Microphytoplankton composition, chlorophyll-a concentration and environmental variables of the Maranhão Continental Shelf, Northern Brazil

The distribution of phytoplankton in a coastal gradient located in the pelagic area of the Maranhão continental shelf was analyzed. Samples were collected in six bimonthly campaigns with seven sampling stations from November 2013 to September 2014. Simultaneously, environmental parameters were obtai...

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Autores principales:	Carvalho,Ronnessa C.Q, Cutrim,Marco V.J, Eschrique,Samara A, Azevedo-Cutrim,Andrea C.G, Moreira,Evaldeni G, Silveira,Paula C.A, Coelho,Juliana M
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2016
Materias:	phytoplankton distribution seasonal cycle algal biomass chlorophyll-a northern Brazil
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2016000200007
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spelling	oai:scielo:S0718-560X20160002000072016-07-06Microphytoplankton composition, chlorophyll-a concentration and environmental variables of the Maranhão Continental Shelf, Northern BrazilCarvalho,Ronnessa C.QCutrim,Marco V.JEschrique,Samara AAzevedo-Cutrim,Andrea C.GMoreira,Evaldeni GSilveira,Paula C.ACoelho,Juliana M phytoplankton distribution seasonal cycle algal biomass chlorophyll-a northern Brazil The distribution of phytoplankton in a coastal gradient located in the pelagic area of the Maranhão continental shelf was analyzed. Samples were collected in six bimonthly campaigns with seven sampling stations from November 2013 to September 2014. Simultaneously, environmental parameters were obtained, such as rainfall, salinity, conductivity, pH, dissolved oxygen, suspended particulate matter (SPM), water temperature, water transparency, nitrite, phosphate and silicate concentrations. The values of SPM showed a decreasing profile toward the ocean. The nutrients showed a clear seasonal cycle. The pH maintained alkaline during all the study period. There was an increase in electrical conductivity in direction of the ocean, the same pattern was observed for salinity. Chlorophyll-a concentration presented the highest values during the dry season and the lowest in the rainy one. The total chlorophyll-a also showed a decreasing profile toward the ocean in both dry and rainy season and was very low if compared with other studies in northern Brazil. The scenario observed in this study showed a clear seasonal cycle, with the highest contribution of the phytoplankton in the dry period; also it was observed the predominance of the Bacillariophyta division over the other identified divisions found, based on the obtained qualitative data.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.44 n.2 20162016-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2016000200007en10.3856/vol44-issue2-fulltext-7
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	phytoplankton distribution seasonal cycle algal biomass chlorophyll-a northern Brazil
spellingShingle	phytoplankton distribution seasonal cycle algal biomass chlorophyll-a northern Brazil Carvalho,Ronnessa C.Q Cutrim,Marco V.J Eschrique,Samara A Azevedo-Cutrim,Andrea C.G Moreira,Evaldeni G Silveira,Paula C.A Coelho,Juliana M Microphytoplankton composition, chlorophyll-a concentration and environmental variables of the Maranhão Continental Shelf, Northern Brazil
description	The distribution of phytoplankton in a coastal gradient located in the pelagic area of the Maranhão continental shelf was analyzed. Samples were collected in six bimonthly campaigns with seven sampling stations from November 2013 to September 2014. Simultaneously, environmental parameters were obtained, such as rainfall, salinity, conductivity, pH, dissolved oxygen, suspended particulate matter (SPM), water temperature, water transparency, nitrite, phosphate and silicate concentrations. The values of SPM showed a decreasing profile toward the ocean. The nutrients showed a clear seasonal cycle. The pH maintained alkaline during all the study period. There was an increase in electrical conductivity in direction of the ocean, the same pattern was observed for salinity. Chlorophyll-a concentration presented the highest values during the dry season and the lowest in the rainy one. The total chlorophyll-a also showed a decreasing profile toward the ocean in both dry and rainy season and was very low if compared with other studies in northern Brazil. The scenario observed in this study showed a clear seasonal cycle, with the highest contribution of the phytoplankton in the dry period; also it was observed the predominance of the Bacillariophyta division over the other identified divisions found, based on the obtained qualitative data.
author	Carvalho,Ronnessa C.Q Cutrim,Marco V.J Eschrique,Samara A Azevedo-Cutrim,Andrea C.G Moreira,Evaldeni G Silveira,Paula C.A Coelho,Juliana M
author_facet	Carvalho,Ronnessa C.Q Cutrim,Marco V.J Eschrique,Samara A Azevedo-Cutrim,Andrea C.G Moreira,Evaldeni G Silveira,Paula C.A Coelho,Juliana M
author_sort	Carvalho,Ronnessa C.Q
title	Microphytoplankton composition, chlorophyll-a concentration and environmental variables of the Maranhão Continental Shelf, Northern Brazil
title_short	Microphytoplankton composition, chlorophyll-a concentration and environmental variables of the Maranhão Continental Shelf, Northern Brazil
title_full	Microphytoplankton composition, chlorophyll-a concentration and environmental variables of the Maranhão Continental Shelf, Northern Brazil
title_fullStr	Microphytoplankton composition, chlorophyll-a concentration and environmental variables of the Maranhão Continental Shelf, Northern Brazil
title_full_unstemmed	Microphytoplankton composition, chlorophyll-a concentration and environmental variables of the Maranhão Continental Shelf, Northern Brazil
title_sort	microphytoplankton composition, chlorophyll-a concentration and environmental variables of the maranhão continental shelf, northern brazil
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2016000200007
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Microphytoplankton composition, chlorophyll-a concentration and environmental variables of the Maranhão Continental Shelf, Northern Brazil

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