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2. Polar marine biology science in Portugal and Spain: Recent advances and future perspectives

Author

Xavier, José C., Barbosa, Andrés, Agustí, Susana, Alonso-Sáez, Laura, Alvito, Pedro, Ameneiro, Julia, Ávila, Conxita, Baeta, Alexandra, Canário, João, Carmona, Raquel, Catry, Paulo, Ceia, Filipe, Clark, Melody S., Cristobo, Francisco J., Cruz, Bruno, Duarte, Carlos M., Figuerola, Blanca, Gili, Josep-Maria, Gonçalves, Ana R., Gordillo, Francisco J.L., Granadeiro, José P., Guerreiro, Miguel, Isla, Enrique, Jiménez, Carlos, López-González, Pablo J., Lourenço, Sílvia, Marques, João C., Moreira, Elena, Mota, Ana M., Nogueira, Marta, Núñez-Pons, Laura, Orejas, Covadonga, Paiva, Vitor H., Palanques, Albert, Pearson, Gareth A., Pedrós-Alió, Carlos, Peña Cantero, Álvaro L., Power, Deborah M., Ramos, Jaime A., Rossi, Sergi, Seco, José, Sañé, Elisabet, Serrão, Ester A., Taboada, Sergi, Tavares, Sílvia, Teixidó, Núria, Vaqué, Dolors, Valente, Tiago, Vázquez, Elsa, Vieira, Rui P., and Viñegla, Benjamin

Published
2013
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7. Water mass mixing shapes bacterial biogeography in a highly hydrodynamic region of the Southern Ocean.

Author

Hernando ‐ Morales, Víctor, Ameneiro, Julia, and Teira, Eva

Subjects
*WATER masses, *MARINE microbiology, *BIOGEOGRAPHY, *HYDRODYNAMICS
Abstract

Even though compelling evidences indicate that marine microbes show biogeographic patterns, very little is known on the mechanisms driving those patterns in aquatic ecosystems. In the present study, bacterial community structure was examined in epipelagic waters of a highly hydrodynamic area of the Southern Ocean to gain insight into the role that biogeochemical factors and water mass mixing (a proxy of dispersal) have on microbial biogeography. Four water masses that converge and mix around the South Shetland Islands (northern tip of the Antarctic Peninsula) were investigated. Bacterioplankton communities were water-mass specific, and were best explained by dispersal rather than by biogeochemical factors, which is attributed to the relatively reduced environmental gradients found in these cold and nutrient rich waters. These results support the notion that currents and water mixing may have a considerable effect in connecting and transforming different water bodies, and consequently, in shaping communities of microorganisms. Considering the multidimensional and dynamic nature of the ocean, analysis of water mass mixing is a more suitable approach to investigate the role of dispersal on the biogeography of planktonic microorganisms rather than geographical distance. [ABSTRACT FROM AUTHOR]

Published
2017
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