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| Siqueira,Adriana; Godinho,Mirna Januária Leal; Kolm,Hedda Elisabeth; Machado,Eunice da Costa. |
| The aim of this wat was to evaluate the water quality in four tidal creeks of Paraná, Brazil, with different anthropic influences. Samples were collected every three months. Temperature, salinity, pH, alkalinity, total CO2, dissolved O2, nitrite, nitrate, N-ammoniacal, phosphate, silicate, particulate suspended matter, humic matter, total chlorophyll, total and fecal coliform bacteria of surface water were measured in each sample and compared. For all the stations water temperature was lower in winter, but ranged within typically subtropical values. Salinity (7 - 25) and pH (7.08 - 7.91) were higher in Perequê tidal creek indicating that only this tidal creek was strongly influenced by the nearby ocean waters. Lower dissolved O2, reaching anoxic levels... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tidal creek; Eutrophication; Coast of Paraná. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200028 |
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| Siqueira,Adriana; Kolm,Hedda Elisabeth; Brandini,Frederico Pereira. |
| Studies were carried out on Thrichodesmium erythraeum occurring on the inner shelf in the state of Paraná, Brazil. Temperature, salinity, rainfall, wind velocity, total bacteria, bacterial biomass, chlorophyll-a, phytoplankton, Anabaena sp., Merismopedia sp. and T. erythraeum densities were measured in surface water. Centric and pennate diatoms, Anabaena sp. and Merismopedia sp. were most abundant at 15 m isobath, while dinoflagellate abundance was relatively constant among stations. Similarly, total bacterial densities were relatively homogeneous throughout the sampling area, suggesting that blooms of T. erythraeum were not yet in the senescent phase. Results showed that T. erythraeum was capable of surviving in relatively inhospitable environmental... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trichodesmium erythraeum; Bloom; Cyanobacteria; Phytoplankton; South Brazil. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300018 |
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| Ribeiro,Catherine Gérikas; Steffens,Maria Berenice Reynaud; Etto,Rafael Mazer; Galvão,Carolina Weigert; Martins,César de Castro; Pedrosa,Fábio de Oliveira; Kolm,Hedda Elisabeth. |
| The mangrove's sediments from the coastal areas under human activities may contain significant contaminations by hydrocarbons, even when there are no visual evidences of it. The microorganisms are essential to these ecosystems, especially in the control of their chemical environment. Sediment samples were collected in two regions under different environment conditions (pristine and contaminated) of the Paranaguá Estuarine Complex (Paranaguá Bay and Laranjeiras Bay), Brazil. Aliphatic hydrocarbons were determined by the GC-FID to assess the status of contamination of the studied areas. The total DNA was extracted from these samples. The 16S rRNA gene was amplified by the PCR reactions with the pair of primers 21F and 958R for the archaeal domain, and 27F... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Mangroves; Archaea; Bacteria; 16S rRNA; ARDRA; Aliphatic hydrocarbons. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200013 |
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| Kolm,Hedda Elisabeth; Schoenenberger,Maria Fernanda; Piemonte,Mariana da Rocha; Souza,Patrícia S. de A.; Scühli,Guilherme Schnell e; Mucciatto,Mariele B.; Mazzuco,Roseli. |
| Spatial variability in the concentration of total bacteria, saprophytes and coliforms abundance was investigated in surface waters of Paranaguá and Antonina Bays. Six points along a profile from the entrance of Paranaguá Bay to the innermost part of Antonina Bay, were sampled on February 26, 1997. Temperature, salinity, dissolved oxygen, pH, particulate organic carbon, water transparency and seston were also measured. Determination of total bacterial abundance and biomass were made with the epifluorescent method. Saprophytic bacteria counts were conducted with ZoBell 2216E culture medium with fresh and 32 water and the coliform MPN was enumerated with the chromogenic substrate method. Principal component analysis of biotic and abiotic data showed a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Hydrographic variables; Estuary; Paranaguá and Antonina Bays. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000100005 |
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| Ribeiro,Catherine Gérikas; Kolm,Hedda Elisabeth; Costa Machado,Eunice da. |
| In this work, the density of bacterioplankton, bacterial biomass and environmental variables were monitored in two seasons (summer and winter), two times each month (spring tide and neap tide sampling), over a 12 h period, comprising a tidal cycle (semidiurnal), from subsurface and bottom waters, in a fixed station in the Estuarine Turbidity Maximum Zone (ETMZ) of Paranaguá Bay, Brazil. The data were treated with multivariate analyses methods in order to indentify the key controlling factors of the bacterial community dynamics. The microbial community seemed to be structured by a close relationship with the nutrients concentration, mainly by total phosphorous and nitrate. Regardless of variations throughout the tidal cycles, free-living bacteria had a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacterioplankton; Estuarine Turbidity Maximum Zone; Free-living bacteria; Attached bacteria; Paranaguá Bay. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000500012 |
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| Forcelini,Helenita Catharina Dalla-Lana; Kolm,Hedda Elisabeth; Absher,Theresinha Monteiro. |
| The present work aimed to evaluate the contamination of Escherichia coli in the surface waters and oysters from two cultivations of Guaratuba Bay and to analyze the correlation patterns among the concentrations of E. coli in the waters and in the oysters with the local physical-chemical parameters. Samples were collected in the spring of 2007 and summer, autumn and winter of 2008 from two points of the bay (internal point and external point). From each cultivation and sampling period, 18 oysters were collected. The samples of surface water were collected for the measurement of physical-chemical parameters (pH, salinity, temperature, dissolved oxygen, seston, particulate organic matter) and quantification of E. coli. The surface water analyzed in the summer... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oysters; Escherichia coli; Guaratuba Bay. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200018 |
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| Kolm,Hedda Elisabeth; Andretta,Lucimar. |
| The influence of tidal phase on bacteria abundance in surface waters was studied in five stations along the Perequê tidal creek (Paraná State, Brazil), at spring and neap low and high tides in July 1999. The stations were located from the mouth (St.1) to the creek's head (St. 5). The following parameters were analyzed: salinity, temperature, pH, dissolved oxygen, total carbon dioxide, seston, particulate organic matter, pluviosity, chlorophyll "a", total heterotrophic bacteria, bacterial biomass, cultivable heterotrophic aerobic halophilic and halophobic bacteria, total coliforms and Escherichia coli. The results showed that the highest values of salinity, pH and dissolved oxygen at stations 1 to 4 were registered during the spring high tide. The amount of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Tide; Tidal creek; Perequê; Paraná State. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000200002 |
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