Stomatal uptake of O-3 in aspen and aspen-birch forests under free-air CO2 and O-3 enrichment
(2010) In Environmental Pollution 158(6). p.2023-2031- Abstract
- Rising atmospheric carbon dioxide (CO2) may alleviate the toxicological impacts of concurrently rising tropospheric ozone (O-3) during the present century if higher CO2 is accompanied by lower stomatal conductance (g,), as assumed by many models. We investigated how elevated concentrations of CO2 and O-3, alone and in combination, affected the accumulated stomatal flux of O-3 (AFst) by canopies and sun leaves in closed aspen and aspen-birch forests in the free-air CO2-O-3 enrichment experiment near Rhinelander, Wisconsin. Stomatal conductance for O-3 was derived from sap flux data and AFst was estimated either neglecting or accounting for the potential influence of non-stomatal leaf surface O-3 deposition. Leaf-level AFst (AFst(l)) was not... (More)
- Rising atmospheric carbon dioxide (CO2) may alleviate the toxicological impacts of concurrently rising tropospheric ozone (O-3) during the present century if higher CO2 is accompanied by lower stomatal conductance (g,), as assumed by many models. We investigated how elevated concentrations of CO2 and O-3, alone and in combination, affected the accumulated stomatal flux of O-3 (AFst) by canopies and sun leaves in closed aspen and aspen-birch forests in the free-air CO2-O-3 enrichment experiment near Rhinelander, Wisconsin. Stomatal conductance for O-3 was derived from sap flux data and AFst was estimated either neglecting or accounting for the potential influence of non-stomatal leaf surface O-3 deposition. Leaf-level AFst (AFst(l)) was not reduced by elevated CO2. Instead, there was a significant CO2 x O-3 interaction on AFst(l), as a consequence of lower values of g(s) in control plots and the combination treatment than in the two single-gas treatments. In addition, aspen leaves had higher AFst(l) than birch leaves, and estimates of AFst(l) were not very sensitive to non-stomatal leaf surface O-3 deposition. Our results suggest that model projections of large CO2-induced reductions in g, alleviating the adverse effect of rising tropospheric O-3 may not be reasonable for northern hardwood forests. (C) 2009 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4448832
- author
- Uddling, J ; Hogg, AJ ; Teclaw, RM ; Carroll, MA and Ellsworth, DS
- publishing date
- 2010
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Carbon dioxide, FACE, Forest, Ozone flux, Stomata
- in
- Environmental Pollution
- volume
- 158
- issue
- 6
- pages
- 2023 - 2031
- publisher
- Elsevier
- external identifiers
-
- scopus:77952301147
- pmid:20089338
- ISSN
- 0269-7491
- DOI
- 10.1016/j.envpol.2009.12.001
- language
- English
- LU publication?
- no
- id
- f765f22f-5b60-4406-8619-7f9ff1b12778 (old id 4448832)
- date added to LUP
- 2016-04-01 13:46:23
- date last changed
- 2022-01-27 20:59:31
@article{f765f22f-5b60-4406-8619-7f9ff1b12778,
abstract = {{Rising atmospheric carbon dioxide (CO2) may alleviate the toxicological impacts of concurrently rising tropospheric ozone (O-3) during the present century if higher CO2 is accompanied by lower stomatal conductance (g,), as assumed by many models. We investigated how elevated concentrations of CO2 and O-3, alone and in combination, affected the accumulated stomatal flux of O-3 (AFst) by canopies and sun leaves in closed aspen and aspen-birch forests in the free-air CO2-O-3 enrichment experiment near Rhinelander, Wisconsin. Stomatal conductance for O-3 was derived from sap flux data and AFst was estimated either neglecting or accounting for the potential influence of non-stomatal leaf surface O-3 deposition. Leaf-level AFst (AFst(l)) was not reduced by elevated CO2. Instead, there was a significant CO2 x O-3 interaction on AFst(l), as a consequence of lower values of g(s) in control plots and the combination treatment than in the two single-gas treatments. In addition, aspen leaves had higher AFst(l) than birch leaves, and estimates of AFst(l) were not very sensitive to non-stomatal leaf surface O-3 deposition. Our results suggest that model projections of large CO2-induced reductions in g, alleviating the adverse effect of rising tropospheric O-3 may not be reasonable for northern hardwood forests. (C) 2009 Elsevier Ltd. All rights reserved.}},
author = {{Uddling, J and Hogg, AJ and Teclaw, RM and Carroll, MA and Ellsworth, DS}},
issn = {{0269-7491}},
keywords = {{Carbon dioxide; FACE; Forest; Ozone flux; Stomata}},
language = {{eng}},
number = {{6}},
pages = {{2023--2031}},
publisher = {{Elsevier}},
series = {{Environmental Pollution}},
title = {{Stomatal uptake of O-3 in aspen and aspen-birch forests under free-air CO2 and O-3 enrichment}},
url = {{http://dx.doi.org/10.1016/j.envpol.2009.12.001}},
doi = {{10.1016/j.envpol.2009.12.001}},
volume = {{158}},
year = {{2010}},
}