Enzyme activity during a mesocosm experiment in the Peruvian upwelling system ...

• Main Authors: Spilling, Kristian, Piiparinen, Jonna, Achterberg, Eric Pieter, Arístegui, Javier, Bach, Lennart Thomas, Camarena-Gómez, Maria-Teresa, von der Esch, Elisabeth, Fischer, Martin A, Gómez-Letona, Markel, Hernández-Hernández, Nauzet, Meyer, Judith, Schmitz, Ruth A, Riebesell, Ulf
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2023
• Subjects: alkaline phosphatase activity; Bacteria; chlorophyll-a; leucine aminopeptidase; oxygen minimum zone; Phytoplankton; Climate - Biogeochemistry Interactions in the Tropical Ocean SFB754; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean AQUACOSM; Arctic
• Online Access: https://dx.doi.org/10.1594/pangaea.958426; https://doi.pangaea.de/10.1594/PANGAEA.958426

The data is from a mesocosm experiment set up outside Lima, Peru to study the influence of upwelling of oxygen minimum zone (OMZ) water. The mesocosm bags were 2 m in diameter and extended from the surface down to 19 m depth, where the last 2 m was a conical sediment trap. Eight mesocosm bags were used and they were moored at 12.0555°S; 77.2348°W just north of Isla San Lorenzo where the water depth is ~30 m. The experiment was started 25 February 2017 by closing the mesocosm bags and were run for 50 days. Two treatments were used (water with different OMZ signature), each with four replicates. Water (100 m3) from the OMZ was collected from two locations and depths. The first was collected from 12.028323°S; 77.223603°W from 30 m depth, and the second one from 12.044333°S; 77.377583°W from 70 m depth. The original aim was to collect severe and moderate OMZ signature water (differing in e.g. nitrate concentrations) from the first and second site, respectively. This assumption was based on long-term monitoring ...