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Over the past decades, Colombian society has endured the impact of a longstanding political conflict among different actors and outrageous expressions of violence, especially among left wing guerrillas, right wing paramilitary groups and the state government. Drawing on socio-legal studies in transitional justice and human rights, this research attempts to

Over the past decades, Colombian society has endured the impact of a longstanding political conflict among different actors and outrageous expressions of violence, especially among left wing guerrillas, right wing paramilitary groups and the state government. Drawing on socio-legal studies in transitional justice and human rights, this research attempts to analyze the recent experience of transitional justice in Colombia. The main purpose of this research is to understand how political, institutional and social actors, especially the government, the courts, the human rights and transitional justice NGOs, and victims associations, frame the mechanisms of transitional justice and use legal instruments to transform the conflict and reach what they consider "justice." It also attempts to understand the relations between politics and law in the context of a hegemonic discourse of security and give account of the expressions of resistance of human rights networks. In doing so, this research advances theory on literature about law and society and transitional justice by means of applying and expanding the theoretical framework of socio-legal research via the process of transitional justice in Colombia. The dissertation presents information gathered in the field in Colombia between July 2009 and July 2010 through a qualitative research design based on document analysis and in-depth interviews with members of different international and domestic human rights organizations, victims' organizations and national institutions. The research explains how these organizations combined political and legal actions in order to contest a project of security, and more specifically a project of impunity that came from negotiations with the paramilitary groups. The research also explains how the human rights networks not only mobilized internationally to gain political support from the international community, but also how these organizations contributed to transform the political debate about victims' rights. The research also explains how the human rights organizations and victims' groups articulated the global discourse on human rights and the local and domestic meanings constructed by the emerging movements of victims. Finally, the research analyses the relevance of legal practices consisting on strategic use of law in order to protect the victims of human rights violations.
ContributorsGomez Sanchez, Gabriel (Author) / Lauderdale, Pat (Thesis advisor) / Vanna, Gonzales (Committee member) / Ladawn, Haglund (Committee member) / Jeffrey, Juris (Committee member) / Arizona State University (Publisher)
Created2011
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N2 fixation and ammonia oxidation (AO) are the two most important processes in the nitrogen (N) cycle of biological soil crusts (BSCs). We studied the short-term response of acetylene reduction assay (ARA) rates, an indicator of potential N2 fixation, and AO rates to temperature (T, -5°C to 35°C) in BSC

N2 fixation and ammonia oxidation (AO) are the two most important processes in the nitrogen (N) cycle of biological soil crusts (BSCs). We studied the short-term response of acetylene reduction assay (ARA) rates, an indicator of potential N2 fixation, and AO rates to temperature (T, -5°C to 35°C) in BSC of different successional stages along the BSC ecological succession and geographic origin (hot Chihuahuan and cooler Great Basin deserts). ARA in all BSCs increased with T until saturation occurred between 15 and 20°C, and declined at 30–35°C. Culture studies using cyanobacteria isolated from these crusts indicated that the saturating effect was traceable to their inability to grow well diazotrophically within the high temperature range. Below saturation, temperature response was exponential, with Q10 significantly different in the two areas (~ 5 for Great Basin BSCs; 2–3 for Chihuahuan BSCs), but similar between the two successional stages. However, in contrast to ARA, AO showed a steady increase to 30–35°C in Great Basin, and Chihuhuan BSCs showed no inhibition at any tested temperature. The T response of AO also differed significantly between Great Basin (Q10 of 4.5–4.8) and Chihuahuan (Q10 of 2.4–2.6) BSCs, but not between successional stages. Response of ARA rates to T did not differ from that of AO in either desert. Thus, while both processes scaled to T in unison until 20°C, they separated to an increasing degree at higher temperature. As future warming is likely to occur in the regions where BSCs are often the dominant living cover, this predicted decoupling is expected to result in higher proportion of nitrates in soil relative to ammonium. As nitrate is more easily lost as leachate or to be reduced to gaseous forms, this could mean a depletion of soil N over large landscapes globally.

ContributorsZhou, Xiaobing (Author) / Smith, Hilda (Author) / Girardo Silva, Ana Maria (Author) / Belnap, Jayne (Author) / Garcia-Pichel, Ferran (Author) / College of Liberal Arts and Sciences (Contributor)
Created2016-10-24