Understory

Scott Camp Creek Research Natural Area lies at the head of Scott Camp Creek, which drains northeast into Siskiyou Lake. It contains four permanent or intermittent small lakes and four marshes/meadows. Scott Camp Creek RNA contains a high concentration of distinctive botanical features including high elevation Port-Orford-cedar stands, four California Native Plant Society-listed rare vascular plants, well-developed fen and aquatic habitats, extensive mixed conifer forest on both gabbro and serpentinite rock types, well-developed alpine talus and scree, montane chaparral, and red fir plant assoc...

The FIA Annual Business Reports evaluate the performance of the FIA program to ensure accountability and transparency to FIA partners, supporters and customers. Modeled on a corporate business report, they contain basic business information about the FIA program including accomplishments, performance measures, plans for the next fiscal year, agreements with other parties, and basic financial and staffing data. These reports are prepared by the National Office staff of the FIA Program, U.S. Department of Agriculture, Forest Service, Washington, DC.See more information for fiscal years 2021 and ...

The usual analysis of paired-watershed studies is simple and conclusions are consequently very limited. Linear regression models are computed, relating a response in two similar watersheds, before and after a land treatment is applied to one of them. If there is a significant difference between the regression lines, then the treatment is deemed to have had an effect, and the size of the effect is estimated as the average change in response. Sometimes the magnitude of the effect is estimated for different event size classes after testing subsets of events, but the sample sizes are often too sma...

The Sugar Creek Research Natural Area is distinguished by its exceptional diversity of conifers, unsurpassed in the world. It is also notable for its well-developed and varied Sierran mixed-conifer forest on lower elevation slopes. The area occupies the entire upper watershed of Sugar Creek, thus including portions of all four major vegetation zones characteristic of the mid- to upper elevations of the eastern Klamath Mountains.The area is underlain entirely by granitic rock. Therefore, diversity of plant associations and species is not related to a diversity of parent materials, as is often t...

The FIA Annual Business Reports evaluate the performance of the FIA program to ensure accountability and transparency to FIA partners, supporters and customers. Modeled on a corporate business report, they contain basic business information about the FIA program including accomplishments, performance measures, plans for the next fiscal year, agreements with other parties, and basic financial and staffing data. These reports are prepared by the National Office staff of the FIA Program, U.S. Department of Agriculture, Forest Service, Washington, DC.See more information for fiscal years 2021 and ...

The purpose of this research was to develop a modeling system/framework for assessing forest management-related erosion at its sources and tracking sediment as it is transported from hillslopes to stream channels, and transported through a channel network to a watershed outlet. The ultimate goal was to develop a land management assessment tool capable of accurately assessing the primary impacts of spatiotemporally varied forest management practices on sediment yield and delivery at hillslope- and watershed-scales.The modeling framework developed consists of four components: 1) the TOpographic ...

Accurate assessment of forest management practices on sediment yield and delivery requires the use of physically based simulation models. Upland erosion rates are commonly simulated with the Water Erosion Prediction Project (WEPP) model. Since the WEPP was designed to evaluate erosion rates from fields and small watersheds without stream channels, it does not simulate hydrodynamics or sediment transport (especially important in watersheds larger than approximately one square mile). To resolve this problem, WEPP was linked via an interface program to CCHE1D, a one-dimensional, channel network, ...

We developed and evaluated a stratified index redd area method to estimate Chinook salmon Oncorhynchus tshawytscha, coho salmon O. kisutch, and steelhead O. mykiss escapement in several coastal streams in northern California based on the assumption that redd size is related to the number of redds a female builds. Sources of error in redd counts were identified, including the use of logistic regression to classify redd species (necessary due to temporal overlap in the spawning of these species in coastal northern California). Redd area escapement estimates were compared with estimates from more...

Finney, M. A. 2005. The challenge of quantitative risk analysis for wildland fire. Forest Ecology & Management 211: 97-108.