The Development of Plankton in Relation to Hydrological Regime in the Blue Nile

Tailing, J. F.; Rzóska, Julian

doi:10.2307/2258415

Cited by 165 publications

(81 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, predation may not be the only mechanism resulting in mortality. Mechanical damage may result in the loss of zooplankton (Hynes 1970;Talling and Rzoska 1967), and, in contrast to predation mortality, it is likely to increase with increasing velocity. Seasonal variations in zooplankton mortality rates thus seem likely.…”

Section: Discussionmentioning

confidence: 99%

“…The influence of reservoirs on the development of zooplankton in rivers is well known, especially for highly regulated systems such as the Nile (Rzoska et al 1955;Talling and Rzoska 1967;Brook and Rzoska 1954;Rzoska 1976) and the Murray (Shiel and Walker 1984;Shiel et al 1982). Impoundment has altered the orig-…”

Section: Zooplanktonmentioning

confidence: 99%

“…Reproduction of zooplankton in the llowing waters can increase plankton abundance (Talling and Rzoska 1967) but typically only at low flow; high current velocities appear to inhibit reproduction (Rzoska 1978). A role for resting stages deposited on the river bottom has also been proposed (Moghraby 1977), but it has not been shown to be of significance in unregulated rivers.…”

Section: Acknowledgmentsmentioning

confidence: 99%

See 2 more Smart Citations

Zooplankton abundance in the lower Orinoco River, Venezuela

Saunders

Lewis

1989

Limnology & Oceanography

View full text Add to dashboard Cite

Zooplankton were sampled quantitatively in the lower Orinoco River and three major tributaries (Apure, Caura, Caroni). Dominant taxa were euplanktonic, which suggests origin from standing waters. In the Orinoco, densities for rotifers (mean, 7.6 ind. liter -I) were greater than those for cladocerans (0.9 ind. liter-I) or copepods (1.2 ind. liter-'), but cladocerans accounted for more than half oftotal biomass (0.5 kg C liter -I). Average tributary contributions to zooplankton transport in the lower Orinoco (873 kg C d-l) were proportional to their average discharges. Extensive fringing floodplain along the lower Orinoco contributed very little to total transport. At low water in the Orinoco, when there was no contact with the floodplain, the transport of copepods (mainly nauplii) and Bosmina increased downstream by more than could be ascribed to additions from the tributaries or to reproduction in transit. These zooplankton appear to originate along the river margin, within the channel, and arc probably significant as an energy input for food webs in the channel and as an inoculum to floodplain habitats at the time of inundation.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Zooplanktonmentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

See 1 more Smart Citation

Zooplankton abundance in the lower Orinoco River, Venezuela

Saunders

Lewis

1989

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Several mixed communities have been resolved into coexisting species with contrasting (much or little) annual variation, interpreted on a wide logarithmic scale (Talling 1966, Ganf 1974b). In the Nile, planktonic systems of seasonal change, reviewed by Talling et al (2009), have been interpreted rather exceptionally from both temporal and repeated longitudinal sequences of observations (Brook and Rzóska 1954, Rzóska et al 1955, Prowse and Talling 1958, Talling and Rzóska 1967, Hammerton 1972, Sinada and Abdel Karim 1984, Habib and Aruga 1988, Mohammed et al 1989. This combination has shown a downstream spread from year to year in the abundance of one cyanoprokaryote (blue-green) in the Blue Nile during the 1960s (Hammerton 1972) and used to emphasise the probable significance of "massive inocula" for species transmission and spread in the Nile system (Talling 2010).…”

Section: Plankton Dynamicsmentioning

confidence: 99%

“…Quantitative work on zooplankton populations includes the consequence of cycles of reservoir storage (Nile system: Rzóska et al 1955, Talling andRzóska 1967), of evaporative contraction and its reversal (L. Chilwa: Kalk et al 1979), sequences in lakes with minimal environmental seasonality (L. George: Burgis et al 1973;L. Naivasha: Mavuti 1990), and in those with marked temperature seasonality (L. Chad: Saint-Jean 1983).…”

confidence: 99%

Some distinctive subject contributions from tropical Africa to fundamental science of inland waters

Talling¹

2011

View full text Add to dashboard Cite

A short account is given of some features that are unique or extensively developed or intensely studied in tropical African water-bodies, and which are of fundamental limnological significance. They concern the origin and persistence of lakes and rivers; local evolution (endemism) and dispersal of species; cyclic lake stratification in relation to latitude and climate; salinity series and nutrient balance; plankton dynamics; aquatic food chains that are simplified and quantifiable or with major recent change; colonisation of new or transient water bodies by extensively invasive species; and the significance of temperature difference and absolute magnitude as ecological factors.

show abstract

Field and Laboratory Studies on Nile Phytoplankton in Egypt IV. Phytoplankton of Aswan High Dam Lake (Lake Nasser)

Mohammed

Ahmed

El-Otify

1989

Intl Review of Hydrobiology

View full text Add to dashboard Cite

Seasonal, local and monthly vertical variations in chlorophyll a concentration and in qualitative and quantitative counts in Aswan High Dam Lake (AHDL) phytoplankton were followed from March 1982 to February 1984. The chlorophyll a values correlated more or less with the total phytoplankton counts. Total algal counts exhibited considerable local variations in the different seasons and tended t o decrease in the most southern part of AHDL, especially during the flood period. The temporal course of algal development showed a n almost inverse trend to that of dissolved nitrate-nitrogen. The possibility of nitrogen limitation of algal growth was verified.Diatoms and blue-green algae alternated in the dominance of the phytoplankton community. The genera Cydotella and Anabaenopsis respectively were the most predominant genera among the diatoms and blue-greens and consequently in the phytoplankton community.

show abstract

The Development of Plankton in Relation to Hydrological Regime in the Blue Nile

Cited by 165 publications

References 33 publications

Zooplankton abundance in the lower Orinoco River, Venezuela

Zooplankton abundance in the lower Orinoco River, Venezuela

Some distinctive subject contributions from tropical Africa to fundamental science of inland waters

Field and Laboratory Studies on Nile Phytoplankton in Egypt IV. Phytoplankton of Aswan High Dam Lake (Lake Nasser)

Contact Info

Product

Resources

About