Aerophytic Cyanophyceae (Cyanobacteria) from Some Cairo Districts, Egypt

El-Gamal, Ahmed

doi:10.3923/pjbs.2008.1293.1302

Cited by 18 publications

(16 citation statements)

References 2 publications

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“…The dominance of cyanobacteria in aeroalgal sampling has been highlighted in other studies conducted in Cairo, Egypt (El-Gamal, 2008) and Varanasi, India (Sharma et al, 2006a). In the Cairo study, the aeroalgal flora consisted solely of cyanobacteria, with a record of 13 species (El-Gamal, 2008). Similar to the findings of the present study, genera such as Nostoc and Phormidium were found to be the dominant airborne algae.…”

Section: Discussionsupporting

confidence: 89%

“…Results showed that cyanobacteria were the dominant airborne algae within the township of Bukit Jalil. The dominance of cyanobacteria in aeroalgal sampling has been highlighted in other studies conducted in Cairo, Egypt (El-Gamal, 2008) and Varanasi, India (Sharma et al, 2006a). In the Cairo study, the aeroalgal flora consisted solely of cyanobacteria, with a record of 13 species (El-Gamal, 2008).…”

Section: Discussionmentioning

confidence: 73%

“…For instance, 29 genera of airborne cyanobacteria and seven genera of chlorophytes were recorded from the Asian region (Sharma et al, 2007). Twentyfive airborne species of cyanobacteria including Chroococcus limneticus Lemmermann, Lyngbya lagerheimii (Mobius) Gomont, and Phormidium ambiguum Gomont were recorded in Cairo, Egypt (El Gamal, 2008). Aerobiological studies conducted in and around Delhi, India, found that the air is rich in algal flora, especially cyanobacteria (Mittal et al, 1979b).…”

mentioning

confidence: 99%

“…Heavy rainfall can decrease atmospheric algae concentration by rainout or washout effects (Burge & Rogers, 2000). Air pollutants such as sulphur dioxide (SO 2 ) and nitrogen dioxide (NO 2 ) are also known to affect the distribution of airborne algae (El Gamal, 2008).…”

mentioning

confidence: 99%

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Occurrence of airborne algae within the township of Bukit Jalil in Kuala Lumpur, Malaysia

Chu

Ambu

2011

Grana

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 73%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Occurrence of airborne algae within the township of Bukit Jalil in Kuala Lumpur, Malaysia

Chu

Ambu

2011

Grana

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“…Similar observations were made in Cairo, Egypt. The species Chroococcus limenticus, Lyngbya lagerheimii and Schizothrix purpurascens appeared in all seasons (El-Gamal, 2008). Genitsari et al (2011) recently published an overview of taxa of airborne algae and cyanobacteria found in aerobiological studies.…”

Section: Algae and Cyanobacteriamentioning

confidence: 99%

Primary biological aerosol particles in the atmosphere: a review

Després¹,

Huffman

Burrows³

et al. 2012

Tellus B: Chemical and Physical Meteorology

1,193

1,114

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A B S T R A C T Atmospheric aerosol particles of biological origin are a very diverse group of biological materials and structures, including microorganisms, dispersal units, fragments and excretions of biological organisms. In recent years, the impact of biological aerosol particles on atmospheric processes has been studied with increasing intensity, and a wealth of new information and insights has been gained. This review outlines the current knowledge on major categories of primary biological aerosol particles (PBAP): bacteria and archaea, fungal spores and fragments, pollen, viruses, algae and cyanobacteria, biological crusts and lichens and others like plant or animal fragments and detritus. We give an overview of sampling methods and physical, chemical and biological techniques for PBAP analysis (cultivation, microscopy, DNA/RNA analysis, chemical tracers, optical and mass spectrometry, etc.). Moreover, we address and summarise the current understanding and open questions concerning the influence of PBAP on the atmosphere and climate, i.e. their optical properties and their ability to act as ice nuclei (IN) or cloud condensation nuclei (CCN). We suggest that the following research activities should be pursued in future studies of atmospheric biological aerosol particles: (1) develop efficient and reliable analytical techniques for the identification and quantification of PBAP; (2) apply advanced and standardised techniques to determine the abundance and diversity of PBAP and their seasonal variation at regional and global scales (atmospheric biogeography); (3) determine the emission rates, optical properties, IN and CCN activity of PBAP in field measurements and laboratory experiments; (4) use field and laboratory data to constrain numerical models of atmospheric transport, transformation and climate effects of PBAP.

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Desert Dust as a Vector for Cyanobacterial Toxins

Metcalf

Chatziefthimiou

Souza

et al. 2021

The Arabian Seas: Biodiversity, Environmental Challenges and Conservation Measures

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Background: Brief Description of Deserts and Dust Storm FrontsDrylands, which make up 41-45% of the Earth's land area, are inhabited by 31% of the world's human population and are characterized by climatic forces which shape the physical environment and its biological life (UNCCD 2012;Prăvălie 2016; IPCC 2017;Maliva and Missimer, 2012). Although deserts were conceptualized singularly in the context of temperature maxima or lack of precipitation, aridity indices (AI) which take into consideration annual precipitation (P) and evapotranspiration (ET) potential are more accurate and efficient in describing deserts (UNESCO 1979; IPCC 2007 IPCC , 2017. This is because ET has an inherent co-linearity with additional climatic forces including temperature, wind speed, and Global Horizontal Irradiation (GHI). The water cycle, which influences soil type, vegetation cover and species abundance is factored in as well through incorporation of P in the aridity index (UNESCO 1979; IPCC 2007 IPCC , 2017.The Arabian Seas are surrounded by deserts in the hyper-arid (AI < 0.0) to arid (0.03 < AI < 0.20) continuum (MEA 2005; UNESCO 1979; UNCCD 2012), of yearly sums of GHI levels (2118-2775 kWh/m 2 ) comparable only to the Atacama (Chile and Peru), the driest hot desert in the world (Knight 2016; SSE 2017). These deserts also experience irregular rainfall of up to 80 mm on average per annum (hyper-arid) and between 80 and 350 mm on average per annum (arid), mainly occurring during the winter months when temperatures are low, with the exception

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Aerophytic Cyanophyceae (Cyanobacteria) from Some Cairo Districts, Egypt

Cited by 18 publications

References 2 publications

Occurrence of airborne algae within the township of Bukit Jalil in Kuala Lumpur, Malaysia

Occurrence of airborne algae within the township of Bukit Jalil in Kuala Lumpur, Malaysia

Primary biological aerosol particles in the atmosphere: a review

Desert Dust as a Vector for Cyanobacterial Toxins

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