Full Member
Dr. Sarah H. Rashedy
Membership since:
2026
Field of activity:
About me
Dr. Sarah Hamdy is an assistant professor in the hydrobiology lab at the Marine Environment Division of the National Institute of Oceanography and Fisheries, Egypt. My research focuses on marine macroalgae ecology, seaweed diversity, and the environmental factors influencing their distribution in the Red Sea. My scientific interests include the effects of temperature and climate change on seaweed growth, abundance, and physiological responses. I also studied the ecological role of seaweeds in marine ecosystems, including their potential for carbon sequestration and their applications in sustainable marine resources. I have published several scientific papers in marine biology and phycology and contribute to collaborative research related to marine biodiversity and environmental monitoring. My work also explores the potential for seaweed cultivation in the Red Sea as a sustainable approach to support future blue economy initiatives in Egypt.
Degrees:
Publications resulting from Research
1. Sarah H. Rashedy, Abd El Hafez, M. (2025). 'Seasonal Biomass Dynamics and Zygote Cultivation of Sargassum aquifolium on Different Substrates in the Red Sea', Egyptian Journal of Aquatic Biology and Fisheries, 29(3), pp. 1117-1132. doi: 10.21608/ejabf.2025.429567.
2. Farag, W., Ali, A., Hussein, R., Sarah H. Rashedy, & Touliabah, H. (2025). Red Sea Macroalgae as a Source of Sulfated Polysaccharides: biomedical, and cosmeceutical perspectives. Egyptian Journal of Phycology, 26(1), 136-149. doi: 10.21608/egyjs.2025.410586.1052
3. Saber AA, Sarah H. Rashedy, Rushdi MI, et al. Insights into the Phytochemical and Pharmacological Natural Products of the Green Macroalga Halimeda (Chlorophyta). (2025). Natural Product Communications.;20(3). doi:10.1177/1934578X251331137.
4. Bassel M. Hassen, Sarah H. Rashedy, Ahmed Mostafa, Noura Mahrous, Mohamed S. Nafie, Dalia Elebeedy & A. Z. Abdel Azeiz (2024). Identification of potential antiviral compounds from Egyptian marine algae against influenza A virus, Natural Product Research, DOI: 10.1080/14786419.2023.2284865
5. Sarah H. Rashedy, El sayed A.E. Hamed, I.M. El-Manawy, and Pereira, L. (2023). Stability of macroalgal assemblage in the mangrove swamp as an indicator for the health and quality of the Red Sea waters, Egyptian Journal of Aquatic Research, https://doi.org/10.1016/j.ejar.2023.01.004.
6. Hamed, El Sayed A. E.; Sarah H. Rashedy H.; Ahmed, Hamdy O.; Al-Amgad, Zeinab (2023). Marine Algae Based-Meal as Substitute Ingredient Feeds for the Fighting Conch Strombus tricornis L. (Mollusca, Gastropoda): Body Weights and Histomorphological Studies. Egyptian Journal of Aquatic Biology & Fisheries, 2023, Vol 27, Issue 6, p687.
7. Sarah H. Rashedy, El-Mahdy, S., El-Manawy, I. and Pereira, L. (2022). Spatial and temporal variations of macroalgal vegetation in the north-western Red Sea. Botanica Marina, 26: 3-13.
8. Hafez, M.S.M.A.E.; Sarah H. Rashedy.; Abdelmotilib, N.M.; El-Hassayeb, H.E.A.; Cotas, J.; Pereira, L. (2022). Fillet Fish Fortified with Algal Extracts of Codium tomentosum and Actinotrichia fragilis, as a Potential Antibacterial and Antioxidant Food Supplement. Mar. Drugs, 20, 785.
9. Sarah H. Rashedy, Mohamed S.M. Abd El Hafez, Mahmoud A. Dar, João Cotas and Leonel Pereira (2021). Evaluation and characterization of alginate extracted from brown seaweed collected in the Red Sea. Applied Science journal 11, 6290:1-17.
10. Omer, M. Y., Abd El-Wakeil, K. F., Hussein, H.N.M. and Sarah H. Rashedy (2021). Invertebrate Assemblages Associated with Seaweeds at Different locations in the Red Sea, Egypt. Egyptian Journal of Aquatic Biology & Fisheries. 25(1): 407 – 421.
11. Madkour, A., Rashedy, S., Touliabah, H. (2020). Bioremediation of Ammonium and Phosphates and their Effect on the Macroalgae Dictyota dichotoma (Hudson) Lamouroux Native to the Red Sea Coast, Egypt. Egyptian Journal of Botany, 60(3), 671-680. doi: 10.21608/ejbo.2020.21997.1430
12. Amany G. Madkour, Sarah H. Rashedy and Mahmoud A. Dar (2019). Spatial and temporal variations of heavy metals accumulation in some macroalgal flora of the Red Sea. Egyptian Journal of Aquatic Biology & Fisheries, 23(4): 539 – 549.
13. Islam M. El-Manawy, Mohamed Z. Nassar and Sarah H. Rashedy (2019). Spatial and temporal variations in the nutritional composition of some seaweed from the Red Sea, Egypt. Egyptian J. of Phycol. Vol.20.
14. Islam M. El-Manawy, Mohamed Z. Nassar, Nayer M. Fahmy and Sarah H. Rashedy; (2019). Evaluation of proximate composition, antioxidant and antimicrobial activities of some seaweeds from the Red Sea coast, Egypt. Egyptian Journal of Aquatic Biology & Fisheries.
15. Amany G. Madkour, Sarah H. Rashedy Mahmoud A. Dar Amal Z. Farahat Tarek A. Mohammed (2017). The Differential Efficiency of Chlorella vulgaris and Oscillatoria sp. to treat the Municipal Wastewater. Journal of Biology, Agriculture and Healthcare.
16. Nassar M. Z., Galal H. R. M., Khairy H. M., and Sarah H. Rashedy. (2014): Seasonal fluctuations of phytoplankton community and physico-chemical parameters of the north western part of the Red Sea, Egypt. Egyptian Journal of Aquatic Research. Vol.40 (4): 395-403. https://doi.org/10.1016/j.ejar.2014.11.002.
Book
• Shams, N. G and Rashedy, S. H. (2023). Biodiversity of Seaweeds in the Egyptian Marine Waters. Springer Cham, 978-3-031-33365-1Published: 23 August 2023. Series ISSN2730-6674. PXIV, 308. https://doi.org/10.1007/978-3-031-33366-8.
Chapters
1. Rashedy, S.H., Madkour, A.G. (2025). Phytoremediation Potential of Seaweeds: Exploring Their Environmental Cleanup Capabilities. In: Trivedi, N., Reddy, C., Critchley, A.T. (eds) Recent Advances in Seaweed Biotechnology. Springer, Singapore. https://doi.org/10.1007/978-981-96-0519-411.
2. Rashedy, S.H. (2023). Ocean Acidification Conditions and Marine Diatoms. In: Srivastava, P., Khan, A.S., Verma, J., Dhyani, S. (eds) Insights into the World of Diatoms: From Essentials to Applications. Plant Life and Environment Dynamics. Springer, Singapore. https://doi.org/10.1007/978-981-19-5920-25.
3. El-Manaway, I.M., Rashedy, S.H. (2022). The Ecology and Physiology of Seaweeds: An Overview. In: Ranga Rao, A., Ravishankar, G.A. (eds) Sustainable Global Resources of Seaweeds Volume 1. Springer, Cham. https://doi.org/10.1007/978-3-030-91955-91.
2. Farag, W., Ali, A., Hussein, R., Sarah H. Rashedy, & Touliabah, H. (2025). Red Sea Macroalgae as a Source of Sulfated Polysaccharides: biomedical, and cosmeceutical perspectives. Egyptian Journal of Phycology, 26(1), 136-149. doi: 10.21608/egyjs.2025.410586.1052
3. Saber AA, Sarah H. Rashedy, Rushdi MI, et al. Insights into the Phytochemical and Pharmacological Natural Products of the Green Macroalga Halimeda (Chlorophyta). (2025). Natural Product Communications.;20(3). doi:10.1177/1934578X251331137.
4. Bassel M. Hassen, Sarah H. Rashedy, Ahmed Mostafa, Noura Mahrous, Mohamed S. Nafie, Dalia Elebeedy & A. Z. Abdel Azeiz (2024). Identification of potential antiviral compounds from Egyptian marine algae against influenza A virus, Natural Product Research, DOI: 10.1080/14786419.2023.2284865
5. Sarah H. Rashedy, El sayed A.E. Hamed, I.M. El-Manawy, and Pereira, L. (2023). Stability of macroalgal assemblage in the mangrove swamp as an indicator for the health and quality of the Red Sea waters, Egyptian Journal of Aquatic Research, https://doi.org/10.1016/j.ejar.2023.01.004.
6. Hamed, El Sayed A. E.; Sarah H. Rashedy H.; Ahmed, Hamdy O.; Al-Amgad, Zeinab (2023). Marine Algae Based-Meal as Substitute Ingredient Feeds for the Fighting Conch Strombus tricornis L. (Mollusca, Gastropoda): Body Weights and Histomorphological Studies. Egyptian Journal of Aquatic Biology & Fisheries, 2023, Vol 27, Issue 6, p687.
7. Sarah H. Rashedy, El-Mahdy, S., El-Manawy, I. and Pereira, L. (2022). Spatial and temporal variations of macroalgal vegetation in the north-western Red Sea. Botanica Marina, 26: 3-13.
8. Hafez, M.S.M.A.E.; Sarah H. Rashedy.; Abdelmotilib, N.M.; El-Hassayeb, H.E.A.; Cotas, J.; Pereira, L. (2022). Fillet Fish Fortified with Algal Extracts of Codium tomentosum and Actinotrichia fragilis, as a Potential Antibacterial and Antioxidant Food Supplement. Mar. Drugs, 20, 785.
9. Sarah H. Rashedy, Mohamed S.M. Abd El Hafez, Mahmoud A. Dar, João Cotas and Leonel Pereira (2021). Evaluation and characterization of alginate extracted from brown seaweed collected in the Red Sea. Applied Science journal 11, 6290:1-17.
10. Omer, M. Y., Abd El-Wakeil, K. F., Hussein, H.N.M. and Sarah H. Rashedy (2021). Invertebrate Assemblages Associated with Seaweeds at Different locations in the Red Sea, Egypt. Egyptian Journal of Aquatic Biology & Fisheries. 25(1): 407 – 421.
11. Madkour, A., Rashedy, S., Touliabah, H. (2020). Bioremediation of Ammonium and Phosphates and their Effect on the Macroalgae Dictyota dichotoma (Hudson) Lamouroux Native to the Red Sea Coast, Egypt. Egyptian Journal of Botany, 60(3), 671-680. doi: 10.21608/ejbo.2020.21997.1430
12. Amany G. Madkour, Sarah H. Rashedy and Mahmoud A. Dar (2019). Spatial and temporal variations of heavy metals accumulation in some macroalgal flora of the Red Sea. Egyptian Journal of Aquatic Biology & Fisheries, 23(4): 539 – 549.
13. Islam M. El-Manawy, Mohamed Z. Nassar and Sarah H. Rashedy (2019). Spatial and temporal variations in the nutritional composition of some seaweed from the Red Sea, Egypt. Egyptian J. of Phycol. Vol.20.
14. Islam M. El-Manawy, Mohamed Z. Nassar, Nayer M. Fahmy and Sarah H. Rashedy; (2019). Evaluation of proximate composition, antioxidant and antimicrobial activities of some seaweeds from the Red Sea coast, Egypt. Egyptian Journal of Aquatic Biology & Fisheries.
15. Amany G. Madkour, Sarah H. Rashedy Mahmoud A. Dar Amal Z. Farahat Tarek A. Mohammed (2017). The Differential Efficiency of Chlorella vulgaris and Oscillatoria sp. to treat the Municipal Wastewater. Journal of Biology, Agriculture and Healthcare.
16. Nassar M. Z., Galal H. R. M., Khairy H. M., and Sarah H. Rashedy. (2014): Seasonal fluctuations of phytoplankton community and physico-chemical parameters of the north western part of the Red Sea, Egypt. Egyptian Journal of Aquatic Research. Vol.40 (4): 395-403. https://doi.org/10.1016/j.ejar.2014.11.002.
Book
• Shams, N. G and Rashedy, S. H. (2023). Biodiversity of Seaweeds in the Egyptian Marine Waters. Springer Cham, 978-3-031-33365-1Published: 23 August 2023. Series ISSN2730-6674. PXIV, 308. https://doi.org/10.1007/978-3-031-33366-8.
Chapters
1. Rashedy, S.H., Madkour, A.G. (2025). Phytoremediation Potential of Seaweeds: Exploring Their Environmental Cleanup Capabilities. In: Trivedi, N., Reddy, C., Critchley, A.T. (eds) Recent Advances in Seaweed Biotechnology. Springer, Singapore. https://doi.org/10.1007/978-981-96-0519-411.
2. Rashedy, S.H. (2023). Ocean Acidification Conditions and Marine Diatoms. In: Srivastava, P., Khan, A.S., Verma, J., Dhyani, S. (eds) Insights into the World of Diatoms: From Essentials to Applications. Plant Life and Environment Dynamics. Springer, Singapore. https://doi.org/10.1007/978-981-19-5920-25.
3. El-Manaway, I.M., Rashedy, S.H. (2022). The Ecology and Physiology of Seaweeds: An Overview. In: Ranga Rao, A., Ravishankar, G.A. (eds) Sustainable Global Resources of Seaweeds Volume 1. Springer, Cham. https://doi.org/10.1007/978-3-030-91955-91.