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Leaching of carbon from native and non-native leaf litter of subtropical riparian forests

Daniel J. da Silva, Alice T. Valduga, Joseline Molozzi, Rodrigo Fornel, Rozane M. Restello, Luiz U. Hepp
  • Daniel J. da Silva
    Universidade Regional Integrada do Alto Uruguai e Das Missões (URI), Brazil
  • Alice T. Valduga
    Universidade Regional Integrada do Alto Uruguai e Das Missões (URI), Brazil
  • Joseline Molozzi
    Universidade Estadual da Paraíba, Brazil
  • Rodrigo Fornel
    Universidade Regional Integrada do Alto Uruguai e Das Missões (URI), Brazil
  • Rozane M. Restello
    Universidade Regional Integrada do Alto Uruguai e Das Missões (URI), Brazil
  • Luiz U. Hepp
    Universidade Regional Integrada do Alto Uruguai e Das Missões (URI), Brazil | luizuhepp@gmail.com

Abstract

We evaluated the leaching of dissolved organic and inorganic carbon (DOC and DIC, respectively) from leaf litter of plant species of the native Atlantic Forest and of Pinus elliottii (Engelm.) and Eucalyptus grandis (Hill ex Maiden) forests. We carried out experiments in which leaves from each forest system (native, E. grandis, and P. elliottii) were placed in reactors with sterile water. After 1/4 h, 1 h, 4 h, 12 h, 24 h, and 48 h of incubation, we quantified the concentrations of DIC and DOC of each leachate. The greatest quantity of DIC was leached in the native forest system, whereas the greatest quantity of DOC was leached in the E. grandis forest system. With respect to the period of year, the greatest quantity of DIC was leached in autumn, whereas that of DOC was leached in the summer. Our results demonstrated that the replacement of native species in riparian zones, by non-native forest monocultures, could alter the chemical composition of the water. Finally, the results presented in this paper reinforce the need for a more careful look at ecological processes.

Keywords

Atlantic forest; Eucalyptus grandis; litter decomposition; Pinus elliottii; riparian zone; stream ecology.

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Submitted: 2017-05-02 21:02:46
Published: 2018-01-31 00:00:00
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Copyright (c) 2018 Daniel J. da Silva, Alice T. Valduga, Joseline Molozzi, Rodrigo Fornel, Rozane M. Restello, Luiz U. Hepp

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