Transport of nutrients from the Seybouse River to Annaba Bay (Algeria, SW Mediterranean)

Ziouch, Omar Ramzi; Laskri, Hadjer; Chenaker, Houda; Ledjedel, Nedjm Eddine; Daifallah, Tarek; Ounissi, Makhlouf

doi:10.1016/j.marpolbul.2020.111231

Cited by 10 publications

(2 citation statements)

References 52 publications

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“…In Annaba Bay, the Seybouse wadi (Fig. 11, wadi 1) input is highly concentrated in PO4 and NH4 compared to Mediterranean rivers (Ounissi et al, 2014), and presents a potential risk of eutrophication (Ziouch et al, 2020). The observed peaks of Chl-a (and IB) are associated with different contributions (Table 2): the type of coast (sandy and rocky), the presence of wadis and large cities, and the presence of bays.…”

Section: Sources Of Coastal Enrichmentmentioning

confidence: 99%

Spatio-temporal variability of a chlorophyll-a based biomass index and influence of coastal sources of enrichment in the Algerian Basin

Harid

Demarcq

Keraghel

et al. 2022

Continental Shelf Research

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Section: Sources Of Coastal Enrichmentmentioning

confidence: 99%

Spatio-temporal variability of a chlorophyll-a based biomass index and influence of coastal sources of enrichment in the Algerian Basin

Harid

Demarcq

Keraghel

et al. 2022

Continental Shelf Research

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“…The maritime traffic and untreated domestic discharges from 16 million inhabitants along the Algerian coast are other factors influencing sea contamination. This situation exerts great pressure on the coastal marine ecosystem and worsening conditions can be observed on large sections of the coast, particularly in the gulfs close to the biggest agglomerations, such as Algiers, Oran and Annaba (Grimes, 2003) and near the industrial-harbour complexes, like Arzew, Bejaia, Ghazaouet, Skikda and Annaba (Belhadj et al, 2017;Amira et al, 2018;Amamra et al, 2019;Drif et al, 2019;Ziouch et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Marine pollution effects on the reproduction process of Perinereis cultrifera (Annelida, Polychaeta) in Algeria

et al. 2023

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The Mediterranean Sea is one of the busiest areas worldwide in terms of maritime activity and faces considerable anthropogenic disturbances, such as pollution by hydrocarbons and heavy metals. This study evaluated the environmental status of three sites on the Algerian coast using the annelid polychaete Perinereis cultrifera as a biomonitoring sentinel species. It included different reproductive parameters such as oocyte diameter, frequency distributions, sexual maturity index, biochemical quantitative parameters represented by the vitellogenins and vitellins, and a histological study of the coelome during the reproductive period. The results showed that the females collected from El-Kala (healthy site) have the highest diameter 304.1 ± 24.3 μm during April but the values were increased in Annaba 290.0 ± 21.0 μm and Skikda 245.3 ± 26.7 μm. Significant differences were observed between worms from the three study sites during the three months of the study. Moreover, the size-frequency indicated that a relatively high proportion of females containing mature oocytes was found in April in females collected at El-Kala 52.4%, 46.4% in females collected at Annaba and 36.7% in females collected at Skikda. In addition, regarding the sexual maturity index, the highest values were recorded in April (3.8, 2.9, and 1.9) at the El-Kala, Annaba, and Skikda study sites. However, the biochemical analysis demontrated that the highest mean concentration of vitellogenin was in females of El-Kala (5.3 ± 0.3 µg/mg of coelomic fluid) in April, and the lowest mean concentration was measured in females of Skikda (1.5 ± 0.2 µg/mg of coelomic fluid). Therefore, the highest mean concentration of vitellin was measured in females of El-Kala (4.4 ± 0.2 µg/mg of oocytes) in April, while the lowest mean concentration of vitellin was measured in females of Skikda (1.02 ± 0.2 µg/mg of oocytes) in May. Significant differences were observed between worms from the three sites during the three months of the study. Furthermore, histological observations revealed that oogenesis was asynchronous, with oocytes at different stages of vitellogenesis simultaneously present. The structure of the oocytes of females collected at El-Kala showed intense vitellogenic activity due to the presence of very dense yolk cells. In contrast, the oocytes of the females collected from the two polluted sites (Annaba and Skikda) were small, vitellogenesis presented low intensity, and yolk cells were less frequent at the periphery and less uniform at the cytoplasmic mass; the nucleus was smaller, indicating a slower vitellogenic activity. These observations confirm the previously obtained results.

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Growth and reproduction of Donax trunculus from the Gulf of Annaba (Northeast Algeria) in relation to environmental conditions

Hamdani

Soltani

Zaidi

2020

Environ Sci Pollut Res

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Transport of nutrients from the Seybouse River to Annaba Bay (Algeria, SW Mediterranean)

Cited by 10 publications

References 52 publications

Spatio-temporal variability of a chlorophyll-a based biomass index and influence of coastal sources of enrichment in the Algerian Basin

Spatio-temporal variability of a chlorophyll-a based biomass index and influence of coastal sources of enrichment in the Algerian Basin

Marine pollution effects on the reproduction process of Perinereis cultrifera (Annelida, Polychaeta) in Algeria

Growth and reproduction of Donax trunculus from the Gulf of Annaba (Northeast Algeria) in relation to environmental conditions

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