Stand structure and growth of Abies magnifica responded to five thinning levels in northeastern California, USA

Zhang, Jianwei; Oliver, William W.

doi:10.1016/j.foreco.2005.11.007

Cited by 13 publications

(6 citation statements)

References 10 publications

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“…6). Clearly, DBH frequencies were bell-shaped even for all plots including control, in contrast to the finding in young red fir (Zhang and Oliver, 2006). Data are not presented for two locations-treatments were unreplicated at Little Glass Mountain and only two periods were analyzed for the density treatments at LaTour.…”

Section: Stand Structurementioning

confidence: 84%

Effect of stand densities on stand dynamics in white fir (Abies concolor) forests in northeast California, USA

Zhang

Oliver

Ritchie

2007

Forest Ecology and Management

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Section: Stand Structurementioning

confidence: 84%

Effect of stand densities on stand dynamics in white fir (Abies concolor) forests in northeast California, USA

Zhang

Oliver

Ritchie

2007

Forest Ecology and Management

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“…Stand density management has long been recognized as one of the principal silvicultural interventions offering forest managers an opportunity to optimize growth and yield (Zeide, 2004;Pretzsch, 2005), regulate tree size distributions (Landsberg et al, 2005;Zhang & Oliver, 2006), or improve the quality of forest products (Macdonald & Hubert, 2002). Knowledge of the stand densityÁgrowth relationships has direct implications for forest management decision-making since forest models for prediction of stand growth and thinning responses are based on the understanding of this relationship.…”

Section: Introductionmentioning

confidence: 99%

Density–growth relationships in thinned and unthinned Norway spruce and Scots pine stands in Norway

Gizachew

Brunner

2011

Scandinavian Journal of Forest Research

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Drawing on national forest inventory data representing a wide range of stand densities, site qualities, ages, and management practices in Norway, this study (1) analyzed the stand densityÁgrowth relationships in Norway spruce (Picea abies (L.) Karst.) and Scots pine (Pinus sylvestris L.) dominated stands and (2) evaluated the influence of site index, stand age, and thinning on the densityÁgrowth relationships. We developed nonlinear growth models that described the periodic annual basal area or volume increment as a function of initial basal area, site index, and stand age. The results showed that for both species, basal area growth increases with stand density although degressive at higher densities. Volume growth increases nearly linearly with stand density. Nevertheless, as demonstrated by the similar shapes of the growth curves, the pattern of the densityÁgrowth relationships did not vary considerably by site index classes, by stand ages, and between thinned and unthinned stands. Thinned stands grew about 10% more than unthinned stands of the same density, site index, and age. Our models showed a much stronger decrease of volume growth with decreasing density than previously published results from thinning experiments for the two species in Fennoscandia. The study also demonstrated the suitability of national forest inventory data for analyzing the densityÁgrowth relationship.

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“…In native groves, management objectives revolve around cohort establishment and canopy recruitment following regeneration failures related to fire suppression (York et al 2012). Controlled density experiments have provided both basic biological insight and guidance for designing management prescriptions for most commercial tree species, including all of those co-occurring with giant sequoia (e.g., Speechly and Helms 1985, O'Hara 1988, Cochran and Barrett 1999, Zhang and Oliver 2006). Because it is not widely managed as a commercial species, however, such insights for giant sequoia are limited despite the relevance for both commercial and restoration applications.…”

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confidence: 99%

Density Effects on Giant Sequoia (Sequoiadendron giganteum) Growth Through 22 Years: Implications for Restoration and Plantation Management

York¹,

O’Hara²,

Battles³

2013

Western Journal of Applied Forestry

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Giant sequoia were planted at various densities and tracked for 22 years to quantify the effect of growing space on diameter, height, stem volume, branch diameter, and branch density. Beginning after just 4 years and continuing through year 22, both stem diameter and height growth were highly sensitive to initial planting density (expressed in this case as horizontal growing space per tree) within the tested range of 3.7 to 28.4 m 2. Through 22 years, treatments allocating the greatest growing space per tree had greater volume per tree with no tradeoff yet observed in stand level volume growth. Branch diameter along the stem generally increased with growing space, but branch density did not change. To meet objectives, this study demonstrates that management strategies should be tailored to species' specific growth strategies. Giant sequoia is characterized by rapid early growth coupled with exceptionally low mortality, which has relevance in both native grove restoration as well as plantation management contexts. The measurements in this study suggest either planting at low density or thinning giant sequoia very early in dense stands if the objective is to increase individual tree growth rates without a corresponding reduction in stand volume. Young stands developing following high-severity fires may benefit from low-severity prescribed burns if objectives are to increase average stem growth or the rate of canopy recruitment.

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Stand structure and growth of Abies magnifica responded to five thinning levels in northeastern California, USA

Cited by 13 publications

References 10 publications

Effect of stand densities on stand dynamics in white fir (Abies concolor) forests in northeast California, USA

Effect of stand densities on stand dynamics in white fir (Abies concolor) forests in northeast California, USA

Density–growth relationships in thinned and unthinned Norway spruce and Scots pine stands in Norway

Density Effects on Giant Sequoia (Sequoiadendron giganteum) Growth Through 22 Years: Implications for Restoration and Plantation Management

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