Number of the records: 1
The Influence of Ozone on Net Ecosystem Production of a Ryegrass-Clover Mixture under Field Conditions
- 1.
SYSNO ASEP 0551776 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Influence of Ozone on Net Ecosystem Production of a Ryegrass-Clover Mixture under Field Conditions Author(s) Agyei, Thomas (UEK-B) ORCID, SAI, RID
Juráň, Stanislav (UEK-B) RID, SAI
Edwards-Jonášová, Magda (UEK-B) RID, SAI, ORCID
Fischer, Milan (UEK-B) RID, ORCID, SAI
Švik, Marian (UEK-B) SAI, RID, ORCID
Komínková, Kateřina (UEK-B) ORCID, SAI, RID
Ofori-Amanfo, Kojo Kwakye (UEK-B) SAI, ORCID, RID
Marek, Michal V. (UEK-B) RID, ORCID, SAI
Grace, John (UEK-B) SAI, RID
Urban, Otmar (UEK-B) RID, ORCID, SAINumber of authors 10 Year of issue 2021 Article number 1629 Source Title Atmosphere. - : MDPI
Roč. 2021, č. 12 (2021)Number of pages 15 s. Publication form Print - P Language eng - English Country CH - Switzerland Keywords tropospheric ozone ; (semi-)natural vegetation ; stomatal conductance ; climate-change ; food security ; ambient air ; impacts ; flux ; exchange ; grassland ; eddy covariance ; linear mixed-effects model ; pre-industrial O-3 conditions ; seasonal carbon uptake ; stomatal ozone flux Subject RIV DG - Athmosphere Sciences, Meteorology OECD category Meteorology and atmospheric sciences R&D Projects EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UEK-B - RVO:86652079 UT WOS 000735789100001 EID SCOPUS 85121683068 DOI 10.3390/atmos12121629 Annotation In order to understand the effect of phytotoxic tropospheric ozone (O-3) on terrestrial vegetation, we quantified the impact of current O-3 concentration ([O-3]) on net ecosystem production (NEP) when compared to the conditions of the pre-industrial era. We compared and tested linear mixed-effects models based on [O-3] and stomatal O-3 flux (F-sto). The managed ryegrass-clover (Lolium perenne and Trifolium pratense) mixture was grown on arable land in the Czech Republic, Central Europe. Values of [O-3] and F-sto were measured and calculated based on resistance analogy, respectively, while NEP was calculated from eddy covariance CO2 fluxes. We found the F-sto-based model more precise when compared to measured NEP. High F-sto was found even at low [O-3], while broad summer maximum of [O-3] was not necessarily followed by significant NEP decline, due to low soil water content leading to a low stomatal conductivity and F-sto. Comparing to low pre-industrial O-3 conditions, current levels of O-3 resulted in the reduction of cumulative NEP over the entire growing season, up to 29.7 and 13.5% when the [O-3]-based and F-sto-based model was applied, respectively. During the growing season, an O-3-induced reduction of NEP ranged between 13.1% in May and 26.2% in July when compared to pre-industrial F-sto levels. Looking to the future, high [O-3] and F-sto may lead to the reduction of current NEP by approximately 13.3% on average during the growing season, but may increase by up to 61-86.6% in autumn, indicating further O-3-induced acceleration of the senescence. These findings indicate the importance of F-sto and its inclusion into the models estimating O-3 effects on terrestrial vegetation. The interaction between environmental factors and stomatal conductance is therefore discussed in detail. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2022 Electronic address https://www.mdpi.com/2073-4433/12/12/1629
Number of the records: 1