Environmental Science and Pollution Research

, Volume 18, Issue 6, pp 1004–1014 | Cite as

Natural dissolved humic substances increase the lifespan and promote transgenerational resistance to salt stress in the cladoceran Moina macrocopa

  • Albert L. Suhett
  • Christian E. W. Steinberg
  • Jayme M. Santangelo
  • Reinaldo L. Bozelli
  • Vinicius F. Farjalla
Research Article



Evidence has accumulated that humic substances (HS) are not inert biogeochemicals. Rather, they cause stress symptoms and may modulate the life history of aquatic organisms. Nevertheless, it is still not clear how HS interact with additional stressors and if their effects are transgenerational. We tested the interactive effects of HS and salt to cladocerans, discussing their consequences for the persistence in fluctuating environments, such as coastal lagoons.


We used life-table experiments to test the effects of natural HS from a polyhumic coastal lagoon (0, 5, 10, 20, 50, and 100 mg dissolved organic carbon (DOC) L−1) on the life-history of the cladoceran Moina macrocopa. We further tested the effects of HS (10 mg DOC L−1), within and across generations, on the resistance of M. macrocopa to salt stress (5.5 g L−1).


HS at 5–20 mg DOC L−1 extended the mean lifespan of M. macrocopa by ~30%. HS also increased body length at maturity by ~4% at 5–50 mg DOC L−1 and stimulated male offspring production at all tested concentrations. Exposure to HS (even maternal only) alleviated the salt-induced reduction of somatic growth. Co-exposure to HS increased body volume by 12–22% relative to salt-only treatments, while pre-exposure to HS increased body volume by 40–56% in treatments with salt presence, when compared to non-pre-exposed animals.


HS at environmentally realistic concentrations, by acting as mild chemical stressors, modify crucial life-history traits of M. macrocopa, favoring its persistence in fluctuating environments. Some of the effects of HS are even transgenerational.


Humic substances Cross-tolerance Zooplankton Salinity Moina Maternal effects 



We are grateful for Ph.D. scholarships from the Brazilian Council of Research and Scientific Development (CNPq) and from the Carlos Chagas Filho Research Support Foundation (FAPERJ) to A. L. Suhett and a research grant to V. F. Farjalla by the FAPERJ (Process E-26/110.216/2010). We also thank the Laboratory of Ecophysiology and Ecotoxicology of Cyanobacteria/UFRJ for providing the P. subcapitata strain used in this study.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Albert L. Suhett
    • 1
  • Christian E. W. Steinberg
    • 2
  • Jayme M. Santangelo
    • 3
  • Reinaldo L. Bozelli
    • 1
  • Vinicius F. Farjalla
    • 1
  1. 1.Laboratório de Limnologia, Departamento de EcologiaUniversidade Federal do Rio de Janeiro (UFRJ)Ilha do FundãoRio de JaneiroBrazil
  2. 2.Laboratory for Freshwater and Stress Ecology, Department of BiologyHumboldt Universität zu BerlinBerlinGermany
  3. 3.Departamento de Ciências Ambientais, Instituto de FlorestasUniversidade Federal Rural do Rio de Janeiro (UFRRJ)SeropédicaBrazil

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