Viral communities' distribution among four contrasting areas in the Southern Ocean and their implication to marine aerosol formation

• Main Author: Sotomayor Garcia, Ana
• Other Authors: Vaqué, Dolors, Ministerio de Economía y Competitividad (España)
• Format: Master Thesis
• Language: unknown
• Published: CSIC - Instituto de Ciencias del Mar (ICM) 2017
• Subjects: Antarctic; Antarctic Ocean; Antarctic Peninsula; Anvers; South Georgia Island; Southern Ocean; The Antarctic; Vidal; Antarc*
• Online Access: http://hdl.handle.net/10261/158666; https://doi.org/10.13039/501100003329

Trabajo final presentado por Ana Sotomayor Garcia para el Máster en Biodiversidad Marina y Conservación, realizado bajo la dirección de la Dra. Dolors Vaqué Vidal del Institut de Ciències del Mar (ICM-CSIC).-- 40 pages Marine viruses play a key role in modulatingseveral biogeochemical cycles, but still, very little is known about their diversity and the structure of their communities. Recently, interest is growing on the marine viruses’ contribution to the secondary marine aerosols formation processes, enhancing the release of cell-enclosed sulphur (DMSP and DMS), hydrocarbons (Isoprene) and organic nitrogen compounds (methylamines), which at some point, can vent to the atmosphere and act as cloud condensation nucleus. Here,we aimed to address whether viral community distribution and structure relate with the concentration of secondary compounds in the water column. For that, we visited contrasting locations during the PEGASO cruise around the Antarctic Peninsula (Orkney, and Anvers Islands) in Antarctic waters, and nearby the South Georgia Island (Sub-Antarctic Ocean) with different temperatures and chlorophyll a concentrations (Chl-a). The highest Chl-a, viraland bacterial abundances and temperatures were detected nearby South Georgia. Surface viral communities showed rather homogeneous patterns among zones. However, viruses from the DCM clearly segregated according to the sampling site.Finally, marine viral abundances and their community structures were correlated with secondary compounds concentrations in surface waters, which suggest their effect on the formation of potential precursors to marine aerosols The research was funded by the Spanish Ministery of Economy through projects PEGASO (CTM2012-37615) to R. Simó, BIO-NUC (CGL2013-49020-R) to M. Dall’Osto, and MEFISTO (CTM2013-43767-P) to D. Vaqué Peer Reviewed