A Key for Identification and Distribution of Freshwater Cyclopoida (Copepoda, Crustacea) of Egypt

Hussein, Mostafa A.; Obuid-Allah, Ahmad H.; Mohammad, A.H.

doi:10.21608/ejabf.1999.3451

Cited by 3 publications

(1 citation statement)

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“…Phytoplankton species were identified according to the following manuals, keys and papers: [28][29][30][31][32][33][34][35][36][37][38][39][40]. In addition, zooplankton taxa were identified using the following principal taxonomic references: [41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57]. Furthermore, identification of zoobenthos were performed according to: [58,59] for insects; [60][61][62][63]; for identification of Oligochaetae: [64,65] for Mollusca; [66] was mainly used for identification of chironomid larvae.…”

Section: Phytoplankton Biomass Was Presented By Measurements Of Chlormentioning

confidence: 99%

Plankton and Zoobenthos in the Southern Region of the Nile in Egypt: Community Structure, Relative Abundance and Diversity

El-Otify

Iskaros

2018

AJOB

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Major biological parameters along with nutrient concentrations of the Nile in Upper Egypt were analyzed during 2007 for a better understanding of community structure and diversity of the main functional groups of organisms. The abundance of plankton and zoobenthos was followed seasonally. Altogether 168 taxa (85 phytoplankton, 43 zooplankton and 40 zoobenthos) were encountered from the Nile in Upper Egypt. The combined contribution of chironomid larvae, Mollusca and Oligochaetae represented the abundant groups of the Nile zoobenthos throughout the study period. The results of this study suggested that the sediment contents of organic matter and CaCO 3 , as well as water temperature and NO 3-N concentrations, seemed to be important in determining the abundance and biomass of zoobenthos. Most importantly, the results of this study will provide valuable information for river management. Simultaneously; alpha, beta, gamma and Shannon (H̀) diversities of these communities were measured. Alpha and gamma diversities for

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Section: Phytoplankton Biomass Was Presented By Measurements Of Chlormentioning

confidence: 99%

Plankton and Zoobenthos in the Southern Region of the Nile in Egypt: Community Structure, Relative Abundance and Diversity

El-Otify

Iskaros

2018

AJOB

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Decline in zooplankton diversity in the Damietta Branch of the Nile River, Egypt: a comparative study with a 24-year span

Helal¹

2006

SIL Proceedings, 1922-2010

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Water quality and potamoplankton evaluation of the Nile River in Upper Egypt

El-Otify

Iskaros

2015

Acta Limnol. Bras.

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Aim: The composition, abundance, community structure of potamoplankton and major physical and chemical variables of the Nile water in Upper Egypt were investigated to assess its status in different seasons during 2007.MethodsWater samples were collected seasonally during 2007 from six investigated sites from variable depths at levels of 0, 2.5 and 5 m. The area of this investigation is defined as the southern 120 Km of the main stream of the Nile in Upper Egypt (24° 04’ – 25° 00’ latitudes and 32° 51’ – 32° 54’ longitudes), downstream of Aswan Old Dam.ResultsAltogether, 121 potamoplankton species, of which 85 related to phytoplankton and 36 appertaining to zooplankton were recorded. Most numerous phytoplankton were Chlorophyceae (42 species) followed by Bacillariophyceae (30 species). Cyanobacteria and Dinophyceae were less numerous with only 11 and 2 species, respectively. Zooplankton species were mainly belonging to three systematic groups namely; Rotifera (24 species), Copepoda (3 species) and Cladocera (9 species). Besides, other rare zooplankton including Platyhelminthes, Nemata and Ciliophora were sparsely encountered. The main hydrological conditions characterizing the investigated area include water level fluctuations (˂82 - ˃85 m above sea level), relatively high current velocity (0.8 - 1.3 m sec–1) and disposal of wastewater. Plankton populations were variably but rather weakly dependent on the major nutrients due to their excessive availability in accessible form for uptake by the producers. For phytoplankton, the community structure was categorized in relation to temperature, pH, SO42– and Mg2+. For zooplankton, the community structure was categorized in relation to conductivity as well as Mg2+. Sampling intervals were inadequate to demonstrate the existing successional pattern of the Nile potamoplankton community. Alterations in the phytoplankton community structure accompanied changes in water temperature represented by the alternate dominance between diatoms and cyanobacteria, while zooplankton community was always dominated by rotifers. Phytoplankton populations were numerically more abundant in autumn and zooplankton peaked in spring.ConclusionsWastewater disposal restricted the abundance of the Nile zooplankton assemblages mainly due to the numerical decline of Rotifera and Cladocera. Otherwise, wastewater did not exert major limits for phytoplankton. The data obtained in this investigation will be crucial to understand potamoplankton regulation and contribute to the knowledge regarding the Limnology of the Nile basin.

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A Key for Identification and Distribution of Freshwater Cyclopoida (Copepoda, Crustacea) of Egypt

Cited by 3 publications

References 0 publications

Plankton and Zoobenthos in the Southern Region of the Nile in Egypt: Community Structure, Relative Abundance and Diversity

Plankton and Zoobenthos in the Southern Region of the Nile in Egypt: Community Structure, Relative Abundance and Diversity

Decline in zooplankton diversity in the Damietta Branch of the Nile River, Egypt: a comparative study with a 24-year span

Water quality and potamoplankton evaluation of the Nile River in Upper Egypt

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