2 resultados para Formiga argentina -- Hàbits i conducta
em Digital Commons at Florida International University
Resumo:
This dissertation explores the political exclusion and reintegration of families and individuals in Córdoba, Argentina during the early nineteenth-century. Part one is an examination of how Federals in Córdoba managed the process of political identification and purge. Federals set up ad hoc institutions that were responsible for targeting political subversives within provincial communities. From 1831 to 1852, Federals managed to target, or “classify,” over 400 individuals and families in various towns and villages as “savage Unitarians,” a political label that meant the certain loss of rights, property, exile, and worse. Federals also sought active participation among “citizens” from all levels of society. Thus, I argue that the process of correctly identifying a “savage Unitarian” in Córdoba was constantly subject to modification at the local level. I also reconstruct the stories of accused families as they struggled to survive the political purges. Many of the families were large landowners and wealthy merchants, confirming that early republican Argentine political struggles were often intra-elite affairs. However, the “classified” individuals and families also represented a variety of socio-economic, ethnic, and racial groups. ^ The second part of this study focuses on families who petitioned Federal authorities for the restitution of rights and property. They proclaimed their loyalty to the “Federal cause,” and often, they had friends and family who could vouch for their claims. These petitions forced Federal authorities to doubt the precision of political identification and re-think how the ideology of Federalism was defined. Authorities granted most requests for repatriation, thereby creating a process of reintegration that included amnesty and restitution. Yet, this system failed to repair the psychological, emotional, materials, and political effects of political purge. Conflicts between society and state led to numerous misunderstandings about what restitution, justice, and reconciliation meant. The new regime's leaders more often denied restitution claims to formerly accused families and individuals, demonstrating that the journey from “savage” to citizen left an indelible imprint on family life in mid-nineteenth century Argentina. ^
Resumo:
Equisetum giganteum L., a giant horsetail, is one of the largest living members of an ancient group of non-flowering plants with a history extending back 377 million years. Its hollow upright stems grow to over 5 m in height. Equisetum giganteum occupies a wide range of habitats in southern South America. Colonies of this horsetail occupy large areas of the Atacama river valleys, including those with sufficiently high groundwater salinity to significantly reduce floristic diversity. The purpose of this research was to study the ecophysiological and biomechanical properties that allow E. giganteum to successfully colonize a range of habitats, varying in salinity and exposure. Stem ecophysiological behavior was measured via steady state porometry (stomatal conductance), thermocouple psychrometry (water potential), chlorophyll fluorescence, and ion specific electrodes (xylem fluid solutes). Stem biomechanical properties were measured via a 3-point bending apparatus and cross sectional imaging. Equisetum giganteum stems exhibit mechanical characteristics of semi-self-supporting plants, requiring mutual support or support of other vegetation when they grow tall. The mean elastic moduli (4.3 Chile, 4.0 Argentina) of E. giganteum in South America is by far the largest measured in any living horsetail. Stomatal behavior of E. giganteum is consistent with that of typical C3 vascular plants, although absolute values of maximum late morning stomatal conductance are very low in comparison to typical plants from mesic habitats. The internode stomata exhibit strong light response. However, the environmental sensitivity of stomatal conductance appeared less in young developing stems, possibly due to higher cuticular conductance. Exclusion of sodium (Na) and preferential accumulation of potassium (K) at the root level appears to be the key mechanism of salinity tolerance in E. giganteum. Overall stomatal conductance and chlorophyll fluorescence were little affected by salinity, ranging from very low levels up to half strength seawater. This suggests a high degree of salinity stress tolerance. The capacity of E. giganteum to adapt to a wide variety of environments in southern South America has allowed it to thrive despite tremendous environmental changes during their long tenure on Earth.