Patterns of phytoplankton structure in response to environmental gradients in a macrotidal estuary of the Equatorial Margin (Atlantic coast, Brazil)

Cavalcanti, Lisana Furtado; Cutrim, Marco Valério Jansen; Lourenço, Caio Brito; Sá, Ana Karoline D.S.; Oliveira, Amanda Lorena Lima; Azevedo-Cutrim, Andrea Christina Gomes de

doi:10.1016/j.ecss.2020.106969

Cited by 19 publications

(5 citation statements)

References 65 publications

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“…Nitrophilous diatoms, particularly the overwhelmingly dominant genera Skeletonema, Thalassiosira and Thalassionema, were present throughout the year due to their greater tolerance to environmental variability, including low salinity and abundant nutrients (Figures 2 and 6). This finding is consistent with previous studies by Philippart et al, 2000;Shou and Zeng, 2015;Chen et al, 2017;Jiang et al, 2019a;Cavalcanti et al, 2020;and Song et al, 2022. The most dominant eurythermal species, Skeletonema spp., shows a high level of dominance in the coastal waters of the East China Sea, particularly in areas such as the Changjiang estuary (Jiang et al, 2014) and Hangzhou Bay (Zhang et al, 2015).…”

Section: Phytoplankton Community Shift In the Smbsupporting

confidence: 93%

“…However, the highest abundance and species richness were found in summer accordingly (Figure 4). A previous study in the Atlantic coast of the Brazil, which had lower nutrient loads but greater light availability, also suggested a stimulated phytoplankton abundance (Cavalcanti et al, 2020). In autumn, the Zhemin Coast Current, characterized by low salinity and high nutrient content, exerted control over the system (Zhu et al, 2012;Jiang et al, 2014).…”

Section: Phytoplankton Community Shift In the Smbmentioning

confidence: 79%

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Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

Wang,

Huang

et al. 2023

Front. Mar. Sci.

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In the context of global change, the stressors of warming and eutrophication have significant ecological implications in coastal waters. In order to examine the diversity of phytoplankton and its relationship with water quality, we conducted a survey of phytoplankton community compositions and their correlation with environmental changes over four seasons in a eutrophic bay located in the East China Sea. Through a systematic analysis, we identified diatoms and dinoflagellates as the primary dominant groups, with the species Skeletonema costatum, Skeletonema marinoi, Biddulphia sinensis, Thalassiosira eccentrica, Leptocylindrus danicus, Coscinodiscus oculus-iridis, Coscinodiscus jonesianus, and Chaetoceros knipowitschi as the most abundant species in all seasons. Significant seasonal alterations were observed in both environmental settings and phytoplankton species richness, dominance, and abundance. The phytoplankton community varied in its response to diverse aquatic environments and was principally affected by temperature, silicic acid concentrations, and suspended solids. Elevated temperatures were found to promote an increase in phytoplankton abundance. However, no clear evidence of diatom and dinoflagellate succession in relation to N:P ratio was observed across seasons. Water quality analysis illustrated that the majority of the study area exhibited a mid-eutrophic with severe organic pollution. The abundance of phytoplankton was significantly influenced by eutrophication and organic pollution. The accelerated warming process related to coastal nuclear power plants and nutrient regime alterations significantly affect the temporal shift of the phytoplankton community. These findings contribute valuable insights into the effects of eutrophic environments on the structure of phytoplankton communities in coastal aquatic systems.

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Section: Phytoplankton Community Shift In the Smbsupporting

confidence: 93%

Section: Phytoplankton Community Shift In the Smbmentioning

confidence: 79%

Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

Wang,

Huang

et al. 2023

Front. Mar. Sci.

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“…This leads to a decrease of phytoplankton development before being ushed out of the estuary during the rainy season. The seasonal variation in phytoplankton abundance in the Saigon River has also been found in other tropical estuaries such as Bach Dang Estuary (Vietnam) (van Chu et al 2014), Red River (Vietnam) (Duong et al 2019) and Paciencia River Estuary (Brazil) (Cavalcanti et al 2020). During the dry season, L. danicus and A. granulata were dominant in upstream of HCMC (SG01), while the freshwater algae Peridinium was dominant there in rainy season.…”

Section: Spatial Effect On Phytoplankton Communitiesmentioning

confidence: 59%

Phytoplankton characterization in a tropical tidal river impacted by a megacity: the case of the Saigon River (Southern Vietnam)

Nguyen

Dao

Strady

et al. 2021

Environ Sci Pollut Res

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The spatiotemporal variation of phytoplankton and their relationship with environmental variables were analysed in the Saigon River -a tropical river in Southern Vietnam. Two longitudinal pro les were conducted during dry and rainy season at 18 sampling sites covering more than 60 km long in the river.Besides, a bi-weekly monitoring conducted upstream, urban area (Ho Chi Minh City -HCMC) and downstream of Saigon River was organized from December 2016 to November 2017. The major phytoplankton were diatoms (e.g. Cyclotella cf. meneghiniana, Leptocylindrus danicus, Aulacoseira granulata), cyanobacteria (Microcystis spp., Raphidiopsis raciborskii, Pseudanabaena sp) and euglenoids (Trachelomonas volvocina). Commonly freshwater phytoplankton species and sometimes brackish water species were dominant during the monitoring. Phytoplankton abundances in dry season were much higher than in rainy season (> 100 times) which was explained by a shorter riverine water residence time and higher ushing capacity during the dry season. There was a clear separation of phytoplankton abundance between the urban area and the remaining area of Saigon River because of polluted urban emissions of HCMC. Redundancy analysis shows that the environmental variables (TOC, Nitrogen, pH, salinity, Mo, Mn) were the driving factors related to the dominance of L. danicus and Cyclotella cf. meneghiniana in the upstream river and urban section of Saigon River. The dominance of cyanobacterium Microcystis spp in the downstream of Saigon River was related to higher salinity, Mg, Cu concentrations and lower concentrations of nutrients, Mn, Co, Mo. The dominance of potentially toxic cyanobacteria in Saigon River possess health risk to local residents especially upon the increasing temperature context and nutrient loading into the river in the next decades.

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“…The low silicate concentrations found in the dry season are associated with the reduced capacity to transport terrigenous material to the water column as well as the reduction in the transport of domestic and industrial effluents. Cavalcanti et al (2020) found silicate concentrations ranging from 0.95 to 3.61 µmol L -1 in the estuary of the Paciência River in São Luís, Maranhão.…”

Section: Physical and Chemical Characterizationmentioning

confidence: 94%

Distribution of physical and chemical variables in the water column and characterization of the bottom sediment in a macrotidal estuary on the Amazon coast of the state of Maranhão, Brazil

Machado¹,

Eschrique²,

Lima³

et al. 2022

Rev. ambiente água

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The objective of this research was to characterize the distribution of dissolved nutrients at six sampling stations in the estuary of the Anil River (ARE) and characterize the bottom sediment. The study area is influenced by a tropical climate and semidiurnal macrotidal regime. Sampling of the surface water and sediment was performed in the main channel at six sampling stations distributed along the estuary in the rainy period (May 9th) and dry period (October 5th) during the spring. Physical variables were collected with the aid of a HANNA HI-8424 multi-parameter probe (water temperature, salinity, pH, dissolved oxygen, and turbidity) and YSI CTD (conductivity, temperature, and depth) probe. A van Veen dredge was used for the collection of bottom sediment from the main channel. The sedimentological results were heterogeneous. Grain size ranged from very fine to medium sand. Dissolved nutrients in the ARE had different sources depending on the season. Continental and fluvial inputs, evidenced by salinity values, governed the distribution of nutrients in the rainy period (January to June), whereas nutrient concentrations were related to the recycling of organic material in the estuary in the dry season (July to December). The considerable presence of sand in the main channel indicates that the sediments available in ARE are exposed to intense hydrodynamics. The distribution of nutrients and the grain size revealed the occurrence of different sources in the estuary according to the rainfall regime and the intense hydrodynamics of tidal currents (semidiurnal macrotidal). Keywords: dissolved nutrients, estuarine environment, sedimentology.

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Patterns of phytoplankton structure in response to environmental gradients in a macrotidal estuary of the Equatorial Margin (Atlantic coast, Brazil)

Cited by 19 publications

References 65 publications

Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

Phytoplankton characterization in a tropical tidal river impacted by a megacity: the case of the Saigon River (Southern Vietnam)

Distribution of physical and chemical variables in the water column and characterization of the bottom sediment in a macrotidal estuary on the Amazon coast of the state of Maranhão, Brazil

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