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  1. Article ; Online: Evaluation of the water quality and the eutrophication risk in Ramsar site on Moroccan northern Mediterranean (Marchica lagoon): A multivariate statistical approach

    Ngadi, Hamza / Layachi, Mostafa / Azizi, Ghizlane / Baghour, Mourad / Esseffar, Sara / Loukili, Hamza / Moumen, Abdelmajid

    Marine Pollution Bulletin. 2023 Sept., v. 194 p.115373-

    2023  

    Abstract: This study aimed to assess the extent of eutrophication in the Marchica lagoon, using the trophic index (TRIX), trophic status index (TSI) and Redfield ratio (N/P). Seawater samples were collected monthly from March 2018 to February 2019 from ten ... ...

    Abstract This study aimed to assess the extent of eutrophication in the Marchica lagoon, using the trophic index (TRIX), trophic status index (TSI) and Redfield ratio (N/P). Seawater samples were collected monthly from March 2018 to February 2019 from ten locations in the lagoon. The TRIX index ranged from 1.25 to 8.87, indicating oligotrophic to eutrophic conditions. TSI values ranged from 28.4 to 65.1, indicating ultraoligotrophic to supereutrophic seawater. The Redfield ratio consistently showed N/P values below 16, designating phosphorus as the limiting factor for algal growth. Principal component analysis (PCA) and cluster analysis (CA) revealed distinct coastal water masses based on seasons and sampling regions. Given these findings, urgent conservation and management measures are recommended to address the eutrophication issues threatening the delicate balance of the Marchica lagoon.
    Keywords algae ; cluster analysis ; coastal water ; eutrophication ; marine pollution ; phosphorus ; principal component analysis ; risk ; seawater ; water quality ; Marchica lagoon ; Spatio-temporal distribution of environmental parameters ; TRIX ; TSI ; Ratio N/P
    Language English
    Dates of publication 2023-09
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 2001296-2
    ISSN 1879-3363 ; 0025-326X
    ISSN (online) 1879-3363
    ISSN 0025-326X
    DOI 10.1016/j.marpolbul.2023.115373
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Evaluation of the water quality and the eutrophication risk in Ramsar site on Moroccan northern Mediterranean (Marchica lagoon): A multivariate statistical approach.

    Ngadi, Hamza / Layachi, Mostafa / Azizi, Ghizlane / Baghour, Mourad / Esseffar, Sara / Loukili, Hamza / Moumen, Abdelmajid

    Marine pollution bulletin

    2023  Volume 194, Issue Pt B, Page(s) 115373

    Abstract: This study aimed to assess the extent of eutrophication in the Marchica lagoon, using the trophic index (TRIX), trophic status index (TSI) and Redfield ratio (N/P). Seawater samples were collected monthly from March 2018 to February 2019 from ten ... ...

    Abstract This study aimed to assess the extent of eutrophication in the Marchica lagoon, using the trophic index (TRIX), trophic status index (TSI) and Redfield ratio (N/P). Seawater samples were collected monthly from March 2018 to February 2019 from ten locations in the lagoon. The TRIX index ranged from 1.25 to 8.87, indicating oligotrophic to eutrophic conditions. TSI values ranged from 28.4 to 65.1, indicating ultraoligotrophic to supereutrophic seawater. The Redfield ratio consistently showed N/P values below 16, designating phosphorus as the limiting factor for algal growth. Principal component analysis (PCA) and cluster analysis (CA) revealed distinct coastal water masses based on seasons and sampling regions. Given these findings, urgent conservation and management measures are recommended to address the eutrophication issues threatening the delicate balance of the Marchica lagoon.
    MeSH term(s) Water Quality ; Environmental Monitoring ; Eutrophication ; Seasons ; Seawater
    Language English
    Publishing date 2023-08-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 2001296-2
    ISSN 1879-3363 ; 0025-326X
    ISSN (online) 1879-3363
    ISSN 0025-326X
    DOI 10.1016/j.marpolbul.2023.115373
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Biomonitoring heavy metals (Cu, Li and Mn) in the Marchica Lagoon of Morocco using Mytilus galloprovincialis

    Azizi Ghizlane / Akodad Mustapha / Layachi Mostafa / Baghour Mourad / Said Bellahcen / Ait Hmeid Hanane / Ngadi Hamza / Gueddari Hicham / Esseffar Sara / Riouchi Ouassila / Moumen Abdelmajid

    E3S Web of Conferences, Vol 364, p

    2023  Volume 01007

    Abstract: Concentration of Copper, Lithium and Manganese were determined in the whole soft tissues of Mytilus galloprovincialis, collected from the two sites (Bni Ansar and Kariat Arekmane) of the Marchica lagoon of Morocco. The mussels were sampled on December ... ...

    Abstract Concentration of Copper, Lithium and Manganese were determined in the whole soft tissues of Mytilus galloprovincialis, collected from the two sites (Bni Ansar and Kariat Arekmane) of the Marchica lagoon of Morocco. The mussels were sampled on December and July of 2019. The ability of mussels to accumulate metals was arranged in the following order: Li < Cu < Mn. The levels of heavy metals in M. galloprovincialis were higher (P<0.05) in December (7.38, 2.63 and 11.10 mg/kg d.w., for Cu, Li and Mn, respectively) than July (5.56, 1.85 and 7.24 mg/kg d.w., for Cu, Li and Mn, respectively) because of the environmental parameters of the seawater and the physiological status of the animal. The trends of accumulations of investigated metals in mussel were higher (P < 0.05) in samples from Bni Ansar than from Kariat Arekmane sites, because of the urban and industrial discharge that submitted the zone of lagoon near to the Bni Ansar city. The Mn concentration in the mussel exceeded the acceptable guidelines limits indicated by international organization, which suggests that consumption of bivalves represents a threat to human health. The studied mussel is suitable biomonitors to investigate heavy metals contamination in the coastal area of the Moroccan Mediterranean coasts.
    Keywords Environmental sciences ; GE1-350
    Subject code 910
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Hydrochemical assessment of groundwater in the Kert aquifer using a GIS application

    Gueddari Hicham / Akodad Mustapha / Baghour Mourad / Moumen Abdelmajid / El Yousfi Yassine / Ait Hmeid Hanane / Chahban Mohamed / Azizi Ghizlane / Benyoussef Said / Alitane Abdennabi / Riouchi Ouassila / Ngadi Hamza

    E3S Web of Conferences, Vol 364, p

    an overview of the control factors for fluoride, arsenic and silica enrichment

    2023  Volume 01008

    Abstract: Our study was based on using a freshwater aquatic species to assess the short-and long-term toxicity of an organophosphate insecticide commonly adopted by the Moroccan agriculture sector. Recently, groundwater pollution has emerged as one of the most ... ...

    Abstract Our study was based on using a freshwater aquatic species to assess the short-and long-term toxicity of an organophosphate insecticide commonly adopted by the Moroccan agriculture sector. Recently, groundwater pollution has emerged as one of the most severe environmental challenges, with a particular emphasis on levels of heavy metal pollution. Conservation efforts and efficient management of groundwater resources are required to determine the full scope of this damage. The current research answers the physical-chemical evaluation of the middle Kert basin’s water quality (Mediterranean area, Driouch province, Eastern Morocco) by collecting 42 samples and measuring pH, TDS that vary between 451 and 5841 mg/l, and EC that range from 0.72 to 9.41mS/cm2 according to ISO 5665. The samples were analyzed by ICP-MS and flame atomic absorption spectrometry to detect fluoride and arsenic content. Whose fluoride in the survey area varied from 0.01 mg/l to 2.85 mg/l. The hydro-chemical classification resulting from the Geographic Information System (GIS) statistical data analysis was used to interpret the analytical data on the phenomena responsible for the mineralization. This quantity is considerably higher than the maximum allowable level of 1.5 mg/L, which is the regulation for drinking water in Morocco. It indicates that both natural and artificial factors have contributed to the effects. Most stations have a fluoride concentration in the water, which can be used to identify them. It is a significant amount less than the values that would be ideal; just four wells have concentrations higher than the values that are legally allowed to be. The fluoride levels in the region’s water sources directly result from the natural elements that make up this particular geographic location.The same happened for arsenic, which exceeded 0.1 mg/l in just two samples.
    Keywords kert basin ; fluoride ; arsenic ; icp-ms ; gis ; Environmental sciences ; GE1-350
    Subject code 333
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Application of eutrophication indices for assessment of the ecological quality of the Moroccan eastern Mediterranean coast

    Ngadi Hamza / Layachi Mostafa / Azizi Ghizlane / Belbachir Chaouki / Esseffar Sara / El Yousfi Yassine / Gueddari Hicham / Rahhou Abderrahmane / Loukili Hamza / Moumen Abdelmajid

    E3S Web of Conferences, Vol 364, p

    Ras Kabdana-Saïdia

    2023  Volume 02008

    Abstract: Eutrophication of littoral seawater is estimated to be one of the main threats to marine biota. Therefore, continuous monitoring is necessary to define areas of potential risk. Our work is an essay to explore the possibility of applying the trophic state ...

    Abstract Eutrophication of littoral seawater is estimated to be one of the main threats to marine biota. Therefore, continuous monitoring is necessary to define areas of potential risk. Our work is an essay to explore the possibility of applying the trophic state index (TRIX) to assess the state of eutrophication along the eastern coast of the Moroccan Mediterranean (Ras Kabdana-Saïdia) in concert with a number of hydro chemical parameters and nutrients descriptors aimed at selection of relevant indicators of marine coastal area ecological quality. Seawater samples were studied monthly during 2018. The following environmental parameters have been considered: temperature, salinity, pH, suspended matter, turbidity, dissolved oxygen, saturation levels, nitrite, nitrate, and orthophosphate. Principal Component Analysis was applied in order to figure out and score the most relevant combination of parameters to discriminate between sites and select representative descriptors (pressure/state) of eutrophication. The following variables are defined as relevant descriptors for classification of the sites: nutrients (N, P) and their molar ratios (N/P), the capacity of the system to produce and sustain organic matter (chlorophyll a), and the trophic state index (TRIX). The results show TRIX values below 4, the eutrophication range indicated that there is no ecological risk. The Ras Kabdana-Saïdia is located in an oligotrophic state.
    Keywords Environmental sciences ; GE1-350
    Subject code 333
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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