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Fire Ecology Special Issue Vol. 5, No. 1, 2009

Summary: Fire Ecology Special Issue
Vol. 5, No. 1, 2009
Abella: Smoke-Cued Emergence in Plant Species of Ponderosa Pine Forests
Page 22
Smoke-cued emergence in plant SpecieS of ponderoSa pine
foreStS: contraSting greenhouSe and field reSultS
Scott R. Abella
Public Lands Institute and Department of Environmental Studies,
University of Nevada Las Vegas,
4505 S. Maryland Parkway, Las Vegas, Nevada 89154-2040, USA
Tel.: (702) 895-5163; e-mail: scott.abella@unlv.edu
Smoke-cued seed germination and emergence is common in some frequent-fire ecosys-
tems, but this process is little studied in frequent-fire conifer forests of the southwestern
United States. To assess whether aqueous smoke promotes plant emergence in frequent-
fire ponderosa pine (Pinus ponderosa) forests in northern Arizona, I conducted three ex-
periments at different scales (seed, seed bank, and plant community) in both greenhouse
and field settings. In the first greenhouse experiment, aqueous smoke significantly in-
creased (P < 0.05) emergence of seeds of 13% of 61 assayed species. Five of eight (63%)
Penstemon species exhibited significant increases ranging from two- to ten-fold. In the


Source: Abella, Scott R. - School of Life Sciences, University of Nevada at Las Vegas


Collections: Environmental Sciences and Ecology