+ years
 since last fire) is labeled as UB. There were six field replicates per
 site. Soil size fractions include clay, silt, and sand. *
 SampleWeight_mg: Sample weight (mg). * percentN: Grams of nitrogen per
 gram of soil. * percentC: Grams of carbon per gram of soil. * gFracgsoil:
 Grams of soil fraction per gram of soil. * gCpergfrac: Grams of carbon per
 gram of soil fraction. * gNpergfrac: Grams of nitrogen per gram of soil
 fraction. * CNratio: Carbon:nitrogen ratio. There is one NA value where
 CNratio was not calculated due to an outlying percentN value for the
 sample. ## Code/software Data can be viewed in any software capable of
 opening csv files.