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Soil Seed Bank Changes after Forest Clearing and Agricultural Use in Alaska

Published online by Cambridge University Press:  12 June 2017

Jeffery S. Conn ,
Catherine L. Cochrane  and
John A. Delapp
Jeffery S. Conn
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Univ. of Alaska, Fairbanks, AK 99701
Catherine L. Cochrane
Affiliation:
Agr. Exp. Stn., Univ. of Alaska, Fairbanks, AK 99701
John A. Delapp
Affiliation:
Agr. Exp. Stn., Univ. of Alaska, Fairbanks, AK 99701
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Abstract

Soil samples representing a time series from forest before clearing to land in cultivation for 20 yr were taken near Delta Junction, AK, to determine the changes that occur in the soil seed bank following clearing and agricultural use. The total number of seed was initially low in the forested sites but increased after 3 to 5 yr in cultivation due to seed production by native colonizers and by introduced weeds such as common lambsquarters (Chenopodium album L. ♯3 CHEAL). Viability of seed of several mature forest species was low. There was a shift from a seed bank dominated by native species in the forest and newly cleared sites to a seed bank dominated by introduced colonizers in the older fields. Although seed of introduced species increased in importance over time, native species, especially native colonizers, continued to be an important component of the seed bank throughout the 20-yr period represented.

Keywords

Weed shifts
Type
Weed Biology and Ecology
Information
Weed Science , Volume 32 , Issue 3 , May 1984 , pp. 343 - 347
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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