Regeneration beneath lodgepole pine dominated stands attacked or threatened by the mountain pine beetle in the south central Interior, British Columbia

Vyse, Alan; Ferguson, Christine; Huggard, David J.; Roach, Jean; Zimonick, Barbara

doi:10.1016/j.foreco.2009.08.027

Cited by 35 publications

(40 citation statements)

References 3 publications

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“…Regardless, naturally regenerating species are likely to play a vitally important role in ecosystem function because they will fill the gaps if lodgepole pine continues to decline in health. Advance regeneration of secondary species, particularly of subalpine fir, is also sufficiently abundant in lodgepole pine stands killed by mountain pine beetle to contribute to future timber supply in interior British Columbia (Vyse et al 2009). …”

Section: Discussion Trends In Total Stand Densitymentioning

confidence: 99%

Decline of planted lodgepole pine in the southern interior of British Columbia

Mather¹,

Simard²,

Heineman³

et al. 2010

The Forestry Chronicle

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Lodgepole pine is extensively planted across western Canada but little is known about development of these stands beyond the juvenile stage. We quantified stocking status and damage incidence in sixty-six 15-to 30-year-old lodgepole pine plantations that had previously been declared free-growing in the southern interior of British Columbia. The stands were located in six biogeoclimatic zones: Engelmann Spruce-Subalpine Fir (ESSF), Montane Spruce (MS), Interior Cedar-Hemlock (ICH), Interior Douglas-fir (IDF), Sub-Boreal Spruce (SBS), and Sub-Boreal Pine-Spruce (SBPS). Freegrowing standards were no longer met on 27% of plantations, with the worst performance (70% no longer free-growing) in the Interior Cedar-Hemlock forests. Natural regeneration was common but it was half the size of lodgepole pine. Biotic damage, especially hard pine stem rusts, was the dominant factor reducing free-growing densities. Stands were at greater risk of reduced stocking where summer precipitation was higher or soil moisture regimes were wetter and where stands had been broadcast-burned prior to planting or received secondary treatments of brushing or pruning. Reforestation policies that encourage widespread planting of lodgepole pine, particularly in areas where lodgepole pine has limited natural occurrence such as in the ICH zone, should be reconsidered given that health problems are extensive and are expected to increase with climate change.Key words: Pinus contorta, lodgepole pine, free-growing, stocking, forest health, damage, disease résumé Le pin lodgepole est planté à grande échelle partout dans l'Ouest canadien, mais on sait peu de chose sur le développe-ment de ces peuplements au-delà du stage juvénile. Nous avons quantifié la densité relative et l'incidence des dégâts de 66 plantations de pin lodgepole âgées de 15 à 30 ans qui avaient été déclarées comme étant établies et retrouvées dans la zone intérieure sud de la Colombie-Britannique. Les peuplements étaient répartis entre six zones biogéoclimatiques : épinette d'Engelmann -sapin subalpin (ESSF), épinette alpestre (MS), pruche-cèdre -intérieur (ICH), Douglas taxifolié -intérieur (IDF), épinette des forêts boréales moyennes (SBS) et épinette et pin des forêts boréales moyennes (SBSP). Les normes utilisées pour fin d' établissement de la plantation n' étaient plus respectées dans 27 % des plantations, la pire performance (70 % d' échec) se retrouvant dans les forêts de pruche-cèdre. La régénération naturelle était fréquente mais atteignait seulement la moitié du niveau du pin lodgepole. Les dégâts biotiques, notamment les rouilles du tronc des pins durs, ont été le facteur dominant de réduction des densités relatives permettant de déclarer les plantations comme étant établies. La densité relative était plus à risque d' être réduite dans le cas des peuplements où les précipitations au cours de l' été étaient élevées ou que le régime hydrique du sol était plus humide et lorsque les peuplements avaient été soumis à un brûlage contrôlé avant plantation ou à des traiteme...

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Section: Discussion Trends In Total Stand Densitymentioning

confidence: 99%

Decline of planted lodgepole pine in the southern interior of British Columbia

Mather¹,

Simard²,

Heineman³

et al. 2010

The Forestry Chronicle

View full text Add to dashboard Cite

show abstract

“…Although the forests of central BC appear to have been devastated by the mountain pine beetle, studies of residual stand structure in many locations revealed that this was not the case for unsalvaged stands, as abundant residual green trees, regenerating saplings and seedlings of currently acceptable commercial tree species remain in the stands [51][52][53][54][55]. The recruitment rate and species composition of new regeneration after MPB attack are variable across the landscape (different combinations of species and densities).…”

Section: Stand Structure and Compositionmentioning

confidence: 99%

“…The recruitment rate and species composition of new regeneration after MPB attack are variable across the landscape (different combinations of species and densities). Several recent studies reported successful recruitment with abundant regeneration beneath the tree layer after MPB attack [40,[53][54][55][56][57][58] while others reported a slow recruitment process with substantially lower regeneration density [1,21,59]. However, Amoroso et al [55] concluded that ingress of natural regeneration was slow in the first few years after MPB attack but there was a strong pulse of recruitment 10-20 years post disturbance.…”

Section: Stand Structure and Compositionmentioning

confidence: 99%

Aftermath of Mountain Pine Beetle Outbreak in British Columbia: Stand Dynamics, Management Response and Ecosystem Resilience

Dhar

Parrott

Hawkins

2016

Forests

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Abstract:The mountain pine beetle (Dendroctonus ponderosae Hopkins) (MPB) has infested and killed millions of hectares of lodgepole pine (Pinus contorta var. latifolia Engelm) forests in British Columbia, Canada, over the past decade. It is now spreading out of its native range into the Canadian boreal forest, with unknown social, economic and ecological consequences. This review explores the ramifications of the MPB epidemic with respect to mid-term timber supply, forest growth, structure and composition, vegetation diversity, forest fire, climate change, and ecosystem resilience. Research confirms that, in British Columbia, all of these variables are more significantly impacted when salvage logging is used as management response to the outbreak. We conclude that appropriate management in response to MPB is essential to ensuring ecologically resilient future forests and reliable mid-term timber supplies for affected human communities. We highlight knowledge gaps and avenues for research to advance our understanding in support of sustainable post-disturbance forest management policies in British Columbia and elsewhere.

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“…My analysis does not take into account germ inants (<10 cm tall) or existing trees (>7.5 dbh), even though both could be considered important elements of advance regeneration. Germinants are not infrequent in the understories of the 32 more moist zones of the SBS (Vyse et al, 2009). I also m ake the assum ption that all pine trees >7.5 can dbh within the plot will not survive post MPB, and therefore are not considered in the stocking calculation.…”

Section: Post-field Data O Rganizationmentioning

confidence: 99%

“…I selected a threshold of 600 stems/ha to separate stocked from not stocked stands as several studies referring the percentage of plots meeting or exceeding minimal stocking standards have used 600 stems/ha as the baseline (Bulmer et al, 2002;Burton, 2006;Vyse et. al., 2009).…”

Section: Post-field Data O Rganizationmentioning

confidence: 99%

Modelling the distribution of advance regeneration in lodgepole pine stands in the Central Interior of British Columbia.

Brooks¹

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Regeneration beneath lodgepole pine dominated stands attacked or threatened by the mountain pine beetle in the south central Interior, British Columbia

Cited by 35 publications

References 3 publications

Decline of planted lodgepole pine in the southern interior of British Columbia

Decline of planted lodgepole pine in the southern interior of British Columbia

Aftermath of Mountain Pine Beetle Outbreak in British Columbia: Stand Dynamics, Management Response and Ecosystem Resilience

Modelling the distribution of advance regeneration in lodgepole pine stands in the Central Interior of British Columbia.

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