Effects of current velocity and substrate composition on growth of Texas wild rice (Zizania texana).


Material Information

Effects of current velocity and substrate composition on growth of Texas wild rice (Zizania texana).
Series Title:
Aquatic Botany
Power, Paula
Publication Date:


Subjects / Keywords:
Current Velocity ( local )
Endangered ( local )
Macrophyte ( local )
Photosynthesis ( local )
Texas Wildrice ( local )
Sediment ( local )
Zizania Texana ( local )
serial ( sobekcm )


Zizania texana Hitchc., an endangered macrophyte has declined in number during the past 50 years. To determine the effects of substrate composition and current velocity on plant growth, plants were grown in pots containing either fine or coarse sediment at three sites in Spring Lake, Hays Co., TX. Each site was similar in depth but differed in current velocity. Plants were allowed to grow for 6 weeks and then harvested. Growth was greater on fine sediments. There was significant interaction between flow and sediment with respect to aboveground biomass and stem density and, there was significant flow effect on leaf length and stem density. Stem density was greater in fast flowing water (0.40–0.49 m s−1) than either moderate (0.12–0.24 m s−1) or slow flowing (0.05–0.12 m s−1) water. The decline in Zizania texana population can be attributed, in part, to physical changes to Zizania texana habitat.
Original Version:
Aquatic Botany, Vol. 55, no. 3 (1996-11).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

USFLDC Membership

University of South Florida
Karst Information Portal

Postcard Information



Download Options


No images or PDF downloads are available for this resource.

Cite this item close


Cras ut cursus ante, a fringilla nunc. Mauris lorem nunc, cursus sit amet enim ac, vehicula vestibulum mi. Mauris viverra nisl vel enim faucibus porta. Praesent sit amet ornare diam, non finibus nulla.


Cras efficitur magna et sapien varius, luctus ullamcorper dolor convallis. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Fusce sit amet justo ut erat laoreet congue sed a ante.


Phasellus ornare in augue eu imperdiet. Donec malesuada sapien ante, at vehicula orci tempor molestie. Proin vitae urna elit. Pellentesque vitae nisi et diam euismod malesuada aliquet non erat.


Nunc fringilla dolor ut dictum placerat. Proin ac neque rutrum, consectetur ligula id, laoreet ligula. Nulla lorem massa, consectetur vitae consequat in, lobortis at dolor. Nunc sed leo odio.