14
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      The phytoplankton biodiversity of the coast of the state of São Paulo, Brazil Translated title: A biodiversidade do fitoplâncton do litoral do estado de São Paulo, Brasil

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The objective of this study is to compile the inventory of nearly 100 years of research about the phytoplankton species cited for the coast of the state of São Paulo, Brazil. A state-of-the-art study on the local biodiversity has long been needed to provide a baseline for future comparisons. This type of data is scattered in old scientific journals and in the so-called "grey literature", and are in need of nomenclature updating. Twenty-six publications are considered. The earliest sampling record is from 1913 (?) and the most recent from 2002. This checklist compiled from the literature was complemented with primary data collected between August 2004 and July 2006, recent surveys of the surf-zone of 20 beaches located along the coast and of a mariculture farm at the Cocanha Beach, Caraguatatuba. The complete species list includes 572 taxa: most are diatoms (82%), seconded by dinoflagellates (16%), with a minor contribution of silicoflagellates, coccolithophorids, ebriideans and cyanobacteria. The most investigated areas were: Ubatuba, São Sebastião, Santos and Cananéia. The recent surveys have a broader spatial coverage. The objectives of the studies have changed over the years from purely taxonomic to process-oriented investigations. Therefore, the longest species lists and most first records for the area were published before the 1980's and later publications, even those in which cell counts were performed, mention only the most abundant/frequent species. Electron microscopy was used for the first time in the present surveys, and new records include 38 diatoms, 42 dinoflagellates, 1 silicoflagellate, 1 ebriidean and 2 cyanobacteria. The use and interpretation of this species list require the perception of some constraints. It is not our role to question the identification made by other researchers. On the other hand, the ability to sample, analyze and identify species has evolved over the years and some considerations in this regard are presented.

          Translated abstract

          O objetivo deste estudo é compilar o inventário de quase 100 anos de pesquisa sobre a composição de espécies do fitoplâncton do litoral do Estado de São Paulo, Brasil. O retrato atualizado da biodiversidade local é necessário para establecer um dignóstico para comparações futuras. Este tipo de informação encontra-se dispersa em antigas publicações e em material considerado como "literatura cinza" e requer atualização nomenclatural. Vinte e seis publicações foram consideradas neste estudo. O registro mais antigo é de 1913 (?) e o mais recente de 2002. Esta lista de espécies, compilada a partir de dados pretéritos, foi complementada com dados primários coletados entre agosto de 2004 e julho de 2006 nas zonas de arrebentação de 20 praias paulistas e em área de maricultura da praia da Cocanha em Caraguatatuba. A lista de espécies completa inclui 572 táxons: a maioria de diatomáceas (82%), seguidas por dinoflagelados (16%), com uma pequena contribuição de silicoflagelados, cocolitoforídeos, ebriideas e cianobactérias. As áreas mais estudadas foram: Ubatuba, São Sebastião, Santos e Cananéia. O levantamento atual tem uma cobertura espacial mais abrangente. Ao longo dos anos, os objetivos dos estudos pretéritos variaram desde puramente taxonômicos até investigações de aspectos funcionais do ecossistema. Desta forma, os inventários mais longos e a maioria dos primeiros registros foram publicados antes de 1980 e as publicações mais recentes fazem menção apenas a espécies mais abundantes/freqüentes. Microscopia eletrônica foi empregada pela primeira vez no levantamento atual e novos registros incluem 38 diatomáceas, 42 dinoflagelados, 1 silicoflagelado, 1 ebriidea e 2 cianobactérias. O uso e interpretação deste inventário exige cautela. Se por um lado, não é viável questionar a identificação feita por outros pesquisadores, por outro lado, a capacidade de amostrar, analisar e identificar espécies evoluiu ao longo do tempo. Algumas considerações sobre esta questão são apresentadas.

          Related collections

          Most cited references 56

          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          The shelf and coastal waters off southern Brazil

          The data collected on three oceanographic cruises undertaken in 1956 indicate that the main branch of the Brazil Current flows southwards along the continental slope, where it reaches maximum velocity, and further, that a well defined limit is found between the warm and saline tropical water from the north and that situated over the central part of the shelf. This is especially the case during the summer months (October-March). Below the Brazil Current a water layer of lower salinity and temperature is found. This water mass is formed near the western extremity of the Subtropical Convergence where it sinks and flows northwards to reappear near or at the surface in an area situated between the lighter, south-flowing, tropical water, and the coastal water. Such a distribution of density across the Current is to be expected in view of the dynamics of ocean currents. There are, however, evidences which indicate the occurrence of upwelling from moderate depths, in particular near Cabo Frio where the prevailing winds from NE drive the surface waters offshore. It is further suggested that the upwelling is maintained by a thermohaline mechanism as the density of the cold and low salinity water is decreased by heating from solar radiation. In order to maintain dynamic stability, the heated water must consequently flow out of the area and be replaced by water from below which in turn suffers the same decrease of density, and so on. Such mechanism might, together with prevailing winds, be responsible for permanent or periodic upwelling near other regions in the tropical and subtropical zone of the oceans where salinity decreases with depth.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Contribuição ao estudo da estrutura oceanográfica da região sudeste entre Cabo Frio (RJ) e Cabo de Santa Marta Grande (SC)

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              AlgaeBase. World-wide electronic publication

                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                bn
                Biota Neotropica
                Biota Neotrop.
                Instituto Virtual da Biodiversidade | BIOTA - FAPESP (Campinas )
                1676-0611
                September 2008
                : 8
                : 3
                : 0
                Affiliations
                [1 ] Universidade de Taubaté Brazil
                Article
                S1676-06032008000300015
                10.1590/S1676-06032008000300015
                Product
                Product Information: website
                Categories
                BIODIVERSITY CONSERVATION

                Comments

                Comment on this article