Tree-line dynamics in Ungava peninsula,northern Quebec

The characteristics of the present tree-line in continental Northern Quebec appear to be related to modern and past ecological conditions. ¹⁴C dating of fossil trees and charcoal, and age structure of tree populations are used as evidence of tree-line dynamics over the last 400 yr. As inferred from the reproductive strategies of the two tree species, black spruce Picea mariana (Mill.) BSP, and Tamarack Larix laricina (DuRoi) K. Koch, forming the present tree-line populations, major changes during postglacial time in Northern Quebec are not only concerned with tree-line position, but also with tree-line composition. The present tree-line is made by larch (or tamarack) and corresponds to its natural seed regeneration limit. Black spruce probably reached its northernmost holocene latitudes during a warmer period and it then formed the tree-line. During the Little Ice Age, fires destroyed large tracks of forest and black spruce krummholz (400, and 250–200 yr ago); afterwards, tree species reestablished only in protected sites, and exposed sites were not reseeded. At some places, fires did not burn completely the forest cover, and preserved isolated trees and small groves probably became locus of reafforestation. Differential forest regeneration and tree age structure suggest that fire and climate are intimately associated in controlling tree population dynamics. Favourable and less favourable forest regeneration periods are inferred from these data and it is suggested that tree-line displacements in Northern Quebec during the last 400 yr were less important than in the Northwest Territories.     

After the quiet revolution: Quebec anthropology and the study of Quebec

The Ahaggar Twareg are herders of camels and small‐stock who live in the desert of southern Algeria. Their society is divided into categories of noblemen, tributaries and slaves. This article, which deals with the colonial and pre‐colonial period, demonstrates how among the two first mentioned classes, male supremacy over women builds upon men's control over the process that create exchange‐value rather than use‐value. The author also describes how the gender‐based and class‐based forms of labour division interlock.     

Canadian rotifers II. Parc Mont Tremblant,Quebec

Nine lakes in Mont Tremblant Provincial Park were investigated during summer and fall. Data on lake morphometry and water chemistry are tabulated. Most lakes were oligotrophic, some were dystrophic bog lakes. They contain a rich rotifer fauna and some very rare species, which are described in detail.     

Hereditary disorders in Saguenay-Lac-St-Jean (Quebec, Canada)

Saguenay-Lac-St-Jean is a geographically isolated region located in northeastern Quebec. Opened to the white settlement in 1938, its immigrants mainly came from Charlevoix, another isolated region of Quebec. The prevalence and/or incidence of several autosomal dominant and recessive disorders are very high. The overall birth prevalence of the recessive disorders was calculated at 1/207 living births and the overall carrier rate at 1/7 inhabitants. This situation may be explained by migration and social factors.