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Historical Period (historical + period)
Selected AbstractsThe biogeography of avian extinctions on oceanic islands revisitedJOURNAL OF BIOGEOGRAPHY, Issue 8 2009Tim M. Blackburn Abstract A recent paper by Karels et al., ,The biogeography of avian extinctions on oceanic islands' (Journal of Biogeography, 2008, 35, 1106,1111), uses structural equation modelling to assess the causes of the number of island bird species driven extinct in the historical period. Here, we critically assess the conclusions of the paper and argue that it does not provide the new insights into the causes of extinction in island birds that its authors claim. [source] A fine-resolution Pliocene pollen and charcoal record from Yallalie, south-western AustraliaJOURNAL OF BIOGEOGRAPHY, Issue 2 2004Pia Atahan Abstract Aim, This paper aims to reconstruct a high-resolution fire and vegetation history from a period when humans were absent in Australia. This is then used to comment on the frequency of natural fire in high biodiversity heathland, and to compare this with historical fire regime in the same region. Methods, A section of varved sediment covering a period of c. 84 years was taken from Palaeolake Yallalie in south-western Australia. The sediments were separated into approximately single to small multiples of years and then analysed for charcoal, pollen and sediment analysis to reconstruct the environmental conditions at the time. Results, The charcoal record indicates fire recurrence to have been roughly between 5 and 13 years, a little longer than those of the historical period. The pollen record was dominated by Casuarinaceae, Myrtaceae and a large number of Proteaceae species; these are intermixed with Araucariaceae, Nothofagus and Podocarpus. This suggests there was a mix of sclerophyll woodland and a mosaic of rain forest elements, thus conditions must have been wetter, particularly in the summers, compared with today. Conclusions, We assume that fire was most likely confined to the sclerophyll vegetation, and that fire has been a significant feature of the environment long before humans entered Australia. The slightly longer fire recurrence times compared with the present result from the intermittent nature of lightning and wetter summers at the time. [source] Vegetation and disturbance history of a rare dwarf pitch pine community in western New England, USAJOURNAL OF BIOGEOGRAPHY, Issue 10-11 2002Glenn Motzkin Abstract Aim, This study documents the vegetation history and age-structure of a rare, ridgetop dwarf pine,oak community and compares the dynamics of this unusual vegetation with similar dwarf pine communities found elsewhere in the north-eastern United States (US). Location, The study area is located on the summit of Mt Everett in the Taconic Mountains of south-western Berkshire County, Massachusetts, USA (42°06,N 73°26,W). Methods, Vegetation composition, tree age-structure, physical site characteristics, and evidence of fire and other disturbances were determined for twelve 15 × 15 m plots in dwarf pine,oak vegetation and two plots in oak forests on the summit. Age-structure analyses, tree-ring patterns, and historical records of human and natural disturbance were used to investigate the long-term history and dynamics of the summit vegetation. Results, The summit of Mt Everett has been dominated by dwarf pines (1,3 m tall) and ericaceous shrubs similar to the modern vegetation throughout the historical period; there is no evidence that tall-stature forests occurred on the site at any point in the past few centuries. The summit supports uneven-aged stands; pitch pine (Pinus rigida) recruitment began in the 1830s and occurred in every decade since the 1860s. Average pitch pine age is seventy-eight with a range of 12,170 years. Red oak (Quercus rubra) and red maple (Acer rubrum) increased in importance in the twentieth century, with most stems establishing from 1940 to 1980. Pitch pine radial growth rates averaged <0.5 mm year,1 while red oak and red maple averaged 1.0 and 0.8 mm year,1, respectively. In some areas, hardwoods have overtopped pitch pines, apparently resulting in pitch pine mortality. Whereas most dwarf pitch pine communities occur on sites that burn frequently and have a high degree of cone serotiny, we found no evidence of recent fires or cone serotiny. Small amounts of macroscopic charcoal that we documented may have resulted from fires in the pre-European or early historical periods. Conclusions, Harsh edaphic conditions and chronic low-level disturbances on the summit, including frequent winter storms, have apparently contributed to the establishment, long-term persistence, and slow radial growth of dwarf pitch pines on Mt Everett. The ability of dwarf pines to persist on a site in the absence of frequent fire is highly unusual among North-eastern barrens and has not been well-incorporated into previous conceptual ecological models of these communities. Our results suggest that even among North-eastern barrens, the summit of Mt Everett is characterized by highly unusual vegetation and dynamics. The site has long been recognized as regionally significant and should be afforded the strictest conservation protection. With no evident history of human disturbance or recent fire, there is no apparent need for immediate active management of the site. [source] The ostrich in Egypt: past and presentJOURNAL OF BIOGEOGRAPHY, Issue 8 2001Nicolas Manlius Aim This article tracks the evolution of the distribution of ostrich populations, Struthio camelus L., 1758, in Egypt from the Late Pleistocene up to present times with a view to establishing a series of distribution maps for the historical period. An attempt is then made to describe and interpret these maps. Location The country considered is Egypt. Methods We compiled all the information about the presence of the ostrich in Egypt collected from the study of fossil remains, archaeological materials and from the narrative of travellers since the fourteenth century. From the accounts of these travellers, three maps showing the location of this birds in this country are established: from the end of the fourteenth century to the end of the seventeenth century; from the beginning of the eighteenth to the end of the nineteenth century; and lastly, for the twentieth century. Results The ostrich was abundant and broadly distributed in Egypt in the past. However, it has been constantly in decline. It disappeared from the north of the country and lived only in the southeast up to the end of the nineteenth century. The birds reappeared in the latter region at the beginning of the 1960s up to 1991 before disappearing from the country. Main conclusions The principal reasons for the decline of the ostrich in Egypt are the aridification caused by climatic changes and intensive hunting by humans. It is possible that this bird was not sighted in the country between the beginning of the twentieth century and the 1960s, not because it had disappeared, but most probably because it was sufficiently discrete to be noticed. But Retracer l'évolution de la distribution des populations d'autruches, Struthio camelus L., 1758, en Egypte depuis le Pléistocène final jusqu'à nos jours en vue d'établir une série de cartes de distribution pour l'époque historique. Décrire et interpréter ensuite ces cartes. Localisation Le pays considéré est l'Egypte. Méthodes Nous avons compilé toutes les informations portant sur la présence de l'autruche en Egypte, recueillies à partir de l'étude de fossiles des matériaux archéologiques, ou encore des écrits des voyageurs depuis le XIVe siècle. A partir des témoignages de ces voyageurs, trois cartes montrant la localisation de cet animal en Egypte seront établies: depuis la fin du XIVe siècle jusqu'à la fin du XVIIe siècle; depuis le début du XVIIIeà la fin du XIXe siècle; et enfin pour le XXe siècle. Résultats Dans le passé, les populations d'autruches étaient abondantes et largement répandues en Egypte. Cependant, elles n'ont pas cessé de régresser. Elles ont d'abord disparues du nord du pays pour ne plus survivre que dans le sud-est, et ce jusqu'à la fin du XIXe siècle. L'animal est reparut dans cette dernière région au début des années 1960 jusqu'en 1991, avant de disparaître du pays. Conclusions principales Les principales raisons pour lesquelles la population d'autruches a régressé en Egypte tiennent d'une aridification due à des changements climatiques ainsi qu'à une chasse outrancière par l'homme. Il est possible que cet oiseau n'aie pour ainsi dire plus été signalé dans le pays entre le début du XXe siècle et les années 1960, non parce qu'il en aurait disparu mais plutôt parce qu'il aurait su se faire suffisamment discret pour ne pas être repéré. [source] Spatial and temporal variability in seed dynamics of machair sand dune plant communities, the Outer Hebrides, ScotlandJOURNAL OF BIOGEOGRAPHY, Issue 5 2001N. W. Owen Aim The subjects of seed banks and seed rain represent comparatively neglected areas of biogeography, yet at the community scale, exhibit interesting patterns in both space and time. This paper describes the seed bank and seed rain characteristics of the machair sand dune communities of the Outer Hebrides. As well as looking at individual species distributions and variability, the seed banks and seed rain are examined in terms of their detailed subcommunity composition and its local spatial and temporal variation. The machair plant (sub)communities show extensive degrees of anthropogenic modification because of past and present agricultural management, including cultivation for cereals over wide areas and for potatoes in large numbers of ,lazy beds' or small patches. Thus over the historical period, large areas of machair have undergone regular ploughing and cultivation, which have provided the opportunity for a patchwork of secondary succession to occur. This pattern continues to the present day. Furthermore, most other non-cultivated plant (sub)communities are intensively grazed, primarily by cattle and also by sheep and rabbits. Location South Uist, the Outer Hebrides, north-west Scotland. Methods At two carefully selected locations, a range of these various successional subcommunities have been sampled for their seed banks, by taking cores and for their seed rain, by using specially designed traps located where each seed bank sample was removed. This paired sampling strategy allowed direct comparison of the seed bank and the seed rain. Both individual species distributions and the community assemblages of seed bank/seed rain species are examined in space and time using techniques of numerical classification [two-way indicator species analysis (TWINSPAN)] and ordination [detrended correspondence analysis (DCA)]. Results and conclusions There is considerable heterogeneity within and between machair subcommunities in terms of seed bank and seed rain characteristics. The soil seed banks and seed rain of the agriculturally disturbed machair subcommunities are consistently more dense and more species rich than non-cultivated areas of the machair. Overall, machair seed banks are small and stable with no discernible seasonal trends in either size or species composition. In contrast, seed rain on the machair is characterized by a distinct temporal trend. Both seed banks and seed rain are potentially very poor sources of propagules for recolonization following disturbance, indicating that the majority of revegetation following anthropogenic and/or environmental interference is through vegetative reproduction. [source] The influence of the interviewing style and the historical context on positioning shifts in the narrative of a Second World War Resistance member1JOURNAL OF SOCIOLINGUISTICS, Issue 2 2009Dorien Van De Mieroop This article involves a study of the narrative of a Second World War Resistance member by means of an interview in which the interviewer explicitly inserts the historical context by selecting the topics for discussion and asking critical questions. The interview deals with three periods: the Wartime period; the First Wave of Reprisals; and the Second Wave of Reprisals. The analyses show that the interviewee's first and second-level positionings shift along with changes in historical period and that they mirror the general historical image of the Resistance. These different positionings are highly consistent in themselves and this consistency is also present on the third level of positioning, because of the interviewee's fairly muted style of narrating, by which blatant inconsistencies are avoided and a general, ,good' identity is constructed. The article also demonstrates that the interview style adds another, important dimension to the analysis of identities in life stories. [source] On Defending Controversial Viewpoints: Debates of Sixth Graders About the Desirability of Early 20th-Century American ImmigrationLEARNING DISABILITIES RESEARCH & PRACTICE, Issue 3 2002Charles A. MacArthur Sixth-grade students with and without mild disabilities participated in an eight-week project-based investigation about immigration to the United States in the late 19th and early 20th centuries. Students' investigations were designed to promote their understanding of the perspectives of immigrants and Americans who opposed immigration, as well as the "ways of life" that gave impetus to immigration and often resulted in conflict between these groups. At the conclusion of these investigations, students were assigned the role of the immigrants or opponents of immigration and were asked to debate the desirability of immigration to the United States during this historical period. The primary focus of this article is on the opportunities afforded by, and the limitations of, these classroom debates. The debates promoted high levels of engagement and equal participation by students with and without disabilities as well as by boys and girls. Analyses of content and structure showed that students' discourse was influenced by the knowledge they gained during their investigations, but the use of this knowledge was shaped by the competitive rhetorical goal of defending a particular viewpoint. Later rounds of the debates were more balanced and drew more on the breadth of available knowledge than did earlier rounds. Overall, the debates were more typical of everyday arguments than academic arguments. The implications of our findings for the design of instructional opportunities in the social studies in inclusive classrooms are discussed. [source] Genetic relationship amongst the major non-coding regions of mitochondrial DNAs in wild boars and several breeds of domesticated pigsANIMAL GENETICS, Issue 3 2001N. Okumura We completed phylogenetic analysis of the major non-coding region of the mitochondrial DNA (mtDNA) from 159 animals of eight Euro-American and six East Asian domesticated pig breeds and 164 Japanese and five European wild boars. A total of 62 mtDNA haplotypes were detected. Alignment of these regions revealed nucleotide variations (including gaps) at 73 positions, including 58 sites with transition nucleotide substitutions, and two transversion substitutions. Phylogenetic analysis of the sequences could not organize domestic pig breeds into discrete clusters. In addition, many of the haplotypes found in members of diverged clustering groups were found primarily in Euro-American pig breeds, indicating extensive introgression of Asian domestic pigs into European breeds. Furthermore, phylogenetic analysis allocated the DNA sequences of non-coding regions into two different groups, and the deepest branchpoint of this porcine phylogeny corresponded to 86 000,136 000 years before present. This time of divergence would predate the historical period when the pig is thought to have been domesticated from the wild boar. [source] Unionisation in the Dublin hotel industryINTERNATIONAL JOURNAL OF TOURISM RESEARCH, Issue 3 2003Annemarie Piso Abstract The Dublin hotel industry experiences significantly higher levels of union density than is the case amongst hotel workers in the UK. This paper examines the context in which these different experiences of union density take place. It provides an examination of the historical roots of union organisation within Dublin hotels and explores the factors that have contributed to effective organisation within the industry today. It concludes by arguing that although the structural characteristics of employment in the UK can act as a barrier to union organisation, these can, in certain historical periods, be overcome where there is a shifting balance of power between workers and employers affecting both the hotel industry and society as a whole. Copyright © 2003 John Wiley & Sons, Ltd. [source] Vegetation and disturbance history of a rare dwarf pitch pine community in western New England, USAJOURNAL OF BIOGEOGRAPHY, Issue 10-11 2002Glenn Motzkin Abstract Aim, This study documents the vegetation history and age-structure of a rare, ridgetop dwarf pine,oak community and compares the dynamics of this unusual vegetation with similar dwarf pine communities found elsewhere in the north-eastern United States (US). Location, The study area is located on the summit of Mt Everett in the Taconic Mountains of south-western Berkshire County, Massachusetts, USA (42°06,N 73°26,W). Methods, Vegetation composition, tree age-structure, physical site characteristics, and evidence of fire and other disturbances were determined for twelve 15 × 15 m plots in dwarf pine,oak vegetation and two plots in oak forests on the summit. Age-structure analyses, tree-ring patterns, and historical records of human and natural disturbance were used to investigate the long-term history and dynamics of the summit vegetation. Results, The summit of Mt Everett has been dominated by dwarf pines (1,3 m tall) and ericaceous shrubs similar to the modern vegetation throughout the historical period; there is no evidence that tall-stature forests occurred on the site at any point in the past few centuries. The summit supports uneven-aged stands; pitch pine (Pinus rigida) recruitment began in the 1830s and occurred in every decade since the 1860s. Average pitch pine age is seventy-eight with a range of 12,170 years. Red oak (Quercus rubra) and red maple (Acer rubrum) increased in importance in the twentieth century, with most stems establishing from 1940 to 1980. Pitch pine radial growth rates averaged <0.5 mm year,1 while red oak and red maple averaged 1.0 and 0.8 mm year,1, respectively. In some areas, hardwoods have overtopped pitch pines, apparently resulting in pitch pine mortality. Whereas most dwarf pitch pine communities occur on sites that burn frequently and have a high degree of cone serotiny, we found no evidence of recent fires or cone serotiny. Small amounts of macroscopic charcoal that we documented may have resulted from fires in the pre-European or early historical periods. Conclusions, Harsh edaphic conditions and chronic low-level disturbances on the summit, including frequent winter storms, have apparently contributed to the establishment, long-term persistence, and slow radial growth of dwarf pitch pines on Mt Everett. The ability of dwarf pines to persist on a site in the absence of frequent fire is highly unusual among North-eastern barrens and has not been well-incorporated into previous conceptual ecological models of these communities. Our results suggest that even among North-eastern barrens, the summit of Mt Everett is characterized by highly unusual vegetation and dynamics. The site has long been recognized as regionally significant and should be afforded the strictest conservation protection. With no evident history of human disturbance or recent fire, there is no apparent need for immediate active management of the site. [source] The ,reversal of fortune' thesis and the compression of history: Perspectives from African and comparative economic history,JOURNAL OF INTERNATIONAL DEVELOPMENT, Issue 8 2008Gareth Austin Abstract Acemoglu, Johnson and Robinson have dramatically challenged the tendency of economists to confine their empirical search for the causes of economic growth to the recent past. They argue that the kind of institutions established by European colonialists, either protecting private property or extracting rents, resulted in the poorer parts of the pre-colonial world becoming some of the richest economies of today; while transforming some of the more prosperous parts of the non-European world of 1500 into the poorest economies today. This view has been further elaborated for Africa by Nunn, with reference to slave trading. Drawing on African and comparative economic historiography, the present paper endorses the importance of examining growth theories against long-term history: revealing relationships that recur because the situations are similar, as well as because of path dependence as such. But it also argues that the causal relationships involved are more differentiated than is recognised in AJR's formulations. By compressing different historical periods and paths, the ,reversal' thesis over-simplifies the causation. Relatively low labour productivity was a premise of the external slave trades; though the latter greatly reinforced the relative poverty of many Sub-Saharan economies. Again, it is important to distinguish settler and non-settler economies within colonial Africa itself. In the latter case it was in the interests of colonial regimes to support, rather than simply extract from, African economic enterprise. Finally, economic rent and economic growth have often been joint products, including in pre-colonial and colonial Africa; the kinds of institutions that favoured economic growth in certain historical contexts were not necessarily optimal for that purpose in others. AJR have done much to bring development economics and economic history together. The next step is a more flexible conceptual framework, and a more complex explanation. Copyright © 2008 John Wiley & Sons, Ltd. [source] An improved method for determination of Holocene coastline changes around two ancient settlements in southern Anatolia: a geoarchaeological approach to historical land degradation studiesLAND DEGRADATION AND DEVELOPMENT, Issue 4 2003Y. Bal Abstract Two well-known ancient sites in southern Anatolia were selected to investigate and quantify the impact of historical land degradation on the Mediterranean coast of Turkey. These sites are the Luwian settlements of Kelenderis (modern Ayd,nc,k) and nearby Nagidos (Bozyaz,), both in Mersin Province and both occupied since around 4000,BP. Changes in local climatic conditions over this period have produced variations in the rates of fluvial transport of sediment/soil from the hinterland into the relevant deltaic regions, thus influencing rates of coastal progradation and aggradation. In addition, both eustatic and neotectonic movements have contributed to deltaic subsidence and/or hinterland uplift, with consequential impact on coastal evolution (positive or negative). The novel geoarchaeological methodology adopted in this study involves the creation of a graphical archive from detailed and standardised measurements taken from rectified mono- and stereoscopic aerial photographs. These archival data were then integrated with data from several types of historical map and field measurements in order to develop a geographical information system (GIS) database that could be interrogated, enabling graphical models of past coastal change to be constructed and calculations then made of the coastal configurations at successive historical periods. These calculations reveal that over the past 6000 years there has been only limited erosion/degradation in the karstic hinterland supplying the sediment to these two study sites (contrary to some previous statements concerning the high degradation risk of Mediterranean karst terrains). Furthermore, rates of progradation in each delta appear to have become diminished or even reversed in the past several decades as a result of both natural and anthropogenic factors. The precise contribution of neotectonic movements in this seismically active zone remains unquantified and is a topic requiring further interdisciplinary study. Copyright © 2003 John Wiley & Sons, Ltd. [source] DISTINGUISHED SCHOLAR ARTICLE Rethinking women's sexual orientation: An interdisciplinary, relationship-focused approachPERSONAL RELATIONSHIPS, Issue 1 2001LETITIA ANNE PEPLAU What leads some women to form romantic and sexual relationships with men, and other women to form intimate relationships with women? This article presents a new conceptual paradigm for understanding women's sexual orientation that is emerging from research in such diverse fields as social psychology, sex research, evolutionary psychology, attachment theory, and neuroscience. This approach acknowledges the potential plasticity of women's sexuality and the emphasis that women place on close relationships as a context for sexuality. Research also raises the possibility that for women the biological determinants of sexual desire, attraction, and attachment are not inherently linked to a partner's gender. This article begins with a brief survey of research on women's same-sex romantic and sexual relationships not only in the United States today but also in other cultures and historical periods. These and other findings are used to critique prevailing conceptual models of women's sexual orientation. Finally, key elements in an alternative paradigm are described. [source] An American Perspective on the EU's Constitutional TreatyPOLITICS, Issue 1 2007Alberta Sbragia This article argues that the American experience can help illuminate some of the tensions surrounding the European Union's embattled Constitutional Treaty. I want to emphasise, however, that I am not trying to make any rigorous comparative statement here. I am not arguing that the United States and the EU are similar. They have developed in very different historical periods: the 13 colonies were certainly not equivalent to the old and well-established nation states which form the EU. Nonetheless, I am saying that some aspects of the American experience may be useful in thinking about the current state of tension which surrounds the process of European integration. In this article, therefore, I shall very schematically contrast the American and the European experience of integration and use that contrast to help illuminate the tensions which are now at work in the EU. [source] Iacopo della Quercia scultore Sanese: late Medieval or early Renaissance artist?RENAISSANCE STUDIES, Issue 2 2007Helen Geddes The work of the Siena-born sculptor Jacopo della Quercia (b. c. 1370,75 , d. 1438) has often proved difficult to reconcile with early fifteenth-century artistic trends, and he has often been marginalised in mainstream assessments of early Italian sculpture. Quercia has commonly been perceived as anomalous, neither belonging wholly to the Trecento, nor conforming unequivocally to the characterization of a ,Renaissance' artist, despite being a contemporary of Donatello, Lorenzo Ghiberti, and Masaccio. This is a view compounded by his never having found patronage in Florence. The paper examines the changing critical reception of Quercia's sculptures, from the later fifteenth century, to Giorgio Vasari in the sixteenth, through to the modern literature, thus charting the changing perception of his art. An analysis of the extent to which his sculptural works conform to the preoccupations of Renaissance art, in his treatment of the human body, of perspective, the study of the antique, and in the study of nature, is presented. The paper argues that it is the somewhat artificial and limiting definitions imposed by art historical periods, and an emphasis on artists working in Florence, that have obscured and hindered direct appreciation and understanding of Quercia's great achievements. [source] The frequency of metopism in Anatolian populations dated from the Neolithic to the first quarter of the 20th centuryCLINICAL ANATOMY, Issue 6 2008S. Ero Abstract Metopism, which is defined as a condition in which the two pieces of the frontal bone fail to merge in early childhood, displays varying degrees of incidence. In this study, the variation of the frequency of metopism across historical periods is investigated on the skulls of 487 adults from 12 different Ancient Anatolian populations dated to various periods of history ranging from the Neolithic to the first quarter of the 20th century. In addition, the study also examines the relationship of metopism to sex and cranial form. It is revealed that the frequency of metopism showed a relative increase across time periods in Anatolia after the Neolithic Period, with the exception of the Cevizcio,lu Çiftli,i population. However, no significant relationship was found between metopism and cranial form or sex. It is found that the frequency of metopism in Ancient Anatolia had a distribution range of 3.3,14.9%. This distribution shows that the inhabitants of Anatolia have a heterogeneous genetic make-up due to the geographical situation of Anatolia, which has been open to gene flow both in the past and at present. Clin. Anat. 21:471,478, 2008. © 2008 Wiley-Liss, Inc. [source] | |||||||||||||