Relationship Between Total Chlorophyll and Phytoplankton Individuals of Rosetta Branch of River Nile, Egypt

Abstract

Total chlorophyll concentrations of the phytoplanktonic samples of Rosetta branch of the River Nile at the stations before Edfina barrage (from station I to V) and after Edfina barrage (stations VI and VII) were studied during two successive years from August 2006 to April 2008. At all stations, the total chlorophyll contents of the identified algae and the maximum quantitative algal individuals were found maximum during summer 2007. Peak periods of total chlorophyll coincided with peak periods of the stations that recorded high algal biomass. Phytoplankton in Rosetta branch of the river Nile at the most studied stations (I, II, IV, V and VI) had chloro-character particularly in summer 2007. A positive correlation was observed between the fluctuations of total chlorophyll contents of the phytoplankton and those of total number of individuals at all investigated stations of Rosetta branch. DOI: http://dx.doi.org/10.3126/eco.v18i0.9392Ecoprint: An International Journal of EcologyVol. 18, 2011 Page: Uploaded date: 12/20/2013

Quality assessment of water along Suez Freshwater Canal and drinking water in Suez Governorate, Egypt

“…These results were in agreement with El-Hady and Hussian (2012) who reported that the peak algal biomass in River Nile was in autumn, while the highest cell density occurred in spring. Chlorophyll a showed positive correlations with phytoplankton cell density with correlations of 0.746, these results were in agreement with Shaaba et al (2011) who reported that there was a positive relation observed between the fluctuations of total chlorophyll contents of the phytoplankton and those of total number of individuals at all investigated sites of Rosetta branch in River Nile. Figure 5 showed that the total algal count varied between 2500 at site I and 31236.67 cell/l at site VI.…”

Biochemical profile of phytoplankton and its nutritional aspects in some khors of Lake Nasser, Egypt

“…3). Chlorophyll a content of algal cells is influenced by external and internal factors as nutrient concentrations, light factor, algal growth, species composition and cell size [64]. Accumulation of fatty acids was accompanied by decline in chlorophyll content in the green microalga Parietochloris incisa [65].…”

Seminavis aegyptiaca sp. nov., a new amphoroid diatom species from estuary epilithon of the River-Nile Damietta Branch, Egypt

“…Considerable morphotaxonomic studies carried out on the diatom flora of different Egyptian inland-water habitats, including the main basin and branches of the Nile River (e.g., Foged 1980;Shaaban 1994;Hamed 2008;Shaaban et al 2012;El-Otify & Iskaros 2015;Abdel-Satar et al 2017;El-Sheekh et al 2018), did not use scanning electron microscopy (SEM), thus unintentionally neglecting ultrastructural details which play a crucial role in accurate species delimitation. As a consequence, very little information is available for Egypt on the diversity and autecology of diatoms belonging to Seminavis and other morphologically similar amphoroid taxa [e.g., Seminavis strigosa (Hustedt) Danieledis et Economou-Amilli as cited in Danielidis & Mann (2003) In this paper, using both light and scanning electron microscopy, we describe a new species within the genus Seminavis collected from the epilithon of the estuary of the Damietta Branch (the Nile River, Egypt), during our recent in-depth floristic-taxonomic and bioassessment studies on the algal communities in this pivotal but highly-impacted habitat.…”