Por favor, use este identificador para citar o enlazar a este item:
COMPARTIR / IMPACTO:
|Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL|
Growth stimulation of bacterioplankton from deep waters of the NW Mediterranean
|Autor:||Borrull, Encarnación ; Ortega-Retuerta, E. ; Antequera, C. ; Aparicio, Francisco Luis ; Marrasé, Cèlia ; Gasol, Josep M. ; Sala, M. Montserrat|
|Fecha de publicación:||26-nov-2013|
|Citación:||Integrating New Advances in Mediterranean Oceanography and Marine Biology. Meeting program: 54 (2013)|
|Resumen:||Bacteria in the deep ocean are present at very low concentrations, compared to upper layers. A possible limitation of their growth might be the availability or the lability of inorganic or organic nutrients. In order to test this hypothesis, we carried out a set of experiments to study the response of deep-water heterotrophic bacteria to the addition of different organic nutrients. Deep water was collected from the NW Mediterranean Sea in four different cruises during 2012 and 2013 from the same area of the NW Mediterranean. Water was filtered through 0.6 μm to avoid the presence of predators. One-liter microcosms were incubated during 2-3 days in the dark at in situ temperature. Duplicate treatments consisted in the addition of different carbon sources (24 μM C), or inorganic nutrients (ammonium, nitrate and phosphate, final concentrations 2.4, 44.7 and 0.6-1.29 μM, respectively). The results of the first experiments showed that a carbon source (glucose) and not inorganic nutrients, stimulated bacterial growth. This suggested that bacterial limitation was limited by carbon. In the following experiments, a more detailed analysis of the carbon sources that could stimulate the growth of bacterioplankton in deep waters was done. The results of those experiments suggest that bacteria prefer mainly two sources of dissolved organic matter: 1) derived from phytoplanktonic cultures, or 2) water collected from the deep chlorophyll maximum filtered through 0.2 μm. This might be very likely due to its higher complexity, compared to glucose, cellulose or chitin, but also to the higher lability in comparison to dissolved organic matter of river origin|
|Descripción:||Symposium on Integrating New Advances in Mediterranean Oceanography and Marine Biology, 26-29 November 2013, Institut de Ciències del Mar (CSIC), Barcelona, Catalunya, Spain|
|Versión del editor:||http://www.icm.csic.es/bio/medocean/information.htm#schedule|
|Aparece en las colecciones:||(ICM) Comunicaciones congresos|
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.