@Article{Gonçalves-AraujoSoTaMeSoScPo:2018:PhPrAs,
               author = "Gon{\c{c}}alves-Araujo, Rafael and Souza, M{\'a}rcio Silva de 
                         and Tavano, Virginia Maria and Mendes, Carlos Rafael and Souza, 
                         Ronald Buss de and Schultz, Cristina and Pollery, Ricardo Cesar",
          affiliation = "{Alfred Wegener Institute Helmholtz Centre for Polar and Marine 
                         Research (AWI)} and {Universidade Federal do Rio Grande (FURG)} 
                         and {Universidade Federal do Rio Grande (FURG)} and {Universidade 
                         Federal do Rio Grande (FURG)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Woods Hole Oceanographic Institution 
                         (WHOI)} and {Universidade Federal do Rio de Janeiro (UFRJ)}",
                title = "Phyto- and protozooplankton assemblages and hydrographic 
                         variability during an early winter survey in the Southern 
                         Brazilian Continental Shelf",
              journal = "Journal of Marine Systems",
                 year = "2018",
               volume = "184",
                pages = "36--49",
             keywords = "Brazilian Coastal Current, south Brazilian continental shelf, 
                         phytoplancton.",
             abstract = "The distribution of phytoplankton and protozooplankton assemblages 
                         in relation to hydrographic variability across the southern 
                         Brazilian continental shelf were studied based on data collected 
                         during early winter (June/ 2012), complemented with MODIS-Aqua 
                         satellite imagery. The in situ data set was comprised by water 
                         column structure properties, dissolved inorganic nutrients 
                         (ammonium, nitrite, nitrate, phosphate and silicate), 
                         phytoplankton and protozooplankton composition and biomass 
                         [chlorophyll a (Chl a) concentration and carbon content]. 
                         Phytoplankton assemblages were assessed by both microscopy and 
                         HPLC-CHEMTAX approaches. A canonical correspondence analysis 
                         associating physical, chemical and phytoplankton composition data 
                         at surface revealed a tight coupling between the phytoplankton 
                         community and hydrographic conditions, with strong environmental 
                         gradients across three different domains: the pelagic, outer shelf 
                         Tropical Water (TW); the mid shelf domain under influence of 
                         Subtropical Shelf Water (STSW); and the inner shelf domain, mainly 
                         under influence of riverine outflow of the La Plata River Plume 
                         Water (PPW). Results showed that diatoms dominated the 
                         phytoplankton assemblages throughout the study region, but other 
                         groups were also important and varied according to the different 
                         water masses at surface. The low salinity and nutrient-rich PPW 
                         stimulated a high phytoplankton biomass and diversity of diatoms 
                         and dinoflagellates within the inner shelf region, with enhanced 
                         Chl a levels (> 1.3 mg m\−3 ) and a great abundance of 
                         large and medium-sized diatoms (some of these appeared exclusively 
                         in PPW), as well as ciliates, dinoflagellates, raphidophyceans and 
                         cryptophytes. Conversely, smaller diatoms (e.g. Rhizosolenia 
                         clevei), picoplanktonic species (prochlorophytes and 
                         cyanobacteria) and a noticeable contribution of dinoflagellates 
                         and other flagellates, associated with lower Chl a levels (< 0.93 
                         mg m\−3 ), characterized the TW domain, where low nutrient 
                         concentrations and deep upper mixed layers were found. The 
                         transitional mid shelf domain showed intermediate levels of both 
                         nutrients and Chl a (ranging 1.061.59 mg m\−3 ), and 
                         phytoplankton showed a diversity of diatoms and dinoflagellates 
                         similar to PPW, and was mainly composed by those two groups. 
                         Considerably diverse and abundant phytoplankton communities were 
                         observed in early winter at that section of the southwestern 
                         Atlantic Ocean, particularly in areas under fresh water influence. 
                         In addition, the observed biomass levels of protozooplankton 
                         suggest their important role on top-down control processes in the 
                         region.",
                  doi = "10.1016/j.jmarsys.2018.04.005",
                  url = "http://dx.doi.org/10.1016/j.jmarsys.2018.04.005",
                 issn = "0924-7963 and 1879-1573",
                label = "lattes: 0537824080913130 5 
                         Gon{\c{c}}alves-AraujoSoTaMeSoScPo:2018:PhPrAs",
             language = "en",
           targetfile = "goncalves_phyto.pdf",
        urlaccessdate = "27 abr. 2024"
}