Aquatic Sciences

, Volume 79, Issue 3, pp 597–616

Flood pulse induced changes in isotopic niche and resource utilization of consumers in a Mexican floodplain system

  • Alejandra Sepúlveda-Lozada
  • Ulrich Saint-Paul
  • Manuel Mendoza-Carranza
  • Matthias Wolff
  • Alejandro Yáñez-Arancibia
Research Article

DOI: 10.1007/s00027-017-0520-9

Cite this article as:
Sepúlveda-Lozada, A., Saint-Paul, U., Mendoza-Carranza, M. et al. Aquat Sci (2017) 79: 597. doi:10.1007/s00027-017-0520-9

Abstract

Tropical coastal ecosystems of the southern Gulf of Mexico including marshes, mangroves and seagrasses of Centla Wetlands and Terminos Lagoon (Grijalva-Usumacinta delta) are known to host a high diversity of aquatic consumers. Nevertheless, the limited research focusing on the energy fluxes that sustain consumers has as yet neither considered the strong seasonality of these systems, nor the linkage of the trophic flow patterns with ecosystem functioning. The present work analyses and compares stable isotope ratios (δ13C and δ15N) of consumers during the dry and rainy season at different wetland sites to determine their resource utilization. The sites compared comprise three fluvio-lagoons and a coastal mangrove creek that differ in vegetational characteristics, distance to the sea, and freshwater input. The results support the hypothesis that a larger isotopic niche breadth of consumers prevails during the rainy season, when resource availability is supposedly higher. This translates into an increase in resource use diversification by consumers and corroborates the flood pulse concept (FPC), which can be particularly applied to those habitats with high riverine influence in the study area (e.g., fluvio-lagoons). However, the FPC alone cannot be applied to understand the main factors influencing the fate and utilization of basal resources in areas interacting more actively with the sea, and therefore further extensions and/or complementary conceptual approaches considering marine systems highly interconnected with coastal floodplains should be considered.

Keywords

Isotopic niche breadth Resource use Seasonality Centla Wetlands Terminos Lagoon Mexico 

Supplementary material

27_2017_520_MOESM1_ESM.docx (174 kb)
Supplementary material 1 (DOCX 176 KB)
27_2017_520_MOESM2_ESM.docx (171 kb)
Supplementary material 2 (DOCX 171 KB)

Funding information

Funder NameGrant NumberFunding Note
El Colegio de la Frontera Sur (ECOSUR)-CONACYT, Mexico
    Leibniz Centre for Tropical Marine Research (ZMT), Germany

      Copyright information

      © Springer International Publishing 2017

      Authors and Affiliations

      1. 1.Leibniz Centre for Tropical Marine Research (ZMT)BremenGermany
      2. 2.El Colegio de la Frontera Sur, ECOSUR Unidad VillahermosaDepartamento de Ciencias de la Sustentabilidad-Manejo Sustentable de Cuencas y Zonas CosterasVillahermosaMexico
      3. 3.Instituto de Ecología A. C. INECOL (CONACYT)Red Ambiente y SustentabilidadXalapaMexico

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