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Germinability of Seed Reserves in a Big Sagebrush Community

Published online by Cambridge University Press:  12 June 2017

James A. Young  and
Raymond A. Evans
James A. Young
Affiliation:
Range Sci., Agr. Res. Serv., U.S. Dep. Agr. Renewable Res. Center, Univ. of Nevada, Reno, NV 89502
Raymond A. Evans
Affiliation:
Range Sci., Agr. Res. Serv., U.S. Dep. Agr. Renewable Res. Center, Univ. of Nevada, Reno, NV 89502
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Abstract

We investigated seasonal variation in germinability of seed reserves in a degraded big sagebrush (Artemisia tridentata Nutt.) community. A bioassay was employed to determine germinability. There were many more germinable seeds and seedling establishment was greater under the shrub canopies than in the interspace. Caryopses of downy brome (Bromus tectorum L.) were the most abundant of any species in the litter where most of the seeds were located. Seasonal germinability of downy brome caryopses depends on the environment of the seedbed when the samples were collected and on the incidence of environmentally-induced dormancy or on loss of dormancy.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 5 , September 1975 , pp. 358 - 364
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

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