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Articles 1 - 22 of 22
Full-Text Articles in Entire DC Network
Scale And Habitat Effects On Measurement Of Streptomyces Biogeography And Biodiversity, Terilyn A. Stoflet
Scale And Habitat Effects On Measurement Of Streptomyces Biogeography And Biodiversity, Terilyn A. Stoflet
Cal Poly Humboldt theses and projects
Bacteria in the genus Streptomyces are detected in most soils around the world, as well as on and in seeds, plants, animals, insects and the wind. Currently, more than 700 valid species of Streptomyces have been identified worldwide. Streptomyces produce the majority of antibiotics, antivirals and antifungals, as well as important agricultural bioactive molecules due to their unique genetic capabilities. Their distinct genetic abilities allow them to produce an unlimited amount of biosynthetic gene clusters, or BGC’s. Although many compounds come from Streptomyces, scientists have not discovered the biogeographic patterns of this genus. The biogeography of Streptomyces is a …
The Effects Of Native Perennial Cover On Physiological Indicators Of Habitat Quality For Sparrows In California Coastal Prairie Rangelands, Madeleine A. Ybarra
The Effects Of Native Perennial Cover On Physiological Indicators Of Habitat Quality For Sparrows In California Coastal Prairie Rangelands, Madeleine A. Ybarra
Cal Poly Humboldt theses and projects
Prescribed grazing management can have myriad effects on wildlife, with low to moderate grazing being associated with an increased abundance of some grassland birds. Specifically, Grasshopper Sparrow (Ammodramus savannarum) and Savannah Sparrow (Passerculus sandwichensis) abundance have been shown to be positively associated with both grazing and a higher percentage of native plant cover. However, measures of abundance provide an incomplete assessment of habitat quality for birds. Physiological and morphological measurements can help indicate environmental stress in individual birds, which reveals more information about habitat quality. We measured body condition and heterophil:lymphocyte ratios to gauge avian stress …
Community Ecology And Disease Dynamics In Pacific Oysters: Unraveling Microbiome-Pathogen Interactions In The Wild, Victoria E. Cifelli
Community Ecology And Disease Dynamics In Pacific Oysters: Unraveling Microbiome-Pathogen Interactions In The Wild, Victoria E. Cifelli
Cal Poly Humboldt theses and projects
In the context of multispecies microbial assemblages, disruptions can occur when there are alterations in host conditions, such as the onset of a disease. Notably, viruses have the potential to reshape a host's microbial community. However, the role of the host's habitat and environment, which could be pivotal in communities with shifting niche space and habitat filters, is often overlooked in host-microbe-pathogen interactions. Recognizing the importance of these factors, I employed a field-based approach to understand microbial community dynamics in the presence of disease. To address the influence of geographical location, I conducted an analysis involving healthy and infected oysters …
Carnivore And Ungulate Occurrence In A Fire-Prone Region, Sara J. Moriarty-Graves
Carnivore And Ungulate Occurrence In A Fire-Prone Region, Sara J. Moriarty-Graves
Cal Poly Humboldt theses and projects
Increasing fire size and severity in the western United States causes changes to ecosystems, species’ habitat use, and interspecific interactions. Wide-ranging carnivore and ungulate mammalian species and their interactions may be influenced by an increase in fire activity in northern California. Depending on the fire characteristics, ungulates may benefit from burned habitat due to an increase in forage availability, while carnivore species may be differentially impacted, but ultimately driven by bottom-up processes from a shift in prey availability. I used a three-step approach to estimate the single-species occupancy of four large mammal species: mountain lion (Puma concolor), coyote …
Identifying Habitat Suitability And Connectivity For Roosevelt Elk (Cervus Canadensis Roosevelti) On The North Coast Of California, Ashley Ann Harper
Identifying Habitat Suitability And Connectivity For Roosevelt Elk (Cervus Canadensis Roosevelti) On The North Coast Of California, Ashley Ann Harper
Cal Poly Humboldt theses and projects
As human development continues to expand, wildlife managers are faced with problems arising from human-wildlife conflict. To address conflict, it is vital to identify how animals view the landscape and move across areas of differing land use. On the North Coast of California, Roosevelt elk (Cervus canadensis roosevelti) are widely considered to be a valuable resource but are viewed by some as a nuisance due to economic losses caused by property damage. The aim of this study was to identify suitable habitat and movement corridors for Roosevelt elk across Humboldt and Del Norte counties in northern California. Suitable …
The Lumberjack, November 02, 2022
The Lumberjack, November 02, 2022
Cal Poly Humboldt's Student Newspaper
No abstract provided.
Combined Use Of Data From Avian Surveys Along The Pacific Crest Trail With Biodiversity Repositories To Model Habitat Suitability Throughout Northern California, Holli N. Pruhsmeier, Michael C. Mcgrann, Jim Graham
Combined Use Of Data From Avian Surveys Along The Pacific Crest Trail With Biodiversity Repositories To Model Habitat Suitability Throughout Northern California, Holli N. Pruhsmeier, Michael C. Mcgrann, Jim Graham
IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt
Models that describe species distributions are valuable in guiding management decisions. We compared and combined two avian datasets during the 2010 breeding season in northern California, USA. These datasets were a large-scale avian diversity survey from McGrann and Furnas (2016; 2018) and combined data from Biological Information Serving Our Nation (BISON) and Global Biodiversity Information Facility (GBIF). Our objective was to compare the utility of these two datasets, that employ separate field protocols, to model habitat use for the Black-headed Grosbeak, Hairy Woodpecker, and Yellow-rumped Warbler, three common forest birds in our study area that occupy distinctive habitat types. We …
Effects Of Prescribed Fire On Drought Resistance And Recovery In Mixed Conifer Forests Of Lassen Volcanic National Park, California, Zachary J. Wenderott
Effects Of Prescribed Fire On Drought Resistance And Recovery In Mixed Conifer Forests Of Lassen Volcanic National Park, California, Zachary J. Wenderott
Cal Poly Humboldt theses and projects
Forests throughout much of the western United States are experiencing increasing climatic variability, often resulting in decreased forest productivity and elevated likelihood of tree mortality. Severe drought, such California’s recent 2012-2015 drought, are projected to increase in intensity, frequency, and severity throughout much of this region in coming years. Forest management has long relied on prescribed fire and mechanical thinning to reduce fuel loads and ameliorate potential fire hazards. These treatments may also have the ability to reduce stand density, alleviate competitive pressures, and allow residual trees access to critical resources during periods of extreme stress. Utilizing a long-term National …
Phylogenetic And Population Genetic Analysis Of The Humboldt's Flying Squirrel Using High-Throughput Sequencing Data, Stella Chi Yuan
Phylogenetic And Population Genetic Analysis Of The Humboldt's Flying Squirrel Using High-Throughput Sequencing Data, Stella Chi Yuan
Cal Poly Humboldt theses and projects
The intraspecific genetic variation and diversity within the Humboldt’s flying squirrel (Glaucomys oregonensis) has not yet been characterized despite its elevation to full species in 2017. The San Bernardino flying squirrel (G. o. californicus) is thought to be the southernmost population of G. oregonensis and is restricted to the San Bernardino and San Jacinto Mountains in California, but recent surveys indicate they have been extirpated from the latter locality. In order to provide baseline genetic data across the geographic range of G. oregonensis, I had the following objectives: 1) investigate the intraspecific molecular variation in …
Determining Fire Severity Of The Santa Rosa, Ca 2017 Fire, John Cortenbach, Richard Williams, Buddhika Madurapperuma
Determining Fire Severity Of The Santa Rosa, Ca 2017 Fire, John Cortenbach, Richard Williams, Buddhika Madurapperuma
IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt
No abstract provided.
North America Floras, Manuals, & Checklist: A Bibliography, James P. Smith Jr
North America Floras, Manuals, & Checklist: A Bibliography, James P. Smith Jr
Botanical Studies
No abstract provided.
California Floras, Manuals, And Checklists: A Bibliography, James P. Smith Jr
California Floras, Manuals, And Checklists: A Bibliography, James P. Smith Jr
Botanical Studies
No abstract provided.
Ectomycorrhizal Fungal Community Assembly On Seedlings Of A Neotropical Monodominant Tree, Carolyn Delevich
Ectomycorrhizal Fungal Community Assembly On Seedlings Of A Neotropical Monodominant Tree, Carolyn Delevich
Cal Poly Humboldt theses and projects
Formation of ectomycorrhizae may facilitate early seedling survival of ectomycorrhizal tree species due to enhanced nutrient acquisition. This could be especially important in heavily shaded understories of tropical monodominant forests where host plant photosynthetic capacity is limited. Little information is available on ectomycorrhizal (ECM) fungal colonization or community development of monodominant seedling cohorts, which have high survival rates. Following a 2016 mast seeding event, we sequentially measured percent colonization and species composition of ECM fungi on live and recently dead seedlings of the tropical monodominant tree Dicymbe corymbosa. We also compared seedling ECM fungi to those of nearby adult …
Early Results – Salt Marsh Response To Changing Fine Sediment Supply Conditions, Humboldt Bay, Ca, Usgs
Early Results – Salt Marsh Response To Changing Fine Sediment Supply Conditions, Humboldt Bay, Ca, Usgs
State & Federal Reports and Publications
This study uses direct measurements of vertical accretion, marsh elevation change, and suspended-sediment concentrations (SSC) to investigate salt marsh response to changing fine-sediment.
Density And Distribution Of Piscivorous Fishes In The Sacramento – San Joaquin Delta, Christopher M. Loomis
Density And Distribution Of Piscivorous Fishes In The Sacramento – San Joaquin Delta, Christopher M. Loomis
Cal Poly Humboldt theses and projects
Predatory fishes, including numerous introduced species, are common to the Sacramento – San Joaquin Delta, but abundance data for most species is insufficient to determine the Delta-wide distribution and ecological impacts of these species. Predatory fishes (e.g. Striped Bass, Largemouth Bass have long been suspected of contributing to the decline of native species, including salmonids, but data has been insufficient to investigate this hypothesis. In this study, I present a novel method to assess predator fish populations across the southern Delta using DIDSON acoustic cameras and analyze the environmental associations that form the landscape and fine-scale distribution of predatory fishes. …
Developing A Coastal Gis Model Of Sri Lanka To Pinpoint Areas At Risk Of Tsunamis, John E. Dellysse, Buddhika D. Madurapperuma
Developing A Coastal Gis Model Of Sri Lanka To Pinpoint Areas At Risk Of Tsunamis, John E. Dellysse, Buddhika D. Madurapperuma
IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt
No abstract provided.
All-Lands Management: Convening Communities And Their Lands Around Fire Management, Jodie T. Pixley
All-Lands Management: Convening Communities And Their Lands Around Fire Management, Jodie T. Pixley
Cal Poly Humboldt theses and projects
Broadly defined, All-lands Management (ALM) is a land management approach involving collaborative, science-based ecosystem restoration at the landscape scale, across ownership and jurisdictional boundaries. My research investigates collaborative groups working to reduce wildfire risk by applying ALM. Fire risk in the Pacific West (California and Oregon) is increasing in severity and extent due to fire suppression and is exacerbated by the effects of drought, climate change, and expanding residential development. For decades federal, state, and local entities have expressed the need to work collaboratively, across boundaries and ownerships to reintroduce fire back onto the landscape to restore forest resiliency. This …
The Bee Fauna Of The Horse Mountain And Grouse Mountain Region, Humboldt County, California, Carrie Lopez
The Bee Fauna Of The Horse Mountain And Grouse Mountain Region, Humboldt County, California, Carrie Lopez
Cal Poly Humboldt theses and projects
Recent concerns about the ecological well-being of bee communities in California and elsewhere have increased the need for monitoring programs and studies that evaluate the impact of habitat loss and alteration on bee diversity and abundance. Such studies depend critically on the expertise of people trained in taxonomy, but their numbers have declined in recent years. My primary goal was to gain a comprehensive first-hand experience with bee identification by documenting the fauna of a previously unstudied area in the mountains of northwestern California and by writing an identification key, intended for dedicated non-specialists, to the area’s 35 species of …
Seasonal Habitat Selection Of The North American Porcupine (Erethizon Dorsatum) In A Coastal Dune Forest, Cara L. Appel
Seasonal Habitat Selection Of The North American Porcupine (Erethizon Dorsatum) In A Coastal Dune Forest, Cara L. Appel
Cal Poly Humboldt theses and projects
Wildlife-habitat relationship studies are important for understanding the factors that determine where species occur in space and time. Habitat selection by generalist species should be studied on fine spatial and temporal scales to avoid masking important differences between seasons, localities, or orders of selection. I conducted the first study of habitat use and general ecology of North American porcupines (Erethizon dorsatum) in a coastal dune environment. Specifically, I assessed changes in body mass, home range size, and habitat selection in relation to the potential for seasonal nutritional and survival bottlenecks as reported elsewhere. Although they are considered generalists, …
Vascular Plants Of The Russian Peak Area Siskiyou County, California, James P. Smith Jr, John O. Sawyer Jr.
Vascular Plants Of The Russian Peak Area Siskiyou County, California, James P. Smith Jr, John O. Sawyer Jr.
Botanical Studies
No abstract provided.
The Lumberjack, April 19, 1968
The Lumberjack, April 19, 1968
Cal Poly Humboldt's Student Newspaper
The student newspaper of Humboldt State University.
The Lumberjack, March 06, 1953
The Lumberjack, March 06, 1953
Cal Poly Humboldt's Student Newspaper
The student newspaper of Humboldt State University.