Humboldt Bay
http://hdl.handle.net/2148/209
2024-03-29T09:03:43ZTreatments for hinge ligament disease in juvenile Pacific oysters (Crassostrea gigas)
http://hdl.handle.net/10211.3/207189
Treatments for hinge ligament disease in juvenile Pacific oysters (Crassostrea gigas)
Rich, Kimberly Suzanne
Cytophaga-like bacteria are the known etiological agent responsible for hinge ligament disease in juvenile Pacific oysters (Crassostrea gigas). An economically viable, natural way to manage this disease has not been documented. In vitro efficacy of hydrogen peroxide, CitroBio and ozone were determined for one strain (C1B-2) of Cytophaga-like bacteria. In vitro results showed that the CLB strain had the greatest sensitivity to CitroBio at 1000 ppm after 30 seconds. In vivo trials with hydrogen peroxide and extensive histological work failed to show a decrease in hinge ligament erosion. Approximately 71-74% of juvenile C. gigas were observed with ligament erosion at the conclusion of field trials. No serious pathological conditions resulting from a weakened hinge ligament were observed. No mortality nor negative effects on growth were noted as a result of treatment with hydrogen peroxide. In vitro results suggest further testing with CitroBio would be of benefit.
Thesis (M.S.)--Humboldt State University, Natural Resources: Fisheries Biology, 2006
2006-12-01T00:00:00ZThe role of Fort Humboldt during the California gold rush: a focus on local indigenous women’s struggle, resistance and resilience
http://hdl.handle.net/10211.3/176139
The role of Fort Humboldt during the California gold rush: a focus on local indigenous women’s struggle, resistance and resilience
Oros, Chisa
The California Gold Rush was instrumental in the growth and creation of the American West. The sudden influx of settlers and the myriad of impacts of mining and settler community formation on the environment and Indigenous peoples drastically changed the Humboldt Bay region forever. The resulting clash of settler culture and existing Indigenous peoples enabled the United States government to rationalize establishing Fort Humboldt and militarizing the Humboldt Bay region. The realities of militarization, especially for Indigenous women, are rarely discussed in dominant history curricula in the United States, and throughout the world. In my research, I utilize the framework of Intersectional Feminism and the tool of discourse analysis to critically examine archival and historical texts and the impacts of hegemonic narratives like Manifest Destiny and associated frontier ideologies. In addition, I use semi-structured interviews to critically analyze and make visible local Indigenous knowledge, traditions, and forms of resistance and resilience. I do so in order to help shed light on systematically invisabilized stories of Fort Humboldt and Humboldt Bay militarization that provide counter-hegemonic narratives about the role of the fort, and its impacts on Indigenous women in particular. Finally, my research is guided by three main themes with respect to the consequences of militarizing the Humboldt Bay region: its impacts on the environment and on the natural world, and on the physical body, and on spiritual health of Indigenous women. Research findings indicate a strong presence of region-specific Indigenous oral histories and reveal information that directly challenges dominant U.S. educational models concerning the impacts of the Gold Rush on Indigenous peoples. Deconstructing this history and developing a more complex understanding of the impacts of militarization in the Humboldt Bay region is a crucial part of healing among Indigenous communities. The same holds true for elucidating stories of resilience and hope; recognizing ongoing struggles among Indigenous peoples; and both understanding forms of, and resistance to, the inter-generational trauma that continue to impacts Indigenous communities today. I argue that all of the aforementioned play a crucial role in not only genuine, long-term healing, but is essential for true self-determination, and the ability for Indigenous communities in this region to flourish.
Thesis (M.A.)--Humboldt State University, Social Science: Environment and Community, 2016
2016-05-01T00:00:00ZStructure and dynamics of a coastal dune forest at Humboldt Bay, California
http://hdl.handle.net/10211.3/161079
Structure and dynamics of a coastal dune forest at Humboldt Bay, California
Green, Shayne
Forest stands occurring on coastal dunes along the western margin of Humboldt Bay, California are isolated fragments of a regional forest type that stretches discontinuously along the Pacific Coast from northern California to Alaska. I used aerial photographs to stratify the forest at Lanphere Dunes into 3 stand types. Using fixed-radius (13.2 m) circular plots, I sampled these types to determine their composition (overstory and understory), size structure (basal area, height, and sapling, seedling, snag and tree density), and age structure.
Beach pine, Sitka spruce, and mixed-species types exhibit significant compositional and structural differences. The beach pine type is distinguished not only by the importance of beach pine in the overstory, but by high stem density, low basal area, and the overall importance of bearberry in the understory. The Sitka spruce type is characterized by the importance of Sitka spruce in the overstory, low stem density, high basal area, and the importance of twinberry and wax myrtle in the understory. In the mixed-species type, beach pine and Sitka spruce are almost equally important among an overstory layer that often includes grand fir. This type exhibits stem density and basal area values intermediate to those of the other two types.
Age structure differences among the types are non-significant, suggesting that each type has a similar disturbance history as the others. Within each type, beach pine and/or Sitka spruce populations consist of numerous age classes that are normally distributed. Age class chronologies correspond (in part) among types and among spatially disjunct plots of the pine type. Small patches of forest (<0.04 ha) typically include trees representing numerous age classes, and age class distributions (i.e. number and size) vary over larger areas. Patch dynamics are apparently complex and affect forest development at a variety of spatial and temporal scales.
These age and spatial patterns support the hypothesis that small-scale windfall events have been the most important disturbance factor underlying seedling establishment over the last 150 years. Though regeneration levels are currently low, beach pine stands generally appear to be self-replacing over a period of many decades.
Thesis (M.A.)--Humboldt State University, Biology, 1999
1999-12-01T00:00:00ZVertebrate response to a tidal marsh restoration in Humboldt Bay, California
http://hdl.handle.net/10211.3/161038
Vertebrate response to a tidal marsh restoration in Humboldt Bay, California
Jacobson, Sandra L.
A 5.5-ha abandoned log pond (originally salt marsh) at the end of Park Street, Eureka, California was chosen as the off-site mitigation area for the destruction of 6.8 ha of wildlife habitat during the construction of the Woodley Island marina. Passive saltmarsh restoration was attempted by breaching a dike separating the log pond from Freshwater Slough (an estuary of Humboldt Bay) in December 1980, thus allowing the periodic tidal intrusion of salt water into 3.8 ha of the area. This study measured the response of amphibians, reptiles, birds, and mammals to the change in vegetation and other habitat conditions brought about by the reestablishment of tidal action. Previously, in August 1979 an interior dike had been constructed within a portion of the mitigation area to enhance an existing 0.7-ha freshwater marsh, and the effect of this change on the vertebrate life also was appraised.
Frogs disappeared and snakes declined in numbers within the tidal portion of the mitigation area after the dike was breached. Savannah Sparrows (Passerculus sandwichensis) were the most common birds in the grassland of the dried log pond before breaching, and declined after breaching. Several species of shorebirds and the Snowy Egret (Egretta thula) increased their use of the tidal portion of the mitigation area after breaching. Small mammals such as California Vole (Microtus californicus), Vagrant Shrew (Sorex vagrans), and Western Harvest Mouse (Reithrodontomys megalotis) were common before breaching, but declined in numbers in the first month after breaching. Use of the area by the most common large mammal, the Domestic Dog (Canis familiaris), increased after breaching because people used the flooded marsh to train retrievers.
Within the freshwater marsh five species of birds showed significant increases in numbers during subsequent corresponding seasons, whereas one species showed a significant decrease in numbers.
The success of the restoration after breaching was not fully known at the end of 1.5 years of study, but the trend was towards a renewed, vigorous salt marsh. In addition, the interior dike construction enhanced the freshwater marsh. In the interim the tidal and freshwater marshes provided valuable foraging areas for many species of wetland birds, and the freshwater marsh also served as a nesting area for certain bird species.
Thesis (M.S.)--Humboldt State University, Wildlife Management, 1986
1986-12-01T00:00:00Z