971 resultados para Military History


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Repeated cycles of retreat and recolonization during the Quaternary ice ages are thought to have greatly influenced current species distributions and their genetic diversity. It remains unclear how this climatic oscillation has affected the distribution of genetic diversity between populations of wind-pollinated conifers in the Qinghai-Tibetan region. In this study, we investigated the within-species genetic diversity and phylogenetic relationships of Picea likiangensis, a dominant forest species in this region using polymorphic DNA (RAPD) markers. Our results suggest that this species has high overall genetic diversity, with 85.42% of loci being polymorphic and an average expected heterozygosity (H (E)) of 0.239. However, there were relatively low levels of polymorphism at population levels and the differences between populations were not significant, with percentages of polymorphic bands (PPB) ranging from 46.88 to 69.76%, Nei's gene diversity (H (E)) from 0.179 to 0.289 and Shannon's indices (Hpop) from 0.267 to 0.421. In accordance with our proposed hypothesis, a high level of genetic differentiation among populations was detected based on Nei's genetic diversity (G (ST) = 0.256) and AMOVA analysis (Phi (st) = 0.236). Gene flow between populations was found to be limited (Nm = 1.4532) and far lower than reported for other conifer species with wide distribution ranges from other regions. No clusters corresponding to three morphological varieties found in the south, north and west, respectively, were detected in either UPGMA or PCO analyses. Our results suggest that this species may have had different refugia during the glacial stages in the southern region and that the northern variety may have multiple origins from these different refugia.

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Integrating connectivity patterns into marine ecosystem management is a fundamental step, specially for stock subjected to the combined impacts of human activities (overfishing, habitat degradation, etc.) and climate changes. Thus, management of marine resources must incorporates the spatial scales over which the populations are connected. Notwithstanding, studying these dynamics remains a crucial and hard task and the predictions of the temporal and spatial patterns of these mechanisms are still particularly challenging. This thesis aims to puzzle over the red mullet Mullus barbatus population connectivity in the Western Mediterranean Sea, by implementing a multidisciplinary approach. Otolith sclerochronology, larval dispersal modelling and genetic techniques were gathered in this study. More particularly, this research project focused on early life history stages of red mullet and their role in the characterization of connectivity dynamics. The results show that M. barbatus larval dispersal distances can reach a range of 200 km. The differences in early life traits (i.e. PLD, spawning and settlement dates) observed between various areas of the Western Mediterranean Sea suggest a certain level of larval patchiness, likely due to the occurrence of different spawning pulses during the reproductive period. The dispersal of individuals across distant areas, even not significant in demographic terms, is accountable for the maintenance of the genetic flow among different demes. Fluctuations in the level of exchange among different areas, due to the variability of the source-sink dynamics, could have major implications in the population connectivity patterns. These findings highlight the reliability of combining several approaches and represent a benchmark for the definition of a proper resource management, with considerable engagements in effectively assuring the beneficial effects of the existent and future conservation strategies.

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Grattan, J.P. (2006) Aspects of Armageddon: An exploration of the role of volcanic eruptions in human history and civilization, Quaternary International 151, 10-18.

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Chapter 1 RAE2008

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Kibble, N, ?The Relevance and Admissibility of Prior Sexual History with the Defendant in Sexual Offence Cases? (2001) 32 Cambrian Law Review 27-63 (cited with approval by HL in R v A(2) [2002] AC 45) RAE2008

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Judicial Perspectives on the Operation of s.41 and the Relevance and Admissibility of Prior Sexual History Evidence: Four scenarios. N.Kibble. Crim.L.R. 2005 190. RAE2008

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Bain, William, 'Are There Any Lessons of History?: The English School and the Activity of Being an Historian', International Politics (2007) 44(5) pp.513-530 RAE2008

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Shepherd, Alistair, and T. C. Salmon, Toward a European Army: A Military Power in the Making? (Boulder, CO: Lynne Rienner, 2003), pp.x+237 RAE2008

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Marnet, Oliver, 'History repeats itself: The failure of rational choice models in corporate governance', Critical Perspectives on Accounting (2005) 18(2) pp.191-210 RAE2008

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Woods, T. (2007). African Pasts: Memory and History in African Literatures. Manchetser: Manchester University Press. RAE2008

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Forsyth, A. (2002). Gadamer, History and the Classics: Fugard, Marowitz, Berkoff and Harrison Rewrite the Theatre. Studies in Literary Criticism and Theory: Vol. 15. New York: Peter Lang. RAE2008

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O'Malley, T. (2002). Media History and Media Studies: aspects of the development of the study of media history in the UK 1945-2000. Media History. 8 (2), 155-173. RAE2008

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Rubinstein, William, Genocide: A History (Harlow: Pearson Longman, 2004), pp.vii+322 RAE2008

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Davies, Jeffrey. 'Soldiers, Peasants, Industry and Towns. The Roman Army in Britain: A Welsh Perspective', In: The Roman Army and the Economy (Amsterdam: J.C. Gieben, 2002), pp.169-203 RAE2008