TY - RPRT TI - Assessing spatial variability of nutrients, phytoplankton, and related water-quality constituents in the California Sacramento–San Joaquin Delta at the landscape scale—Comparison of four (2018, 2020, 2021, 2022) spring high-resolution mapping surveys AU - Emily Richardson AU - Tamara Kraus AU - Katy O’Donnell AU - Jeniffer Soto-Perez AU - Crystal Sturgeon AU - Elizabeth Stumpner AU - Brian Bergamaschi PY - 2025 DO - 10.3133/sir20255035 UR - https://pubs.usgs.gov/publication/sir20255035 ID - sir20255035 ER -