Ecological status of a West African lagoon complex under anthropogenic pressure, Toho-Todougba complex, Benin
Management and preservation of aquatic environments are essential for their productivity and the maintenance of aquatic life. This study aims to characterize the trophic state of Todougba complex which has been subject for several years, to an intense fish production in cages. For this purpose, phys...
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| Veröffentlicht in: | International journal of aquatic biology 2021-10, Vol.9 (5), p.279-289 |
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| creator | Achoh, Mardochée Ephraim Agadjihouedé, Hyppolite Gangbe, Luc Houssou, Arsene Aizonou, Romaric Montcho, Simon Ahouanssou Chikou, Antoine |
| description | Management and preservation of aquatic environments are essential for their productivity and the maintenance of aquatic life. This study aims to characterize the trophic state of Todougba complex which has been subject for several years, to an intense fish production in cages. For this purpose, physico-chemical parameters were measured from June 2019 to May 2020 as well as chlorophyll-a, phosphorus and nitrogen. The trophic characterization indices were calculated basedo n Carlson (1977), Burns and Bryers (2000), Neverova-Dziopak and Kowalewski (2018), Primpas et al. (2010) and CCME-WQI (2001). It appears that the temperature (29°C), dissolved oxygen (3.19 mg.L-1 to 4.33 mg.L-1) and pH (6.66 to 7.31) are those characteristic of tropical lake environments. The production parameters revealed that the chlorophyll-a concentration varies from 0.19 to 37 mg.L-1 (stations and months combined). The concentration of phosphorus ranged from 0.02 to 0.42 mg.L-1 while nitrogen varied from 1.91 to 4.03 mg.L-1. Only nitrogen is not in critical proportion for the ecosystem. It should be noted that with the exception of the Carlson index, all other indices revealed that the ecosystem is in a state of advanced eutrophication with a tendency to hyper-trophication according to the eutrophication index of Primpas et al. (2010). Consequently, Toho-Todougba lagoon complex is eutrophic and requires adequate measures for its restoration despite its good health revealed by the physico-chemical parameters. 10.22034/ijab.v9i5.1033 |
| doi_str_mv | 10.22034/ijab.v9i5.1033 |
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This study aims to characterize the trophic state of Todougba complex which has been subject for several years, to an intense fish production in cages. For this purpose, physico-chemical parameters were measured from June 2019 to May 2020 as well as chlorophyll-a, phosphorus and nitrogen. The trophic characterization indices were calculated basedo n Carlson (1977), Burns and Bryers (2000), Neverova-Dziopak and Kowalewski (2018), Primpas et al. (2010) and CCME-WQI (2001). It appears that the temperature (29°C), dissolved oxygen (3.19 mg.L-1 to 4.33 mg.L-1) and pH (6.66 to 7.31) are those characteristic of tropical lake environments. The production parameters revealed that the chlorophyll-a concentration varies from 0.19 to 37 mg.L-1 (stations and months combined). The concentration of phosphorus ranged from 0.02 to 0.42 mg.L-1 while nitrogen varied from 1.91 to 4.03 mg.L-1. Only nitrogen is not in critical proportion for the ecosystem. It should be noted that with the exception of the Carlson index, all other indices revealed that the ecosystem is in a state of advanced eutrophication with a tendency to hyper-trophication according to the eutrophication index of Primpas et al. (2010). Consequently, Toho-Todougba lagoon complex is eutrophic and requires adequate measures for its restoration despite its good health revealed by the physico-chemical parameters. 10.22034/ijab.v9i5.1033</description><identifier>ISSN: 2383-0956</identifier><identifier>EISSN: 2322-5270</identifier><identifier>DOI: 10.22034/ijab.v9i5.1033</identifier><language>eng</language><publisher>Karaj: Iranian Society of Ichthyology</publisher><subject>Anthropogenic factors ; Aquatic environment ; Aquatic organisms ; Cages ; Chlorophyll ; Chlorophyll a ; Dissolved oxygen ; Eutrophication ; Fish ; Lagoons ; Nitrogen ; Parameters ; Phosphorus ; Restoration ; Trophic state ; Tropical climate ; Tropical lakes</subject><ispartof>International journal of aquatic biology, 2021-10, Vol.9 (5), p.279-289</ispartof><rights>2021. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Achoh, Mardochée Ephraim</creatorcontrib><creatorcontrib>Agadjihouedé, Hyppolite</creatorcontrib><creatorcontrib>Gangbe, Luc</creatorcontrib><creatorcontrib>Houssou, Arsene</creatorcontrib><creatorcontrib>Aizonou, Romaric</creatorcontrib><creatorcontrib>Montcho, Simon Ahouanssou</creatorcontrib><creatorcontrib>Chikou, Antoine</creatorcontrib><title>Ecological status of a West African lagoon complex under anthropogenic pressure, Toho-Todougba complex, Benin</title><title>International journal of aquatic biology</title><description>Management and preservation of aquatic environments are essential for their productivity and the maintenance of aquatic life. This study aims to characterize the trophic state of Todougba complex which has been subject for several years, to an intense fish production in cages. For this purpose, physico-chemical parameters were measured from June 2019 to May 2020 as well as chlorophyll-a, phosphorus and nitrogen. The trophic characterization indices were calculated basedo n Carlson (1977), Burns and Bryers (2000), Neverova-Dziopak and Kowalewski (2018), Primpas et al. (2010) and CCME-WQI (2001). It appears that the temperature (29°C), dissolved oxygen (3.19 mg.L-1 to 4.33 mg.L-1) and pH (6.66 to 7.31) are those characteristic of tropical lake environments. The production parameters revealed that the chlorophyll-a concentration varies from 0.19 to 37 mg.L-1 (stations and months combined). The concentration of phosphorus ranged from 0.02 to 0.42 mg.L-1 while nitrogen varied from 1.91 to 4.03 mg.L-1. Only nitrogen is not in critical proportion for the ecosystem. It should be noted that with the exception of the Carlson index, all other indices revealed that the ecosystem is in a state of advanced eutrophication with a tendency to hyper-trophication according to the eutrophication index of Primpas et al. (2010). Consequently, Toho-Todougba lagoon complex is eutrophic and requires adequate measures for its restoration despite its good health revealed by the physico-chemical parameters. 10.22034/ijab.v9i5.1033</description><subject>Anthropogenic factors</subject><subject>Aquatic environment</subject><subject>Aquatic organisms</subject><subject>Cages</subject><subject>Chlorophyll</subject><subject>Chlorophyll a</subject><subject>Dissolved oxygen</subject><subject>Eutrophication</subject><subject>Fish</subject><subject>Lagoons</subject><subject>Nitrogen</subject><subject>Parameters</subject><subject>Phosphorus</subject><subject>Restoration</subject><subject>Trophic state</subject><subject>Tropical climate</subject><subject>Tropical lakes</subject><issn>2383-0956</issn><issn>2322-5270</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqNjU1rg0AURYfQQkKbdbYPuo1mPnTUZVtS8gOELGU0o1Em88yME_LzayHZd3UvnHO5hGwYjTmnItn1g6rjW9GnMaNCLMiKC86jlGf05a_nIqJFKpdk7f1AKWUiYTkvVuSyb9Bg1zfKgJ_UFDxgCwqO2k_w2boZWDCqQ7TQ4GU0-g7BnrQDZaezwxE7bfsGRqe9D05vocQzRiWeMHS1em628DVr9p28tsp4vX7kG_n42Zffh2h0eA3zZTVgcHZGFZcskYnMCin-Z_0CetRRgw</recordid><startdate>20211001</startdate><enddate>20211001</enddate><creator>Achoh, Mardochée Ephraim</creator><creator>Agadjihouedé, Hyppolite</creator><creator>Gangbe, Luc</creator><creator>Houssou, Arsene</creator><creator>Aizonou, Romaric</creator><creator>Montcho, Simon Ahouanssou</creator><creator>Chikou, Antoine</creator><general>Iranian Society of Ichthyology</general><scope>7QH</scope><scope>7UA</scope><scope>8FE</scope><scope>8FH</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>CWDGH</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H95</scope><scope>HCIFZ</scope><scope>L.G</scope><scope>LK8</scope><scope>M7P</scope><scope>PCBAR</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20211001</creationdate><title>Ecological status of a West African lagoon complex under anthropogenic pressure, Toho-Todougba complex, Benin</title><author>Achoh, Mardochée Ephraim ; 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This study aims to characterize the trophic state of Todougba complex which has been subject for several years, to an intense fish production in cages. For this purpose, physico-chemical parameters were measured from June 2019 to May 2020 as well as chlorophyll-a, phosphorus and nitrogen. The trophic characterization indices were calculated basedo n Carlson (1977), Burns and Bryers (2000), Neverova-Dziopak and Kowalewski (2018), Primpas et al. (2010) and CCME-WQI (2001). It appears that the temperature (29°C), dissolved oxygen (3.19 mg.L-1 to 4.33 mg.L-1) and pH (6.66 to 7.31) are those characteristic of tropical lake environments. The production parameters revealed that the chlorophyll-a concentration varies from 0.19 to 37 mg.L-1 (stations and months combined). The concentration of phosphorus ranged from 0.02 to 0.42 mg.L-1 while nitrogen varied from 1.91 to 4.03 mg.L-1. Only nitrogen is not in critical proportion for the ecosystem. It should be noted that with the exception of the Carlson index, all other indices revealed that the ecosystem is in a state of advanced eutrophication with a tendency to hyper-trophication according to the eutrophication index of Primpas et al. (2010). Consequently, Toho-Todougba lagoon complex is eutrophic and requires adequate measures for its restoration despite its good health revealed by the physico-chemical parameters. 10.22034/ijab.v9i5.1033</abstract><cop>Karaj</cop><pub>Iranian Society of Ichthyology</pub><doi>10.22034/ijab.v9i5.1033</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Anthropogenic factors Aquatic environment Aquatic organisms Cages Chlorophyll Chlorophyll a Dissolved oxygen Eutrophication Fish Lagoons Nitrogen Parameters Phosphorus Restoration Trophic state Tropical climate Tropical lakes |
| title | Ecological status of a West African lagoon complex under anthropogenic pressure, Toho-Todougba complex, Benin |
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