Artículo

Lutz, V.; Frouin, R.; Negri, R.; Silva, R.; Pompeu, M.; Rudorff, N.; Cabral, A.; Dogliotti, A.; Martinez, G. "Bio-optical characteristics along the Straits of Magallanes" (2016) Continental Shelf Research. 119:56-67
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Abstract:

The Straits of Magallanes at the tip of South America connects the Atlantic and Pacific Oceans. The variability in the absorption characteristics by phytoplankton (a ph (440)), non-pigmented particles, NPP (a NPP (440)), and chromophoric dissolved organic matter, CDOM (a y (440)), measured along the Straits in late summer 2011 (R/V Melville MV1102 cruise), was analyzed. Satellite-derived monthly PAR data showed that at the time of the cruise the western sector was exposed to a low-light environment (~16 mol quanta m -2 d -1 ) while the eastern sector received higher irradiance (~28 mol quanta m -2 d -1 ). In the Patagonian Shelf total absorption was dominated by phytoplankton (up to 76%; a ph (440)=0.265 m -1 ), while in the Atlantic Sector of the Straits, the major contributor was NPP (up to 42%; a NPP (440)=0.138 m -1 ), and in the Pacific Sector of the Straits CDOM contributed up to 80% of the total absorption (a y (440)=0.232 m -1 ). These changes could be related in part to the input of fresh water from glacier melting and rain in the Pacific Sector (a y (440) vs salinity r s =-0.98). The carbon biomass (C) was composed in its majority by pico-phytoplankton and secondly by nano-phytoplankton, with exception of the Atlantic Sector where the micro-phytoplankton dominated. Carbon to chlorophyll-a ratios (C:Chla) were very low throughout the Straits (average of ~6) because of photoacclimation to the extremely low light. Complementary pigments data obtained in spring 2003 by the BEAGLE expedition indicated the predominance of diatoms all along the Straits, but the bio-optical trend resembled the one found in late summer 2011, i.e., NPP dominated the absorption in the well mixed Atlantic Sector, phytoplankton in the Middle Sector, and CDOM in the Pacific Sector. These results emphasize that underwater light is the major factor affecting phytoplankton growth and physiology, and that prevalent physical and geochemical conditions play an important role regulating the bio-optical properties in this heterogeneous area. These effects should be considered to adjust parameters (such as C:Chla) when running biogeochemical models for this region. © 2016 Elsevier Ltd.

Registro:

Documento: Artículo
Título:Bio-optical characteristics along the Straits of Magallanes
Autor:Lutz, V.; Frouin, R.; Negri, R.; Silva, R.; Pompeu, M.; Rudorff, N.; Cabral, A.; Dogliotti, A.; Martinez, G.
Filiación:IIMyC, CONICET, Mar del Plata, Argentina
INIDEP, Mar del Plata, Argentina
SIO - UCSD, La Jolla, United States
IO-USP, São Paulo, Brazil
INPE/CPTEC, Cachoeira Paulista, São Paulo, Brazil
IB/UFRJ, Rio de Janeiro, RJ, Brazil
IAFE, CONICET/UBA, Buenos Aires, Argentina
Subsecretaría de Pesca y Acuicultura - MAGyP, Buenos Aires, Argentina
Palabras clave:Carbon to chlorophyll ratio; CDOM absorption; Particulate absorption; Photoacclimation; Phytoplankton pigments; Straits of Magallanes; absorption; acclimation; biomass; carbon; chlorophyll; diatom; dissolved organic matter; growth rate; photosynthetically active radiation; physiological response; phytoplankton; seasonal variation; Atlantic Ocean; Atlantic Sector; Magellan Strait; Pacific Sector; Patagonian Shelf; South America; Southern Ocean; Bacillariophyta; Vindula arsinoe
Año:2016
Volumen:119
Página de inicio:56
Página de fin:67
DOI: http://dx.doi.org/10.1016/j.csr.2016.03.008
Título revista:Continental Shelf Research
Título revista abreviado:Cont. Shelf Res.
ISSN:02784343
CODEN:CSHRD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02784343_v119_n_p56_Lutz

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Citas:

---------- APA ----------
Lutz, V., Frouin, R., Negri, R., Silva, R., Pompeu, M., Rudorff, N., Cabral, A.,..., Martinez, G. (2016) . Bio-optical characteristics along the Straits of Magallanes. Continental Shelf Research, 119, 56-67.
http://dx.doi.org/10.1016/j.csr.2016.03.008
---------- CHICAGO ----------
Lutz, V., Frouin, R., Negri, R., Silva, R., Pompeu, M., Rudorff, N., et al. "Bio-optical characteristics along the Straits of Magallanes" . Continental Shelf Research 119 (2016) : 56-67.
http://dx.doi.org/10.1016/j.csr.2016.03.008
---------- MLA ----------
Lutz, V., Frouin, R., Negri, R., Silva, R., Pompeu, M., Rudorff, N., et al. "Bio-optical characteristics along the Straits of Magallanes" . Continental Shelf Research, vol. 119, 2016, pp. 56-67.
http://dx.doi.org/10.1016/j.csr.2016.03.008
---------- VANCOUVER ----------
Lutz, V., Frouin, R., Negri, R., Silva, R., Pompeu, M., Rudorff, N., et al. Bio-optical characteristics along the Straits of Magallanes. Cont. Shelf Res. 2016;119:56-67.
http://dx.doi.org/10.1016/j.csr.2016.03.008