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Effects of decadal exposure to interacting elevated CO2 and/or O3 on paper birch (Betula papyrifera) reproduction.
- Source :
-
Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2008 Oct; Vol. 155 (3), pp. 446-52. Date of Electronic Publication: 2008 Mar 20. - Publication Year :
- 2008
-
Abstract
- We studied the effects of long-term exposure (nine years) of birch (Betula papyrifera) trees to elevated CO(2) and/or O(3) on reproduction and seedling development at the Aspen FACE (Free-Air Carbon Dioxide Enrichment) site in Rhinelander, WI. We found that elevated CO(2) increased both the number of trees that flowered and the quantity of flowers (260% increase in male flower production), increased seed weight, germination rate, and seedling vigor. Elevated O(3) also increased flowering but decreased seed weight and germination rate. In the combination treatment (elevated CO(2)+O(3)) seed weight is decreased (20% reduction) while germination rate was unaffected. The evidence from this study indicates that elevated CO(2) may have a largely positive impact on forest tree reproduction and regeneration while elevated O(3) will likely have a negative impact.
- Subjects :
- Betula drug effects
Biomass
Environmental Monitoring methods
Flowering Tops drug effects
Flowering Tops growth & development
Germination
Greenhouse Effect
Reproduction
Seedlings
Seeds
Time
Wisconsin
Air Pollutants toxicity
Betula physiology
Carbon Dioxide toxicity
Forestry
Oxidants, Photochemical toxicity
Ozone toxicity
Subjects
Details
- Language :
- English
- ISSN :
- 1873-6424
- Volume :
- 155
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Environmental pollution (Barking, Essex : 1987)
- Publication Type :
- Academic Journal
- Accession number :
- 18355950
- Full Text :
- https://doi.org/10.1016/j.envpol.2008.01.033