Following the appointment of the new Cabinet, the Forest Sector now reports to the ministère des Ressources naturelles et des Forêts, while the Wildlife and Parks Sectors report to the ministère de l'Environnement, de la Lutte aux changements climatiques, de la Faune et des Parcs. Adjustments will be made to the website over time.
Poplar culture: a collaborative effort from clone to mill. In: Périnet, P., M. Perron et P. Bélanger (eds.). Field Trip Guide. 2007 Annual Meeting of the Poplar Council of Canada. September 16-21, 2007. Rivière-du-Loup et Québec, Canada. 83 p.
Poplar culture: a collaborative effort from clone to mill. Conference Handbook to the 2007 Annual Meeting of the Poplar Council of Canada. September 16-21, 2007. Rivière-du-Loup et Québec, Canada. 79 p.
Forêt Québec, one of the sectors within the ministère des Ressources naturelles et de la Faune du Québec, has the mandate of administering the various facets of sustainably managing Québec’s public forests, and of contributing to the development of the forest products industry and private woodlots. Within this broad framework, the mission of the Direction de la recherche forestière (DRF) is to participate in improving forest practices in Québec by undertaking research and development projects in diverse fi elds and by ensuring the transfer of know-how to practising foresters.
The Poplar Council of Canada (PCC) is a national non-profi t organization committed to the wise use, conservation, and sustainable management of Canada’s poplar resources. PCC, fi rst established in 1977, has members from industry, wood lot owners, universities, research establishments, and provincial and federal governments. The principal objective of the CPC/PCC 2007 meeting is to share advances in poplar research in Canada and other countries, and to present various aspects of poplar culture with a number of cases from the Témiscouata area. This year’s theme, “Poplar Culture: a Collaborative Effort from Clone to Mill”, emphasizes the synergy achieved from cooperative efforts shared among poplar growers in the Bas-Saint-Laurent region.
In 1998, under the leadership of Hervé Gagnon (DRF) with the collaboration of the Direction régionale des forêts du Bas-Saint-Laurent and three organisms involved with poplar culture, a new research project was initiated to evaluate poplar varieties obtained from breeding for the region. Since the beginning, funding was provided through the Programme de mise en valeur des ressources du milieu forestier (Volet 1). Ten years later, we have the opportunity to visit some plantations established in the Témiscouata area, where over 500 trees were selected in 2006 with in the hybrid progenies planted in Packington. The best ones will eventually replace the old clones planted in the area, and new parent trees will also be selected from the introduced species collections for future breeding.
Integrated research activities for supply of improved larch to tree planting: tree improvement, floral biology and nursery production. Proceedings/Actes. LARIX 2007: International Symposium of the IUFRO Working Group S2.02.07 (Larch Breeding and Genetic Resources). September 16-21, 2007. Saint-Michel-des-Saints et Québec, Canada. 149 p.
Published in For. Sci. 53(4): 529-539.
In recruitment modeling, the response variable is a count and its distribution is often characterized by an excess number of zeros. As a result, standard distributions of probabilities, such as Poisson, are inappropriate. A common approach in forestry consists of using two-part conditional models. These models have two distinct components aimed to predicting the occurrence and abundance of recruitment, respectively. For such data, zero-inflated models might provide a more adequate framework by combining the two components into a joint distribution of probabilities. In this article, a conditional model is compared with two different zero-inflated models, namely, a zero-inflated Poisson (ZIP) and a zero-inflated discrete Weibull (ZIdiW) model. The three models were calibrated using a data set provided by permanent sample plots located in hardwood stands. Parsimony criteria (the Akaike information criterion and the Bayesian information criterion) and diagnostic plots were used to perform the comparison. The results show that the ZIdiW model has the best fit. The flexibility of the Weibull function and the possibility of obtaining a more parsimonious model are two advantages related to the use of a ZIdiW model in recruitment modeling.
Published in Canadian Journal of Forest Research 37: 1118-1133
We assessed the organic C stocks and inferred their changes in vegetation biomass, forest floor, and soil using a 50 year chronosequence of red pine (Pinus resinosa Ait.) plantations established on postagricultural fields in southern Québec, Canada. The data come from soil and tree field surveys carried out in the 1970s in 348 sites. Organic C concentrations were usually measured in three major mineral soil horizons; for the remaining soil horizons, they were estimated using pedotransfer functions. The effect of soil order, drainage, and texture was analysed. Over 22 years, organic C accumulation rates (Mg C.ha-1.year-1) were 1.66 + 0.03 in vegetation biomass, 0.56 + 0.07 in forest floor, 0.86 + 0.47 in loamy soils (0-100 cm), and -0.18 + 0.24 in sandy soils (0-100 cm). The greater rate of C accumulation in loamy soils was due to the contribution of the 30-100 cm subsoil layer. The overall net accumulation of organic C in these plantation ecosystems was estimated to 51.4 + 4.8 Mg C.ha-1 at 22 years. Soils of these plantations acted as a C sink in the first two decades, particularly in loamy soils compared with sandy soils, with no major differences among soil order or drainage.
