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| Biologists
monitor effects of cheatgrass controls |
Invasive species are one
of the leading challenges for natural resource protection. They
degrade native habitats, threatening fish and wildlife, with potential
to alter entire ecosystems. There are several species invading various
habitats on the Refuge. Many of the wetland and riparian woodlands
are being invaded by saltcedar, Russian olive, purple loosestrife
and bull frogs. In the shrub steppe habitat the invasive specie
of primary concern is cheatgrass. Many approaches and techniques
are used to control these species, including application of chemicals,
mechanical removal, prescribed burning, and biological control.
For more information about invasive species management contact
the Refuge office. |
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Cheatgrass
Management |
| Cheatgrass
is the most common and widespread invasive species on the Refuge.
Compared to native bunchgrasses, this contiguous ground cover fuels
larger and more intense wildfires. Cooperative research aimed at
reducing wildfire risk in shrub-steppe has been ongoing with Washington
State University Tricities. This research has focused on reducing
invasive cheatgrass and restoring sustainable native plant communities.
Research results available at http://www.tricity.wsu.edu/shrub_steppe/fire_publications.htm |
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