Titre :

Single-celled bioturbators: benthic foraminifera mediate oxygen penetration and prokaryotic diversity in intertidal sediment

Auteur(s) :

Langlet, Dewi [Auteur]
Mermillod-Blondin, Florian [Auteur]
Deldicq, Noémie [Auteur]
Bauville, Arthur [Auteur]
Duong, Gwendoline [Auteur]
Konecny, Lara [Auteur]
Hugoni, Mylène [Auteur]
Denis, Lionel [Auteur]
Université de Lille
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Bouchet, Vincent [Auteur]
Université de Lille
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]

Titre de la revue :

Biogeosciences

Éditeur :

European Geosciences Union

Date de publication :

2023-04-17

ISSN :

1726-4170

Résumé en anglais : [en]

Abstract. Bioturbation processes influence particulate (sediment reworking) and dissolved (bioirrigation) fluxes at the sediment-water interface. Recent works showed that benthic foraminifera largely contribute to sediment ...
Lire la suite >Abstract. Bioturbation processes influence particulate (sediment reworking) and dissolved (bioirrigation) fluxes at the sediment-water interface. Recent works showed that benthic foraminifera largely contribute to sediment reworking in intertidal mudflats; yet their role in bioirrigation processes remains unknown. In a laboratory experiment, we showed that foraminifera motion-behavior increased the oxygen penetration depth and decreased the total organic content. Their activity in the top 5 mm of the sediment also affected prokaryotic community structure. Indeed, in bioturbated sediment, bacterial richness was reduced and sulfate reducing taxa abundance in deeper layers was also reduced, probably inhibited by the larger oxygen penetration depth. Since foraminifera can modify both particulate and dissolved fluxes, their role as bioturbators can no longer be neglected. They are further able to mediate the prokaryotic community, suggesting that they play a major role in the benthic ecosystem functioning and may be the first described single-celled eukaryotic ecosystem engineers.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL