Response of zooplankton community succession and trophic links to simulated upwelling conditions during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru) in austral summer 2017 (KOSMOS 2017 Peru mesocosm study)


Increasing upwelling intensity and shoaling of the oxygen minimum zone (OMZ) is projected for Eastern Boundary Upwelling Systems (EBUSs) under ocean warming which may have severe consequences for mesopelagic food webs, trophic transfer, and fish production also in the Humboldt Current Upwelling System (HUS). To improve our mechanistic understanding, from February 23, 2017 until April 14, 2017 we performed a 50 days mesocosm experiment in the northern HUS (off Callao Bay, Peru) and monitored the zooplankton development prior to and following a simulated upwelling event through the addition of deeper water of two different OMZ-influenced subsurface waters to four of in total eight mesocosms. To elucidate plankton dynamics and trophic relationships, we followed the temporal development of the mesozooplankton community in relation to that of phytoplankton, analyzed the fatty acid composition and gut fluorescence of dominant copepods, and determined the stable isotope (SI) and elemental composition (C:N) of dominant zooplankton taxa. Zooplankton samples were collected from the mesocosms over the entire experiment duration using an Apstein net (17 cm diameter, 100 µm mesh) to determine abundance and taxonomic composition of the zooplankton community, and to analyze fatty acid composition, gut fluorescence and elemental composition of dominant zooplankton. Furthermore, abundance and biomass of zooplankton groups was estimated from scanned ZooScan images.

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Creator Lischka, Silke ORCID logo; Ayón, Patricia; Pinedo Arteaga, Elda Luz; Schukat, Anna ORCID logo; Taucher, Jan ORCID logo; Kiko, Rainer ORCID logo; Hauss, Helena ORCID logo; Dorschner, Sabrina; Hagen, Wilhelm ORCID logo; Segura-Noguera, Mariona ORCID logo
Publisher PANGAEA
Publication Year 2022
Funding Reference Agence Nationale de la Recherche Crossref Funder ID ANR-19-MPGA-0012 Make Our Planet Great Again grant; Federal Ministry of Education and Research Crossref Funder ID 03F0813A Küstennahe Auftriebsgebiete CUSCO: Auswirkungen geänderter Auftriebsintensitäten auf Struktur, Funktion und Produktivität pelagischer Nahrungsnetze im peruanischen Humboldt-Auftriebsgebiet; German Research Foundation Crossref Funder ID 27542298 Climate - Biogeochemistry Interactions in the Tropical Ocean; German Research Foundation Crossref Funder ID RI-598/9-1 Leibniz Award 2012
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 5 datasets
Discipline Biogeochemistry; Biospheric Sciences; Geosciences; Natural Sciences
Spatial Coverage (-77.235 LON, -12.055 LAT)
Temporal Coverage Begin 2017-02-23T00:00:00Z
Temporal Coverage End 2017-04-14T00:00:00Z