Distinctive chemotactic responses of three marine herbivore protists to DMSP and related compounds.
ISME J
; 18(1)2024 Jan 08.
Article
en En
| MEDLINE
| ID: mdl-38995932
ABSTRACT
Marine planktonic predator-prey interactions occur in microscale seascapes, where diffusing chemicals may act either as chemotactic cues that enhance or arrest predation, or as elemental resources that are complementary to prey ingestion. The phytoplankton osmolyte dimethylsulfoniopropionate (DMSP) and its degradation products dimethylsulfide (DMS) and acrylate are pervasive compounds with high chemotactic potential, but there is a longstanding controversy over whether they act as grazing enhancers or deterrents. Here, we investigated the chemotactic responses of three herbivorous dinoflagellates to point-sourced, microscale gradients of dissolved DMSP, DMS, and acrylate. We found no evidence for acrylate being a chemotactic repellent and observed a weak attractor role of DMS. DMSP behaved as a strong chemoattractor whose potential for grazing facilitation through effects on swimming patterns and aggregation depends on the grazer's feeding mode and ability to incorporate DMSP. Our study reveals that predation models will fail to predict grazing impacts unless they incorporate chemotaxis-driven searching and finding of prey.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Compuestos de Sulfonio
/
Dinoflagelados
/
Quimiotaxis
/
Herbivoria
Límite:
Animals
Idioma:
En
Revista:
ISME J
Asunto de la revista:
MICROBIOLOGIA
/
SAUDE AMBIENTAL
Año:
2024
Tipo del documento:
Article
País de afiliación:
España
Pais de publicación:
Reino Unido