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RISS 인기검색어
- 검색키워드
- 저자 : Cruz, Gregory Dela (검색결과 379 건)
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Linking invasive plant management, conservation, and restoration on Santa Cruz Island, California
Colvin, Wesley I., III University of California, Santa Cruz 2007 해외공개박사
Invasive species management is expensive. While the precautionary principle advocates a proactive posture towards the eradication of such species, there is little empirical evidence to support this effort. Natural resource managers can not afford to waste financial resources on weed management protocols that promote unanticipated outcomes. By examining fennel (Foeniculum vulgare ) management on Santa Cruz Island, California, from three perspectives, I intend to advocate an ecological framework for weed management. First, a critical discourse analysis (CDA) of the Santa Cruz Island Primary Restoration Plan-Final Environmental Impact Statement revealed that the underlying scientific assumptions and personal bias related to the use of prescribed-fire and aerial herbicide application for fennel management failed to provide hypothesized results. Second, two long-term field studies, The Nature Conservancy's Central Valley Fennel Removal Experiment and the University of California at Santa Cruz's Natural History Field Quarter (NHFQ) Fennel Project, focused on the response of vegetation guilds of introduced and native origin to restoration disturbances that occurred over three and sixteen-year time frames, respectively. These two community ecology approaches followed changes in ecosystem structure and function as a result of different field manipulations to fennel. The NHFQ Fennel Project also evaluated the short- and long-term impacts to ecosystem structure and function by disturbance from feral pig presence and absence. Canonical Correlation Analysis determined that a significant relationship exists between fennel presence and increased soil fertility in the Central Valley of the Island. Weed seed bank analysis determined that fennel seed was still viable in the soil after five years suggesting that prescribed burns do not provide either the temperature intensity or duration required to terminate all fennel seeds in situ. Productivity of fennel declined when left alone for 16 years. Abundance and richness of introduced species increased when fennel was managed. Third, the allelopathic potential of fennel was evaluated against a suite of species from introduced and native origin. It was learned that allelopathic interference was most negative for growth of introduced species with little significance for introduced species germination, and allelopathic interference was most negative for germination of native species with little significance for native species growth.
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Perg, Lesley Anne University of California, Santa Cruz 2001 해외박사(DDOD)
Tracing sediment movement between linked geomorphic systems represents a large challenge for the geomorphic community. In this dissertation I address one such system, the actively uplifting coastline near Santa Cruz, California, in which the generation, storage, and transport of sediment must all be documented. The terrain is characterized by broad flat marine terraces, steep fluvial basins, and narrow discontinuous beaches. I use in-situ cosmogenic radionuclides to constrain the timing and linkages between processes involved in long-term landscape evolution. Cosmogenic radionuclides are used to date surfaces that are hundreds of thousands of years old, and to determine erosion rates and track sediment inputs over timescales that are much longer than historic records. Their longer record integrates over long timespans that both include rare large events and reduce the importance of recent anthropogenic modifications. In this study I demonstrate the use of cosmogenic radionuclides in simultaneously probing the terrace, fluvial and littoral systems along the Santa Cruz coastline. Specifically, I use <super>10</super>Be and <super>26</super>Al concentrations measured in sand-sized quartz to examine rates of sediment production in fluvial basins, to determine beach concentrations from past sea-level highstands and the duration of sediment storage on marine terraces, and to constrain fluvial and cliff-derived sediment inputs to the littoral cell. The cosmogenic radionuclide dates of the five major Santa Cruz terraces correlate to marine oxygen isotope stages 3, 5a, 5c, 5e, and 7. These are considerably younger than suggested in any previous work; the implied uplift rate of 1.1 mm yr<super>−1</super> is correspondingly faster than previously proposed. The cosmogenic radionuclide-derived fluvial erosion rates in the five largest coastal basins are typically around 0.20 to 0.25 mm yr<super>−1</super> and correspond well with the historical record. In the littoral cell, the ratio of fluvial sediment to sediment derived from wave-driven cliff backwearing is roughly equal along the northern coastline, and is about 75% fluvial sediment in Monterey Bay, downdrift from the mouth of the San Lorenzo River. I have therefore demonstrated that cosmogenic radionuclides can be successfully employed to probe issues of large-scale landscape evolution, and should prove of great value in addressing other linked geomorphic systems.
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Edith Sodergran's Modern Virgin: Overcoming Nietzsche and the Gendered Narrator
Mier-Cruz, Benjamin University of California, Berkeley 2013 해외박사(DDOD)
Edith Södergran's Modern Virgin: Overcoming Nietzsche and the Gendered Narrator by Benjamin Mier-Cruz Doctor of Philosophy in Scandinavian Languages & Literatures University of California, Berkeley Professor Linda Haverty Rugg, Chair This dissertation is an interdisciplinary study within a comparative Nordic-Germanic framework that proposes new approaches to reading representations of gender in European literary modernism and philosophy via the works of Finland-Swedish poet Edith Södergran and Friedrich Nietzsche. I posit that Södergran's avant-garde poetry presents feminine, masculine, and androgynous narrators that subvert the function of misogyny in Nietzsche's philosophy, which she had fervently read and incorporated into her writing. Surely, Södergran must have faced obstacles as she confronted Nietzsche's ostensible ad feminam; however, her progressive poetry, I contend, illustrates how Nietzsche's own discourse is constructed by androgynous rhetoric that exhibits paradoxically helpful appropriations of the female body. I therefore suggest that Södergran's reception of Nietzsche ushers in a transvaluation of the "modernist body" that overcomes the cultural body of Man and Woman as she opens up philosophical discourse with the feminine other in Nietzsche's otherwise phallocentric discourse. Using a shared framework of post-structural feminist theory, narratology, and poetry criticism, this dissertation attempts to overturn long-standing interpretations of Nietzsche's philosophy and to revise Södergran's mythologized biography and traditional analyses of her poetry. In chapter one, I attempt to separate Edith Södergran from her romanticized biography and refigure the female writing subject in history in a way that de-emphasizes her glorified, personal afflictions and instead elucidates Södergran's creative efforts to redefine gender. In chapter two, I posit that Södergran's lyrical narrator is not an exclusively female subject but a speaker that is multiple: Södergran's narrators are voiced by female, male, and androgynous bodies; which leads to a type of transgendered experience of narration. Chapter three focuses on Nietzsche's representations of women that I suggest influenced Södergran's writing. I attempt to show that Nietzsche's misogyny is actually a latent discussion of the cultural body that has been constructed and maintained by Western caricatures of femininity and masculinity. In chapter four, I examine the paradoxical representations of women in Also Sprach Zarathustra [Thus Spoke Zarathustra]. I look at what Zarathustra's hyper-masculine rhetoric can mean to a female reader who may be seeking ways to demystify essentialist constructions of sexual difference, and I explore the implications that Zarathustra's prophecy of the Übermensch—an advanced, idealistic human being—has for the human body. In the final chapter, I look at the narratological techniques that Södergran and Nietzsche employ in their poetry. Through a combined narratological and feminist approach, I suggest that Södergran and Nietzsche meticulously construct disruptive archetypes of the cultural body via multi-gendered narrative voices. I argue that Nietzsche and Södergran transcend normative narrative devices and introduce unprecedented post-gendered bodies and voices into the European modernist tradition. Their particular depictions of the post-gendered body thus resonate with contemporary theories and philosophical discussions of sex and gender.
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