Algal blooms and trophic state in a tropical estuary blocked by a dam (northeastern Brazil)

Sá, Ana Karoline Duarte dos Santos; Cutrim, Marco Valério Jansen; Costa, Denise dos Santos; Cavalcanti, Lisana Furtado; Ferreira, Francinara Santos; Oliveira, Amanda Lorena Lima; Serejo, Jefferson Horlley Feitosa

doi:10.1590/2675-2824069.20-006akddss

Cited by 7 publications

(7 citation statements)

References 38 publications

(50 reference statements)

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“…TSI values showed that the sampling points within 3 km from the fish cage were eutrophic (3B, 2B, 1B, 0, 1A, 2A, 3A, Rokan, Telang). This indicated that the areas surrounding the fish cages at Temengor Reservoir are at a high risk of excessive phytoplankton growth, also known as algal blooms (Sá et al, 2021). Thus, these areas had a relatively higher level of productivity.…”

Section: Discussionmentioning

confidence: 99%

“…In a study at Bacanga River Estuary (BRE), Brazil, the hypereutrophic of TSI showed a significant relationship with several specific phytoplankton blooms, namely Skeletonema costatum, Protoperidinium sp., Euglena gracilis, Chlamydomonas sp. and Leptocylindrus danicus , critical indicator species of the trophic status (Sá et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…As Sá et al (2021) highlighted, TSI is the best tool to reflect the phytoplankton blooming phenomenon, therefore this monitoring tool could also be used for temporal analysis. Early alarms on the occurrence of algal blooms and rapid countermeasures are crucial in safeguarding the Temengor Reservoir.…”

Section: Trophic State Index (Tsi) Along a Distance Gradient From The...mentioning

confidence: 99%

“…The status of lake water is strongly related to the quantity and quality of waste discharge from the animal culture systems, such as phosphorus, nitrogen and other biological nutrients (Barak & Rijin, 2000; Buyukcapar & Alp, 2006; Neto et al, 2015; Sawestri et al, 2021). However, among these elements, phosphorus function is more significant than nitrogen in controlling eutrophication and productivity of the lake as this nutrient is usually a limiting factor for plant (algae and macrophyte) growth, as highlighted by Mhlanga et al (2013), Schindler et al (2016), Bueno et al (2017), Simanjuntak and Muhammad (2018), Lee et al (2019), Sá et al (2021) and Sheng et al (2021).…”

Section: Introductionmentioning

confidence: 99%

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Trophic state index ( TSI ) and carrying capacity estimation of aquaculture development; the application of total phosphorus budget

Hamid

Sah

Idris

et al. 2022

Aquaculture Research

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The aquaculture industry is crucial for sustainability and food security. Nevertheless, it is also one of the significant causes of water quality degradation, reducing water bodies' carrying capacity. One of the degradation factors is the improper discharge of phosphorus. This study aimed to evaluate the trophic state index (TSI) and carrying capacity for tilapia aquaculture development at the Temengor Reservoir, Malaysia, based on the Dillon–Rigler phosphorus budget model. The data permit the evaluation of the limit for fish production capacities that could retain acceptable water quality conditions. This study was carried out monthly from April 2014 to March 2015, focusing on cage sites within the Aquaculture Industrial Zone (AIZ). A total of 15 sampling points were established within a 5 km radius of the fish cages at 1 km horizontal intervals. The TSI values based on three indicators, total phosphorous, Secchi depth and chlorophyll‐a, showed a significant difference (p < 0.05) among sampling points. Areas in the vicinity of the fish cages (<3 km) were at a eutrophic state. However, the current aquaculture production at 9.13 × 103 tonnes per year, which comprises three fish cage modules, has not yet reached the optimum capacity of 325.23 × 103 tonnes per year. Although the lake could accommodate another 105 fish cages, the eutrophic state near the cages signalled water quality deterioration. As there is a plan to increase the number of cages, it is hoped that these findings will be taken into serious consideration in the implementation of any aquaculture expansion in this man‐made lake. [Correction added on 13 September 2022, after first online publication: study date range has been updated.]

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Trophic State Index (Tsi) Along a Distance Gradient From The...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Trophic state index ( TSI ) and carrying capacity estimation of aquaculture development; the application of total phosphorus budget

Hamid

Sah

Idris

et al. 2022

Aquaculture Research

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“…The TRIX index was originally used to assess the trophic status of the Adriatic Sea (Vollenweider et al, 1998). It has now been applied to several coastal ecosystems, including estuaries (e.g., Flores- Montes et al, 2011;Seisdedo et al, 2014;Vargas-Gonzáles et al, 2014;Sá et al, 2021;Silva et al, 2021). Here, this index was calculated according to the Vollenweider et al (1998) equation, based on Chl-a, DO%, DIN, and SRP values:…”

Section: Chemical Analyses and Trophic Status Assessmentmentioning

confidence: 99%

Assessment of the trophic status in a tropical estuarine system

et al. 2022

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Estuaries are extremely valuable ecosystems and have been affected by several anthropogenic activities from urban growth and industrial development, such as the release of untreated effluents which decrease water quality. This study aimed to evaluate the seasonal and temporal trophic status variation in the Formoso River Estuarine System (FRES), a tropical estuary. Three campaigns were carried out in each season (rainy and dry), during which surface water was sampled for abiotic parameter analyses. The TRIX index was used for trophic status assessment. For the temporal evaluation, a review of literature addressing the matter in the study area was conducted. Between 2017 and 2018, the TRIX index varied from a mean of 6 ± 0.2 upstream to 5 ± 0.4 downstream during the rainy season, indicating eutrophic conditions throughout most of the FRES extension, especially near the Formoso River, and from 6 ± 1 to 3 ± 0.8 during the dry season. Temporal analyses showed that in 2002 the overall mean TRIX index was 5.72 ± 0.4, decreasing in 2005 and 2014, and followed by an upwards trend. We conclude that the FRES is impacted by the release of untreated effluents such as sewage and fertilizers from the city of Rio Formoso and from various agricultural activities, which are more intense during the rainy season. Nevertheless, over time there were more critical scenarios pertaining to the trophic status. The present diagnosis reinforces the importance of public sanitation policies in estuarine regions and spatial planning instruments for pollution control in fishery areas.

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Phytoplankton community dynamics in response to seawater intrusion in a tropical macrotidal river-estuary continuum

et al. 2022

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Algal blooms and trophic state in a tropical estuary blocked by a dam (northeastern Brazil)

Cited by 7 publications

References 38 publications

Trophic state index ( TSI ) and carrying capacity estimation of aquaculture development; the application of total phosphorus budget

Trophic state index ( TSI ) and carrying capacity estimation of aquaculture development; the application of total phosphorus budget

Assessment of the trophic status in a tropical estuarine system

Phytoplankton community dynamics in response to seawater intrusion in a tropical macrotidal river-estuary continuum

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