Mortality and stand renewal patterns following the last spruce budworm outbreak in mixed forests of western Quebec

Bouchard, Mathieu; Kneeshaw, Daniel; Bergeron, Yves

doi:10.1016/j.foreco.2004.09.017

Cited by 58 publications

(61 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…At the landscape scale for example, Bouchard et al (2006b) found that sites on upper slope positions are more favorable for the invasion of birch species in mixed forests of western Quebec. Over regional or subcontinental spatial scales, conditions for the recruitment of balsam fir are generally adequate in boreal or maritime regions (MacLean and Ostaff 1989;Morin 1994;Leblanc and Bélanger 1998), whereas invasion by nonhost species following spruce budworm outbreaks is frequently mentioned in subboreal or continental climates (Batzer and Popp 1985;MacLean 1988;Osawa 1994;Bergeron 1998, 1999;Bouchard et al 2005). However, postoutbreak stand dynamics have rarely been compared directly between regions with a homogenous methodology, with the exception of Ghent et al (1957), who found that the shortterm effect of the 1950 spruce budworm outbreak on forest regeneration varied at different locations along the Quebec-Ontario border.…”

Section: Introductionmentioning

confidence: 99%

Forest dynamics following spruce budworm outbreaks in the northern and southern mixedwoods of central Quebec

2007

Self Cite

View full text Add to dashboard Cite

Abstract:The effects of 20th century spruce budworm (Choristoneura fumiferana (Clem.)) outbreaks on forest dynamics was examined in the southern and northern parts of the mixedwood forest zone in central Quebec, Canada. In each region, three study areas were placed in unmanaged stands that had not burned for more than 200 years. Disturbance impacts and forest succession were evaluated using aerial photographs and dendrochronology. Spruce budworm outbreaks occurred around 1910, 1950, and 1980 in both regions. The 1910 outbreak seemed to have limited impact in both regions, and the 1950 outbreak caused heavy mortality in conifer stands (mostly of balsam fir, Abies balsamea (L.) Mill.) in the southern region. The 1980 outbreak caused major mortality in the northern region, but had little impact in the southern region. Successive spruce budworm outbreaks led to a massive invasion by hardwood species in the last century in the southern region but not in the northern region. The reason for such contrasting dynamics between regions is unknown, but we hypothesize that differences in disturbance intensities, influenced by climate, played a major role. Results from this study emphasize that generalizations about the effect of spruce budworm outbreaks on forest dynamics cannot be derived from observations made during a single outbreak or at a single location.Résumé : L'effet des épidémies de tordeuse des bourgeons de l'épinette (Choristoneura fumiferana (Clem.)) du 20 e siècle sur la dynamique forestière a été examiné dans les parties sud et nord de la zone de forêt mixte du centre du Québec, au Canada. Dans chaque région, trois aires d'étude ont été placées dans des peuplements non-aménagées n'ayant pas brûlé depuis plus de 200 ans. L'impact des perturbations et la succession forestière ont été évalués à l'aide de photographies aériennes et de la dendrochronologie. Des épidémies de tordeuse des bourgeons de l'épinette sont survenues vers 1910, 1950 et 1980 dans les deux régions. L'épidémie des années 1910 parait avoir eu un impact limité dans les deux régions, et l'épidémie des années 1950 a causé une mortalité sévère dans les peuplements conifériens (principalement du sapin baumier, Abies balsamea (L.) Mill.) dans la région sud. L'épidémie des années 1980 a causé une mortalité sévère dans la région nord, mais a eu un faible impact dans la région sud. Les épidémies successives de tordeuse des bourgeons de l'épinette ont conduit à une invasion massive par les essences feuillues dans la région sud, mais pas dans la région nord. La raison expliquant un tel contraste entre les régions demeure inconnue, mais nous proposons l'hypothèse que des différences dans l'intensité des perturbations, influencées par le climat, ont joué un rôle important. Les résultats de cette étude suggèrent que des généralisations portant sur les effets d'épidémies de tordeuse des bourgeons de l'épinette sur la dynamique forestière ne peuvent être dérivées à partir d'observations effectuées dans une seule région ou après une seule épidémie.

show abstract

Section: Introductionmentioning

confidence: 99%

Forest dynamics following spruce budworm outbreaks in the northern and southern mixedwoods of central Quebec

2007

Self Cite

View full text Add to dashboard Cite

show abstract

“…The last outbreak occurred from 1974 to 1984 [26]. Peak of mortality in mixedwood stands was observed around 1977 [24] with minimum growth of host species occurring in 1978.…”

Section: Discussionmentioning

confidence: 99%

Growth Response of Northern White-Cedar (Thuja occidentalis) to Natural Disturbances and Partial Cuts in Mixedwood Stands of Quebec, Canada

Ruel

Lussier

Morissette

et al. 2014

Forests

View full text Add to dashboard Cite

Northern white-cedar (Thuja occidentalis) is a species of high commercial and ecological value, the abundance of which has been declining since the middle of the 19th century. Very little information regarding its silviculture in mixedwood stands is currently available, even though a significant portion of wood resources comes from these stands. The present study is a retrospective analysis of white-cedar growth in partially harvested mixedwood stands of western Quebec, Canada. Eight stands distributed across two regions were analyzed. Dendrochronological approaches examined long-term diameter growth for sample white-cedar trees and stems of associated species. These approaches were used to reconstruct stand characteristics at the time of harvesting, together with local harvesting intensity. The study demonstrated white-cedar’s capacity to maintain good growth for long periods of time and at large tree sizes. Accession to the upper canopy positions occurs through repeated episodes of suppression/release, most of which seem to be associated with spruce budworm (Choristoneura fumiferana) outbreaks. White-cedar response to partial harvesting varies with tree size, residual basal area and species composition. Growth response was generally stronger for small trees, even though large trees still maintained the best diameter growth. Growth of white-cedar was negatively affected by an increase in softwood proportion in basal area. Growth responses to harvesting could be sustained for a period of 20 years.

show abstract

“…A frequent stand classification criterion used in research studies is often based on the number of species [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] with no reference to the species proportion in the mixture and their spatial arrangement. Few references are found with the proportion of the number of trees and basal area [38][39].…”

Section: Pure Stands Vs Mixed Standsmentioning

confidence: 99%

Multi-Species Stand Classification: Definition and Perspectives

Gonçalves¹

2017

Forest Ecology and Conservation

View full text Add to dashboard Cite

The increasing demands for products and services from forests enhanced new approaches to stand composition, structure, and management, which encompass multiple use systems, frequently mixed either even aged or uneven aged. Stand classification is frequently based on one density measure (number of trees, basal area, volume or crown cover). As no standard criteria exist, the direct comparison between the different stand classifications is difficult. This created a need for a stand classification that incorporates not only the forest species and composition but also their horizontal and vertical arrangements. The four criteria stand classification incorporates the number of species and their proportion, their horizontal and vertical distribution. The application of this methodology enables an integrated approach, bridging the gap between composition and stand structure. Its use in the National Forest Inventories and in research studies is simple, as shown in the two cases of study presented. It also allows the evaluation of stands in a certain moment in time and their dynamics.

show abstract

Mortality and stand renewal patterns following the last spruce budworm outbreak in mixed forests of western Quebec

Cited by 58 publications

References 31 publications

Forest dynamics following spruce budworm outbreaks in the northern and southern mixedwoods of central Quebec

Forest dynamics following spruce budworm outbreaks in the northern and southern mixedwoods of central Quebec

Growth Response of Northern White-Cedar (Thuja occidentalis) to Natural Disturbances and Partial Cuts in Mixedwood Stands of Quebec, Canada

Multi-Species Stand Classification: Definition and Perspectives

Contact Info

Product

Resources

About