KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: biogenic silica concentrations from water samples ...

• Main Authors: Thielecke, Antonia, Smith, Alexandra, Krause, Jeffrey W
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: biogenic silica; Field experiment; Humboldt Current System; light limitation; mesocosm experiment; Upwelling; Type of study; Event label; Mesocosm label; DATE/TIME; Day of experiment; Depth, water, experiment, top/minimum; Depth, water, experiment, bottom/maximum; Treatment light condition; Treatment; Biogenic silica; Biogenic silica, standard deviation; Lithogenic silica; Mesocosm experiment; Spectrophotometer UV/VIS, Thermo Fisher Scientific, Genesys 10; KOSMOS_2020; Coastal Upwelling System in a Changing Ocean CUSCO; 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.961209; https://doi.pangaea.de/10.1594/PANGAEA.961209

This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report biogenic Silica concentrations in the watercolumn collected during a 35-day experiment, where we enclosed natural plankton communities in in-situ mesocosms off Peru. The experiment investigated the interactive effects of light and upwelling on the Humboldt upwelling ecosystem by mimicking a gradient of upwelling intensities (0%, 15%, 30%, 45% and 60%) under summer-time high light and winter-time low light. Integrated seawater samples from a depth between 0 and 10m were collected using a 5L Integrating Water sampler (IWS; Hydro-Bios, Kiel). Samples (0.15-1L) were filtered onto polycarbonate filters (0.65 µm pore size, Whatman). The filters were then dried in the oven at 60 °C for 24 hours and measured following a modified procedure by DeMaster (1981, doi:10.1016/0016-7037(81)90006-5). A standard water bath (Fisher Scientific Isotemp Water Bath, Thermo Fisher Scientific, Waltham, US) was used to digest ... : Mesocosm 10 describes the control sample from the Pacificvalues marked with #: analytically undetectable ...