Riparian Woodland Restoration Project
Final rept. 1 Oct 1999-30 Sep 2002
CALIFORNIA STATE UNIV CHICO
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The purpose of this project was to plant native woody species on a 15.6-acre parcel of land in the Lower Dry Creek area of Beale Air Force Base in Northern California, while simultaneously investigating some factors plant age, plant protection that are thought to contribute to efficient riparian restoration and to affect plant performance. The project was funded 49,500.00 by the U.S. Army Medical Research Acquisition Activity USAMRAA for the period from Oct. 1999 to Sept. 2002. None of the factors investigated proved to be consistently associated with high survivorship or favorable plant growth at one site the least expensive tree protector resulted in highest survivorship, while at the other site, the highest-input protector was most effective. Similarly, the effect of plant age varied from field to field. Not surprisingly, plant growth as measured in height was consistently greater with the taller tree protectors. Valley oak survival rates of 34 were attained in this study a previous restoration conducted by the author in adjacent fields with similar methodology resulted in valley oak survival rates between 50 and 75. The low survival rates and highly variable results between fields are attributed largely to herbivory gophers and field mice and weather-related effects.