@Article{LutzFNSPRCDM:2016:BiChAl,
               author = "Lutz, Vivian and Frouin, Robert and Negri, Rub{\'e}n and Silva, 
                         Ricardo and Pompeu, Mayza and Rudorff, Natalia and Cabral, 
                         Anderson and Dogliotti, Ana and Martinez, Gustavo",
          affiliation = "IIMyC and {SIO - UCSD} and INIDEP and INIDEP and {Universidade de 
                         S{\~a}o Paulo (USP)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal do Rio de Janeiro 
                         (UFRJ)} and IAFE, CONICET/UBA and {Subsecretar{\'{\i}}a de Pesca 
                         y Acuicultura - MAGyP}",
                title = "Bio-optical characteristics along the Straits of Magallanes",
              journal = "Continental Shelf Research",
                 year = "2016",
               volume = "119",
                pages = "55--67",
                month = "May",
             keywords = "Carbon to chlorophyll ratio, CDOM absorption, Particulate 
                         absorption, Photoacclimation, Phytoplankton pigments, Straits of 
                         Magallanes.",
             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 (aph(440)), non-pigmented 
                         particles, NPP (aNPP(440)), and chromophoric dissolved organic 
                         matter, CDOM (ay(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-2d-1) while the eastern sector received higher irradiance (~28 
                         mol quanta m-2d-1). In the Patagonian Shelf total absorption was 
                         dominated by phytoplankton (up to 76%; aph(440)=0.265 m-1), while 
                         in the Atlantic Sector of the Straits, the major contributor was 
                         NPP (up to 42%; aNPP(440)=0.138 m-1), and in the Pacific Sector of 
                         the Straits CDOM contributed up to 80% of the total absorption 
                         (ay(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 (ay(440) vs salinity rs=-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.",
                  doi = "10.1016/j.csr.2016.03.008",
                  url = "http://dx.doi.org/10.1016/j.csr.2016.03.008",
                 issn = "0278-4343",
             language = "en",
           targetfile = "lutz_bio.pdf",
        urlaccessdate = "27 abr. 2024"
}