Respuesta de la abundancia y estructura de tamaño del bacterioplancton a diferentes condiciones oceanográficas en bahía Chipana (21°20’S)
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| Natura: | Artículo científico |
| Lingua: | es |
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Universidad de Valparaíso
2017
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| _version_ | 1876451381689188352 |
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| author | Edgardo Santander |
| author_facet | Edgardo Santander |
| contents | Respuesta de la abundancia y estructura de tamaño del bacterioplancton a diferentes condiciones oceanográficas en bahía Chipana (21°20’S) Edgardo Santander Enzo Rojas Rubén Moraga Paula Salinas Ciencias de la Tierra volume abundance size structure bacterioplankton Coastal upwelling The relationship between bacterioplankton and oceanographic conditions of an upwelling area of no rthern Chile was analyzed, during two contrasting seasons, emphasizing an approach based in the abundance and size st ructure. The study area was Chipana Bay (21°20’S), and analyzed the summers of 2004-2006 and winters of 2005-2007. The tempe rature, salinity and oxygen were recorded with a CTD and the bacterioplankton and chlorophyll- a samples were obtained at standards depths. The variability of the physical structure of the water column was associated with upwelling, under the i nfluence of the oxygen minimum zone and El Niño-La Niña events. The higher abundance of bacterioplankton was observed in De cember 2004 and July 2005, (1.07×10 9 -5.12×10 9 cell L -1 and 1.44×10 9 cell L -1 , respectively), associated with coastal margin and surface water away from the coast. For 2006 and 2007, a lower abundance was detected in the coastal margin and in the surfac e layer of the offshore stations, the values fluctuated between 6.77 × 10 7 -3.67 × 10 9 cells L -1 , respectively. The use of generalized additive models determined that the best predictors were salinity, dissolved oxygen and the total chlorophyll. The higher cell volumes associated with low abundance, being the dominant structure size 0.4-0.8 and 0.8-1.2 μm in length. This study suggests t hat the abundance and cellular size of bacterioplankton undergo temporal variations that are related to physical factors, mainly salinity and stability of the water column. The observed transition between El Niño and La Niña causes changes in the water co lumn associated with a deepening of the thermocline, which expands and contracts the OMZ, which could eventually affect the productive capacity of the bacterioplankton. 2017 artículo científico 0717-3326 https://www.redalyc.org/articulo.oa?id=47954027004 es http://www.redalyc.org/revista.oa?id=479 Revista de Biología Marina y Oceanografía application/pdf Universidad de Valparaíso Revista de Biología Marina y Oceanografía (Chile) Num.3 Vol.52 |
| format | Artículo científico |
| id | redalyc_47954027004 |
| institution | Redalyc |
| language | es |
| publishDate | 2017 |
| publisher | Universidad de Valparaíso |
| spellingShingle | Respuesta de la abundancia y estructura de tamaño del bacterioplancton a diferentes condiciones oceanográficas en bahía Chipana (21°20’S) Edgardo Santander Ciencias de la Tierra volume abundance size structure bacterioplankton Coastal upwelling Respuesta de la abundancia y estructura de tamaño del bacterioplancton a diferentes condiciones oceanográficas en bahía Chipana (21°20’S) Edgardo Santander Enzo Rojas Rubén Moraga Paula Salinas Ciencias de la Tierra volume abundance size structure bacterioplankton Coastal upwelling The relationship between bacterioplankton and oceanographic conditions of an upwelling area of no rthern Chile was analyzed, during two contrasting seasons, emphasizing an approach based in the abundance and size st ructure. The study area was Chipana Bay (21°20’S), and analyzed the summers of 2004-2006 and winters of 2005-2007. The tempe rature, salinity and oxygen were recorded with a CTD and the bacterioplankton and chlorophyll- a samples were obtained at standards depths. The variability of the physical structure of the water column was associated with upwelling, under the i nfluence of the oxygen minimum zone and El Niño-La Niña events. The higher abundance of bacterioplankton was observed in De cember 2004 and July 2005, (1.07×10 9 -5.12×10 9 cell L -1 and 1.44×10 9 cell L -1 , respectively), associated with coastal margin and surface water away from the coast. For 2006 and 2007, a lower abundance was detected in the coastal margin and in the surfac e layer of the offshore stations, the values fluctuated between 6.77 × 10 7 -3.67 × 10 9 cells L -1 , respectively. The use of generalized additive models determined that the best predictors were salinity, dissolved oxygen and the total chlorophyll. The higher cell volumes associated with low abundance, being the dominant structure size 0.4-0.8 and 0.8-1.2 μm in length. This study suggests t hat the abundance and cellular size of bacterioplankton undergo temporal variations that are related to physical factors, mainly salinity and stability of the water column. The observed transition between El Niño and La Niña causes changes in the water co lumn associated with a deepening of the thermocline, which expands and contracts the OMZ, which could eventually affect the productive capacity of the bacterioplankton. 2017 artículo científico 0717-3326 https://www.redalyc.org/articulo.oa?id=47954027004 es http://www.redalyc.org/revista.oa?id=479 Revista de Biología Marina y Oceanografía application/pdf Universidad de Valparaíso Revista de Biología Marina y Oceanografía (Chile) Num.3 Vol.52 |
| title | Respuesta de la abundancia y estructura de tamaño del bacterioplancton a diferentes condiciones oceanográficas en bahía Chipana (21°20’S) |
| topic | Ciencias de la Tierra volume abundance size structure bacterioplankton Coastal upwelling |
| url | https://www.redalyc.org/articulo.oa?id=47954027004 |