Fire and Invasive Annual Grasses in Western Ecosystem
A project funded by the Joint
Fire Science Program
Soil seedbanks are being grown out in the greenhouse to assess community
composition and diversity. Soil samples are collected between the months
of September and November, prior to the first winter precipitation event.
Rocks larger than 1/4 inch in diameter are sifted out and vermiculite
is added to soil and individual soil pots are randomly placed
in a greenhouse
for germination treatments.
Treatments
Treatments include four watering cycles each followed a dry cycle. The
first two treatments consist of water. The third treatment adds nitrogen
to the water. The fourth treatment of gibberellic acid has
been shown to stimulate germination.
Data
Data is collected as soon as the cotyledons are large enough to differentiate.
Individual plants are observed and photographed throughout all stages
of development. Plants are keyed out to species, pressed, mounted,
and stored in a herbarium.
URL http://www.werc.usgs.gov/fire/lv/fireandinvasives/
seedbank_analyses.htm Contact: Webmaster Last Modification: July 21, 2004 |
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