Diurnal variability in alkaline phosphatase activity and alkaline phosphatase activity associated with zooplankton in subtropical North Atlantic (2010 to 2017).

• Main Authors: Davis, Clare, Mahaffey, Claire
• Format: Dataset
• Language: English
• Published: British Oceanographic Data Centre, Natural Environment Research Council 2019
• Subjects: biota; oceans; North Atlantic
• Online Access: https://dx.doi.org/10.5285/80850823-28e1-3d69-e053-6c86abc083d5; https://www.bodc.ac.uk/data/published_data_library/catalogue/10.5285/80850823-28e1-3d69-e053-6c86abc083d5/

This dataset contains fractional change in volumetric rates of alkaline phosphatase activity (APA) over time determined from near surface samples and APA rates determined during incubation experiments using zooplankton collected from the subtropical North Atlantic Ocean. Samples used in the final analyses were collected on-board the RRS James Clark Ross cruise JR15007 (June to July 2016), RRS James Cook cruise JC150 (June to August 2017) and a previously published dataset from Dr Oliver Wurl using samples collected on-board Research Vessel Knorr 199-5, a US GEOTRACES cruise. Water samples collected on-board JC150 and JR15007 were collected using CTDs or towed fish sampling methods and analysed to calculate near surface APA, dissolved phosphate concentrations and to perform picophytoplankton and heterotrophic bacteria analysis to calculate total cell abundance. Zooplankton samples were collected via net hauls and plankton tows and used in a series of incubation experiments to assess the impact of Zooplankton on APA. Samples collected on-board cruise JC150 were funded as part of the Natural Environment Research Council (NERC) standard grant - Zinc, iron and phosphorus co-limitation in the Ocean (ZIPLOc) reference NE/N001079/1, lead by Principal Investigator Dr Claire Mahaffey and Co-Investigator Dr Clare Davis. Samples collected on cruise JR15007 were funded by NERC Grant NE/L004216/1 - A nutrient and carbon pump over mid-ocean ridges (RidgeMix), lead by Principal Investigator Professor Jonathan Sharples. The third party data provided by Dr Oliver Wurl were funded by the US National Science Foundation, Division of Ocean Sciences (Grants OCE 0929573 and OCE 0926092 to Professor G.Cutter).