Cover Image

CO2 and CH4 fluxes across a Nuphar lutea (L.) Sm. stand

Cristina Ribaudo, Marco Bartoli, Daniele Longhi, Simona Castaldi, Scott C. Neubauer, Pierluigi Viaroli
  • Cristina Ribaudo
    Department of Environmental Sciences, University of Parma, Italy | cririb@yahoo.it
  • Marco Bartoli
    Department of Environmental Sciences, University of Parma, Italy
  • Daniele Longhi
    Department of Environmental Sciences, University of Parma, Italy
  • Simona Castaldi
    Department of Environmental Sciences, Second University of Naples, Italy
  • Scott C. Neubauer
    Baruch Marine Field Laboratory, University of South Carolina, United States
  • Pierluigi Viaroli
    Department of Environmental Sciences, University of Parma, Italy

Abstract

Floating-leaved rhizophytes can significantly alter net carbon dioxide (CO2) and methane (CH4) exchanges with the atmosphere in freshwater shallow environments. In particular, CH4 efflux can be enhanced by the aerenchyma-mediated mass flow, while CO2 release from supersaturated waters can be reversed by the plant uptake. Additionally, the floating leaves bed can hamper light penetration and oxygen (O2) diffusion from the atmosphere, thus altering the dissolved gas dynamics in the water column. In this study, net fluxes of CO2 and CH4 were measured seasonally across vegetated [Nuphar lutea (L.) Sm.] and free water surfaces in the Busatello wetland (Northern Italy). Concomitantly, dissolved gas concentrations were monitored in the water column and N. lutea leaf production was estimated by means of biomass harvesting. During the vegetative period (May-August), the yellow waterlily stand resulted a net sink for atmospheric carbon (from 97.5 to 110.6 g C-CO2 m-2), while the free water surface was a net carbon source (166.3 g C-CO2 m-2). Both vegetated and plant-free areas acted as CH4 sources, with an overall carbon release comprised between 71.6 and 113.3 g C-CH4 m-2. On the whole, water column chemistry was not affected by the presence of the floating leaves; moreover, no significant differences in CH4 efflux were evidenced between the vegetated and plant-free areas. In general, this study indicates that the colonization of shallow aquatic ecosystems by N. lutea might not have the same drastic effect reported for free-floating macrophytes.

Keywords

methane, carbon dioxide, dissolved oxygen, leaf production.

Full Text:

PDF
HTML
Submitted: 2012-01-18 15:37:52
Published: 2012-01-19 00:00:00
Search for citations in Google Scholar
Related articles: Google Scholar
Abstract views:
1350

Views:
PDF
455
HTML
518

Article Metrics

Metrics Loading ...

Metrics powered by PLOS ALM


Copyright (c) 2012 Cristina Ribaudo, Marco Bartoli, Daniele Longhi, Simona Castaldi, Scott C. Neubauer, Pierluigi Viaroli

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
 
© PAGEPress 2008-2018     -     PAGEPress is a registered trademark property of PAGEPress srl, Italy.     -     VAT: IT02125780185