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Search for "ALI": 2 articles found.
EL-NAGDY M.A., ALI E.H., RAWAA A.M., EL-GARNI S. (2022): Comparative study of the diversity of zoosporic fungi (oomycetes and chytrids) in freshwater bodies in Assiut Governorate, Egypt and Jeddah Governorate, Saudi Arabia. [occurrence, regional distribution, heterotrophic straminipiles, Saprolegnia, Achlya, Allomyces, water characteristics.] Czech Mycology 74(2): 153-179 (published: 23rd November, 2022) Electronic supplement
abstract
The diversity, occurrence and regional distribution of heterotrophic straminipiles and true zoosporic fungi (oomycetes and chytrids) recovered from freshwater bodies in two geographically and ecologically distant regions, the governorates of Assiut, Egypt and Jeddah, Saudi Arabia, were extensively investigated and compared in this study. For this purpose, one hundred surface water samples were collected from different localities of freshwater bodies in each governorate during the period from January 2009 to March 2013. In addition, the correlation between physicochemical characteristics (temperature, pH, total soluble salts and organic matter content) of the samples as abiotic factors affecting the diversity and occurrence of zoosporic mycobiota were considered during this research. The results indicate that Assiut Governorate is richer and more diverse in taxa of zoosporic fungi (22 identified and 3 unidentified species classified into 8 genera) than Jeddah Governorate (9 identified and 2 unidentified species belonging to 4 genera). The most dominant genera recovered from the samples were Saprolegnia and Achlya, but these genera showed various frequencies of occurrence. Generally, the majority of the prevalent isolated species of zoosporic fungi were different in the two regions, and identical genera and species showed clear differences in terms of occurrence and distribution. An inverse correlation was revealed between the temperature of the samples and the diversity of isolated zoosporic fungal species. An inconsistent trend was found between the pH of the samples and species diversity: while the correlation was positive in Assiut Governorate, it was negative in Jeddah Governorate. The total soluble salts and organic matter content of the samples in the two governorates correlated positively with the diversity of isolated species.
KHALLIL A.M., ALI E.H., HASSAN E.A., IBRAHIM S.S. (2020): Biodiversity, spatial distribution and seasonality of heterotrophic straminipiles and true zoosporic fungi in two water bodies exposed to different effluents at Assiut (Upper Egypt). [aquatic ecosystems pollution, oomycetes, Allomyces, bioindicators.] Czech Mycology 72(1): 43-70 (published: 29th May, 2020)
abstract
Patterns of frequency, biodiversity and seasonality of fungi-like organisms and true zoosporic fungi in relationship with some abiotic factors of two water bodies exposed to various effluents at Assiut Governorate (Upper Egypt) were investigated. Thirty-four species related to ten genera were isolated from the El-Zinnar irrigation canal and the El-Ibrahimia canal, which receive treated sewage water and the industrial effluents of a factory for oils and detergents, respectively, using the baiting technique during four seasons (from winter 2017 to autumn 2018). The highest fungal diversity was recorded during winter, followed by autumn and spring, whereas summer was the lowest in species diversity. Achlya, Dictyuchus, Allomyces and Pythium were the prevalent genera, whereas Brevilegnia and Pythiopsis were the least frequent ones. Some fungal taxa were present throughout the year while others were highly restricted, occurring in only one season. The species composition and community structure of the heterotrophic straminipiles and true zoosporic fungi varied in spatial distribution and exhibited seasonal variations, probably influenced by particular abiotic water characteristics, sampling site and season. Sites which directly receive either treated sewage water or industrial effluents were the poorest in straminipiles and true zoosporic fungi, and can be regarded as stressful environments where some abiotic parameters were excessive. Seasonality and biodiversity of the surveyed organisms are mainly dependent on water temperature, conductivity, most of the determined cations and anions, but pH did not exhibit any considerable impact. It is assumed that the existence of some fungal taxa at polluted sites may have a potential source of fungi beneficial for bioremediation and xenobiotic transformation.
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