English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/27013
Título

Distribution and abundance of uncultured heterotrophic flagellates in the world oceans

AutorMassana, Ramon ; Terrado, Ramon ; Forn, Irene ; Pedrós-Alió, Carlos
Fecha de publicaciónsep-2006
EditorBlackwell Publishing
Society for Applied Microbiology
CitaciónEnvironmental Microbiology 8(9): 1515-1522 (2006)
ResumenHeterotrophic flagellates play fundamental roles in marine ecosystems as picoplankton grazers. This recognized importance contrasts with our ignorance of the taxonomic composition of this functional group, which remains mostly unidentified by microscopical and culturing approaches. Recent molecular marine surveys based on 18S rDNA genes have retrieved many sequences unrelated to cultured organisms and marine stramenopiles were among the first reported uncultured eukaryotes. However, little is known about the organisms corresponding to these sequences. Here we determine the abundance of several marine stramenopile lineages in surface marine waters using molecular probes and fluorescent in situ hybridization. We show that these protists are free-living bacterivorous heterotrophic flagellates. They were widely distributed, occurring in the five world oceans, and accounted for a significant fraction (up to 35%) of heterotrophic flagellates in diverse geographic regions. A single group, MAST-4, represented 9% of cells within this functional assemblage, with the intriguing exception of polar waters where it was absent. MAST-4 cells likely contribute substantially to picoplankton grazing and nutrient re-mineralization in vast areas of the oceans and represent a key eukaryotic group in marine food webs
Descripción8 pages, 4 figures, 2 tables
Versión del editorhttp://dx.doi.org/10.1111/j.1462-2920.2006.01042.x
URIhttp://hdl.handle.net/10261/27013
DOI10.1111/j.1462-2920.2006.01042.x
ISSN1462-2912 (Print)
1462-2920 (Online)
Aparece en las colecciones: (ICM) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.