Impacts of elevated atmospheric CO2 and O3 on Paper Birch (Betula papyrifera): reproductive fitness

Joseph N.T. Darbah; Mark E. Kubiske; Neil Nelson; Elina Oksanen; Elina Vaapavuori; David F. Karnosky

Treesearch

Impacts of elevated atmospheric CO₂ and O₃ on Paper Birch (Betula papyrifera): reproductive fitness

Informally Refereed

Authors:

Joseph N.T. Darbah, Mark E. Kubiske, Neil Nelson, Elina Oksanen, Elina Vaapavuori, David F. Karnosky

Year:

2007

Type:

Scientific Journal

Station:

Northern Research Station

Source:

The Scientific World Journal. 7(S1): 240-246.

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Download (PDF 60 KB): https://research.fs.usda.gov/download/treesearch/18893.pdf

Abstract

Atmospheric CO₂ and tropospheric O₃ are rising in many regions of the world. Little is known about how these two commonly co-occurring gases will affect reproductive fitness of important forest tree species. Here, we report on the long-term effects of CO₂ and O₃ for paper birch seedlings exposed for nearly their entire life history at the Aspen FACE (Free Air Carbon Dioxide Enrichment) site in Rhinelander, WI. Elevated CO₂ increased both male and female flower production, while elevated O₃ increased female flower production compared to trees in control rings. Interestingly, very little flowering has yet occurred in combined treatment.

Keywords

seed production and germination, paper birch, flowering, elevated CO2 and O3

Citation

Darbah, Joseph N.T.; Kubiske, Mark E.; Nelson, Neil; Oksanen, Elina; Vaapavuori, Elina; Karnosky, David F. 2007. Impacts of elevated atmospheric CO₂ and O₃ on Paper Birch (Betula papyrifera): reproductive fitness. The Scientific World Journal. 7(S1): 240-246.