Phytoplankton Spring Bloom Inhibited by Marine Heatwaves in the North‐Western Mediterranean Sea
Abstract Marine heatwaves (MHWs) represent anomalously warm temperature conditions of seawater that may affect marine life and ocean biogeochemistry. Under such conditions, phytoplankton communities may modify their structure and functions, and their resilience is not assured. This study characterizes the impact of MHWs on the phytoplankton spring bloom in the North‐Western Mediterranean Sea. Here, we synergistically combine autonomous observations from BioGeoChemical‐Argo floats, satellite‐based and marine ecosystem model data, and show that MHW events occurring during winter drastically inhibit phytoplankton carbon biomass in spring by up to 70%. Such reduction is related to the enhanced stratification of the water column under MHWs which hinders the renewal of nutrients from deep‐ocean reservoirs, thus preventing surface phytoplankton from blooming. This process negatively impacts particulate organic carbon stocks within the mixed layer, while severe events cause an earlier shift of phytoplankton phenology that provokes changes in zooplankton biomass distribution.
Authors
- Andrea Pisano (ORCID: https://orcid.org/0000-0002-9465-8457)
- Rosalia Santoleri (ORCID: https://orcid.org/0000-0002-2900-5054)
- Federico Serva (ORCID: https://orcid.org/0000-0002-7118-0817)
- Emanuele Organelli (ORCID: https://orcid.org/0000-0001-8191-8179)
- Simon Van Gennip (ORCID: https://orcid.org/0000-0002-3758-7090)
- Fang Shen (ORCID: https://orcid.org/0000-0001-5350-7129)
- Marco Bellacicco (ORCID: https://orcid.org/0000-0002-0477-173X)
- Salvatore Marullo (ORCID: https://orcid.org/0000-0003-4203-0956)
- Mengyu Li (ORCID: https://orcid.org/0000-0003-0939-7406)
- Angela Landolfi (ORCID: https://orcid.org/0000-0002-5000-7863)
- Alexandre Mignot (ORCID: https://orcid.org/0000-0002-2948-1608)
Institutions
- Istituto di Scienze Marine del Consiglio Nazionale delle Ricerche (IT)
- Mercator Ocean (France) (FR)
- National Research Council (IT)
- State Key Laboratory of Estuarine and Coastal Research
- East China Normal University (CN)
Publication Details
- Journal
- Geophysical Research Letters
- Published
- 2024-10-14
- DOI
- https://doi.org/10.1029/2024gl109141
- Citations
- 19
- Primary Topic
- Marine and coastal ecosystems
- Type
- article
- Field-Weighted Citation Impact
- 9.13
Funders
- European Space Agency
- National Natural Science Foundation of China
- China Scholarship Council