Mountain pine beetle-caused tree mortality in partially cut plots surrounded by unmanaged stands

Schmid, J. M.; Mata, S. A.

doi:10.2737/rmrs-rp-54

Cited by 24 publications

(28 citation statements)

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“…2 /ha), respectively, and reported an average of 24.3 trees/ac (60.0 trees/ha) killed by MPB in unthinned stands compared to 9.6 trees/ac (23.7 trees/ha) in the thinned stands. Schmid et al (2005) suggested that the threshold for highly susceptible stands to MPB in the Black Hills may be around growing stock level 100 (approximate basal area of 100 ft 2 /ac), and all of our treated stands had a ponderosa pine basal area Ͻ76 ft 2 /ac. In Oregon, Sartwell and Dolph (1976) conducted a stand-level thinning study in ponderosa pine.…”

Section: Discussionmentioning

confidence: 99%

“…Blaine Cook (bcook@fs.fed.us), USDA Forest Service, Black Hills National Forest. Kenneth Marchand (kmarchand@fs.fed.us), USDA Forest Service, Black Hills National Forest. Stand-level studies in ponderosa pine have indicated reduced tree mortality levels in lower density stands (Sartwell and Stevens 1975, Negrón and Popp 2004, Schmid and Mata 2005, Negrón et al 2008a. Most of these studies, however, are retrospective in nature and based on quantifying tree mortality postoutbreak.…”

mentioning

confidence: 99%

“…This has led to the approach of minimizing tree mortality through silvicultural strategies aimed to reduce stand density (see Wood et al 1985 andFettig et al 2007 and references therein). Although available data support the use of stand density reduction through thinning in ponderosa pine, most research has been conducted in small plots or small stands, for example, less than 2.5 ac (1 ha), with little replication, or both Stevens 1982, Schmid andMata 2005). The efficacy of large-scale implementation remains untested, and data are needed to more effectively assess whether silvicultural treatments are effective for reducing bark beetle-caused tree mortality across large areas.…”

mentioning

confidence: 99%

“…Most of these studies, however, are retrospective in nature and based on quantifying tree mortality postoutbreak. The effectiveness of silvicultural treatments has been studied little because of the difficulty of implementation and costs, yet a few studies have shown reduced bark beetle-caused tree mortality in thinned ponderosa pine stands (Sartwell and Dolph 1976, Schmid and Mata 2005, Egan et al 2010, Graham et al 2016). This has led to the approach of minimizing tree mortality through silvicultural strategies aimed to reduce stand density (see Wood et al 1985 andFettig et al 2007 and references therein).…”

mentioning

confidence: 99%

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Large-Scale Thinnings, Ponderosa Pine, and Mountain Pine Beetle in the Black Hills, USA

Negrón¹,

Allen²,

Ambourn

et al. 2017

Forest Science

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Mountain pine beetle (Dendroctonus ponderosae Hopkins) (MPB), can cause extensive ponderosa pine (Pinus ponderosa Dougl. ex Laws.) mortality in the Black Hills of South Dakota and Wyoming, USA. Lower tree densities have been associated with reduced MPB-caused tree mortality, but few studies have reported on large-scale thinning and most data come from small plots that may not be representative of a large area. We quantified MPB-caused tree mortality in 21 pairs of commercially thinned and unthinned stands across the Black Hills. Both pre-and postoutbreak, unthinned stands had higher ponderosa pine basal area, tree density, and stand density index. Quadratic mean diameter was larger in thinned stands, both pre-and postoutbreak. Percent ponderosa pine basal area and tree density killed by MPB in unthinned stands were 38.2 Ϯ 7.0 and 34.4 Ϯ 6.9% compared with 3.9 Ϯ 3.2 and 3.6 Ϯ 2.9% in thinned stands, respectively. All stands were thinned within 2 years of exposure to MPB, suggesting a rapid effect from thinning treatments in mitigating tree mortality attributed to MPB. Stand density reductions through silviculture across a large geographical area can abate MPB-caused tree mortality.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Large-Scale Thinnings, Ponderosa Pine, and Mountain Pine Beetle in the Black Hills, USA

Negrón¹,

Allen²,

Ambourn

et al. 2017

Forest Science

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“…Ex Laws.) (McCambridge and Stevens 1982, Schmid and Mata 2005, Zhang et al 2013) stands relative to unthinned stands. While these studies reported results after a relatively short period of time following treatment (<10 years), to our knowledge, the long-term efficacy of diameter-limit cutting and other thinning types is undocumented.…”

Section: Introductionmentioning

confidence: 99%

Long-term efficacy of diameter-limit cutting to reduce mountain pine beetle-caused tree mortality in a lodgepole pine forest

Vandygriff¹,

Hansen²,

Bentz³

et al. 2015

The Forestry Chronicle

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Mountain pine beetle, Dendroctonus ponderosae Hopkins, is the most significant mortality agent in pine forests of western North America. Silvicultural treatments that reduce the number of susceptible host trees, alter age and size class distributions, and diversify species composition are considered viable, long-term options for reducing stand susceptibility to mountain pine beetle-caused tree mortality. Short-term efficacy of thinning treatments has been evaluated, but long-term efficacy has not. We evaluated mountain pine beetle-caused lodgepole pine mortality in 2008, ~28 years after diameterlimit cutting from above that removed the largest diameter lodgepole pines in a Wyoming, USA forest. Following extensive recent mountain pine beetle activity, the partially-cut stands had significantly less mountain pine beetle-caused tree mortality compared to untreated reference stands. These results are similar to observations five years post-treatment, albeit using different reference stands because the original controls were lost to timber harvest. The original management objective was reduced mountain pine beetle-caused tree mortality, and this objective was achieved, lasting for up to 28 years. Despite the reduced mortality among partially-cut stands, however, untreated and treated stands had similar densities of residual live mature lodgepole pine and those in untreated stands had larger average diameters.Key words: lodgepole pine, Dendroctonus ponderosae, silviculture, vegetation management, thinning RéSuméLe dendroctone du pin ponderosa, Dendroctonus ponderosae Hopkins, représente le plus important agent de mortalité des pinèdes de l' ouest de l' Amérique du Nord. Les traitements sylvicoles qui réduisent le nombre d'arbres susceptibles d' être atteints, qui modifient la distribution selon l'âge et les classes de diamètres et qui permettent la diversification de la composition des espèces, s'avèrent être des mesures viables à long terme pour réduire la susceptibilité des peuplements aux ravages causés par le dendroctone du pin. L' efficacité à court terme des traitements d' éclaircie a été évaluée, mais pas celle à long terme. Nous avons évalué la mortalité provoquée chez le pin ponderosa par le dendroctone du pin en 2008, environ 28 ans après une coupe à diamètre limite qui a retiré les pins de fort diamètre dans une forêt du Wyoming aux États-Unis. À la suite d'une recrudescence marquée de l'activité récente du dendroctone, les peuplements ayant été partiellement coupés ont affiché une mortalité associée au dendroctone significativement plus faible par rapport aux peuplements témoins. Ces résultats sont similaires aux observations faites cinq ans après traitement, malgré l'utilisation de peuplements de référence différents compte tenu que les témoins originaux avaient été récoltés. L' objectif original d'aménagement était de réduire la mortalité provoquée par le dendroctone du pin et il a été atteint, et ce au cours des 28 années écoulées. Toutefois, malgré cette mortalité réduite parmi les peuplements ...

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What is the Scope of “History” in Historical Ecology? Issues of Scale in Management and Conservation

Wiens

Safford

McGarigal

et al. 2012

Historical Environmental Variation in Conservation and Natural Resource Management

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Mountain pine beetle-caused tree mortality in partially cut plots surrounded by unmanaged stands

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Cited by 24 publications

References 1 publication

Large-Scale Thinnings, Ponderosa Pine, and Mountain Pine Beetle in the Black Hills, USA

Large-Scale Thinnings, Ponderosa Pine, and Mountain Pine Beetle in the Black Hills, USA

Long-term efficacy of diameter-limit cutting to reduce mountain pine beetle-caused tree mortality in a lodgepole pine forest

What is the Scope of “History” in Historical Ecology? Issues of Scale in Management and Conservation

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