Evaluation of ecosystem status in the shelf-slope zone of the northeastern Black Sea based on the trophic index (TRIX)

Romanova, N. D.; Часовников, В. К.; Арашкевич, Е. Г.; Мошаров, С. А.; Никишина, А. Б.; Kostyleva, A. V.; Louppova, N. E.

doi:10.1134/s000143701601015x

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…In different researches the authors use E-TRIX index calculated according to monitoring observations for various shallow water areas: near-shore zone of the Adriatic and Tyrrhenian seas [3,4], certain gulfs of the Marmara Sea [5], the northeastern shelf of the Black Sea [6], the Danube region, Bulgarian near-shore zone, the Odessa Gulf in the north-western Black Sea [7,8], Sevastopol near-shore zone [9,10].…”

Section: The Trophic Index E-trixmentioning

confidence: 99%

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Comparative Assessment of the Trophic Level of the Sevastopol and Yuzhnaya Bays Using E-TRIX Index

Slepchuk¹,

Khmara²,

Man’kovskaya³

2017

PhO

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The ecological state of the Sevastopol Bay and the Yuzhnaya Bay is compared by their trophic level using the E-TRIX index. E-TRIX is defined by four state variables, which are strongly correlated with primary production: chlorophyll a, oxygen as absolute % deviation from saturation, dissolved inorganic nitrogen, and total phosphorous. The annual dynamics of biogenic elements is calculated; the one-dimensional water quality model, which has been calibrated for the referred water areas, is used. The annual E-TRIX index variations in the bays are compared; the correlation coefficients between E-TRIX and its parameters are calculated; the contributions of E-TRIX variables are estimated.The annual variation of biogeochemical parameters in the Sevastopol and Yuzhnaya bays has been simulated and E-TRIX index has been estimated. The calculations have showed that on the average the Yuzhnaya Bay has higher trophic level: the average E-TRIX index equals 4.47. In the Sevastopol Bay, the average E-TRIX value equals 4.01. The maximum values of the index have reached 5.53 for the Yuzhnaya Bay and 4.55 for the Sevastopol Bay. However, when the level of phosphates concentration which are the main limiting nutrient elements in the Sevastopol Bay is higher than in the Yuzhnaya Bay (from early July to middle August), the trophic index in the Yuzhnaya Bay is lower than in the Sevastopol Bay.The relative contribution of components in the E-TRIX index has been estimated. It has been revealed that the main factor determining the trophic level in the Sevastopol and Yuzhnaya bays water is the concentration of dissolved inorganic nitrogen. The contributions of the other components in the E-TRIX index are equivalent.

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Section: The Trophic Index E-trixmentioning

confidence: 99%

“…E-TRIX index vary from 0 to 10 [2]. Depending on Е-TRIX, four trophic levels are determined: low (< 4); medium (4-5); high (5-6) and very high (6)(7)(8)(9)(10).…”

Section: The Trophic Index E-trixmentioning

confidence: 99%

Comparative Assessment of the Trophic Level of the Sevastopol and Yuzhnaya Bays Using E-TRIX Index

Slepchuk¹,

Khmara²,

Man’kovskaya³

2017

PhO

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Studies of the Seasonal Variability of Oxygen, Apparent Oxygen Utilization, and Chlorophyll-A in the Northeastern Part of the Black Sea in 2012

2022

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Box-model of the shelf ecosystem of the Black Sea and simulation results

Solovjova

2024

Hydrosphere Еcology (Экология Гидросферы)

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The article describes the mathematical model of the shelf ecological system and its results for the northwestern and eastern coastal areas. The obtained results were compared with available data from field and satellite observations. The agreement obtained provides a basis for concluding that the model can be used to assess the impact of human activity and climate change on coastal and shelf ecosystems in the Black Sea.

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Evaluation of ecosystem status in the shelf-slope zone of the northeastern Black Sea based on the trophic index (TRIX)

Cited by 3 publications

References 8 publications

Comparative Assessment of the Trophic Level of the Sevastopol and Yuzhnaya Bays Using E-TRIX Index

Comparative Assessment of the Trophic Level of the Sevastopol and Yuzhnaya Bays Using E-TRIX Index

Studies of the Seasonal Variability of Oxygen, Apparent Oxygen Utilization, and Chlorophyll-A in the Northeastern Part of the Black Sea in 2012

Box-model of the shelf ecosystem of the Black Sea and simulation results

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