Environmental Biology of Fishes

, Volume 100, Issue 12, pp 1609–1622 | Cite as

Organic matter sources for fish larvae and juveniles in a marine-estuarine interface (Mar Chiquita lagoon, Argentina)

  • Daniel O. BrunoEmail author
  • Luciana Riccialdelli
  • Florencia Botto
  • Eduardo M. Acha


The aim of this study was to analyze the organic matter (OM) origin in the nearshore and the surf zones adjacent to Mar Chiquita lagoon, in order to determine the importance of allochthonous estuarine detritus and in situ marine phytoplankton as carbon (C) sources for young fishes prior to entering the lagoon. Water samples from both the nearshore and the surf zones were collected for estimation of Chlorophyll a concentration, and δ13C and δ15N values of the particulate organic matter (POM). Isotopic composition of the zooplankton and fish larvae from both zones and fish juveniles from the surf zone were also estimated. The contribution of potential OM sources was quantified by Bayesian stable isotope mixing models (SIAR). SIAR models revealed that the POM composition in the coastal area close to Mar Chiquita lagoon comprised a mix of primary producers (terrestrial and marine). The cordgrass Spartina densiflora that develops in the saltmarshes bounding the lagoon, contributed most to the POM of the surf zone, being important as a C source for zooplankton from the same zone. Towards deeper waters (10–12 m, ~2.5 km offshore) with higher chlorophyll a concentrations, phytoplankton contributed most to the POM. Spartina densiflora was not relevant as a C source for larval and juvenile fishes. However, it was of importance to the group of primary consumers, which apparently sustain other zooplankton organisms that fish fed on. In this sense, the OM derived from S. densiflora and exported to the coastal area contributes to sustaining the prey for young fishes outside Mar Chiquita.


Young fishes Organic matter Estuarine environment Stable isotopes SIAR model 



We are deeply grateful to J.M. Díaz de Astarloa and E. Mabragaña (BIMOPE, UNMdP, Argentina) for partially supporting the sampling; to Buenos Aires Province Ministry of Agrarian Subjects’ authorities, M. Iza and J. Mangiarotti (forest guard of Mar Chiquita Biosphere Reserve) for sampling permission; to S.M. Delpiani, C. Rumbold, A. Martínez, J.J. Rosso, D. Castellini and N. Lajud for field assistance; to D.A. Cucchi-Colleoni for chlorophyll a analysis, and to G.I. Álvarez, E. Fanjul and E.N. Gaitán for laboratory assistance. We thank the staff of the UC Davis Stable Isotope Facility for invaluable sample processing services and acknowledge the useful suggestions made by D.L.G. Noakes and two anonymous reviewers on an early draft. This study was supported by grant EXA 647/14 to E.M. Acha, and CONICET PIP 112-200901-00942 to J.M. Díaz de Astarloa and E. Mabragaña. D.O.B. was supported by fellowships from CONICET (Argentina). This is part of D.O.B’s Ph.D. thesis.


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Copyright information

© Springer Science+Business Media B.V. 2017

Authors and Affiliations

  • Daniel O. Bruno
    • 1
    • 2
    Email author
  • Luciana Riccialdelli
    • 1
    • 2
  • Florencia Botto
    • 3
    • 4
  • Eduardo M. Acha
    • 4
    • 5
  1. 1.Laboratorio de Ecología, Fisiología y Evolución de Organismos Acuáticos (LEFyE), Centro Austral de Investigaciones Científicas (CADIC-CONICET), Bernardo Houssay 200UshuaiaArgentina
  2. 2.Instituto de Ciencias Polares, Ambiente y Recursos NaturalesUniversidad Nacional de Tierra del Fuego (ICPA-UNTDF)UshuaiaArgentina
  3. 3.Laboratorio de Ecología, Facultad de Ciencias Exactas y NaturalesUniversidad Nacional de Mar del Plata (UNMdP)Mar del PlataArgentina
  4. 4.Instituto de Investigaciones Marinas y Costeras (IIMyC-UNMdP-CONICET)Mar del PlataArgentina
  5. 5.Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)Mar del PlataArgentina

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