KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: d15N and trophic level for fish, meso-zooplankton and particulate organic matter ...

• Main Authors: Goldenberg, Silvan Urs, Sswat, Michael, Kittu, Leila, Spisla, Carsten
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: chita; Eastern Boundary Upwelling systems; fish larvae; Humboldt Current System; KOSMOS; mesocosm experiment; Peruvian anchovy; plankton food web; trophic level; δ15N; Type of study; Event label; DATE/TIME; Day of experiment; Treatment: light condition; Treatment; Mesocosm label; Sample type; Organisms; Taxon/taxa, unique identification; Taxon/taxa, unique identification Semantic URI; Taxon/taxa, unique identification URI; Size group description; Number of individuals; Fish, standard length; Wet mass; Dry mass; Carbon content per individual; Nitrogen content per individual; Carbon/Nitrogen ratio; Carbon; Nitrogen; Trophic level; Mesocosm experiment; Measured; Calculated; 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; Zooplankton
• Online Access: https://dx.doi.org/10.1594/pangaea.971267; https://doi.pangaea.de/10.1594/PANGAEA.971267

Trophic structure of plankton communities during the mesocosm experiment in the Peruvian upwelling system near Lima from February-April 2020. Light (ambient = high vs. reduced = low) was manipulated from the beginning (day 0) and upwelling (0 to 60% deep water addition) two weeks into the experiment (day 13). Larvae Peruvian anchovy (Engraulis ringens, 22 days-post-hatch) and chita (Anisotremus scapularis, 44 days-post-hatch) reared in the laboratory were introduced shortly after (day 19). Meso-zooplankton were sampled with small nets at several points in time and the fish once with a large net at the end of the experiment (day 36). Groups of whole meso-zooplankton individuals and muscle tissue of single fish individuals were analysed for C, N and δ15N. Most fish had reached the late larval or early juvenile stage by that time. Particulate organic matter was monitored throughout the entire experiment in 2-day intervals. Trophic level of fish and zooplankton was approximated using particulate organic matter ...