@Article{ConceiçãoAffeSilvNune:2021:SpVaPh,
               author = "Concei{\c{c}}{\~a}o, Lorena Pedreira and Affe, Helen Michelle de 
                         Jesus and Silva, Daniela Mariano Lopes da and Nunes, Jos{\'e} 
                         Marcos de Castro",
          affiliation = "{Universidade Estadual de Feira de Santana (UEFS)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Estadual 
                         de Santa Cruz} and {Universidade Federal da Bahia (UFBA)}",
                title = "Spatio-temporal variation of the phytoplankton community in a 
                         tropical estuarine gradient, under the influence of river 
                         damming",
              journal = "Regional Studies in Marine Science",
                 year = "2021",
               volume = "43",
                pages = "e101642",
                month = "Mar.",
             abstract = "The Paragua{\c{c}}u River is one of the most important rivers in 
                         Bahia State, Brazil, and the main tributary of the Todos os Santos 
                         Bay, the second largest in that country. We evaluated the 
                         spatio-temporal variations in the composition and structure of the 
                         phytoplankton community in the Paragua{\c{c}}u River estuary as 
                         influenced by rainfall and fluvial discharge from the Pedra do 
                         Cavalo dam. Bi-monthly collections were carried out from May 2018 
                         to March 2019 at 12 sampling stations in the estuary. During this 
                         period, phytoplankton samples, water samples to determinate the 
                         concentration of dissolved inorganic nutrients and data on 
                         salinity, temperature, pH, dissolved oxygen, and water 
                         transparency were collected. Data on rainfall and dam discharge 
                         were also obtained. Abiotic variables and chlorophyll-a showed 
                         significant differences in the estuary zones, and silicate 
                         concentrations demonstrated differences between the dam discharge 
                         periods. A total of 194 phytoplankton taxa were identified, with 
                         diatoms showing the highest densities and diversities throughout 
                         the study period. Cyclotella meneghiniana, Nitzschia sp., and 
                         Scrippsiella acuminata formed blooms in the dry season, whereas 
                         blooms of Planktothrix isothrix occurred in the rainy season and 
                         during a period of medium dam discharge in the dry season. The 
                         influence of dam discharge was quite evident, with increases in 
                         nutrient concentrations in the estuary during the months of higher 
                         flow that altered the composition and density of the phytoplankton 
                         communities in the different system zones. The formation of blooms 
                         in response to increased nutrient availability represents an 
                         increase in the primary productivity of the system, although 
                         blooms of potentially harmful species (such as Planktothrix 
                         isothrix) may represent a risk to human activities in the 
                         region.",
                  doi = "10.1016/j.rsma.2021.101642",
                  url = "http://dx.doi.org/10.1016/j.rsma.2021.101642",
                 issn = "2352-4855",
             language = "en",
           targetfile = "conceicao_spatio.pdf",
        urlaccessdate = "09 maio 2024"
}