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Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open
Journal article
Response of plankton community respiration under variable simulated upwelling events
Frontiers in Marine Science, Vol.9, pp.1-12
14/10/2022
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Abstract
Climate change is expected to alter the intensity and frequency of upwelling in high productive coastal regions, thus impacting nutrient fluxes, primary productivity and consequently carbon cycling. However, it is unknown how these changes will impact the planktonic (phytoplankton and bacteria) community structure, which affects community respiration (CR) and hence the carbon available for sequestration or transfer to upper trophic levels. Here we present results from a 37-day mesocosm experiment where we examined the response of CR to nutrient additions by simulating upwelling events at different intensities (low, medium, high and extreme) and modes (singular and recurring additions). We also analysed the potential contribution of different plankton size classes and functional groups to CR. The trend in accumulated CR with respect to nutrient fertilisation (total nitrogen added during the experiment) was linear in the two modes. Microplankton (mostly diatoms) and nanoplankton (small flagellates) dominated under extreme upwelling intensities and high CR in both singular and recurring upwelling modes, explaining >65% of the observed variability in CR. In contrast, prokaryotic picoplankton (heterotrophic bacteria and autotrophic cyanobacteria) explained <43% of the variance in CR under the rest of the upwelling intensities and modes tested. Changes in planktonic community structure, while modulating CR variability, would regulate the metabolic balance of the ecosystem, shifting it towards net-heterotrophy when the community is dominated by small heterotrophs and to net-autotrophy when large autotrophs prevail; although depending on the mode in which nutrients are supplied to the system. This shift in the dominance of planktonic organism will hence affect not only CR but also carbon sequestration in upwelling regions
Details
- Title
- Response of plankton community respiration under variable simulated upwelling events
- Creators
- Isabel Baños - Universidad de Las Palmas de Gran CanariaJavier Arístegui - Universidad de Las Palmas de Gran CanariaMar Benavides - Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO, Marseille, FranceMarkel Gómez-Letona - Oceanografía Biológica, Instituto de Oceanografía y Cambio Global (IOCAG), Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, SpainMaría F. Montero - Oceanografía Biológica, Instituto de Oceanografía y Cambio Global (IOCAG), Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, SpainJoaquín Ortiz - Marine Biogeochemistry, Biological Oceanography, GEOMAR Helmholtz Center for Ocean Research, Kiel, GermanyKai G. Schulz - Southern Cross UniversityAndrea Ludwig - GEOMAR Helmholtz Centre for Ocean Research KielUlf Riebesell - GEOMAR Helmholtz Centre for Ocean Research Kiel
- Publication Details
- Frontiers in Marine Science, Vol.9, pp.1-12
- Publisher
- Frontiers Research Foundation
- Grant note
- This study was carried out within the framework of the Ocean Artificial Upwelling project (Ocean artUp, No. 695094), funded by an Advanced Grant of the European Research Council (ERC). Additional support was provided through projects TRIATLAS (AMD-817578-5) from the European Union’s Horizon 2020, FONIAC 2019 (Fundación Caja Canarias and Fundación Bancaria La Caixa), and e-IMPACT (PID2019-109084RB-C2) funded by the Spanish National Science Plan. IB is supported by a FPI fellowship (BES-2016-078407) from the Spanish Ministry of Economy, Industry and Competitiveness (MINECO). MGL is supported by the Ministerio de Ciencia, Innovación y Universidades, Gobierno de España (FPU17-01435) during his PhD. JA was supported by a Helmholtz International Fellow Award, 2015 (Helmholtz Association, Germany). JA also acknowledges support from the United States National Science Foundation grant OCE-1840868 to the Scientific Committee on Oceanic Research (SCOR, United States) WG 155.
- Identifiers
- 991013055109002368
- Copyright
- © 2022 Baños, Arístegui, Benavides, Gómez-Letona, Montero, Ortiz, Schulz, Ludwig and Riebesell. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
- Academic Unit
- Faculty of Science and Engineering; Science; Centre for Coastal Biogeochemistry
- Language
- English
- Resource Type
- Journal article