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Presence of Seeds in the Planetary Boundary Layer: Some Earlier Records

Discussion of: Shields, E. J., J. T. Dauer, M. J. Van Gessel, and G. Neumann. 2006. Horseweed (Conyza canadensis) seed collected in the planetary boundary layer.

Published online by Cambridge University Press:  20 January 2017

Robert F. Parsons
Robert F. Parsons*
Affiliation:
Department of Botany, La Trobe University, Bundoora, Victoria, Australia 3086
*
Corresponding author's E-mail: [email protected]
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Abstract

A recent paper (Shields et al. 2006) reports trapping seed of horseweed in the planetary boundary layer (PBL) of the lower atmosphere at heights up to 140 m above ground level. While it claims that seeds have not been trapped from the PBL before, it is shown here that seeds of other weedy composites were trapped at altitudes up to 610 m above ground level in southern Australia more than 40 yr ago.

Keywords

Horseweed, Conyza canadensis (L.) CronqAerial samplingair-borne arthropodslong-range wind dispersalweedy composites
Type
Research Article
Information
Weed Science , Volume 55 , Issue 2 , April 2007 , pp. 185
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

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