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Temperature-induced copepod depletion and the associated wax of Bellerochea in Belgian coastal waters: Implications and shifts in plankton dynamics
Mortelmans, J.; Semmouri, I.; Perneel, M.; Lagaisse, R.; Amadei Martínez, L.; Rommelaere, Z.; Hablützel, P.; Deneudt, K. (2024). Temperature-induced copepod depletion and the associated wax of Bellerochea in Belgian coastal waters: Implications and shifts in plankton dynamics. J. Sea Res. 201: 102523. https://dx.doi.org/10.1016/j.seares.2024.102523
In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, meer
|   |
| Trefwoorden |
Bellerochea H. Van Heurck, 1885 [WoRMS]
Marien/Kust |
| Author keywords |
Data reusability; Phytoplankton bloom; Integrative use of data; Zooplankton depletion |
| Auteurs | | Top |
- Mortelmans, J.
- Semmouri, I.
- Perneel, M.
- Lagaisse, R.
|
- Amadei Martínez, L.
- Rommelaere, Z.
- Hablützel, P.
- Deneudt, K.
|
|
| Abstract |
Since 2018, severe and recurrent copepod depletions have been observed in Belgian coastal waters. These depletions have been described as temperature-induced mass mortality events. This paper confirms the relation of copepod abundance anomalies with periods of high temperature based on new data. Although severe, the effects, consequences and implications of this depletion remain unknown. Our study suggests that the absence of zooplanktonic predators in autumn, together with the availability of nutrients discharged via the Scheldt estuary, allowed a bloom of the diatom Bellerochea, in a season otherwise characterised by low phytoplanktonic activity. Although the bloom reaches high abundances, its effects on the marine environment are not yet visible. The enormous abundances are likely to induce small-scale oxygen depletions which might further translate to the environment. Communities of Calanoida, Canuelloida and Cyclopoida tend to recover from the annual autumn depletion, although the typical autumn peak is entirely missing in the years subject to severe heat waves and associated high water temperatures. As a result, copepod dynamics have drastically changed since the first observed depletion and associated bloom of Bellerochea in 2018. |
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