Repeat leaf water potential data from oaks at Sedgwick Reserve, CA.

Data from repeated measurements of predawn and midday water potentials on Quercus agrifolia and Quercus douglassi trees at Sedgwick Reserve, CA, USA from 2022 - 2024. The data includes the following columns: Column name Description individual_id Unique numeric ID for individual tree site Name of site location, represents a spatially distinct group of trees species Quercus agrifolia and Quercus douglassii date date of data collection, in YYYYMMDD pd_md Indicates whether measurements were taken at predawn (pd, 1-3 hours before sunrise) or midday (md, within 1.5 hours of solar noon) water_potential_mean Mean water potential measurements for each tree/date/time (MPa). water_potential_sd Standard deviation of water potential measurements for each tree/date/time (MPa) water_potential_n Number of water potential measurements for each tree/date/time latitude Location of individual tree, latitude in decimal degrees longitude Location of individual tree, longitude in decimal degrees coord_system EPSG:4326-WGS 84 For details on collection methods, see: Boving I, Allen J, Brodrick PG, Chadwick KD, Trugman A, Anderegg LDL. The Unstable Relationship Between Drought Status and Leaf Water Content Complicates the Remote Sensing of Tree Drought Stress. Glob Chang Biol. 2025 Apr;31(4):e70188. doi: 10.1111/gcb.70188. PMID: 40249004; PMCID: PMC12007071.