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Emergence of the Introduced Grass Agropyron cristatum and the Native Grass Bouteloua gracilis in a Mixed‐grass Prairie Restoration by Laura G. Ambrose; Scott D. Wilson is a Environmental Science article available to read on EtoBox.

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**Abstract** Prairie restoration at the northern edge of the Great Plains can be frustrated by previously established non‐native perennial grasses. We compared the emergence of a widely introduced grass, __Agropyron cristatum__, and a common native grass, __Bouteloua gracilis__, in a 4‐year‐old field experiment in which the __Agropyron__‐dominated vegetation had either been left intact or treated annually with herbicide. This was done at two levels of water supply, reflecting conditions expected in wet and dry years, to examine the effects of among‐year variability in precipitation. Water addition significantly increased the emergence of both surface‐sown and buried (1 cm deep) seeds. Herbicide treatment of neighbors did not increase the emergence of experimentally added seeds. Emergence was much greater for buried (80%) than surface‐sown seeds (20%). Significantly more __Bouteloua__ than __Agropyron__ germinated from experimentally buried seeds. Whereas only a single seedling of __Bouteloua__ emerged from the existing seed bank, the mean density of __Agropyron__ seedlings emerging from the seed bank was 930/m^2^ (range, 0 to 6,455/m^2^). Surprisingly, the emergence of __Agropyron_

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Author

Laura G. Ambrose; Scott D. Wilson

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 1061-2971)

Published

2003

Language

EN

Field

Environmental Science (Physical Sciences)