Schukat, Anna; Massing, Jana Chiara; Auch, Dominik; Dorschner, Sabrina; Welker, Annelie; Hagen, Wilhelm; Auel, Holger (2022): Fatty acid and stable isotope composition of zooplankton, fishes and sea birds from the northern Humboldt Current System during Maria S. Merian cruise MSM80 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.949801
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Abstract:
A combined stable isotope and fatty acid trophic biomarker approach was adopted for key zooplankton taxa and higher trophic positions of the northern Humboldt Current System to elucidate the pelagic food-web structure and to better understand trophic interactions. Samples covered an extensive spatial range from 8.5°S to 16°S and a vertical range down to 1,000 m depth. Immediately after each haul, specimens were sorted alive in the lab and apparently live and healthy individuals were stored in vials and deep-frozen at -80°C until further lipid and stable isotope analyses. The comprehensive data set covered over 20 zooplankton taxa and indicated that three biomass-rich crustacean species usually dominated the zooplankton community, i.e., the copepods Calanus chilensis at the surface and Eucalanus inermis in the pronounced oxygen minimum zone and the krill Euphausia mucronata, resulting in an overall low number of major trophic pathways toward anchovies. In addition, the semi-pelagic squat lobster Pleuroncodes monodon appears to play a key role in the benthic-pelagic coupling. By partly feeding on benthic resources and by diel vertical migration, P. monodon provides a unique pathway for returning carbon and energy from the sea floor to the epipelagic layer, increasing the food supply for pelagic fish.
Related to:
Massing, Jana Chiara; Schukat, Anna; Auel, Holger; Auch, Dominik; Kittu, Leila; Pinedo Arteaga, Elda Luz; Correa Acosta, Jonathan; Hagen, Wilhelm (2022): Toward a Solution of the “Peruvian Puzzle”: Pelagic Food-Web Structure and Trophic Interactions in the Northern Humboldt Current Upwelling System Off Peru. Frontiers in Marine Science, 8, 759603, https://doi.org/10.3389/fmars.2021.759603
Project(s):
Coverage:
Median Latitude: -12.196214 * Median Longitude: -77.595513 * South-bound Latitude: -16.051983 * West-bound Longitude: -80.987767 * North-bound Latitude: -8.499733 * East-bound Longitude: -74.159183
Date/Time Start: 2018-12-27T23:39:00 * Date/Time End: 2019-01-25T08:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets
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Datasets listed in this bundled publication
- Schukat, A; Massing, JC; Dorschner, S et al. (2022): Fatty acid composition of zooplankton, fishes and sea birds from the northern Humboldt Current System during Maria S. Merian cruise MSM80. https://doi.org/10.1594/PANGAEA.949562
- Schukat, A; Massing, JC; Auch, D et al. (2022): Stable isotope composition of zooplankton, fishes and sea birds from the northern Humboldt Current System during Maria S. Merian cruise MSM80. https://doi.org/10.1594/PANGAEA.949564