| Full text | |
| Author(s): |
Cassimiro, Jessica C.
[1]
;
Moura, Barbara B.
[2]
;
Alonso, Rocio
[3]
;
Meirelles, Sergio T.
[4]
;
Moraes, Regina M.
[1]
Total Authors: 5
|
| Affiliation: | [1] Inst Bot, Caixa Postal 3005, BR-01061970 Sao Paulo, SP - Brazil
[2] Univ Estadual Campinas, Inst Biol, R Monteiro Lobato 255, BR-13083872 Campinas, SP - Brazil
[3] CIEMAT, Ecotoxicol Air Pollut, Ave Complutense 2, E-28040 Madrid - Spain
[4] Univ Sao Paulo, Rua Matao 321, BR-05508090 Sao Paulo, SP - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Environmental Pollution; v. 213, p. 1007-1015, JUN 2016. |
| Web of Science Citations: | 6 |
| Abstract | |
The current levels of surface ozone (O-3) are high enough to negatively affect trees in large regions of Sao Paulo State, southeastern Brazil, where standards for the protection of vegetation against the adverse effects of O-3 do not exist. We evaluated three O-3 metrics - phytotoxic ozone dose (POD), accumulated ozone exposure over the threshold of 40 ppb h (AOT40), and the sum of all hourly average concentrations (SUM00) - for the Brazilian native tropical tree species Astronium graveolens Jacq. We used the DO3SE (Deposition of Ozone for Stomatal Exchange) model and calculated PODY for different thresholds (from 0 to 6 mmol O-3 m(-2) PLA s(-1)), evaluating the model's performance through the relationship between measured and modelled conductance. The response parameters were: visible foliar injury, considered as incidence (% injured plants), severity (% injured leaves in relation to the number of leaves on injured plants), and leaf abscission. The model performance was suitable and significant (R-2 = 0.58; p < 0.001). PODO was better correlated to incidence and leaf abscission, and SUM00 was better correlated to severity. The highest values of O-3 concentration-based metrics (AOT40 and SUM00) did not coincide with those of PODO. Further investigation may improve the model and contribute to the proposition of a national standard for the protection of native species. (C) 2016 Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 13/02309-9 - Assessment of a stomatal ozone flux model in Astronium graveolens Jacq. |
| Grantee: | Jéssica Cristina Cassimiro |
| Support type: | Scholarships in Brazil - Master |