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Fish food webs in a South African estuary: a spatial and temporal assessment

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Abstract

A large number of studies across many different disciplines have been conducted on the Swartvlei estuarine system over the past five decades, thus providing an ideal opportunity to review spatial and temporal aspects of fish food webs in the lower estuary and upper lake. The aquatic and semi-aquatic macrophytes, together with the physico-chemical environment associated with these two parts of the system are very different, thus providing an immediate contrast in terms of habitat functioning for the associated fish assemblages. In addition, major macrophyte senescence is known to occur episodically in Swartvlei Lake, bringing with it major consequences for the trophic functioning of that part of the system. The scientific information on the Swartvlei estuarine lake system is reviewed and conceptual trophic diagrams created that encapsulate both the spatial and temporal aspects described above. The next step in our understanding of the trophic functioning of the Swartvlei system is to undertake stable isotope analyses in both the lake and estuary. To prepare for such a step, the global literature on the use of stable isotopes in estuaries is reviewed and some of the findings, particularly in relation to fishes and food webs in different habitats, are highlighted. One of the conclusions reached by this review is that microalgae, whether epipsammic, epiphytic and/or planktonic, have been under-estimated relative to estuarine macrophytes in terms of their importance to the nutrition and productivity of fishes in estuaries. The central role of detritus and associated microorganisms in providing trophic stability for invertebrates and fishes in estuaries is also highlighted. Finally, it is apparent that fishes do not rely on a single source of organic matter for growth and development, e.g. most carnivorous fish species rely on mixes of prey that use different organic sources for production, and that benthic/demersal fishes in particular seem to access food chains from different parts of the water column.

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References

  • Akin S, Winemiller KO (2008) Body size and trophic position in a temperate estuarine food web. Acta Oecol 33:144–153

    Google Scholar 

  • Alfaro AC, Thomas F, Sergent L, Duxbury M (2006) Identification of trophic interactions within an estuarine food web (northern New Zealand) using fatty acid biomarkers and stable isotopes. Est Coast Shelf Sci 70:271–286

    Google Scholar 

  • Allanson BR, HowardWilliams C (1984) A contribution to the chemical limnology of Swartvlei. Arch Hydrobiol 99:133159

    Google Scholar 

  • Baird D, Ulanowicz RE (1993) Comparative study of the trophic structure, cycling and ecosystem properties of four tidal estuaries. Mar Ecol Prog Ser 99:221–237

    Google Scholar 

  • Baird D, Hanekom NM, Grindley JR (1986) Report No. 23: Swartkops (CSE 3). In: Heydorn, AEF, Grindley JR (ed) Estuaries of the Cape. Part II. Synopses of available information on individual systems. CSIR Res Rep 422:1–82

  • Benstead JP, March JG, Fry B, Ewel KC, Pringle CM (2006) Testing IsoSource: stable isotope analysis of a tropical fishery with diverse organic matter sources. Ecology 87:326–333

    PubMed  Google Scholar 

  • Bergamino L, Richoux NB (2015) Spatial and temporal changes in estuarine food web structure: differential contributions of marsh grass detritus. Est Coast 38:367–382

    CAS  Google Scholar 

  • Bergamino L, Dalu T, Whitfield AK, Carassou L, Richoux NB (2014) Stable isotope evidence of habitat coupling by a top predatory fish (Argyrosomus japonicus: Sciaenidae: Teleostei) in the Kowie Estuary, South Africa. Afr J Mar Sci 36:207–213

    Google Scholar 

  • Birch GF, du Plessis A, Willis JP (1978) Offshore and on land geological and geophysical investigations in the Wilderness lakes region. Trans Geol Soc S Afr 81:339–352

    CAS  Google Scholar 

  • Blaber SJM (1974) Field studies of the diet of Rhabdosargus holubi (Pisces: Teleostei: Sparidae). J Zool Lond 173:407417

    Google Scholar 

  • Blaber SJM (1976) The food and feeding ecology of Mugilidae in the St Lucia lake system. Biol J Linn Soc 8:267277

    Google Scholar 

  • Blaber SJM (1979) The biology of filter feeding teleosts in Lake St Lucia, Zululand. J Fish Biol 15:37–59

    Google Scholar 

  • Blaber SJM (1984) The diet, food selectivity and niche of Rhabdosargus sarba (Teleostei: Sparidae) in Natal estuaries. S Afr J Zool 19:241246

    Google Scholar 

  • Blaber SJM, Whitfield AK (1977) The feeding ecology of juvenile mullet (Mugilidae) in southeast African estuaries. Biol J Linn Soc 9:277284

    Google Scholar 

  • Blaber SJM, Cyrus DP, Whitfield AK (1981) The influence of zooplankton food resources on the morphology of the estuarine clupeid Gilchristella aestuarius (Gilchrist, 1914). Environ Biol Fish 6:351355

    Google Scholar 

  • Boshoff AF, Palmer NG, Piper SE (1991a) Spatial and temporal abundance of waterbirds in the southern Cape Province. Part 1: diving and surface predators. Ostrich 62:156–177

    Google Scholar 

  • Boshoff AF, Palmer NG, Piper SE (1991b) Spatial and temporal abundance of waterbirds in the southern Cape Province. Part 2: waterfowl. Ostrich 62:178–196

    Google Scholar 

  • Boshoff AF, Palmer NG, Piper SE (1991c) Spatial and temporal abundance of waterbirds in the southern Cape Province. Part 3: wading birds. Ostrich 62:197–214

    Google Scholar 

  • Bouillon S, Connolly RM, Gillikin DP (2011) Use of stable isotopes to understand food webs and ecosystem functioning in estuaries. In: Wolanski E, McLusky D (eds) Treatise on estuaries and coastal science. Academic, Waltham, pp 143–173

    Google Scholar 

  • Buchheister A, Latour RJ (2015) Diets and trophic-guild structure of a diverse fish assemblage in Chesapeake Bay, U.S.A. J Fish Biol 86:967–992

    CAS  PubMed  Google Scholar 

  • Burke JS (1995) Role of feeding and prey distribution of summer and southern flounder in selection of estuarine nursery habitats. J Fish Biol 47:355–366

    Google Scholar 

  • Cabral HN (2000) Comparative feeding ecology of sympatric Solea solea and S. senegalensis, within the nursery areas of the Tagus estuary, Portugal. J Fish Biol 57:1550–1562

  • Christian RR, Baird D, Luczkovich J, Johnson JC, Scharler UM, Ulanowicz RE (2005) Chap. 3. Role of network analysis in comparative ecosystem ecology of estuaries. In: Belgrano A, Scharler UM, Dunne J, Ulanowicz RE (eds) Aquatic food webs: an ecosystems approach. Oxford University Press, Oxford, pp 25–40

    Google Scholar 

  • Claudino MC, Pessanha ALM, Araújo FG, Garcia AM (2015) Trophic connectivity and basal food sources sustaining tropical aquatic consumers along a mangrove to ocean gradient. Est Coast Shelf Sci 167:45–55

    Google Scholar 

  • Coetzee DJ (1981) Zooplankton distribution in relation to environmental conditions in the Swartvlei system, southern Cape. J Limnol Soc Sth Afr 7:512

    Google Scholar 

  • Coetzee DJ (1982) Stomach content analysis of the leervis, Lichia amia (L.), from the Swartvlei system, southern Cape. S Afr J Zool 17:177181

    Google Scholar 

  • Couch CA (1989) Carbon and nitrogen stable isotopes of meiobenthos and their food resources. Science 28:433–441

    Google Scholar 

  • Cowley PD, Kerwath SE, Childs A-R, Thorstad EB, Økland F, Næsje TF (2008) Estuarine habitat use in juvenile dusky kob Argyrosomus japonicus (Sciaenidae), with implications for management. Afr J Mar Sci 30:247–253

    Google Scholar 

  • Cruz LR, Santos LN, Santos AF (2018) Changes of fish trophic guilds in Araruama Lagoon, Brazil: what can be inferred about functioning and structure of hypersaline lagoons? Estuar Coast Shelf Sci 211:90–99

  • CSIR (1978) Hydrological study of the Swartvlei Estuary: effects of established and planned bridges on water movements, vol 1. Engineers report. CSIR Report C/SEA 7805/1: 20 pp, 21 Figs

  • Darnell RM (1961) Trophic spectrum of an estuarine community based on studies of Lake Pontchartrain, Louisiana. Ecology 42:553–568

    Google Scholar 

  • Darnell RM (1967) The organic detritus problem. In: Estuaries (Lauff GH, ed). Am Assoc Adv Sci Publ 83:374–375

  • Davies BR (1982) Studies on the zoobenthos of some southern Cape coastal lakes. Spatial and temporal changes in the benthos of Swartvlei, South Africa, in relation to changes in the submerged littoral macrophyte community. J Limnol Soc Sth Afr 8:3345

    Google Scholar 

  • de Jonge VN, Schückel U, Baird D (2019a) Subsets of food webs cannot be used as a substitute to assess the functioning of entire ecosystems. Mar Ecol Prog Ser 613:49–66

    Google Scholar 

  • de Jonge VN, Schückel U, Baird D (2019b) Effects of spatial scale, species aggregation and balancing on carbon flows and ecological network analysis indicators of food webs. Mar Ecol Prog Ser 613:15–47

    Google Scholar 

  • Deegan LA, Garritt RH (1997) Evidence for spatial variability in estuarine food webs. Mar Ecol Prog Ser 147:31–47

    Google Scholar 

  • Dolbeth M, Martinho F, Leitão R, Cabral H, Pardal MA (2008) Feeding patterns of the dominant benthic and demersal fish community in a temperate estuary. J Fish Biol 72:2500–2517

    Google Scholar 

  • Dye AH (1978a) An ecophysiological study of the meiofauna of the Swartkops estuary. 1. The sampling sites: physical and chemical features. Zool Afr 13:118

    Google Scholar 

  • Dye AH (1978b) Diurnal vertical migrations of meiofauna in an estuarine sand flat. Zool Afr 13:201–205

    Google Scholar 

  • Dye AH (1978c) Seasonal fluctuations in the vertical distribution of meiofauna in the Swartkops estuary. Zool Afr 13:207212

    Google Scholar 

  • Dye AH, Furstenburg JP (1978) An ecophysiological study of the meiofauna of the Swartkops estuary. 2. The meiofauna: Composition, distribution, seasonal fluctuation and biomass. Zool Afr 13:1932

  • Dye AH, Erasmus T, Furstenburg JP (1978) An ecophysiological study of the benthic meiofauna of the Swartkops estuary. 3. Partition of benthic oxygen consumption and the relative importance of the meiofuana. Zool Afr 13:187200

    Google Scholar 

  • Fairall N (1981) A study of the bioenergetics of the redknobbed coot Fulica cristata on a South African estuarine lake. S Afr J Wildl Res 11:14

    Google Scholar 

  • Fath BD, Asmus H, Asmus R et al (2019) Ecological network analysis metrics: the need for an entire ecosystem approach in management and policy. Ocean Coast Manag 174:1–14

    Google Scholar 

  • Faust MA, Chrost RJ (1981) Photosynthesis, extracellular release and heterotrophy of dissolved organic matter in Rhode River estuarine plankton. Estuaries and nutrients: contemporary issues in science and society. Humana Press, New Jersey

    Google Scholar 

  • Feyrer F, Herbold B, Matern SA, Moyle PB (2003) Dietary shifts in a stressed fish assemblage: consequences of a bivalve invasion in the San Franciso Estuary. Environ Biol Fish 67:277–288

    Google Scholar 

  • Fijen APM (1995a) Swartvlei Lake catchment: Diep, Klein-Wolwe, Hoëkraal and Karatara rivers, water management strategy. Volume 2: water resources. Department of Water Affairs and Forestry, Pretoria, 47 pp

    Google Scholar 

  • Fijen APM (1995) Swartvlei Lake catchment: Diep, Klein-Wolwe, Hoëkraal and Karatara rivers, water management strategy, vol 3: water quality. Department of Water Affairs and Forestry, Pretoria, p 51

    Google Scholar 

  • Fijen APM, Kapp JF (1995) Swartvlei Lake catchment, Diep, Klein-Wolwe, Hoëkraal and Karatara rivers, water management strategy, vol 1: present situation. Department of Water Affairs & Forestry, Pretoria, p 115

    Google Scholar 

  • França S, Vasconcelos RP, Tanner S, Máguas C, Costa MJ, Cabral HN (2011) Assessing food web dynamics and relative importance of organic matter sources for fish species in two Portuguese estuaries: a stable isotope approach. Mar Environ Res 72:204–215

    PubMed  Google Scholar 

  • France R (1995) Stable nitrogen isotopes in fish: literature synthesis on the influence of ecotonal coupling. Science 41:737–742

    CAS  Google Scholar 

  • Fry B, Chumchal MM (2011) Sulfur stable isotope indicators of residency in estuarine fish. Limnol Oceanogr 56:1563–1576

    Google Scholar 

  • Fry B, Parker PL (1979) Animal diet in Texas seagrass meadows: δ13C evidence for the importance of benthic plants. Est Coast Shelf Sci 8:499–509

    CAS  Google Scholar 

  • Gaughan DJ, Potter IC (1997) Analysis of diet and feeding strategies within an assemblage of estuarine larval fish and an objective assessment of dietary niche overlap. Fish Bull 95:722–731

    Google Scholar 

  • Grange N, Allanson BR (1995) The influence of freshwater inflow on the nature, amount and distribution of seston in estuaries of the Eastern Cape, South Africa. Est Coast Shelf Sci 40:403–420

    CAS  Google Scholar 

  • Griffiths MH (1996) Life history of the dusky kob Argyrosomus japonicus (Sciaenidae) off the east coast of South Africa. S Afr J Mar Sci 17:135–154

    Google Scholar 

  • Grimaldo LF, Stewart AR, Kimmerer W (2009) Dietary segregation of pelagic and littoral fish assemblages in a highly modified tidal freshwater estuary. Mar Coast Fish 1:200–217

    Google Scholar 

  • Hackney CT, Haines EB (1980) Stable isotope composition of fauna and organic matter collected in a Mississipi estuary. Est Coast Shelf Sci 10:703–708

  • Hadwen WL, Russell GL, Arthington AH (2007) Gut content- and stable isotope-derived isotopes in four commercially and recreationally important fish species in two intermittently open estuaries. Mar Freshw Res 58:363–375

  • Haines EB (1977) The origins of detritus in Georgia salt marsh estuaries. Oikos 29:254–260

    Google Scholar 

  • Haines EB, Montague CL (1979) Food sources of estuarine invertebrates analysed using 13C/12C ratios. Ecology 60:48–56

    Google Scholar 

  • Hanekom N, Russell IA (2015) Temporal changes in the macrobenthos of sandprawn (Callichirus kraussi) beds in Swartvlei Estuary, South Africa. Afr Zool 50:41–51

    Google Scholar 

  • Herzka SZ (2005) Assessing connectivity of estuarine fishes based on stable isotope ratio analysis. Est Coast Shelf Sci 64:58–69

    Google Scholar 

  • Hill BJ (1975) The origin of southern African coastal lakes. Trans Roy Soc S Afr 41:225240

    Google Scholar 

  • HowardWilliams C (1977) The distribution of nutrients in Swartvlei, a southern Cape coastal lake. Water SA 3:213217

    Google Scholar 

  • HowardWilliams C (1978) Growth and production of aquatic macrophytes in a south temperate saline lake. Int Ver Theor Limnol 20:11531158

    Google Scholar 

  • HowardWilliams C, Allanson BR (1981a) Phosphorous cycling in a dense Potamogeton pectinatus L. bed. Oecologia 49:5666

    Google Scholar 

  • HowardWilliams C, Allanson BR (1981b) An integrated study on littoral and pelagic primary production in a southern African coastal lake. Arch Hydrobiol 92:507534

    Google Scholar 

  • HowardWilliams C, Davies BR (1979) The rates of dry matter and nutrient loss from decomposing Potamogeton pectinatus in a brackish southtemperate coastal lake. Freshw Biol 9:1321

    Google Scholar 

  • HowardWilliams C, Liptrot MR (1980) Submerged macrophyte communities in a brackish South African estuarinelake system. Aquat Bot 9:101116

    Google Scholar 

  • Hughes EH, Sherr EB (1983) Subtidal food webs in a Georgia Estuary, δ13C analysis. J Exp Mar Biol Ecol 67:227–242

    Google Scholar 

  • Islam MS, Hibino M, Tanaka M (2006) Distribution and diets of larval and juvenile fishes: influence of salinity gradient and turbidity maximum in a temperate estuary in upper Arieake Bay, Japan. Science 68:62–74

    Google Scholar 

  • Jerling HL, Wooldridge TH (1995) Relatively negative δ13C ratios of mesozooplankton in the Sundays River estuary, comments on potential carbon sources. Sth Afr J Aq Sci 21:71–77

    Google Scholar 

  • Kirby-Smith WW (1976) The detritus problem and the feeding and digestion of an estuarine organism. Estuarine processes. uses, stresses, and adaptation to the estuary. Academic, New York, pp 469–479

    Google Scholar 

  • Kitting CL, Fry B, Morgan MD (1984) Detection of inconspicuous epiphytic algae supporting supporting food webs in seagrass meadows. Oecologia 62:145-

    PubMed  Google Scholar 

  • Kok HM, Whitfield AK (1986) The influence of open and closed mouth phases on the marine fish fauna of the Swartvlei estuary. S Afr J Zool 21:309315

    Google Scholar 

  • Leakey CDB, Attrill MJ, Jennings S, Fitzsimons MF (2008) Stable isotopes in juvenile marine fishes and their invertebrate prey in the Thames Estuary, UK, and adjacent coastal regions. Est Coast Shelf Sci 77:513–522

    Google Scholar 

  • Lemley DA, Taljaard S, Adams JB, Strydom N (2014) Nutrient characterisation of river inflow into the estuaries of the Gouritz Water Management Area, South Africa. Water SA 40:687–698

    Google Scholar 

  • Lin H-J, Kao W-Y, Wang Y-T (2007) Analyses of stomach contents and stable isotopes reveal food sources of estuarine detritivorous fish in subtropical/tropical Taiwan. Est Coast Shelf Sci 73:527–537

    Google Scholar 

  • Liptrot MRN (1978) Community metabolism and phosphorus dynamics in a seasonally closed South African estuary. MSc thesis, Rhodes University, Grahamstown

  • Longhurst AR (1957) The food of the demersal fishes of a west African estuary. J Anim Ecol 26:368–387

    Google Scholar 

  • Maes J, Tackx M, Soetaert K (2005) The predation impact of juvenile herring Clupea harengus and sprat Sprattus sprattus on estuarine zooplankton. Hydrobiologia 540:225–235

    Google Scholar 

  • Mann KH (1988) Production and use of detritus in various freshwater, estuarine, and coastal marine ecosystems. Limnol Oceanogr 33:910–930

    CAS  Google Scholar 

  • Marais JFK (1984) Feeding ecology of major carnivorous fish from four eastern Cape estuaries. S Afr J Zool 19:210223

    Google Scholar 

  • Martin ARH (1962) Evidence relating to the Quarternary history of the Wilderness Lakes. Trans Geol Soc S Afr 65:19–42

    Google Scholar 

  • Martinetto P, Teichberg M, Valiela I (2006) Coupling of estuarine benthic and pelagic food webs to nitrogen-derived nitrogen sources in Waquoit Bay, Massachusetts, USA. Mar Ecol Prog Ser 307:37–48

    CAS  Google Scholar 

  • Mbande S, Froneman W, Whitfield AK (2004) The primary carbon sources utilised by fishes in the Mngazi and Mngazana estuaries, South Africa: a preliminary assessment. Afr J Aquat Sci 29:195–204

    Google Scholar 

  • McConnaughey T, McRoy CP (1979) δ13C label identifies eelgrass (Zostera marina) in an Alaskan estuarine food web. Mar Biol 53:263–269

    Google Scholar 

  • Melville AJ, Connolly RM (2003) Spatial analysis of stable isotope data to determine primary sources of nutrition for fish. Oecologia 136:499–507

    PubMed  Google Scholar 

  • O’Callaghan M (1983) Fig. 13 (pp 28–29). In: Heydorn AEF, Grindley JR (eds) Report No. 22: Swartvlei (CMS 11), Estuaries of the Cape. Part II. Synopses of available information on individual systems. CSIR Res Rep 421:1–62

  • Odum WE (1968) The ecological significance of fine particle selection by the striped mullet Mugil cephalus. Limnol Oceanogr 13:92–98

    Google Scholar 

  • Odum WE (1970) Utilization of the direct grazing and plant detritus food chains by the striped mullet Mugil cephalus. In: Steele JH (ed) Marine Food Chains. University of California Press, Berkeley, pp 222–240

    Google Scholar 

  • Odum WE, Heald EJ (1972) Trophic analysis of an estuarine mangrove community. Bull Mar Sci 22:671–738

    Google Scholar 

  • Olin JA, Rush SA, MacNeil MA, Fisk AT (2012) Isotopic ratios reveal mixed seasonal variation among fishes from two subtropical estuarine systems. Est Coast 35:811–820

    Google Scholar 

  • Pasquaud S, Elie P, Jeantet C, Billy I, Martinez P, Girardin M (2008) A preliminary investigation of the fish food web in the Gironde Estuary, France, using stable isotope analyses. Est Coast Shelf Sci 78:267–279

    Google Scholar 

  • Paterson AW, Whitfield AK (1997) A stable carbon isotope study of the food-web in a freshwater-deprived South African estuary, with particular emphasis on the ichthyofauna. Est Coast Shelf Sci 45:705–715

    Google Scholar 

  • Peterson BJ, Fry B (1987) Stable isotopes in ecosystem studies. Ann Rev Ecol Syst 18:293–320

    Google Scholar 

  • Peterson BJ, Howarth RW, Garritt RH (1986) Sulphur and carbon isotopes as tracers of salt-marsh organic matter flow. Ecology 67:865–874

    CAS  Google Scholar 

  • Pillay D, Williams C, Whitfield AK (2012) Indirect effects of bioturbation by the burrowing prawn Callichirus kraussi on a benthic foraging fish, Liza richardsonii. Mar Ecol Prog Ser 453:151–158

    Google Scholar 

  • Robarts RD (1976a) Primary productivity of the upper reaches of a South African estuary (Swartvlei). J Exp Mar Biol Ecol 24:93102

    Google Scholar 

  • Robarts RD (1976b) A preliminary study of the uptake of dissolved organic compounds by the heterotrophic microbial populations of Swartvlei, South Africa. Trans Rhod Sci Ass 57:3544

    Google Scholar 

  • Robarts RD (1979) Heterotrophic utilization of acetate and glucose in Swartvlei, South Africa. J Limnol Soc Sth Afr 5:8488

    Google Scholar 

  • Robarts RD, Allanson BR (1977) Meromixis in the lakelike upper reaches of a South African estuary. Arch Hydrobiol 80:531540

    Google Scholar 

  • Robb F, Davies BR, Cross R, Kenyon C, Howard-Williams C (1979) Cellulolytic bacteria as primary colonizers of Potamogeton pectinatus L. (sago pond weed) from a brackish southtemperate coastal lake. Microb Ecol 5:167177

    Google Scholar 

  • Russell IA (1996) Fish abundance in the Wilderness and Swartvlei lake systems: changes relative to environmental factors. S Afr J Zool 31:1–9

    Google Scholar 

  • Russell IA (2015) Spatio-temporal variability of five surface water quality parameters in the Swartvlei estuarine lake system. Afr J Aquat Sci 40:119–131

    Google Scholar 

  • Russell IA, Randall RM (2017) Effects of prolonged elevated water salinity on submerged macrophyte and waterbird communities in Swartvlei Lake, South Africa. Water SA 43:666–672

    Google Scholar 

  • Scharler UM, Baird D (2005) A comparison of selected ecosystem attributes in three South African estuaries with different inflow regimes, using network analysis. J Mar Sys 56:283–308

    Google Scholar 

  • Schlacher TA, Liddell B, Gaston TF, Bryce M (2005) Fish track wastewater pollution to estuaries. Oecologia 144:570–584

    PubMed  Google Scholar 

  • Schleyer MH (1986) Decomposition in estuarine ecosystems. J Limnol Soc Sth Afr 12:90–98

    Google Scholar 

  • Siebert T, Branch GM (2006) Ecosystem engineers: interactions between eelgrass Zostera capensis and the sandprawn Callianassa kraussi and their indirect effects on the mudprawn Upogebia africana. J Exp Mar Biol Ecol 338:253–270

    Google Scholar 

  • Silberbauer MJ (1982) Phosphorous dynamics in the monimolimnion of Swartvlei. J Limnol Soc Sth Afr 8:5460

    Google Scholar 

  • Simenstad CA, Wissmar RC (1985) δ13C evidence of the origins and fates of organic carbon in estuarine and nearshore food webs. Mar Ecol Prog Ser 22:141–152

    Google Scholar 

  • Strydom NA (2015) Patterns in larval fish diversity, abundance and distribution in temperate South African estuaries. Est Coast 38:268–284

    Google Scholar 

  • Strydom NA, Sutherland K, Wooldridge TH (2014) Diet and prey selection in late-stage larvae of five species of fish in a temperate estuarine nursery area. Afr J Mar Sci 36:85–98

    Google Scholar 

  • Sumpton W, Greenwood J (1990) Pre- and post-flood feeding ecology of four species of juvenile fish from the Logan-Albert estuarine system, Moreton Bay, Queensland. Mar Freshw Res 41:795–806

    Google Scholar 

  • Taylor DI (1983) The effects of a major macrophyte regression upon primary production in the littoral zone of Swartvlei. Arch Hydrobiol 96:345353

    Google Scholar 

  • Thiel R, Mehner T, Kopcke B, Kafemann R (1996) Diet niche relationships among early life stages of fish in German estuaries. Mar Freshw Res 47:123–136

    Google Scholar 

  • Vasconcellos RM, Gomes-Gonçalves RS, Santos JNS, Cruz Filho AG, Araújo FG (2018) Do closely related species share of feeding niche along growth? Diets of three sympatric species of the mojarras (Actinopterygii: Gerreidae) in a tropical bay in southeastern Brazil. Environ Biol Fish 101:949–962

    Google Scholar 

  • Vaslet A, Phillips DL, France C, Feller IC, Baldwin CC (2012) The relative importance of mangroves and seagrass beds as feeding areas for resident and transient fishes among different mangrove habitats in Florida and Belize: evidence from dietary and stable-isotope analyses. J Exp Mar Biol Ecol 434/435:81–93

    Google Scholar 

  • Whitfield AK (1984) The effects of prolonged aquatic macrophyte senescence on the biology of the dominant fish species in a southern African coastal lake. Est Coast Shelf Sci 18:315329

    Google Scholar 

  • Whitfield AK (1985) The role of zooplankton in the feeding ecology of fish fry from some southern African estuaries. S Afr J Zool 20:166171

    Google Scholar 

  • Whitfield AK (1986) Fish community structure response to major habitat changes within the littoral zone of an estuarine coastal lake. Environ Biol Fish 17:4151

    Google Scholar 

  • Whitfield AK (1988a) The role of tides in redistributing macrodetrital aggregates within the Swartvlei estuary. Estuaries 11:152159

    Google Scholar 

  • Whitfield AK (1988b) The fish community of the Swartvlei estuary and the influence of food availability on resource utilization. Estuaries 11:160170

    Google Scholar 

  • Whitfield AK (1989a) Fish larval composition, abundance and seasonality in a southern African estuarine lake. S Afr J Zool 24:217224

    Google Scholar 

  • Whitfield AK (1989b) The benthic invertebrate community of a southern Cape estuary: structure and possible food sources. Trans Roy Soc S Afr 47:159179

    Google Scholar 

  • Whitfield AK (1989c) Ichthyoplankton interchange in the mouth region of a southern African estuary. Mar Ecol Prog Ser 54:2533

    Google Scholar 

  • Whitfield AK (1993) Fish biomass estimates from the littoral zone of an estuarine coastal lake. Estuaries 16:280–289

    Google Scholar 

  • Whitfield AK (2017) The role of seagrass meadows, mangrove forests, salt marshes and reed beds as nursery areas and food sources for fishes in estuaries. Rev Fish Biol Fish 27:75–110

    Google Scholar 

  • Whitfield AK, Blaber SJM (1978) Food and feeding ecology of piscivorous fishes at Lake St Lucia, Zululand. J Fish Biol 13:675–691

    Google Scholar 

  • Whitfield AK, Harrison TD (1996) Gilchristella aestuaria (Pisces: Clupeidae) biomass and consumption of zooplankton in the Sundays Estuary. S Afr J Mar Sci 17:49–53

    Google Scholar 

  • Whitfield AK, Kok HM (1992) Recruitment of juvenile marine fishes into permanently open and seasonally open estuarine systems on the southern coast of South Africa. Ichthyol Bull JLB Smith Inst Ichthyol 57:1–39

    Google Scholar 

  • Whitfield AK, Allanson BR, Heinecken TJE (1983) Report No. 22: Swartvlei (CMS 11). In: Heydorn, AEF, Grindley JR (ed) Estuaries of the Cape. Part II. Synopses of available information on individual systems. CSIR Res Rep 421:1–62

  • Wissel B, Gaçe A, Fry B (2005) Tracing river influences on phytoplankton dynamics in two Louisiana estuaries. Ecology 86:2751–2762

    Google Scholar 

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Acknowledgements

The author thanks the Institute for Freshwater Studies (Rhodes University) and South African Institute for Aquatic Biodiversity (SAIAB) for financial, logistical and infrastructural support whilst the author was employed to conduct research on the Swartvlei system. The NRF-SAIAB are gratefully acknowledged for access to online literature resources and library facilities at SAIAB, and for covering the illustration preparation costs of Figs. 2, 3, 4, 6 and 7. The comments of two anonymous reviewers on an earlier draft of this manuscript were most useful in preparing the final review.

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  1. South African Institute for Aquatic Biodiversity (SAIAB), Private Bag 1015, Grahamstown/Makhanda, 6139, South Africa

    Alan K. Whitfield

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Correspondence to Alan K. Whitfield.

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This manuscript was prepared whilst the author was in retirement and he hereby declares that there is no potential conflict of interest relating to this review. Since no fishes were used in the preparation of this manuscript, no animal ethics clearance was required from either Rhodes University or SAIAB.

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Whitfield, A.K. Fish food webs in a South African estuary: a spatial and temporal assessment. Environ Biol Fish 103, 1495–1512 (2020). https://doi.org/10.1007/s10641-020-01042-y

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