Spatio-temporal variation of microphytoplankton communities in Obhur Creek, the central Red Sea

• Autorzy: El-Sherbiny Mohsen M. , Al-Harbi Mamdouh A. , Kumar Anand J.

Identyfikatory

DOI

10.2478/oandhs-2021-0010

• Języki publikacji: EN

Abstrakty

EN

The abundance and distribution of microphyto-plankton and related physicochemical factors were assessed monthly in Obhur Creek, the central Red Sea. Sampling was carried out near the entrance, the middle and end parts of the creek. During the course of the present study, the Red Sea was characterized by predominantly oligotrophic conditions. Nutrient concentrations were relatively higher in the end part of the creek compared to the two other study sites. Chlorophyll a was also low throughout the year (average: 0.35 ± 0.32 mg m⁻³), except in May when it showed clear peaks at open-water and middle sites of the creek (1.85 and 1.04 mg m⁻³, respectively). Phytoplankton abundance followed a similar pattern to that of chlorophyll a with considerably higher abundance at these sites in May (3063.27 × 10³ and 1082.34 × 10³ individuals m⁻³, respectively). This unusually higher abundance was mostly due to the proliferation of the diatom Pseudo-nitzschia cf. delicatissima (Cleve) Heiden. Silicate concentrations were statistically significantly correlated with total phytoplankton. A total of 220 phytoplankton species were recorded during the study period (117 diatoms, 99 dinoflagellates and four cyanophytes). Diatoms dominated in the phytoplankton abundance (75%) and were followed by dinoflagellates (20%), while cyanophytes accounted for a minimal proportion. Of all phytoplankton species observed during the study, 21 diatom and four dinoflagellate species were considered as new records for the Red Sea, and two diatom and 14 dinoflagellate species were listed as harmful algal species worldwide.

Słowa kluczowe

EN

abundance; distribution; Obhur Creek; phytoplankton; Red Sea

• Wydawca: Institute of Oceanography University of Gdańsk
• Czasopismo: Oceanological and Hydrobiological Studies
• Rocznik: 2021
• Tom: Vol. 50, No. 1
• Strony: 98--114
• Opis fizyczny: Bibliogr. 41 poz.

Twórcy

autor

El-Sherbiny Mohsen M.

• Department of Marine Biology, Faculty of Marine Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
• Department of Marine Sciences, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt

autor

Al-Harbi Mamdouh A.

• Department of Marine Biology, Faculty of Marine Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia

autor

Kumar Anand J.

• Department of Marine Biology, Faculty of Marine Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).