scholarly journals Linking radial growth patterns and moderate‐severity disturbance dynamics in boreal old‐growth forests driven by recurrent insect outbreaks: A tale of opportunities, successes, and failures

2020 ◽  
Author(s):  
Maxence Martin ◽  
Cornélia Krause ◽  
Hubert Morin
Keyword(s):  
Radial Growth ◽  
Growth Patterns ◽  
Insect Outbreaks ◽  
Old Growth ◽  
Moderate Severity ◽  
Disturbance Dynamics ◽  
Old Growth Forests ◽  
Successes And Failures

Radial growth patterns of dominant trees in two old-growth forests in eastern Fennoscandia

2011 ◽  
Vol 16 (3) ◽  
pp. 228-236 ◽  
Author(s):  
Laura Niukkanen ◽  
Timo Kuuluvainen
Keyword(s):  
Radial Growth ◽  
Growth Patterns ◽  
Old Growth ◽  
Old Growth Forests

scholarly journals Unveiling the Diversity of Tree Growth Patterns in Boreal Old-Growth Forests Reveals the Richness of Their Dynamics

Forests ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 252 ◽  
Author(s):  
Maxence Martin ◽  
Cornélia Krause ◽  
Nicole J. Fenton ◽  
Hubert Morin
Keyword(s):  
Radial Growth ◽  
Growth Patterns ◽  
Radial Increment ◽  
Forest Types ◽  
Eastern Canada ◽  
Old Growth ◽  
Growth Trends ◽  
Silvicultural Treatments ◽  
Old Growth Forest ◽  
Old Growth Forests

Research Highlights: Radial growth patterns of trees growing in old-growth boreal forests in eastern Canada can be grouped into a small number of simple patterns that are specific to different old-growth forest types or successional stages. Background and Objectives: Identifying the main radial growth trends in old-growth forests could help to develop silvicultural treatments that mimic the complex dynamics of old-growth forests. Therefore, this study aimed to identify the main radial growth patterns and determine how their frequencies change during forest succession in old-growth forests, focusing on boreal landscapes in eastern Canada. Materials and Methods: We used dendrochronological data sampled from 21 old-growth stands in the province of Quebec, Canada. Tree-ring chronologies were simplified into chronologies of equal length to retain only primary growth trends. We used k-means clustering to identify individual growth patterns and the difference in growth-pattern frequency within the studied stands. We then used non-parametric analyses of variance to compare tree or stand characteristics among the clusters. Results: We identified six different growth patterns corresponding to four old-growth forest types, from stands at the canopy breakup stage to true old-growth stands (i.e., when all the pioneer cohort had disappeared). Secondary disturbances of low or moderate severity drove these growth patterns. Overall, the growth patterns were relatively simple and could be generally separated into two main phases (e.g., a phase of limited radial increment size due to juvenile suppression and a phase of increased radial increment size following a growth release). Conclusions: The complexity of old-growth forest dynamics was observed mainly at the stand level, not at the tree level. The growth patterns observed in true old-growth forests were similar to those observed following partial or stem-selection cuts in boreal stands; thus, these silvicultural treatments may be effective in mimicking old-growth dynamics.

scholarly journals Secondary disturbances of low and moderate severity drive the dynamics of eastern Canadian boreal old-growth forests

2019 ◽  
Vol 76 (4) ◽  
Author(s):  
Maxence Martin ◽  
Hubert Morin ◽  
Nicole J. Fenton
Keyword(s):  
Old Growth ◽  
Moderate Severity ◽  
Old Growth Forests

Successional replacement of old-growth white oak by mixed mesophytic hardwoods in southwestern Pennsylvania

1990 ◽  
Vol 20 (12) ◽  
pp. 1864-1870 ◽  
Author(s):  
Marc D. Abrams ◽  
Julie A. Downs
Keyword(s):  
Radial Growth ◽  
Forest Type ◽  
Growth Patterns ◽  
White Oak ◽  
Importance Value ◽  
Old Growth ◽  
Canopy Position ◽  
Mesic Site ◽  
Southwestern Pennsylvania ◽  
Understory Trees

Presettlement forests in southwestern Pennsylvania were dominated by Quercusalba L. A relatively undisturbed remnant of this forest type on a mesic site was surveyed to investigate the successional status of Q. alba in the region. This old-growth stand is now dominated by Fagusgrandifolia Ehrh., Acerrubrum L., and Liriodendrontulipifera L., representing 62% of the importance value total. Oaks (Q. alba, Q. rubra L., and Q. velutina Lam.) totalled only 18% of the importance value total. The overstory mainly comprised L. tulipifera, F. grandifolia, Q. alba, and Nyssasylvatica Marsh. Acerrubrum and Prunusserotina Ehrh. were the most abundant seedlings, and few saplings of any species were present. The oldest and largest trees were oak, with two Q. alba >300 years. Over 90% of all trees were <120 years old, including many F. grandifolia, L. tulipifera, A. rubrum, and A. saccharum Marsh., but few oaks. Logging of several trees in the 1930–1940s apparently accelerated the speed of obtaining dominance for these mixed mesophytic species. Radial growth patterns varied with species and canopy position. On average, the oldest oaks exhibited slow radial growth of <0.75 mm/year. Many understory trees had average radial growth of >1.5–2.0 mm/year and exhibited a release in growth associated with logging in the 1930–1940s. We believe this forest represents a primary example of an advanced stage of oak replacement by mixed mesophytic species, a process that seems inevitable in many eastern forests.

STAND AND LANDSCAPE-LEVEL DISTURBANCE DYNAMICS IN OLD-GROWTH FORESTS IN WESTERN MASSACHUSETTS

2008 ◽  
Vol 78 (4) ◽  
pp. 507-522 ◽  
Author(s):  
Anthony W. D'Amato ◽  
David A. Orwig
Keyword(s):  
Old Growth ◽  
Disturbance Dynamics ◽  
Old Growth Forests ◽  
Landscape Level ◽  
Level Disturbance

Northwest Forest Plan–the first 15 years (1994–2008): status and trends of late-successional and old-growth forests

2011 ◽  
Author(s):  
Melinda Moeur ◽  
Janet L. Ohmann ◽  
Robert E. Kennedy ◽  
Warren B. Cohen ◽  
Matthew J. Gregory ◽  
...  
Keyword(s):  
Old Growth ◽  
Status And Trends ◽  
Old Growth Forests ◽  
Northwest Forest Plan

Alternatives to clearcutting in the old-growth forests of southeast Alaska: study plan and establishment report.

2000 ◽  
Author(s):  
Michael H. McClellan ◽  
Douglas N. Swanston ◽  
Paul E. Hennon ◽  
Robert L. Deal ◽  
Toni L. de Santo ◽  
...  
Keyword(s):  
Old Growth ◽  
Southeast Alaska ◽  
Old Growth Forests ◽  
Study Plan
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