Role of C3 plant species on carbon dioxide and methane emissions in Mediterranean constructed wetland

  • Carmelo Maucieri | carmelo.maucieri@hotmail.it Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padua, Legnaro (PD), Italy.
  • Maurizio Borin Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padua, Legnaro (PD), Italy.
  • Antonio C. Barbera Department of Agriculture and Food Science, University of Catania, Italy.

Abstract

C3 plant species are widely used to vegetate constructed wetlands (CW), but so far no information is available on their effect on CW CO2(eq) balance in the Mediterranean climate. The aim of this research was to study carbon dioxide (CO2) and methane (CH4) emissions and CO2(eq) budgets of CW horizontal sub-surface flow pilot-plant beds vegetated with Arundo donax L. and Phragmites australis (Cav.) Trin. ex Steud. compared with an unvegetated bed in Sicily. The highest total plant biomass production was measured in the bed vegetated with A. donax (17.0 kg m–2), whereas P. australis produced 7.6 kg m–2. CO2 and CH4 emissions and showed significant correlation with average air temperature and solar radiation for each bed. The CO2 emission values ranged from 0.8±0.1 g m–2 d–1, for the unvegetated bed in April, to 24.9±0.6 g m–2 d–1 for the bed with P. australis in August. The average CO2 emissions of the whole monitored period were 15.5±7.2, 15.1±7.1 and 3.6±2.4 g m–2 d–1 for A. donax, P. australis and unvegetated beds respectively. The CH4 fluxes differed significantly over the monitored seasons, with the highest median value being measured during spring (0.963 g m–2 d–1). No statistical differences were found for CH4 flux among the studied beds. Cumulative estimated CH4 emissions during the study period (from April to December) were 159.5, 134.1 and 114.7 g m–2 for A. donax, P. australis and unvegetated beds respectively. CO2(eq) balance showed that the two vegetated beds act as CO2(eq) sinks, while the unvegetated bed, as expected, acts as a CO2(eq) source. Considering only the above-ground plant biomass in the CO2(eq) budgets, P. australis and A. donax determined uptakes of 1.30 and 8.35 kg CO2(eq) m–2 respectively.

Downloads

Download data is not yet available.

PlumX Metrics

PlumX Metrics provide insights into the ways people interact with individual pieces of research output (articles, conference proceedings, book chapters, and many more) in the online environment. Examples include, when research is mentioned in the news or is tweeted about. Collectively known as PlumX Metrics, these metrics are divided into five categories to help make sense of the huge amounts of data involved and to enable analysis by comparing like with like.

Published
2014-08-21
Section
Original Articles
Keywords:
Arundo donax L., Phragmites australis (Cav.) Trin. ex Steud., methane, carbon dioxide, CO2(eq) balance, biomass production, horizontal subsurface flow constructed wetland.
Statistics
Abstract views: 2135

PDF: 561
HTML: 888
Share it
How to Cite
Maucieri, C., Borin, M., & Barbera, A. (2014). Role of C3 plant species on carbon dioxide and methane emissions in Mediterranean constructed wetland. Italian Journal of Agronomy, 9(3), 120-126. https://doi.org/10.4081/ija.2014.601