Physics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3415807t&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 15, CiteID L15807
Physics
2
Biogeosciences: Biosphere/Atmosphere Interactions (0315), Biogeosciences: Paleoclimatology And Paleoceanography (3344, 4900), Volcanology: Volcano/Climate Interactions (1605, 3309), Volcanology: Atmospheric Effects (0370), Volcanology: Volcanic Gases
Scientific paper
The experimentally determined relationship between atmospheric pCO2 and plant stomata has been used to interpret large but transient changes in atmospheric composition, such as may have resulted from the eruptions of flood basalt. However, this relationship has not been tested in the field, i.e. in the vicinity of active volcanoes, to examine the specific effects of volcanogenic emissions. Moreover, the interpretation of paleoatmospheric pCO2 from fossil stomatal data assumes that the stomatal response resulted solely from variation in pCO2 and ignores the potential effect of outgassed SO2. We hypothesize that volcanogenic SO2 also has a significant effect on leaf stomata and test this hypothesis by measuring the stomatal index of the common swordfern (Nephrolepis exaltata) in the plumes of the actively outgassing vents of Kilauea volcano. We find that, compared to control locations, stomatal index is lowest at sample sites in the plume of Halema'uma'u Crater, where concentrations of both CO2 and SO2 are much higher than background. However, sites located directly in the plume of Pu'u O'o, where SO2 levels are high, but CO2 levels are not, also yield low values of stomatal index. We propose that shifts in the stomatal index of fossil leaves may record transient atmospheric increases in both SO2 and CO2, such as may be caused by eruptions of flood basalts. Calculations of pCO2 based on stomatal frequency are likely to be exaggerated.
Allan Amanda
Smith David L.
Tanner Lawrence H.
No associations
LandOfFree
Stomatal response of swordfern to volcanogenic CO2 and SO2 from Kilauea volcano does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stomatal response of swordfern to volcanogenic CO2 and SO2 from Kilauea volcano, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stomatal response of swordfern to volcanogenic CO2 and SO2 from Kilauea volcano will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-973814