Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/130121
Título: Surface productivity gradients govern changes in the viability of deep ocean prokaryotes across the tropical and subtropical Atlantic
Autores/as: Gómez Letona,Markel 
Arístegui Ruiz, Javier 
Hernandez Hernandez,Nauzet 
Pérez-Lorenzo, María
Álvarez-Salgado, Xosé Antón
Teira, Eva
Sebastián Caumel, Marta 
Clasificación UNESCO: 2510 Oceanografía
Fecha de publicación: 2022
Publicación seriada: Limnology and Oceanography 
Resumen: Prokaryotes represent a major fraction of marine biomass and play a key role in the global carbon cycle. We studied the vertical profiles (0–3500 m) of abundance, viability, and activity of prokaryotic communities along a productivity gradient in the subtropical and tropical Atlantic to assess whether there is a vertical linkage between surface productivity regimes and deep ocean prokaryotic communities. We found that latitudinal changes in the vertical patterns of cytometric variables were coupled with surface productivity: higher prokaryotic abundances and viabilities, and smaller cell sizes were observed below highly productive surface waters, an effect reaching down to the bathypelagic layer. Leucine uptake rates in deep waters showed no clear relationship with surface productivity. Changes in resource and energy allocation to growth vs. maintenance in hostile environments, cell-size-dependent metabolic requirements, and variability in leucine-to-carbon conversion may all be part of the array of factors involved in controlling the prokaryotic activity patterns that were measured. Our work adds to the recent findings that highlight the importance of vertical connectivity for prokaryotic communities in the dark ocean and unveils a remarkable impact of surface conditions in the viability of deep ocean prokaryotes. This is a key aspect when considering metabolic rates of prokaryotic communities in the bathypelagic realm.
URI: http://hdl.handle.net/10553/130121
ISSN: 0024-3590
DOI: 10.1002/lno.12248
Fuente: Limnology and Oceanography [ISSN 0024-3590], v. 68, n. 1, p. 56-69, (January 2023)
Colección:Artículos
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