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Journal articles on the topic 'Estuarine ecology – South Africa – Swartvlei'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Russell, IA. "Spatio-temporal variability of five surface water quality parameters in the Swartvlei estuarine lake system, South Africa." African Journal of Aquatic Science 40, no. 2 (2015): 119–31. http://dx.doi.org/10.2989/16085914.2015.1029868.

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2

Mead, A., J. T. Carlton, C. L. Griffiths, and M. Rius. "Introduced and cryptogenic marine and estuarine species of South Africa." Journal of Natural History 45, no. 39-40 (2011): 2463–524. http://dx.doi.org/10.1080/00222933.2011.595836.

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3

Dalu, T., JB Adams, JC Taylor, et al. "Overview and status of estuarine microphytobenthos ecological research in South Africa." African Journal of Marine Science 40, no. 1 (2018): 1–12. http://dx.doi.org/10.2989/1814232x.2018.1431309.

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4

Harrison, Trevor D., and Alan K. Whitfield. "Estuarine Typology and the Structuring of Fish Communities in South Africa." Environmental Biology of Fishes 75, no. 3 (2006): 269–93. http://dx.doi.org/10.1007/s10641-006-0028-y.

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5

Sheppard, Jill N., and C. Fiona MacKay. "Using Historic Land Cover Data to Predict Estuarine Macrobenthos Characteristics in South Africa." Journal of Coastal Research 34, no. 5 (2018): 1116. http://dx.doi.org/10.2112/jcoastres-d-16-00160.1.

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6

O'Callaghan, M. "The ecology of the False Bay estuarine environments, Cape, South Africa. 1. The coastal vegetation." Bothalia 20, no. 1 (1990): 105–11. http://dx.doi.org/10.4102/abc.v20i1.903.

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The vegetation in and around eleven estuaries flowing into False Bay was surveyed during 1980 and 1981. Use was made of colour aerial photographs and a combination of dominance and phytosocioiogical techniques. Of the communities established, three are aquatic and four are described as emergent or wetlands. Of the terrestrial communities, five are described as fynbos and four occur on coastal sands. One community consists solely of alien plants. The communities thus classified generally compare well with those discussed by other workers in the area. However, differences due to the destruction

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7

Whitfield, A. "Predation on small juvenile fishes in shallow estuarine nursery areas: Reply to Baker & Sheaves (2021)." Marine Ecology Progress Series 662 (March 18, 2021): 209–14. http://dx.doi.org/10.3354/meps13678.

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The key criticism by Baker & Sheaves (2021; Mar Ecol Prog Ser 662:205-208) of the Whitfield (2020; Mar Ecol Prog Ser 649:219-234) estuarine littoral predation paradigm review is that shallow water fish nursery habitats contain abundant predator assemblages which may create high predation pressure on the juvenile fish cohorts that occupy these areas. The primary arguments supporting Baker & Sheaves’ criticism arise from a series of papers published by them on piscivorous fish predation in certain tropical Australian estuaries. The counter-argument that shallow littoral areas in estuarie

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8

Froneman, P. William, and Ross N. Cuthbert. "Ratio-independent prey preferences by an estuarine mysid." Journal of Plankton Research 42, no. 3 (2020): 398–401. http://dx.doi.org/10.1093/plankt/fbaa024.

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Abstract The present study quantified prey preferences by adult males and females of the mysid Mesopodopsis wooldridgei fed the calanoid copepods Pseudodiaptomus hessei and Paracartia longipatella at varying proportions. Both sexes of M. wooldridgei showed a lack of prey switching and a strong preference for the smaller, less active P. longipatella irrespective of density. Given a lack of low-density prey refuge, this finding may have important implications for the distribution of P. longipatella in estuaries along the eastern seaboard of South Africa. Results of the present study contribute t

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9

Pradervand, P., L. E. Beckley, B. Q. Mann, and P. V. Radebe. "Assessment of the Linefishery in Two Urban Estuarine Systems In Kwazulu-natal, South Africa." African Journal of Marine Science 25, no. 1 (2003): 111–30. http://dx.doi.org/10.2989/18142320309504004.

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10

Collocott, SJ, L. Vivier, and DP Cyrus. "Prawn community structure in the subtropical Mfolozi–Msunduzi estuarine system, KwaZulu-Natal, South Africa." African Journal of Aquatic Science 39, no. 2 (2014): 127–40. http://dx.doi.org/10.2989/16085914.2014.925419.

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11

Ngqulana, S. G., R. K. Owen, L. Vivier, and D. P. Cyrus. "Benthic faunal distribution and abundance in the Mfolozi–Msunduzi estuarine system, KwaZulu-Natal, South Africa." African Journal of Aquatic Science 35, no. 2 (2010): 123–33. http://dx.doi.org/10.2989/16085914.2010.497645.

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12

Everett, BI, and ST Fennessy. "Assessment of recreational boat-angling in a large estuarine embayment in KwaZulu-Natal, South Africa." African Journal of Marine Science 29, no. 3 (2007): 411–22. http://dx.doi.org/10.2989/ajms.2007.29.3.9.339.

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13

Taylor, Ricky, Janine B. Adams, and Sylvi Haldorsen. "Primary habitats of the St Lucia Estuarine System, South Africa, and their responses to mouth management." African Journal of Aquatic Science 31, no. 1 (2006): 31–41. http://dx.doi.org/10.2989/16085910609503869.

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14

Radloff, J., AN Hodgson, and L. Claassens. "Settlement of the invasive mussel Mytilus galloprovincialis in a warm temperate estuarine embayment in South Africa." African Journal of Aquatic Science 46, no. 2 (2021): 206–14. http://dx.doi.org/10.2989/16085914.2020.1842170.

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15

O'Callaghan, M. "The ecology of the False Bay estuarine environments, Cape, South Africa. 2. Changes during the last fifty years." Bothalia 20, no. 1 (1990): 113–21. http://dx.doi.org/10.4102/abc.v20i1.904.

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Aerial photographs taken between 1936 and 1987 of the eleven rivers flowing into False Bay were studied. Various techniques were used to obtain quantitative values and value judgements for the changes that had taken place. It was found that large increases in industrial, residential, recreational areas and alien plant cover have taken place at the expense of open sand and natural vegetation types. The rivers along the eastern shore of the Bay are relatively undisturbed. Those along the western shore are more disturbed but still contain some noteworthy environments. The most detrimental changes

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16

Harris, SA, and DP Cyrus. "Laval and Juvenile Fishes in the Surf Zone Adjacent to the St Lucia Estuary Mouth, KwaZulu-Natal, South Africa." Marine and Freshwater Research 47, no. 2 (1996): 465. http://dx.doi.org/10.1071/mf9960465.

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Composition, seasonality and developmental stages of larval and juvenile fish in the surf zone adjacent to the St Lucia Estuary mouth, KwaZulu-Natal, were investigated. Samples were collected monthly, from February 1992 to January 1993, at six stations along the beach north of the estuary mouth. A 24-h study was also undertaken in the surf zone when the estuary mouth was closed. In the 12-month study a total of 2931 larvae, representing 88 taxa and 47 families, was collected. The most abundant families were the Sparidae, Haemulidae, Ambassidae, Tripterygiidae and Chanidae, together comprising

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17

Jerling, HL, and DP Cyrus. "Mesozooplankton community structure changes in the Mfolozi–Msunduzi estuarine system, South Africa, during contrasting river flow conditions." African Journal of Aquatic Science 41, no. 3 (2016): 309–17. http://dx.doi.org/10.2989/16085914.2016.1184129.

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18

Izegaegbe, JI, L. Vivier, and HMM Mzimela. "Macrobenthic community structure of the Mhlathuze Estuary, a permanently open estuarine embayment in KwaZulu-Natal, South Africa." African Journal of Aquatic Science 45, no. 1-2 (2020): 95–107. http://dx.doi.org/10.2989/16085914.2020.1719818.

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19

Cowley, PD, A.-R. Childs, and RH Bennett. "The trouble with estuarine fisheries in temperate South Africa, illustrated by a case study on the Sundays Estuary." African Journal of Marine Science 35, no. 1 (2013): 117–28. http://dx.doi.org/10.2989/1814232x.2013.789079.

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20

Wooldridge, T. H. "Characterisation of the mesozooplankton community in response to contrasting estuarine salinity gradients in the Eastern Cape, South Africa." African Journal of Aquatic Science 35, no. 2 (2010): 173–84. http://dx.doi.org/10.2989/16085914.2010.490987.

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21

Carrasco, N. K., R. Perissinotto, and A. Whitehead. "Agricultural impact on the pelagic ecosystem of the small temporarily open/closed Seteni Estuary, South Africa." Marine and Freshwater Research 64, no. 10 (2013): 938. http://dx.doi.org/10.1071/mf12310.

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The encroachment of agriculture and human population is placing increasing levels of stress on estuarine ecosystems worldwide. The catchment of the Seteni Estuary, a small temporarily open/closed estuary in South Africa, has been under extensive sugar cultivation for over 60 years. The present study reports on the impact of agricultural practices on the structure and dynamics of its pelagic communities over a 1-year period, from April 2008 to March 2009. The physico-chemical characteristics of the system were strongly linked to seasonality, with the system exhibiting a distinct open- and close

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22

Hodgson, AN, L. Claassens, and S. Kankondi. "Shell morphometrics and growth rate of the invasive bivalve mollusc Mytilus galloprovincialis in the Knysna estuarine embayment, South Africa." African Journal of Aquatic Science 43, no. 4 (2018): 367–74. http://dx.doi.org/10.2989/16085914.2018.1539647.

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23

James, N., NG Hall, LE Beckley, BQ Mann, and WD Robertson. "Status of the estuarine-dependent riverbreamAcanthopagrus berda(Sparidae) harvested by the multi-sectoral fishery in Kosi Bay, South Africa." African Journal of Marine Science 30, no. 1 (2008): 45–53. http://dx.doi.org/10.2989/ajms.2008.30.1.5.455.

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24

Mann, Bruce Q., and Pierre Pradervand. "Declining catch per unit effort of an estuarine-dependent fish, Rhabdosargus sarba (Teleostei: Sparidae), in the marine environment following closure of the St Lucia Estuarine System, South Africa." African Journal of Aquatic Science 32, no. 2 (2007): 133–38. http://dx.doi.org/10.2989/ajas.2007.32.2.4.201.

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25

Veldkornet, Dimitri Allastair, and Anusha Rajkaran. "Predicting Shifts in the Geographical Distribution of Two Estuarine Plant Species from the Subtropical and Temperate Regions of South Africa." Wetlands 39, no. 6 (2019): 1179–88. http://dx.doi.org/10.1007/s13157-019-01218-y.

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26

Snow, G. C., and J. B. Adams. "Relating microalgal spatial patterns to flow, mouth and nutrient status in the temporarily open/closed Mngazi estuary, South Africa." Marine and Freshwater Research 58, no. 11 (2007): 1032. http://dx.doi.org/10.1071/mf07016.

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The Mngazi estuary, a near pristine and wave-dominated estuary located on the subtropical east coast of South Africa, requires careful management to ensure that land use does not alter its ecological function. The present study investigated the quality and quantity of water in the estuary and related these to the microalgae. There was no evidence of a persistent elevated phytoplankton biomass in the region of the estuary where river water mixed with brackish estuarine water, even during periods when the estuary mouth was open. Nutrients that determined the microalgal distribution were likely t

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27

Vivier, L., D. P. Cyrus, R. K. Owen, and H. L. Jerling. "Fish assemblages in the Mfolozi–Msunduzi estuarine system, KwaZulu-Natal, South Africa, when not linked to the St Lucia mouth." African Journal of Aquatic Science 35, no. 2 (2010): 141–54. http://dx.doi.org/10.2989/16085914.2010.490984.

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28

Hutchings, K., and S. J. Lamberth. "Likely impacts of an eastward expansion of the inshore gill-net fishery in the Western Cape, South Africa: implications for management." Marine and Freshwater Research 54, no. 1 (2003): 39. http://dx.doi.org/10.1071/mf01209.

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Current South African government policy aims to create more equitable access to marine resources and there is pressure to increase the inshore gill-net fishing effort. At present, the gill-net fishery in the Western Cape is confined to the cool temperate west coast. In order to ascertain the potential catch if the fishery was to expand along the warm temperate south-west coast, a program of experimental netting was conducted. Estuarine and coastal marine sites were sampled bimonthly, using a range of commercial gill-nets (44–178 mm stretch-mesh). Although the target species, Liza richardsonii,

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29

Jerling, H. L., L. Vivier, D. P. Cyrus, and R. K. Owen. "Initial characterisation of the mesozooplankton community of the Mfolozi– Msunduzi estuarine system, KwaZulu-Natal, South Africa, during a low-flow period." African Journal of Aquatic Science 35, no. 2 (2010): 117–22. http://dx.doi.org/10.2989/16085914.2010.490985.

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30

Scharler, U. M., and D. Baird. "The nutrient status of the agriculturally impacted Gamtoos Estuary, South Africa, with special reference to the river-estuarine interface region (REI)." Aquatic Conservation: Marine and Freshwater Ecosystems 13, no. 2 (2003): 99–119. http://dx.doi.org/10.1002/aqc.500.

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31

Murray, Taryn S., Paul D. Cowley, Rhett H. Bennett, and Amber-Robyn Childs. "Fish on the move: connectivity of an estuary-dependent fishery species evaluated using a large-scale acoustic telemetry array." Canadian Journal of Fisheries and Aquatic Sciences 75, no. 11 (2018): 2038–52. http://dx.doi.org/10.1139/cjfas-2017-0361.

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Connectivity — movements of animals between and among numerous habitats — and the factors (rhythmic cycles and environmental variables) influencing connectivity of juvenile Lichia amia (Teleostei: Carangidae) were assessed in complementary acoustic telemetry studies in two geographically separated estuaries (620 km apart) in South Africa. The studies were conducted within a nationwide array of acoustic receivers moored in estuaries and coastal waters. Tagged fish in both the Kowie (n = 21) and Goukou (n = 17) estuaries displayed high levels of multiple habitat connectivity, with 81% and 76% vi

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32

Tweddle, GP, DP Cyrus, and L. Vivier. "Penaeid and carid community changes in the St Lucia estuarine lake system, South Africa, under low water level, extended closed periods and marine reconnection conditions." African Journal of Aquatic Science 41, no. 3 (2016): 251–66. http://dx.doi.org/10.2989/16085914.2016.1198886.

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33

Muir, David G., and Renzo Perissinotto. "Persistent Phytoplankton Bloom in Lake St. Lucia (iSimangaliso Wetland Park, South Africa) Caused by a Cyanobacterium Closely Associated with the Genus Cyanothece (Synechococcaceae, Chroococcales)." Applied and Environmental Microbiology 77, no. 17 (2011): 5888–96. http://dx.doi.org/10.1128/aem.00460-11.

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ABSTRACTLake St. Lucia, iSimangaliso Wetland Park, South Africa, is the largest estuarine lake in Africa. Extensive use and manipulation of the rivers flowing into it have reduced freshwater inflow, and the lake has also been subject to a drought of 10 years. For much of this time, the estuary has been closed to the Indian Ocean, and salinities have progressively risen throughout the system, impacting the biotic components of the ecosystem, reducing zooplankton and macrobenthic biomass and diversity in particular. In June 2009, a bloom of a red/orange planktonic microorganism was noted through

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34

Matcher, G., DA Lemley, and JB Adams. "Bacterial community dynamics during a harmful algal bloom of Heterosigma akashiwo." Aquatic Microbial Ecology 86 (May 6, 2021): 153–67. http://dx.doi.org/10.3354/ame01963.

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Phytoplankton bloom events result in distinct changes in the composition and availability of nutrients as well as physical conditions within aquatic ecosystems, resulting in significant effects on bacterial communities. Using a metabarcoding approach, this study investigated the effect of a harmful algal bloom (HAB) of Heterosigma akashiwo in the Sundays Estuary, South Africa, on bacterial community structures in this estuarine ecosystem over an entire bloom event. The occurrence of bacterial lineages occurring in both the oxygen-rich surface water and hypoxic bottom waters in this study refle

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35

Cyrus, D. "A preliminary assessment of impacts on estuarine associated fauna resulting from an intra-basin transfer and fresh water abstraction from aquatic systems in the Richards Bay area of KwaZulu-Natal, South Africa." African Journal of Aquatic Science 26, no. 2 (2001): 115–20. http://dx.doi.org/10.2989/16085910109503732.

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36

Barnes, R. S. K. "Within-species relationship of patchiness to both abundance and occupancy, as exemplified by seagrass macrobenthos." Oecologia 196, no. 4 (2021): 1107–17. http://dx.doi.org/10.1007/s00442-021-04985-w.

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AbstractFor the first time, intraspecific relationships between the macroecological metrics patchiness (P) and both abundance (A) and occupancy (O) were investigated in a faunal assemblage. As a companion study to recent work on interspecific P, A and O patterns at the same localities, intraspecific patterns were documented within each of the more dominant invertebrates forming the seagrass macrobenthos of warm–temperate Knysna estuarine bay (South Africa) and of sub-tropical Moreton Bay (Australia). As displayed interspecifically, individual species showed strong A–O patterns (mean scaling co

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37

martin, r. aidan. "conservation of freshwater and euryhaline elasmobranchs: a review." Journal of the Marine Biological Association of the United Kingdom 85, no. 5 (2005): 1049–73. http://dx.doi.org/10.1017/s0025315405012105.

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published data on the diversity, life history, ecology, and status of freshwater and euryhaline elasmobranchs was reviewed in the context of anthropogenic threats and principles of conservation biology. at least 171 species of elasmobranch, representing 68 genera and 34 families, are recorded from fresh or estuarine waters. of these, over half are marginal in estuaries, less than one-tenth are euryhaline, and one-fifth are obligate in fresh water. obligate freshwater elasmobranchs are dominated by myliobatoid stingrays, of which two-thirds are potamotrygonids endemic to atlantic drainages of s

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38

Huisman, John M., Rainbo R. M. Dixon, Felicity N. Hart, Heroen Verbruggen, and Robert J. Anderson. "The South African estuarine specialist Codium tenue (Bryopsidales, Chlorophyta) discovered in a south-western Australian estuary." Botanica Marina 58, no. 6 (2015). http://dx.doi.org/10.1515/bot-2015-0058.

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Abstract, previously known reliably only from estuarine habitats in South Africa, is recorded from a similar habitat in the Walpole and Nornalup Inlet system, on the south coast of Western Australia. The Australian

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39

Harris, Christopher, Robert W. Gess, Cameron Penn-Clarke, and Bruce S. Rubidge. "Coombs Hill: A Late Devonian fossil locality in the Witpoort Formation (Witteberg Group, South Africa)." South African Journal of Science 117, no. 3/4 (2021). http://dx.doi.org/10.17159/sajs.2021/9190.

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Coombs Hill, a new fossil locality in the Witpoort Formation (Witteberg Group) of South Africa, preserves a record of Famennian (Late Devonian) life in Gondwana. Fossil plants collected at Coombs Hill are preliminarily assigned to several classes. Shelly invertebrates include a variety of bivalve mollusc forms, some of which appear to be preserved in life position. Biodiversity at Coombs Hill is comparable to that of the well-known Waterloo Farm lagerstätte in ordinal diversity, but exhibits differences in species composition. Ongoing taxonomic analysis will provide a rare window into the ecol

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40

Dayaram, Anisha, Linda R. Harris, Barend A. Grobler, et al. "Vegetation Map of South Africa, Lesotho and Swaziland 2018: A description of changes since 2006." Bothalia 49, no. 1 (2019). http://dx.doi.org/10.4102/abc.v49i1.2452.

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Background: The Vegetation Map of South Africa, Lesotho and Swaziland (National Vegetation Map [NVM]) is a fundamental data set that is updated periodically. The National Biodiversity Assessment (NBA) 2018 process provided an opportunity for a more comprehensive revision of the NVM and better alignment between the terrestrial, marine and estuarine ecosystem maps.Objectives: The aim of this study was to update the NVM 2018 and quantify spatial and classification changes since NVM 2012, and describe the rationale and data sources utilised. We also quantified spatial errors corrected in this vers

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41

Barnes, R. S. K. "Do species display characteristic intraspecific levels of patchiness in a given habitat type? The case of intertidal seagrass macrobenthos." Marine Biology 167, no. 12 (2020). http://dx.doi.org/10.1007/s00227-020-03793-9.

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AbstractIntertidal macrobenthic assemblages associated with monospecific stands of Zostera muelleri, Cymodocea serratula, Halodule uninervis and Halophila ovalis seagrasses are known to display uniform spatial patchiness on the Moreton Bay coast of North Stradbroke Island, Queensland, as do those in Z. capensis in the Knysna estuarine bay, South Africa. Thirty-seven historical datasets of these macrobenthic assemblages were re-analysed to assess variation of local patchiness in each of the 18 most common individual assemblage components at each of these localities in terms of three metrics: ov

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