Methane and carbon dioxide emissions from different ecosystems at the end of dry period in South Vietnam
- PDF / 2,878,225 Bytes
- 16 Pages / 595.276 x 790.866 pts Page_size
- 41 Downloads / 164 Views
Tropical Ecology https://doi.org/10.1007/s42965-020-00118-1
RESEARCH ARTICLE
Methane and carbon dioxide emissions from different ecosystems at the end of dry period in South Vietnam Jiří Dušek1 · Vinh Xuan Nguyen1,2,3,4 · Thuyen Xuan Le3 · Marian Pavelka1 Received: 30 June 2020 / Revised: 2 October 2020 / Accepted: 18 October 2020 © The Author(s) 2020
Abstract The carbon cycle includes important fluxes of methane (CH4) and carbon dioxide (CO2) between the ecosystem and the atmosphere. The fluxes may acquire either positive (release) or negative values (consumption). We calculated these fluxes based on short-campaign in situ chamber measurements from four ecosystems of South Vietnam: intact mountain rain forest, rice field, Melaleuca forest and mangroves (different sites with Avicennia or Rhizophora and a typhoon-disturbed gap). Soil measurements were supplemented by chamber measurements of gas fluxes from the tree stems. Measuring CH4 and CO2 together facilitates the assessment of the ratio between these two gases in connection with current conditions and specificity of individual ecosystems. The highest fluxes of CH4 were recorded in the Melaleuca forest, being within the range from 356.7 to 784.2 mg CH4–C m−2 day−1 accompanied by higher fluxes of CH4 release from Melaleuca tree stems (8.0–262.1 mg CH4–C m−2 day−1). Significant negative soil fluxes of C H4 were recorded in the mountain rain forest, within the range from − 0.3 to − 0.8 mg CH4–C m−2 day−1. Fluxes of CO2 indicate prevailing aerobic activity in the soils of the ecosystems investigated. Quite a large variability of CO2 fluxes was recorded in the soil of the Avicennia mangroves. The in situ measurements of different ecosystems are fundamental for follow-up measurements at different levels such as aerial and satellite gas fluxes observations. Keywords Avicennia alba · Mangroves · Melaleuca cajuputi · Mountain rain forest · Rhizophora apiculata · Rice field
Introduction Functioning of different ecosystems over the landscapes is connected to different dynamics of gas exchange between the atmosphere as the major temporary exchange sink/source of gases, and the whole ecosystem. In carbon cycle, involving biogenic processes, there are important fluxes of methane * Jiří Dušek [email protected] 1
Global Change Research Institute of the Czech Academy of Sciences, Bělidla 4a, 60300 Brno, Czech Republic
2
Department of Ecology, Institute of Tropical Biology VAST, 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam
3
Research Center for Greenhouse Gas and Climate Change, Ho Chi Minh City University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
4
Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 1, 61300 Brno, Czech Republic
(CH4) and carbon dioxide ( CO2), which may acquire either positive (release) or negative values (oxidation/uptake). These gases together with nitrous oxide ( N2O) and water vapour (H2O), belong to greenhouse gases which af
Data Loading...
