Point data that are collected during a soil survey are aggregated into conceptual map units and portrayed on maps. There is no extensive geographic method to provide information about the relationships between soil-forming factors and soil properties. . . .

Old-growth coastal redwood stands and the habitat they provide are the conservation target of Redwood National and State Parks (RNSP) in northern California. In recent years there has been greater access to location information about record-sized tree . . .

Subaerial beach sediments were sampled at 80 stations along 62 kilometers of the central Humboldt County shoreline. Samples were taken during winter and summer to represent both the fully eroded and fully accreted conditions of the beach. Beach sample . . .

I determined if local coho salmon (Oncorhynchus kisutch), Chinook salmon (O. tshawytscha), and steelhead trout (O. mykiss) redd location is dependent upon permeability of the streambed. The study took place in four coastal drainages in northern Humbol . . .

Two environmental models were created to predict the occurrence of closed-cone pine (knobcone & lodgepole) stands and to assess fire hazard in the Smith River National Recreation Area (SRNRA), Six Rivers National Forest. Both models integrated Landsat . . .

Foragers may use a number of strategies to choose among alternative food items: choosing randomly, sampling to a fixed threshold, or taking the best out of a subset. Little is known about individuals’ consistency in employing these strategies and whet . . .

Streams have a diurnal fluctuation in quantity of flow that corresponds with rates of evapotranspiration. As much as 45% of water consumed by California coastal redwoods (Sequoia sempervirens) appears to come from fog. The relation between fog and gag . . .

Taylor Creek is located in the Lake Tahoe basin and drains into Lake Tahoe. A beaver colony in Taylor Wetland has built 14 dams along Taylor Creek and in the wetland, creating nine beaver ponds upstream. All of the dams in the main channel of Taylor C . . .

Pronounced seasonality in rainfall and consequently streamflow are natural components of a Mediterranean climate, and increases in human population, water use, and climate change have the potential to further increase water stress and scarcity in Medi . . .

Plant available phosphorus (P) occurs in anionic forms which become unavailable (retained) when iron and aluminum oxides form insoluble phosphate complexes. P-retention is especially likely to occur under acid conditions in soils containing short rang . . .

Headwaters Forest Reserve (HFR) has existed since 1999, when the Bureau of Land Management purchased remnants of old-growth forestland from Pacific Lumber Company. The area provides numerous recreation opportunities, including hiking and dog walking. . . .

Grazing allotment records for the Mad River Ranger District (MRRD), Six Rivers National Forest (SRNF), Humboldt County, CA were used to derive two grazing allotment subsets indicative of historical grazing pressure. The LOW grazed-class was represente . . .

Black-tailed deer (Odocoileus hemionus columbianus) of Washington State have existed with hair loss syndrome (HLS) since 1996. I looked at the effects of HLS on individual fawns by estimating survival rates, time budgets associated with feeding and sc . . .

Extinction rates of plants and animals are currently far in excess of speciation rates. Greatly increased rates of biological invasions, especially species introduced by humans, are a major factor in this mass extinction. Public awareness about this g . . .

Southern Sierra fisher (Martes pennanti) populations currently pose a management challenge for forest managers whose goals of forest fuels reduction often conflict with elements of fisher habitat conservation. My research draws upon Sierra National Fo . . .

Managers of the King Range National Conservation Area in California completed a general management plan in 2005 that designated the Lost Coast Trail to be managed for high levels of solitude with low levels of visitor encounters. However, visitor use . . .

Private pasture lands managed with rotational grazing practices for beef cattle production are being utilized by Aleutian cackling geese (Branta hutchinsii leucopareia) during their annual migration through northern California. Continued growth in the . . .

Abstract, Navigating nineteenth century novels : linking historical and literary perspectives to explore the influence of dime novels in nineteenth century America. To set the context, this study will compare what has been written about three layers o . . .

The economy of Humboldt County, California, is dependent on substantial amounts of aggregate skimmed from the local gravel bars, but National Marine Fisheries states that the extraction produces excessive fine sediments, which disrupt salmon behavior, . . .

In recent decades rapid environmental change has led to significant shifts in forest dynamics across the western United States. In particular, fire exclusion has led to denser forests with higher competitive stress, and climate change has increased te . . .

Phytophagous arthropod consumption by birds and bats has been shown to initiate top-down cascading effects that reduce plant damage or accelerate plant growth in terrestrial ecosystems. Birds and bats attracted to ecological restoration sites can pote . . .

Despite widespread concern regarding the impacts of invasive non-native vegetation on native salt marsh ecosystems, research investigating the effects of the Spartina densiflora invasion in Humboldt Bay on terrestrial invertebrate assemblages is non-e . . .

Riparian timber harvest buffer policy in California has grown increasingly complex since its creation in 1972, seeking to prevent cumulative watershed effects from logging on private lands. Originally implemented to mitigate sediment inputs into water . . .

The majority of coastal redwood forests are young (< 50 yr old), dense even-aged forests with historically unprecedented high densities of Douglas-fir. These second-growth forests offer diminished biological diversity and wildilife habitat value than . . .

The American marten (Martes americana) has experienced an apparent loss of occupied range over the last 75 years in northeastern California. Extinction selectivity, or relative vulnerability, is non-random and individual traits make some species more . . .

In this study, I quantified particulate organic matter and total suspended sediment (TSS) discharged during four storms from six tributaries of the Mattole River in northern California during the 2012 hydrological year. The six catchments ranged in si . . .

Wildfire disturbances in riparian areas can impact stream chemistry, primary production, and trophic dynamics for years to decades after burning. Previous studies in headwater streams have focused on immediate and short term impacts, while effects dur . . .

The purpose of this study was to investigate basal area growth in coast redwood (Sequoia sempervirens) along a ten mile east-west gradient in Mendocino County, California, USA, following herbicide treatment of tanoak (Notholithocarpus densiflorus) and . . .

There is a growing body of research related to the human dimensions of MPAs, and research shows that social elements can be just as important to MPA success as the biological ones. This thesis describes research focused on the MPA network developed in . . .

The social movement and political process surrounding logging old-growth redwood stands on private property that eventually led to the creation of the BLM managed Headwaters Forest Reserve (Headwaters) made Humboldt County, California a focal point of . . .

In order to restore and maintain natural ecosystems in wilderness areas, it is crucial that land managers understand which ecosystems are most threatened by invasive plant species and where to search for new infestations. Limited personnel resources a . . .

Landsat digital data was analyzed using EDITOR software to map land condition and vegetative cover of the Hoopa Valley Indian Reservation in northern California. Guided clustering was employed to identify the maximum number of spectral classes within . . .

Directly connected impervious areas collect and deliver unfiltered runoff to modified and impacted urban waterways. Modeling flow over the landscape is an effective method of observing drainage patterns and predicting peak runoff levels. Model improve . . .

Elementary school classes regularly attend natural resource interpretation programs and activities. Interpretive field trips are commonly included throughout elementary education as a way to get students out of the classroom into a different setting a . . .

We studied branching in Sequoia sempervirens (coast redwood) and Pseudotsuga menziesii var.menziesii (coastal Douglas-fir) because of their widespread commercial and ecological value to coastal northern California. We focused our research on branching . . .

This study was conducted to model the extent of eelgrass habitat in Humboldt Bay, California through physical surveys of the maximum depths and upper limits of growth in conjunction with recently acquired high-resolution bathymetry data and supplement . . .

Yosemite National Park uses a trailhead quota system to manage wilderness visitors. Park scientists set user carrying capacities in the 1970s for backcountry zones and trailhead quotas from prevalent travel patterns and a computer simulation model. Li . . .

Industrial timberland managers and biomass contractors are faced with a variety of challenges when implementing biomass recovery operations in mountainous terrain. Recent studies found that a centralized grinding supply chain that utilizes modified du . . .

The old-growth redwood (Sequoia sempervirens) forest associations of the Little Lost Man Creek Research Natural Area in Redwood National Park, CA, were defined by this study. Eighty stands on a systematic sample grid were inventoried using releve-styl . . .

A computer model has been constructed to examine the relationship between the tidal cycle and potential phytoplankton productivity in Arcata Bay. The results of the model indicate that the timing of the tidal cycle relative to solar noon can affect gr . . .

Hand-held information and communication technology such as cell phones, Smartphones, satellite phones, personal locator beacons (PLBs) and Global Positioning System (GPS) units, have become a part our everyday lives for both informational and communic . . .

Effective management of threatened bird populations relies on identifying factors contributing to population limitation and ameliorating those factors. The U.S. Fish and Wildlife Service identified three factors acting to limit productivity of the Wes . . .

Comprehensive primary productivity measurements of the impact of invasive species are important environmental indicators. This study obtained measurements of the impact of invasive Spartina densiflora on the primary productivity of a Humboldt Bay (Cal . . .

While tree-level productivity is largely determined by crown size and aboveground vigor (i.e., independent dimensions of tree structure), light availability ultimately controls growth rate. Competition indices are typically used in modeling instead of . . .

The Klamath River basin encompasses 10 million acres in Northern California and Southern Oregon. Salmon decline, coupled with impacts to other beneficial uses, have prompted regulatory agencies to list several rivers as impaired under the Federal Clea . . .

Over the past few decades, the frequency and number of large fires has increased in the western United States. The objective of this study was to evaluate the patterns and drivers of reburn severity in the Klamath Mountains ecoregion over a 30 year ch . . .

Breeding population estimates of the Cassin’s Auklet (Ptychoramphus aleuticus) and Rhinoceros Auklet (Cerorhinca monocerata) on Castle Rock National Wildlife Refuge are hindered by nocturnal colony activity and burrow-nesting habits. Additionally, Cas . . .

Three ponds were constructed in gravel bars along the lower Mad River in Humboldt County, California. They were excavated in the gravel bars to mitigate impacts on salmonid spawning habitat in the main channel and allow for the removal of gravel for c . . .

Managers at Humboldt Redwoods State Park, California, were concerned about sewage leach field seepage into Albee and Cuneo Creeks which are tributaries to Bull Creek. Human fecal wastes in Humboldt Redwood State Park are treated by on-site septic syst . . .

A study to determine the migration and wintering ground distribution, ecology, and population status of the endangered Aleutian Canada goose (Branta canadensis leucopareia) was conducted from October 1975 to May 1978. Field investigations extended fro . . .