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Changes in the algal composition and water quality of the Sundays River, Karoo, South Africa, from source to estuary

Changes in the algal composition and water quality of the Sundays River, Karoo, South Africa,... A first survey was done on algae present in the Sundays River from its source to its confluence with the sea. Species found in the upstream sections of the river included indicators of good water quality, but the quality deteriorated downstream with peaks in algal abundance being ascribed to peaks in nutrient concentrations. Cyanobacteria and euglenoids were present in the upper and middle reaches of the river, but were absent downstream. Dinoflagellates became more important downstream, especially in the estuary. Dominant species, reaching high concentrations along the river, included Nitzschia frustulum, Nitzschia capitellata, Carteria klebsii, Chlorella vulgaris and Anabaena species. The presence of the diatom Eolimna comperei is a first record of its occurrence in South Africa. The Sundays River can be described as a brackish, hard water system with high nutrient concentrations in certain sections. The most important contributors to high nutrient concentrations were point sources in the vicinity of towns along the river banks, as well as diffuse sources contributing to high nitrogen concentrations in the fertile Sundays River valley. Increasing salinities were due to pollution, evaporation and agricultural activities in the valley. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Journal of Aquatic Science Taylor & Francis

Changes in the algal composition and water quality of the Sundays River, Karoo, South Africa, from source to estuary

Janse van Vuuren, S; Taylor, JC
African Journal of Aquatic Science , Volume 40 (4): 19 – Dec 16, 2015
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19 pages

Changes in the algal composition and water quality of the Sundays River, Karoo, South Africa, from source to estuary

Abstract

A first survey was done on algae present in the Sundays River from its source to its confluence with the sea. Species found in the upstream sections of the river included indicators of good water quality, but the quality deteriorated downstream with peaks in algal abundance being ascribed to peaks in nutrient concentrations. Cyanobacteria and euglenoids were present in the upper and middle reaches of the river, but were absent downstream. Dinoflagellates became more important downstream,...
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Publisher
Taylor & Francis
Copyright
© 2015 NISC (Pty) Ltd
ISSN
1727-9364
eISSN
1608-5914
DOI
10.2989/16085914.2015.1103695
Publisher site
See Article on Publisher Site

Abstract

A first survey was done on algae present in the Sundays River from its source to its confluence with the sea. Species found in the upstream sections of the river included indicators of good water quality, but the quality deteriorated downstream with peaks in algal abundance being ascribed to peaks in nutrient concentrations. Cyanobacteria and euglenoids were present in the upper and middle reaches of the river, but were absent downstream. Dinoflagellates became more important downstream, especially in the estuary. Dominant species, reaching high concentrations along the river, included Nitzschia frustulum, Nitzschia capitellata, Carteria klebsii, Chlorella vulgaris and Anabaena species. The presence of the diatom Eolimna comperei is a first record of its occurrence in South Africa. The Sundays River can be described as a brackish, hard water system with high nutrient concentrations in certain sections. The most important contributors to high nutrient concentrations were point sources in the vicinity of towns along the river banks, as well as diffuse sources contributing to high nitrogen concentrations in the fertile Sundays River valley. Increasing salinities were due to pollution, evaporation and agricultural activities in the valley.

Journal

African Journal of Aquatic Science – Taylor & Francis

Published: Dec 16, 2015

Keywords: algae; cyanobacteria; diatoms; indicators; nitrogen; phosphorus; salinity; water chemistry

References

  • Community composition, toxigenicity, and environmental conditions during a cyanobacterial bloom occurring along 1,100 kilometres of the Murray River
  • The diatoms of the Sundays and Great Fish rivers in the Eastern Cape Province of South Africa
  • Sundays River Estuary, Algoa Bay, Eastern Cape
  • Epipelic diatoms in the estuaries of South Africa
  • The ichthyofauna of the Sundays Estuary, South Africa, with particular reference to the juvenile marine component
  • Fire and chemistry of a South African mountain stream
  • Population dynamics of certain Simuliidae in the Sundays and Fish rivers
  • Seasonal succession of phytoplankton in Rooseveld Lake, Arizona
  • The effect of increased salinity on diversity and abundance of diatoms
  • Diatomées invasives exotiques ou rares en France: principales observations effectuées au cours des dernières décennies
  • Endocrine and reproductive dysfunction in men associated with occupational inorganic lead intoxication
  • Nutrient enrichment studies in a coastal plain estuary: phytoplankton growth in large-scale continuous cultures
  • Water temperature and riverine ecosystems: an overview of knowledge and approaches for assessing biotic response, with special reference to South Africa
  • The nutrient status of South African rivers: concentrations, trends and fluxes from the 1970s to 2005
  • Nutrients, light and phytoplankton succession in a temperate estuary (the Guadiana, south-western Iberia)
  • Use of cyanobacteria to assess water quality in running waters
  • Management of the water resources of the Republic of South Africa
  • The pathway to noxious cyanobacteria blooms in lakes: the food web as the final turn
  • The nutrient status of the Sundays River estuary
  • Recent findings regarding non-native or poorly known diatom taxa in north-western Italian rivers
  • Do cyanobacteria dominate in eutrophic lakes because the fix atmospheric nitrogen?
  • Blue-green algae (cyanobacteria) as indicators of water quality in two Spanish rivers
  • Spatial and temporal variation of resource limitation in Chesapeake Bay
  • Cultural eutrophication in the Choptank and Patuxent estuaries of Chesapeake Bay
  • Ecology of the Sundays River
  • Ecology of the Sundays River
  • N:P ratios, light limitation and cyanobacterial dominance in a subtropical lake impacted by non-point source nutrient pollution
  • Phytoplankton from natural water bodies of the Patagonian Plateau
  • Comparative morphology of the feeding appendages of four mesozooplankton species in the Sundays River estuary
  • Plankton distribution and abundance in the Sundays River estuary, South Africa, with comments on potential feeding interactions
  • The response of microalgal biomass and community composition to environmental factors in the Sundays Estuary
  • Algal fact sheet
  • Diatom assemblages distribution in Catalan rivers, NE Spain, in relation to chemical and physiographical factors
  • Free-living cyanobacteria and their nitrogen fixation activity in a high arctic environment
  • The inverted microscope method of estimating algal numbers and the statistical basis of estimations by counting
  • Mixing and circulation in the Sundays River Estuary
  • Diatoms as indicators of water quality and ecological status: sampling, analysis and some ecological remarks
  • Phytoplankton distribution in the inner Kara Sea: a comparison of three summer investigations
  • Estudo das diatomáceas bênticas em sistemas lóticos de Portugal Continental
  • Temporal alternation between light- and nutrient limitation of phytoplankton production in a coastal plain estuary
  • The salinity of rivers
  • Lake sediments: algal availability of Lake Burley Griffin sediment phosphorus
  • Nitrogen, phosphorus, and eutrophication in the coastal marine environment
  • SANS [South African National Standard] 241-1. Drinking water. Part 1: Microbial, physical, aesthetic and chemical determinants
  • A comparison of selected ecosystem attributes of three South African estuaries with different freshwater inflow regimes, using network analysis
  • Evolution of phosphorus limitation in lakes
  • The impact of intensive dairy farming activities on river quality: the Eastern Cleddau catchment study
  • Influence of pH on the toxicity of ammonia to Chironomus tentans and Lumbriculus variegatus. Environmental Toxicology and Chemistry
  • Orange River Project: working group for ORP hydrochemistry and hydrobiology
  • Epilithic diatoms (Bacillariophyceae) as indicators of water quality in the Upper Lerma River, Mexico
  • The distribution of wetlands in the south-western Cape Province, South Africa
  • Low nitrogen to phosphorus ratios favor dominance by blue-green algae in lake phytoplankton
  • On the phosphorus limitation paradigm for lakes
  • The dynamics of larval fish and zooplankton assemblages in the Sundays Estuary, South Africa
  • Recommendations for the collection, preparation and enumeration of diatoms from riverine habitats for water quality monitoring in South Africa
  • USGS water quality information
  • Neue Wege in der quantitativen Erfassung des Planktons (Mit besondere Beriicksichtigung des Ultraplanktons)
  • Zur Vervollkommnung der quantitativen Phytoplankton-Methodik
  • Geographic analysis of thermal equilibria: a conceptual model for evaluating the effects of natural and modified thermal regimes on aquatic insect communities
  • The permeability of blue-green algal gas-vacuole membranes to gas
  • Thermal characteristics of running waters
  • The effects of instream barriers on the distribution of migratory marine- spawned fishes in the lower reaches of the Sundays River, South Africa
  • Studies on the acute toxicity of pollutants to freshwater macroinvertebrates. 1. Cadmium
  • The effect of nitrogen fertilizer of bankside soil on the chemical characteristics of the River Nida (Southern Poland) with special regard to dissolved organic matter