Tropic Status Assesment in Segara Anakan Lagoon, Indonesia : Experience in Applying the Trophic Index Trix

Dewi, Rose; Zainuri, Muhammad; Anggoro, Sutrisno; Winanto, Tjahjo; Endrawati, Hadi; Hadisusanto, Suwarno; Sabdono, Agus; Haeruddin, Haeruddin; Muskananfola, Max Rudolf; Nugroho, Denny

doi:10.1088/1755-1315/255/1/012032

Cited by 2 publications

(3 citation statements)

References 17 publications

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“…Some strategies are required to mitigate the existence of eutrophication in the natural site of Belawan waters. Application of TRIX index has been adapted to determine the trophic status of Indonesian Waters such as Segara Anakan Lagoon, Central Java Province [16], Lekok Coast, East Java Province [17], Banten Bay, East Java Province [18], and Kuala Gigieng, Aceh Province [19]. In Segara Anakan, the TRIX assessment revealed that eutrophication are common in highly productive coastal waters, which often leads to anoxia in bottom waters and high levels of harmful algal blooms by phytoplankton.…”

Section: Resultsmentioning

confidence: 99%

“…In Segara Anakan, the TRIX assessment revealed that eutrophication are common in highly productive coastal waters, which often leads to anoxia in bottom waters and high levels of harmful algal blooms by phytoplankton. This is likely caused by various factors such as increased macronutrient levels in the water, which can trigger eutrophication, and are believed to be influenced by factors such as high rainfall during the transition between season, anthropogenic pressure, and aquatic hydrodynamics [16]. In Lekok Coast, the assessment of trophic status through phytoplankton survey determined that the coastal waters had an oligotrophic level of fertility.…”

Section: Resultsmentioning

confidence: 99%

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Phytoplankton abundance and trophic status of Belawan Waters, North Sumatra

Ginting,

Barus,

Wahyuningsih

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Belawan is a district of Medan City and one of estuary areas in North Sumatra that is currently facing pollution due to anthropogenic activities. The study analysed the abundance of phytoplankton and assessed the marine trophic status of Belawan waters to determine the possibility of eutrophication caused by human activities. Water samples were collected from four sampling stations in October 2020: a ship dock (Station-1), a fishery (Station-2), a mangrove area (Station-3), and an estuarine region (Station-4). The abundance of phytoplankton was analysed under a light microscope, and the trophic status of Belawan waters was determined using the Tropical Index for Marine Systems (TRIX), which considers factors such as chlorophyll a content, oxygen saturation, nitrogen, and phosphorus content. The phytoplankton abundance was found to range from 160 ind/L at the ship dock (Station-1) to 241 ind/L at the fishery (Station-2) site. The results indicated a high fertility (hypereutrophic) with a TRIX value greater than 6.0 at both the ship dock (Station-1) and the fishery site (Station-2) in Belawan waters.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Phytoplankton abundance and trophic status of Belawan Waters, North Sumatra

Ginting,

Barus,

Wahyuningsih

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…The data obtained were compared with the classification scale indicated in Table I. These indices were developed for marine and coastal waters in subtropical seas; however, they have been widely used in tropical environments around the world (Anguiano-Cuevas et al 2015, López-Monroy and Troccoli-Ghinaglia 2018, Cutrim et al 2019, Dewi et al 2019.…”

Section: Discussionmentioning

confidence: 99%

Trophic Status of a Tropical Coastal Lagoon in Margarita Island, Venezuela

Pereira-Ibarra

López-Monroy

2021

RICA

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Punta de Piedras Lagoon is a coastal lagoon located south of Margarita Island, in the Venezuelan Caribbean Sea. This lagoon has ecological and economic importance for the inhabitants of nearby communities. Currently, the urban and industrial development in its surroundings represents a potential source of pollutants, providing concentrations of nutrients that could affect the ecological balance of the area. The trophic status of Punta de Piedras Lagoon was evaluated using various trophic indices. The concentrations of chlorophyll-a and nutrients (ammonium, nitrites, nitrates, and orthophosphates) were estimated in 10 stations with a monthly frequency from February 2005 to January 2006. These data were used to estimate the trophic condition based on the Karydis and TRIX trophic indices, and by comparison with Organization for Economic Co-operation and Development reference values. It was found that Punta de Piedras lagoon presented mesotrophic conditions in most of the water body having considerable differences between indices. The values of the closest station to Paseo Esther Gil corresponded to eutrophic waters. However, the circulation and residence time of water allow an exchange with the adjacent sea, which prevents the eutrophication process in the lagoon.

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Tropic Status Assesment in Segara Anakan Lagoon, Indonesia : Experience in Applying the Trophic Index Trix

Cited by 2 publications

References 17 publications

Phytoplankton abundance and trophic status of Belawan Waters, North Sumatra

Phytoplankton abundance and trophic status of Belawan Waters, North Sumatra

Trophic Status of a Tropical Coastal Lagoon in Margarita Island, Venezuela

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