Régression holocène du couvert coniférien à la limite des forêts (Québec nordique)

1985 ◽  
Vol 63 (7) ◽  
pp. 1213-1225 ◽  
Author(s):  
Réjean Gagnon ◽  
Serge Payette
Keyword(s):  
Picea Mariana ◽  
Black Spruce ◽  
Climatic Conditions ◽  
Larix Laricina ◽  
Charcoal Analysis ◽  
Mosaic Landscape ◽  
The Past ◽  
Modern Period ◽  
History Of ◽  
Forest Limit

The occurrence of tamarack (Larix laricina (Du Roi) K. Koch) and black spruce (Picea mariana (Mill.) B.S.P.) macrofossils or subfossils on the tundroid patches at the forest limit indicates that those patches were colonized by trees in the past. The aim of this study is to reconstruct the fluctuations of the coniferous formations by macrofossil analysis. More than 465 macrofossils and 30 charcoals were collected, 31 and 23 of which, respectively, were 14C dated. The results of charcoal analysis indicated that fires were more frequent in the southern part of the forest limits than in the northern part. During the last millenium three periods of fire (modern, 400, and 900 years) were noted in the southern part, two periods (modern and 600 years) at the forest limit, and none north of the forest limit. The majority of collected macrofossils are from the modern period; their death is related to the action of fire. The mosaic landscape of the forest tundra is related to a deterioration of the climatic conditions coupled with the history of fires.

scholarly journals Comparative Height Growth of Eastern Larch and Black Spruce in Northwestern Ontario

1978 ◽  
Vol 54 (6) ◽  
pp. 296-297 ◽  
Author(s):  
Douglas A. Mead
Keyword(s):  
Picea Mariana ◽  
Black Spruce ◽  
Height Growth ◽  
Larix Laricina ◽  
Stem Analysis ◽  
Northwestern Ontario ◽  
Analysis Methods ◽  
Spruce Stands

Height growth of eastern larch (Larix laricina (Du Roi) K. Koch) and black spruce (Picea mariana (Mill.) B.S.P.) was determined using standard stem analysis methods on trees from two sites in northwestern Ontario. The data were obtained from mixed larch-spruce stands which were relatively undisturbed. The larch exhibited substantially better height growth than the spruce through age 65.

scholarly journals Historical perspective of neurology in Iran

2019 ◽  
Author(s):  
Shri Kant-Mishra ◽  
Hadi Mohammad Khanli ◽  
Golnoush Akhlaghipour ◽  
Ghazaleh Ahmadi Jazi ◽  
Shaweta Khosa1
Keyword(s):  
Historical Perspective ◽  
Medical Center ◽  
Medical Science ◽  
Early Period ◽  
Medieval Period ◽  
Neurologic Diseases ◽  
The Past ◽  
Modern Period ◽  
History Of ◽  
Modern Era

Iran is an ancient country, known as the cradle of civilization. The history of medicine in Iran goes back to the existence of a human in this country, divided into three periods: pre-Islamic, medieval, and modern period. There are records of different neurologic terms from the early period, while Zoroastrian (religious) prescription was mainly used until the foundation of the first medical center (Gondishapur). In the medieval period, with the conquest of Islam, prominent scientists were taught in Baghdad, like Avicenna, who referred to different neurologic diseases including stroke, paralysis, tremor, and meningitis. Several outstanding scientists developed the medical science of neurology in Iran, the work of whom has been used by other countries in the past and present. In the modern era, the Iranian Neurological Association was established with the efforts of Professor Jalal Barimani in 1991.

Soil history and debris avalanche deposits along the Illawarra scarpland

Soil Research ◽  
1963 ◽  
Vol 1 (2) ◽  
pp. 223 ◽  
Author(s):  
PH Walker
Keyword(s):  
Debris Avalanche ◽  
Climatic Conditions ◽  
Phase Instability ◽  
Alternate Form ◽  
The Past ◽  
Weathered Zone ◽  
Debris Avalanches ◽  
History Of

Two major periods of avalanching have occurred along the Illawarra scarpland. The older, the Scarborough formation, is characterized by a very thick, acid, weathered zone, similar to the lower mottled horizons of laterite profiles. The younger, Keira formation, has relatively shallow red and yellow earth profiles developed in it. Although its profile of deep weathering has some features in common with laterite, the Scarborough formation is not part of the general laterite surface, but represents a separate period of prolonged stability and weathering. The debris-avalanches are thought to have been deposited during excessively wet climatic conditions in the past, and they represent an alternate form of instability compared with the dry phase instability proposed for the K-cycle history of milder hillslope terrain near Nowra.

scholarly journals De BMGN als platform voor vernieuwing van de politieke geschiedenis

2021 ◽  
Vol 136 (2) ◽  
pp. 136-149
Author(s):  
Dirk Jan Wolffram
Keyword(s):  
The Netherlands ◽  
Political History ◽  
The Political ◽  
Young Generation ◽  
History Writing ◽  
Dutch Politics ◽  
Cultural Approach ◽  
The Past ◽  
Modern Period ◽  
History Of

De politieke geschiedenis van Nederland en België zoals bestudeerd in de BMGN had verschillende gezichten. Aanvankelijk domineerde een zekere traditionele geschiedschrijving over beide landen, die als een steeds dunner wordende rode draad door de inhoud van de afgelopen vijftig jaar loopt. Vanaf het midden van de jaren tachtig verschoof de nadruk naar de geschiedschrijving over de Nederlandse politiek, en ontwikkelde de BMGN zich tot platform voor de vernieuwing van de politieke geschiedenis van de moderne tijd. Deze politieke-cultuurbenadering manifesteerde zich vanaf het midden van de jaren negentig in een aantal baanbrekende artikelen en bracht ook de moderne Belgische politieke geschiedenis opnieuw onder de aandacht. In het afgelopen decennium ontpopte de BMGN zich tot podium voor een jonge generatie politieke historici. Studies of the political history of the Netherlands and Belgium as examined in the BMGN had various manifestations. Initially a somewhat traditional historiography about the two countries dominated, surfacing in the content of the past fifty years, albeit progressively less pronounced. From the mid 1980s the focus shifted to the historiography of Dutch politics, and the BMGN evolved into a platform for innovating political history writing of the modern period. This political-cultural approach manifested from the mid 1990s in several pioneering articles and restored interest in modern Belgian political history. In the past decade the BMGN has become a platform for a young generation of political historians.

scholarly journals Responses of black spruce (Picea mariana) and tamarack (Larix laricina) to flooding and ethylene

2003 ◽  
Vol 23 (8) ◽  
pp. 545-552 ◽  
Author(s):  
M. A. Islam ◽  
S. E. MacDonald ◽  
J. J. Zwiazek
Keyword(s):  
Picea Mariana ◽  
Black Spruce ◽  
Larix Laricina

Tree-ring evidence of larch sawfly outbreaks in western Labrador, Canada

2010 ◽  
Vol 40 (8) ◽  
pp. 1542-1549 ◽  
Author(s):  
Peter H. Nishimura ◽  
Colin P. Laroque
Keyword(s):  
Black Spruce ◽  
Grid Point ◽  
Regional Scale ◽  
Single Site ◽  
Systematic Sampling ◽  
Larix Laricina ◽  
Regional Trends ◽  
Larch Sawfly ◽  
History Of ◽  
Spatio Temporal

As many insect outbreak reconstructions are typically based on targeted single-site sampling, researchers have often been limited in their ability to draw conclusions about regional trends as opposed to local trends in the data. The results of this paper demonstrate the value of a systematic sampling design when studying spatio-temporal processes that can vary greatly within large continuous areas of forest. Many single-site research programs have been conducted to reconstruct the history of larch sawfly ( Pristiphora erichsonii Htg.) outbreaks in the eastern boreal region of North America. However, no such research has yet been conducted in the region of Labrador. In an attempt to illustrate the strength of a systematic gridded sampling protocol over a single-site study, we sampled a 12-site grid in western Labrador. Dominant and codominant species were sampled at each grid point, resulting in 24 master chronologies. Six eastern larch ( Larix laricina (Du Roi) K. Koch) chronologies (host) and a regional black spruce ( Picea mariana (Mill.) Britton, Sterns, Poggenb.) chronology (nonhost) were used to establish a host–nonhost analysis of past sawfly outbreaks on a regional scale. Both regional and localized larch sawfly outbreaks were identified, but in general, larch sawfly outbreaks in western Labrador appeared to be spatially synchronous and regional in scale.

Eastern European Jewry in the Modern Period: 1750–1939

2009 ◽  
Author(s):  
Michael Stanislawski
Keyword(s):  
Eastern Europe ◽  
Jewish Life ◽  
Eastern European ◽  
East European ◽  
The Past ◽  
Modern Age ◽  
Modern Period ◽  
The Holocaust ◽  
The World ◽  
History Of

This article notes that the study of the modern history of East European Jews is not a field driven at present by deep conceptual or ideological divides or abiding scholarly or methodological controversies. The past debates on this score between Israeli and diaspora Jewish scholarship have all but disappeared, as has even more dramatically the attempt at a Marxist version of juedische Wissenschaft. While the major works of the founders of the field from Simon Dubnov on ought to be studied and the impressive resurgence of interest in the history and culture of East European Jewry in the modern age is underway, the work is still largely undone. The crucial challenge to the field is not to succumb to the lachrymose and romanticized stereotypes of Jewish life in Eastern Europe while continuing to explore the history of this the largest Jewry in the world before the Holocaust.

scholarly journals Wearing images. Introduction = Imágenes portadas. Introducción

2018 ◽  
pp. 15
Author(s):  
Diane H. Bodart
Keyword(s):  
Early Modern ◽  
Early Modern Period ◽  
Social Practices ◽  
The Body ◽  
The Past ◽  
Art Object ◽  
Modern Period ◽  
History Of Art ◽  
History Of ◽  
Modes Of Interaction

In the past decades, studies on the materiality and the efficacy of images, as well as the artistic and social practices related to them, have allowed scholars to explore how much images’ making, use, handling and display contributed to the activation of their powers of presence through their interaction with the viewer. Further, the growing interest in the articulation between the history of art and the anthropology of images has brought to light the close links between the art object and the body: in fact, if the body can be the medium of the animate art object, the art object can potentially act as a substitute of the animate body. But what happens when the body is the support of a distinctive image, when it inscribes an image on its own surface, whether directly on the skin or through intermediary props such as clothing or corporeal parure? Wearing Images investigates the different modes of interaction between the image and the body that wears it in the Early-Modern period, when devotional, political, dynastic or familial images could be worn as medals, jewels, badges, embroidered garments or tattoos.En las últimas décadas, los estudios sobre la materialidad y la eficacia de las imágenes, así como de las prácticas artísticas y sociales asociadas a ellas, han permitido a los historiadores explorar hasta qué punto la fabricación de las imágenes, su uso, manejo y exhibición contribuyó a activar sus capacidades de presentarse a través de su interacción con el espectador. Además, el creciente diálogo entre la historia del arte y la antropología de las imágenes ha puesto de relieve las estrechas conexiones entre el objeto artístico y el cuerpo: en efecto, si el cuerpo puede ser el medio para el objeto artístico animado, el objeto artístico puede actuar potencialmente como sustituto del cuerpo animado. Pero ¿qué ocurre cuando el cuerpo es el soporte de una imagen distintiva, cuando inscribe una imagen en su propia superficie, ya sea directamente en la piel o a través de intermediarios como el vestido o un adorno? Wearin Images investiga las diferentes modalidades de interacción entre la imagen y el cuerpo que se viste con ella en la Edad moderna, en una época en la que imágenes devocionales, políticas, dinásticas o familiares podían vestirse como medallas, joyas, placas, prendas bordadas o tatuajes.

Writing the past in early-modern Ireland: Anglesey, Borlase and the craft of history

2016 ◽  
Vol 40 (158) ◽  
pp. 171-191
Author(s):  
Eamon Darcy
Keyword(s):  
Seventeenth Century ◽  
Early Modern ◽  
Early Modern Period ◽  
History Writing ◽  
Profound Change ◽  
The Past ◽  
Modern Period ◽  
Political Factions ◽  
History Of ◽  
Historical Methods

AbstractThe draft notes for a proposed history of Ireland compiled by Arthur Annesley, the first earl of Anglesey, and letters to Edmund Borlase, author of The history of the execrable Irish rebellion (London, 1680), which describe the reception of his work in England and Ireland, offer a convenient keyhole through which historians can investigate the craft of history writing in the early-modern period. While there has been much discussion of these authors and their contribution to wider political (and highly partisan) debates concerning the Popish Plot and the Exclusion Crisis, less has been said about the historical methods they employed to understand the past. While this article does not deny that both authors attempted to defend their own political factions and views, it argues that a focus on the partisan nature of their contributions neglects the historiographical context to what they produced. Both Anglesey’s and Borlase’s research and writing occurred at a time of profound change in history writing as readers were becoming increasingly critical of works they read and authors engaged in sustained attempts to understand deep-lying causes of the various crises that engulfed the three kingdoms. The purpose of this article, therefore, is to illustrate how both Anglesey and Borlase’s ‘histories’ reflected this historiographical turn in the late-seventeenth century.

Seasonal growth of black spruce and tamarack roots in an Alberta peatland

1993 ◽  
Vol 71 (2) ◽  
pp. 359-360 ◽  
Author(s):  
Timothy S. S. Conlin ◽  
Victor J. Lieffers
Keyword(s):  
Root Growth ◽  
Key Words ◽  
Picea Mariana ◽  
Black Spruce ◽  
Growing Season ◽  
Plant Roots ◽  
Larix Laricina ◽  
Soil Cores ◽  
Seasonal Growth

Seasonal growth of black spruce (Picea mariana Mill. BSP) and tamarack (Larix laricina (Du Roi) K. Koch) roots in an Alberta peatland were assessed by measuring growth into emplaced soil cores that did not contain plant roots. Five cores were positioned 1 m from the base of each tree and 10 replicates of this treatment were used for each species. Sequential lifting of these cores during the growing season showed that root growth by these species did not begin until midsummer. Tamarack root growth was restricted to August and September, while black spruce root growth continued into October. Key words: flooding, Larix laricina, peatland, phenology, Picea mariana, temperature, root growth.

Sign in / Sign up

Export Citation Format

Share Document