Below-ground responses of silver birch trees exposed to elevated CO2 and O-3 levels during three growing seasons
(2005) In Global Change Biology 11(7). p.1167-1179- Abstract
- Field-growing silver birch (Betula pendula Roth) clones (clone 4 and 80) were exposed to elevated CO2 and O-3 in open-top chambers for three consecutive growing seasons (1999-2001). At the beginning of the OTC experiment, all trees were 7 years old. We studied the single and interaction effects of CO2 and O-3 on silver birch below-ground carbon pools (i.e. effects on fine roots and mycorrhizas, soil microbial communities and sporocarp production) and also assessed whether there are any clonal differences in these below-ground CO2 and O-3 responses. The total mycorrhizal infection level of both clones was stimulated by elevated CO2 alone and elevated O-3 alone, but not when elevated CO2 was used in fumigation in combination with elevated... (More)
- Field-growing silver birch (Betula pendula Roth) clones (clone 4 and 80) were exposed to elevated CO2 and O-3 in open-top chambers for three consecutive growing seasons (1999-2001). At the beginning of the OTC experiment, all trees were 7 years old. We studied the single and interaction effects of CO2 and O-3 on silver birch below-ground carbon pools (i.e. effects on fine roots and mycorrhizas, soil microbial communities and sporocarp production) and also assessed whether there are any clonal differences in these below-ground CO2 and O-3 responses. The total mycorrhizal infection level of both clones was stimulated by elevated CO2 alone and elevated O-3 alone, but not when elevated CO2 was used in fumigation in combination with elevated O-3. In both clones, elevated CO2 affected negatively light brown/orange mycorrhizas, while its effect on other mycorrhizal morphotypes was negligible. Elevated O-3, instead, clearly decreased the proportions of black and liver-brown mycorrhizas and increased that of light brown/orange mycorrhizas. Elevated O-3 had a tendency to decrease standing fine root mass and sporocarp production as well, both of these O-3 effects mainly manifesting in clone 4 trees. CO2 and O-3 treatment effects on soil microbial community composition (PLFA, 2- and 3-OH-FA profiles) were negligible, but quantitative PLFA data showed that in 2001 the PLFA fungi : bacteria-ratio of clone 80 trees was marginally increased because of elevated CO2 treatments. This study shows that O-3 effects were most clearly visible at the mycorrhizal root level and that some clonal differences in CO2 and O-3 responses were observable in the below-ground carbon pools. In conclusion, the present data suggests that CO2 effects were minor, whereas increasing tropospheric O-3 levels can be an important stress factor in northern birch forests, as they might alter mycorrhizal morphotype assemblages, mycorrhizal infection rates and sporocarp production. (Less)
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https://lup.lub.lu.se/record/146771
- author
- Kasurinen, A ; Keinanen, MM ; Kaipainen, S ; Nilsson, Lars Ola LU ; Vapaavuori, E ; Kontro, MH and Holopainen, T
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Global Change Biology
- volume
- 11
- issue
- 7
- pages
- 1167 - 1179
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000230336800015
- scopus:27744506681
- ISSN
- 1354-1013
- DOI
- 10.1111/j.1365-2486.2005.00970.x
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Microbial Ecology (Closed 2011) (011008001)
- id
- f8e2066b-d21b-4ea9-9295-30592fca8bf4 (old id 146771)
- date added to LUP
- 2016-04-01 12:10:16
- date last changed
- 2022-04-05 18:33:34
@article{f8e2066b-d21b-4ea9-9295-30592fca8bf4,
abstract = {{Field-growing silver birch (Betula pendula Roth) clones (clone 4 and 80) were exposed to elevated CO2 and O-3 in open-top chambers for three consecutive growing seasons (1999-2001). At the beginning of the OTC experiment, all trees were 7 years old. We studied the single and interaction effects of CO2 and O-3 on silver birch below-ground carbon pools (i.e. effects on fine roots and mycorrhizas, soil microbial communities and sporocarp production) and also assessed whether there are any clonal differences in these below-ground CO2 and O-3 responses. The total mycorrhizal infection level of both clones was stimulated by elevated CO2 alone and elevated O-3 alone, but not when elevated CO2 was used in fumigation in combination with elevated O-3. In both clones, elevated CO2 affected negatively light brown/orange mycorrhizas, while its effect on other mycorrhizal morphotypes was negligible. Elevated O-3, instead, clearly decreased the proportions of black and liver-brown mycorrhizas and increased that of light brown/orange mycorrhizas. Elevated O-3 had a tendency to decrease standing fine root mass and sporocarp production as well, both of these O-3 effects mainly manifesting in clone 4 trees. CO2 and O-3 treatment effects on soil microbial community composition (PLFA, 2- and 3-OH-FA profiles) were negligible, but quantitative PLFA data showed that in 2001 the PLFA fungi : bacteria-ratio of clone 80 trees was marginally increased because of elevated CO2 treatments. This study shows that O-3 effects were most clearly visible at the mycorrhizal root level and that some clonal differences in CO2 and O-3 responses were observable in the below-ground carbon pools. In conclusion, the present data suggests that CO2 effects were minor, whereas increasing tropospheric O-3 levels can be an important stress factor in northern birch forests, as they might alter mycorrhizal morphotype assemblages, mycorrhizal infection rates and sporocarp production.}},
author = {{Kasurinen, A and Keinanen, MM and Kaipainen, S and Nilsson, Lars Ola and Vapaavuori, E and Kontro, MH and Holopainen, T}},
issn = {{1354-1013}},
language = {{eng}},
number = {{7}},
pages = {{1167--1179}},
publisher = {{Wiley-Blackwell}},
series = {{Global Change Biology}},
title = {{Below-ground responses of silver birch trees exposed to elevated CO2 and O-3 levels during three growing seasons}},
url = {{http://dx.doi.org/10.1111/j.1365-2486.2005.00970.x}},
doi = {{10.1111/j.1365-2486.2005.00970.x}},
volume = {{11}},
year = {{2005}},
}