Effects of decadal exposure to interacting elevated CO2 and/or O3 on paper birch (Betula papyrifera) reproduction

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

Effects of decadal exposure to interacting elevated CO2 and/or O3 on paper birch (Betula papyrifera) reproduction

2008

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.

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Mots clés AGROVOC

betula betula papyrifera biomass carbon dioxide carbon dioxide environmental monitoring flowering forest trees forestry germination greenhouse effect methods oxidants ozone ozone physiology pollen pollution reproduction seed germination seedlings seedlings seeds seeds temperate forests time toxicity vigor wisconsin

Informations bibliographiques

Publié dans

Environmental pollution

Volume 155 Numéro 3 Pagination 446 - 452 ISSN 0269-7491

Editeur

John Wiley & Sons, Ltd

D'autres materias

Elevated atmospheric gases; Plant physiology and biochemistry; Photochemical; Growth & development; Drug effects; Seedling growth; Forestry related; Forest injuries and protection; Flowering tops; Long term experiments; Air pollutants; Plant reproduction

Langue

anglais

Note

In the special issue: forests under anthropogenic pressure-effects of air pollution, climate change and urban development / edited by a. bytnerowicz, m. arbaugh, m. fenn, b. sanchez gimeno and e. paoletti.

Paper presented at the 22nd bi-annual meeting of the international union of forest research organizations (iufro) research group 7.01 “impacts of air pollution and climate change on forest ecosystems”, held september 10-16, 2006, riverside, california.

Includes references

Type

Text; Journal Article

Sur AGRIS depuis: 2024-02-28

Format: MODS

Fournisseur de données

Cette notice bibliographique a été fournie par National Agricultural Library

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Liens

DOI https://handle.nal.usda.gov/10113/21596

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