Raw Data_ZC 20241105.xlsx

We investigated Polyphosphate (polyP) cycling in a cross-latitudinal section (15°N-39°N, 150°E) of the Northwest Pacific Ocean, covering a diverse nutrient gradient and varying P stress conditions, 2023. This data set includes biogeochemical parameters as follows, polyP, Chl a, nutrients, alkaline phosphatase activity (APA), picophytoplankton, total particulate phosphorus (TPP). Detailed methods can be as follows,<br>We used a conductivity-temperature-depth (CTD) instrument cluster (Seabird 911) to collect seawater samplers.<br>Seawater samples were filtered onto GF/F filters to obtain polyP and TPP samplers. PolyP was quantified using a fluorescence method according to the protocol described by Martin et al., 2013, doi: 10.1128/AEM.02592-12. TPP was converted into phosphate and quantified using a UV spectrophotometer (Shi et al., 2019, doi: 10.5194/acp-19-847-2019).<br>APA was calculated through the change of fluorescence using a Turner Trilogy fluorometer, details can be seen in Jin et al., 2024, doi: 10.1038/s41467-024-44838-7.<br>Nutrient samplers were filtered through syringe filters (0.45 μm in core size) and determined by a QuAAtro Continuous-Flow Analyzer (SEAL Analytical) (Grasshoff et al., 1999, Methods of seawater analysis).<br>Chl a samplers were filtered onto Whatman GF/F filters (47 mm in diameter) and were determined using a Turner Trilogy fluorometer (Strickland &amp; Parsons, 1972, A Practical Handbook of Seawater Analysis).<br>Picophytoplankton was determined using a Beckman CytoFLEX Flow Cytometer (Wei et al., 2020, doi: 10.3354/ame01928).