174,334 research outputs found
Ptolémée II Philadelphe (286-5 - 247-6 A. C.) et les indigènes égyptiens
No full textPeremans Willy. Ptolémée II Philadelphe (286-5 - 247-6 A. C.) et les indigènes égyptiens. In: Revue belge de philologie et d'histoire, tome 12, fasc. 4, 1933. pp. 1005-1022
Long-term disturbance ecology
No full textStudy object and approaches
Disturbance is a short-lasting event or a series of distinct brief events (lasting hours to days) that alter vegetation or ecosystem conditions, potentially releasing ecological and environmental trajectories that may continue over decades to centuries. Natural disturbance agents might be fire, browsing, pests, wind, frost, heat, floods, volcanic eruptions, avalanches, landslides or rockfalls. Some disturbances such as fire and browsing might be prevalently caused by human impact. Climate-change impacts act at different temporal scales and are thus usually not considered as disturbances. Indeed climate change is defined by a series of weather conditions over decades (>30 years) and deals more with averages (e.g. mean July temperatures, mean annual temperatures) than extremes or singularities (IPCC, 2013), which are characteristic for disturbance. Palaeoecological climate-impact studies thus usually have multi-decadal temporal resolutions, while disturbance- impact studies should possess decadal resolutions, ideally 5-10 years (Birks, 1997b). The higher temporal resolution needed for the reconstruction of disturbance ecology from sedimentary records is explained by short-lived processes that might be overlooked if resolutions are coarser than c. 10 years. For instance, a fire event may release widespread successional trajectories involving intermediate community stages, as observed in Yellowstone National Park in 1988 (Whitlock and Millspaugh, 1996). In the case of non-contiguous sampling, missing the one sample or year containing the disturbance signal (e.g. fire) may mean failing to attribute the resulting vegetational pattern to the right forcing. Moreover, having resolutions coarser than 10 years may result in a dilution of the disturbance signal (and thus its gradual loss) and/or the non-recognition of short-lived terrestrial plants (e.g. expansions of Epilobium angustifolium, Anemone, Mentha, Urtica, Cichorioideae, Poaceae, Rosaceae) or fungi such as Sporormiella (Tinner et al., 1999, 2008; Gobet et al., 2003; Schwörer et al., 2015). Similarly, disturbance impacts may be quick and transient in aquatic ecosystems, as shown by expansions of macrophytes such as Typha latifolia and Nymphaea alba in response to fire-related nutrient input (Tinner et al., 1999) or of diatoms such as Achnanthes minutissima, Aulacoseira, Asterionella formosa and Fragilaria brevistriata after volcanic eruptions (Birks and Lotter, 1994)
H. H. Scullard, Roman Politics 220-150 B. C.
No full textPeremans Willy. H. H. Scullard, Roman Politics 220-150 B. C.. In: L'antiquité classique, Tome 21, fasc. 1, 1952. pp. 205-207
To what extent the characters Eliza Doolittle and Susan “Rita” White—from the plays “Pygmalion” and “Educating Rita” respectively—are similar in terms of their ambitions, efforts, and expectations
No full textThe aim of this extended essay is to compare and contrast two characters in two different
plays—George Bernard Shaw’s “Pygmalion” and Willy Russell’s “Educating Rita”—in
terms of the difficulties they face, their ambitions and efforts, and their expectations from
the course. Despite taking place in different times, these two plays share common themes
such as education and self-development. “Pygmalion” takes place in the Victorian era in
which social distinctions are seen between the classes. On the other hand, “Educating Rita”
takes place in a much more modern world. In this time there isn’t as much class distinction
and life conditions are better than during the Victorian era. These two different
approaches to the self-development of individuals have common points as well as
contradictory ones. These important differences and similarities are the subjects of this
essay
Crousen (J. M. C). De he rhalings figuren in de stijl van Quintus Curtius Rufus. Anaphora, paronomasia, allitteratio, homoioteleuton
No full textEvenepoel Willy. Crousen (J. M. C). De he rhalings figuren in de stijl van Quintus Curtius Rufus. Anaphora, paronomasia, allitteratio, homoioteleuton. In: Revue belge de philologie et d'histoire, tome 53, fasc. 1, 1975. Antiquité — Oudheid. pp. 145-147
Treeline and timberline dynamics
No full textPolar treeline and timberline
Today’s polar treeline runs along the northernmost part of Fennoscandia and further along the northern edge of the Kola Peninsula and the northern Russian mainland. In continental northern Russia the limit of tree growth (>2–3 m growth height) lies only slightly to the north of the Arctic Circle (66°32’ N) and is formed by Picea abies ssp. obovata, while in oceanic Fennoscandia it goes beyond 71° N and consists of Betula pubescens ssp. tortuosa. South of the polar treeline, dwarf shrub tundra, open birch stands and isolated birch and pine forests form vegetation mosaics. These parklands build the forest tundra and are bordered to the south by closed Pinus sylvestris forests that form the polar timberline (or forest limit) between 69° and 70° N. The polar treeline and timberline represent heat-deficiency limits, whereby, as a rough rule, the minimum for the existence of conifer trees (>2–3 m) is assumed to be 30 days per year with a temperature average above 10°C (e.g. Walter and Breckle, 1986). The global polar treeline has also been associated with growing seasons of 90– 106 days and seasonal mean temperatures between 5.1 and 6.9°C, similar to other treeline positions in the world (6.4 ± 0.7°C; Körner, 2012)
C. Dekker. Een schamele landstede. Geschiedenis van Goes tot aan de Satisfactie in 1577
No full textSteurs Willy. C. Dekker. Een schamele landstede. Geschiedenis van Goes tot aan de Satisfactie in 1577. In: Revue belge de philologie et d'histoire, tome 82, fasc. 4, 2004. Histoire médiévale, moderne et contemporaine - Middeleeuwse. moderne en hedendaagse geschiedenis. pp. 1171-1172
C. Dekker. Een schamele landstede. Geschiedenis van Goes tot aan de Satisfactie in 1577
No full textSteurs Willy. C. Dekker. Een schamele landstede. Geschiedenis van Goes tot aan de Satisfactie in 1577. In: Revue belge de philologie et d'histoire, tome 82, fasc. 4, 2004. Histoire médiévale, moderne et contemporaine - Middeleeuwse. moderne en hedendaagse geschiedenis. pp. 1171-1172
J. Miller. Bericht über die Literatur zur Geschichte des römischen Reiches in der Zeit von Diocletian bis Theodosius I (284-395 n. C.) aus den Jahren 1915-1932, in C. Bursian - K. Münscher. Jahresbericht über die Fortschritte der klassischen Altertumswissenschaft, T. XLI
No full textPeremans Willy. J. Miller. Bericht über die Literatur zur Geschichte des römischen Reiches in der Zeit von Diocletian bis Theodosius I (284-395 n. C.) aus den Jahren 1915-1932, in C. Bursian - K. Münscher. Jahresbericht über die Fortschritte der klassischen Altertumswissenschaft, T. XLI. In: L'antiquité classique, Tome 5, fasc. 2, 1936. pp. 477-478
J. Miller. Bericht über die Literatur zur Geschichte des römischen Reiches in der Zeit von Diocletian bis Theodosius I (284-395 n. C.) aus den Jahren 1915-1932, in C. Bursian - K. Münscher. Jahresbericht über die Fortschritte der klassischen Altertumswissenschaft, T. XLI
No full textPeremans Willy. J. Miller. Bericht über die Literatur zur Geschichte des römischen Reiches in der Zeit von Diocletian bis Theodosius I (284-395 n. C.) aus den Jahren 1915-1932, in C. Bursian - K. Münscher. Jahresbericht über die Fortschritte der klassischen Altertumswissenschaft, T. XLI. In: L'antiquité classique, Tome 5, fasc. 2, 1936. pp. 477-478
- …
