Physics
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30shls1r&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 19, pp. HLS 1-1, CiteID 1983, DOI 10.1029/2003GL017775
Physics
2
Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions, Global Change: Biogeochemical Processes (4805), Hydrology: Plant Ecology, Meteorology And Atmospheric Dynamics: Paleoclimatology
Scientific paper
Leaf stomatal characters influence the response of terrestrial evapotranspiration to climate change and are used as proxies for the reconstruction of past atmospheric [CO2]. We examined the phenotypic response of stomatal index (SI), density (SD) and aperture (AP) to rising atmospheric CO2 in 15 species after four years exposure to a field CO2 gradient (200 to 550 μmol mol-1 atmospheric [CO2]) or at three Free Air CO2 Enrichment (FACE) sites. Along the CO2 gradient, SI and SD showed no evidence of a decline to increasing [CO2], while AP decreased slightly. There was no significant change in SI, SD or AP with CO2 across FACE experiments. Without evolutionary changes, SI and SD may not respond to atmospheric [CO2] in the field and are unlikely to decrease in a future high CO2 world.
Jackson Robert B.
Johnson Hyrum B.
Maherali Hafiz
Reid Chantal D.
Smith Stanley D.
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