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Response of Giant Reed (Arundo donax) to Intermittent Shading

Published online by Cambridge University Press:  20 January 2017

David F. Spencer*
Affiliation:
USDA-ARS, Exotic and Invasive Weeds Research Unit, Department of Plant Sciences, University of California, Davis, MS 4, One Shields Avenue, Davis, CA 95616
*
Corresponding author's E-mail: david.spencer@ars.usda.gov

Abstract

A species' successful invasion into a new site depends on its ability to persist in the local environment. An experiment was conducted to examine the response of giant reed to intermittent periods of shading for 2 yr. Results indicate that giant reed persisted when exposed to significant shading (i.e., 90% reduction of full sun) and that shading also caused changes in a number of plant characteristics, such as stem height, internode length, leaf nitrogen, leaf chlorophyll content, specific leaf area, total leaf area per plant, and leaf life span. Estimates of leaf photosynthetic rates did not differ across shade levels. Giant reed's ability to persist and grow under intermittent low-light conditions implies that plants would be poised to take advantage of sun flecks and disturbances that create gaps within the resident plant community.

Type
Research
Copyright
Copyright © Weed Science Society of America 

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