Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru)

Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru)

Special issue Ecological and biogeochemical functioning of the coastal upwelling system off Peru: an in situ mesocosm study.-- 25 pages, 9 figures, 5 tables, supplementary material https://doi.org/10.5194/bg-20-945-2023-supplement.-- Data availability: All data are available on the permanent repository: https://www.pangaea.de/ (https://doi.org/10.1594/PANGAEA.947833, Lischka et al., 2022). Publication and usage of these data with respect to access and benefit sharing regulations under the Nagoya protocol were approved by the Peruvian Ministry of Production (PRODUCE)

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Main Authors: Ayón Dejo, Patricia, Pinedo Arteaga, Elda Luz, Schukat, Anna, Taucher, Jan, Kiko, Rainer, Hauss, Helena, Dorschner, Sabrina, Hagen, Wilhelm, Segura i Noguera, María del Mar, Lischka, Silke
Other Authors: Deutsche Forschungsgemeinschaft
Format: artículo biblioteca
Language:English
Published: European Geosciences Union 2023-03
Subjects:Conserve and sustainably use the oceans, seas and marine resources for sustainable development,
Online Access:http://hdl.handle.net/10261/305798
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id dig-icm-es-10261-305798
record_format koha
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Conserve and sustainably use the oceans, seas and marine resources for sustainable development
Conserve and sustainably use the oceans, seas and marine resources for sustainable development
spellingShingle Conserve and sustainably use the oceans, seas and marine resources for sustainable development
Conserve and sustainably use the oceans, seas and marine resources for sustainable development
Ayón Dejo, Patricia
Pinedo Arteaga, Elda Luz
Schukat, Anna
Taucher, Jan
Kiko, Rainer
Hauss, Helena
Dorschner, Sabrina
Hagen, Wilhelm
Segura i Noguera, María del Mar
Lischka, Silke
Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru)
description Special issue Ecological and biogeochemical functioning of the coastal upwelling system off Peru: an in situ mesocosm study.-- 25 pages, 9 figures, 5 tables, supplementary material https://doi.org/10.5194/bg-20-945-2023-supplement.-- Data availability: All data are available on the permanent repository: https://www.pangaea.de/ (https://doi.org/10.1594/PANGAEA.947833, Lischka et al., 2022). Publication and usage of these data with respect to access and benefit sharing regulations under the Nagoya protocol were approved by the Peruvian Ministry of Production (PRODUCE)
author2 Deutsche Forschungsgemeinschaft
author_facet Deutsche Forschungsgemeinschaft
Ayón Dejo, Patricia
Pinedo Arteaga, Elda Luz
Schukat, Anna
Taucher, Jan
Kiko, Rainer
Hauss, Helena
Dorschner, Sabrina
Hagen, Wilhelm
Segura i Noguera, María del Mar
Lischka, Silke
format artículo
topic_facet Conserve and sustainably use the oceans, seas and marine resources for sustainable development
author Ayón Dejo, Patricia
Pinedo Arteaga, Elda Luz
Schukat, Anna
Taucher, Jan
Kiko, Rainer
Hauss, Helena
Dorschner, Sabrina
Hagen, Wilhelm
Segura i Noguera, María del Mar
Lischka, Silke
author_sort Ayón Dejo, Patricia
title Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru)
title_short Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru)
title_full Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru)
title_fullStr Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru)
title_full_unstemmed Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru)
title_sort zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off callao bay (peru)
publisher European Geosciences Union
publishDate 2023-03
url http://hdl.handle.net/10261/305798
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spelling dig-icm-es-10261-3057982023-04-11T08:24:23Z Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru) Ayón Dejo, Patricia Pinedo Arteaga, Elda Luz Schukat, Anna Taucher, Jan Kiko, Rainer Hauss, Helena Dorschner, Sabrina Hagen, Wilhelm Segura i Noguera, María del Mar Lischka, Silke Deutsche Forschungsgemeinschaft Bundesministerium für Bildung und Forschung Agence Nationale de la Recherche (France) Helmholtz Centre for Ocean Research Kiel Agencia Estatal de Investigación (España) Conserve and sustainably use the oceans, seas and marine resources for sustainable development Special issue Ecological and biogeochemical functioning of the coastal upwelling system off Peru: an in situ mesocosm study.-- 25 pages, 9 figures, 5 tables, supplementary material https://doi.org/10.5194/bg-20-945-2023-supplement.-- Data availability: All data are available on the permanent repository: https://www.pangaea.de/ (https://doi.org/10.1594/PANGAEA.947833, Lischka et al., 2022). Publication and usage of these data with respect to access and benefit sharing regulations under the Nagoya protocol were approved by the Peruvian Ministry of Production (PRODUCE) The Humboldt Current Upwelling System (HCS) is the most productive eastern boundary upwelling system (EBUS) in terms of fishery yield on the planet. EBUSs are considered hotspots of climate change with predicted expansion of mesopelagic oxygen minimum zones (OMZs) and related changes in the frequency and intensity of upwelling of nutrient-rich, low-oxygen deep water. To increase our mechanistic understanding of how upwelling impacts plankton communities and trophic links, we investigated mesozooplankton community succession and gut fluorescence, fatty acid and elemental compositions (C, N, O, P), and stable isotope (δ13C, δ15N) ratios of dominant mesozooplankton and microzooplankton representatives in a mesocosm setup off Callao (Peru) after simulated upwelling with OMZ water from two different locations and different N:P signatures (moderate and extreme treatments). An oxycline between 5 and 15 m with hypoxic conditions (<50 µmol L−1) below ∼10 m persisted in the mesocosms throughout the experiment. No treatment effects were determined for the measured parameters, but differences in nutrient concentrations established through OMZ water additions were only minor. Copepods and polychaete larvae dominated in terms of abundance and biomass. Development and reproduction of the dominant copepod genera Paracalanus sp., Hemicyclops sp., Acartia sp., and Oncaea sp. were hindered as evident from accumulation of adult copepodids but largely missing nauplii. Failed hatching of nauplii in the hypoxic bottom layer of the mesocosms and poor nutritional condition of copepods suggested from very low gut fluorescence and fatty acid compositions most likely explain the retarded copepod development. Correlation analysis revealed no particular trophic relations between dominant copepods and phytoplankton groups. Possibly, particulate organic matter with a relatively high C:N ratio was a major diet of copepods. C:N ratios of copepods and polychaetes ranged 4.8–5.8 and 4.2–4.3, respectively. δ15N was comparatively high (∼13 ‰–17 ‰), potentially because the injected OMZ source water was enriched in δ15N as a result of anoxic conditions. Elemental ratios of dinoflagellates deviated strongly from the Redfield ratio. We conclude that opportunistic feeding of copepods may have played an important role in the pelagic food web. Overall, projected changes in the frequency and intensity of upwelling hypoxic waters may make a huge difference for copepod reproduction and may be further enhanced by varying N:P ratios of upwelled OMZ water masses This research has been supported by the Deutsche Forschungsgemeinschaft (through the Collaborative Research Center SFB 754 Climate–Biogeochemistry Interactions in the Tropical Ocean and the Leibniz Award 2012 granted to Ulf Riebesell). Rainer Kiko, Silke Lischka, and Helena Hauss received support by the CUSCO project (Bundesministerium für Bildung und Forschung, grant no. 03F0813A), and Rainer Kiko was further supported via a Make Our Planet Great Again grant of the French Agence Nationale de la Recherche (grant no. ANR-19-MPGA-0012) within the Programme d'Investissements d'Avenir. The article processing charges for this open-access publication were covered by the GEOMAR Helmholtz Centre for Ocean Research Kiel With the institutional support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S) Peer reviewed 2023-04-11T08:24:23Z 2023-04-11T08:24:23Z 2023-03 artículo Biogeosciences 20(5): 945–969 (2023) 1726-4170 CEX2019-000928-S http://hdl.handle.net/10261/305798 10.5194/bg-20-945-2023 1726-4189 en Publisher's version https://doi.org/10.5194/bg-20-945-2023 Sí open European Geosciences Union

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