Structure and temporal variation of the phytoplankton of a macrotidal beach from the Amazon coastal zone

Matos, Jislene Brito; Oliveira, Suellen Mara Oliveira de; Pereira, Luci Cajueiro Carneiro; Costa, Rauquı́rio Marinho da

doi:10.1590/0001-3765201620150688

Cited by 15 publications

(7 citation statements)

References 49 publications

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“…The variation of dissolved oxygen obtained in the bay are common to marine systems of Maranhense coast in natural conditions (Azevedo et al, 2008;Rodrigues and Cutrim, 2010). It may be explained by the tidal regime (macrotides) and consequently high local hydrodynamic that combined can accentuate the ocean-atmosphere interface and the oxygenation of the water (Monteiro et al, 2009;Matos et al, 2016). Furthermore, precipitation influences the fluctuations in the oxygen dissolved, because can lead to the increase of dead organic matter decreasing its concentration during the oxidation process (Kress et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

Structure of microphytoplankton community and environmental variables in a macrotidal estuarine complex, São Marcos Bay, Maranhão - Brazil

et al. 2018

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Cavalcanti et al.: Microphytoplankton of a macrotidal estuarine complex 283 Structure of microphytoplankton community and environmental variables in a macrotidal estuarine complex, São Marcos Bay, Maranhão -BrazilSão Marcos Bay is an estuarine complex with semidiurnal tides that can reach more than 7 m during equinoctial spring tides. It is situated in the second largest Brazilian coastline and is subjected to continuous human activities holding an important port complex of Latin America. In order to contribute to the knowledge about the structure of the phytoplankton in a macrotidal systems, this study aims to evaluate the phytoplankton community and its relationship with environmental conditions in the São Marcos Bay. Five surveys in 2010 and 2011 were carried out on four sampling points during the rainy and dry seasons. Samples were taken during the flood and ebb phases at neap tides. Hydrological parameters were correlated with biological data (phytoplankton composition, abundance and biomass) using statistical analysis. The phytoplankton biomass (chlorophyll a) characterized the bay as quite productive (10.43±7.62 mg m -3 ) with the nanophytoplankton as the dominant fraction. Seasonal variation was observed in phytoplankton abundance with higher values (34,262±18,422 cells L -1 ) in the rainy season. Diatoms were the most important phytoplankton group, pointing out Nitzschia sp., Diploneis weissflogii and Synedra sp. as the dominant species. This study revealed that the composition of phytoplankton community was mainly influenced by the local dynamics, governed by macrotides, and precipitation regime that mostly contributed to the seasonal fluctuations of the environmental conditions, such as salinity, dissolved oxygen, and nutrients.

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Section: Discussionmentioning

confidence: 99%

Structure of microphytoplankton community and environmental variables in a macrotidal estuarine complex, São Marcos Bay, Maranhão - Brazil

et al. 2018

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“…These abiotic forcing factors cause the change of biotic conditions and of species-species interactions [6]. Despite the variety of the characteristics of estuarine and coastal systems worldwide, the increase in the runoff often favors the growth of phytoflagellates, contrary to the prevalence of diatoms in more stable estuarine conditions [5,8,10]. This feature causes the phytoplankton community structure to be connected to the precipitation regime in the drainage basin surrounding the coastal zones.…”

Section: Freshwater Influencementioning

confidence: 99%

“…Phytoplankters play an essential role in global cycles of the main biogenic elements, as they are the most important primary producers in aquatic ecosystems. Their communities are in continual adjustment responding to the disturbances induced in marine systems by anthropogenic activities and climate changes [1][2][3][4][5][6]. Therefore, phytoplankton is recognized as an important indicator of environmental changes, in particular in the coastal zones, where the interactions between atmospheric, terrestrial and marine drivers are more dynamic [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Climatic and Anthropogenic Impacts on Environmental Conditions and Phytoplankton Community in the Gulf of Trieste (Northern Adriatic Sea)

Cozzi

Cabrini

Kralj

et al. 2020

Water

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During the last century, human activities have exerted an increasing pressure on coastal ecosystems, primarily inducing their eutrophication, with a more recent partial mitigation of this phenomenon where improvements of environmental management practices were adopted. However, a reanalysis of the pressures on coastal zones and surrounding drainage basins is needed because of the alterations induced nowadays by the climate changes. A comparative analysis of long-term oceanographic and environmental data series (1986–2018) was performed, in order to highlight the effects of anthropogenic and climatic disturbances on the phytoplankton community in the Gulf of Trieste (GoT). After the 1980s, the decline in phytoplankton abundance was matched to increasing periods of low runoff, an overall deficit of the precipitation and to a decrease in phosphate availability in the coastal waters (−0.003 µmol L−1 yr−1), even in the presence of large riverine inputs of nitrogen and silicates. This trend of oligotrophication was reversed in the 2010s by the beginning of a new and unexpected phase of climatic instability, which also caused changes of the composition and seasonal cycle of the phytoplankton community. Beyond the management of nutrient loads, it was shown that climatic drivers such as seawater warming, precipitation and wind regime affect both nutrient balance and phytoplankton community in this coastal zone.

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“…They have studied the structure and temporal variation of the phytoplankton of a beach in the Amazon Costal Zone in order to have a better understanding of the factors that influence these microscopic organisms (Matos et al 2016). This area encompasses several aquatic ecosystems (e.g., Souza Filho et al 2003), all subjected to complex hydrodynamic processes (e.g., Nittrouer and Demaster 1996).…”

mentioning

confidence: 99%

“…This area encompasses several aquatic ecosystems (e.g., Souza Filho et al 2003), all subjected to complex hydrodynamic processes (e.g., Nittrouer and Demaster 1996). Since microalgae constitute an important component of the freshwater community in the Amazon Region and part of the diet of several organisms (e.g., Gomes et al 2014), such detailed studies, as the one of Matos et al (2016), are welcome and constitute important steps for a better understanding of the dynamics that affect these organisms in this particular costal area of Brazil.…”

mentioning

confidence: 99%

Sugarcane and cancer, scientometrics, and phytoplankton dynamics of a beach in the Amazon

Kellner

2016

An. Acad. Bras. Ciênc.

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Structure and temporal variation of the phytoplankton of a macrotidal beach from the Amazon coastal zone

Cited by 15 publications

References 49 publications

Structure of microphytoplankton community and environmental variables in a macrotidal estuarine complex, São Marcos Bay, Maranhão - Brazil

Structure of microphytoplankton community and environmental variables in a macrotidal estuarine complex, São Marcos Bay, Maranhão - Brazil

Climatic and Anthropogenic Impacts on Environmental Conditions and Phytoplankton Community in the Gulf of Trieste (Northern Adriatic Sea)

Sugarcane and cancer, scientometrics, and phytoplankton dynamics of a beach in the Amazon

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