Giant sequoia (Sequoiadendron giganteum (Lindl.) Buchholz) in Europe

Knigge, Wolfgang

doi:10.1007/bf02628270

Cited by 7 publications

(9 citation statements)

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“…Because of its rapid growth, decay resistance, great longevity, incomparable size, and resistance to fire, giant sequoia (Sequoiadendron giganteum) has exceptional potential to provide economic and ecological assets well beyond its native range (Knigge 1992, Stewart et al 1994, Peracca and O'Hara 2008, Kitzmiller and Lunak 2012.…”

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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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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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“…The heartwood of this species developed continuously throughout the year (Baqui & Shah 1985). This kind of variations in heartwood proportion has been commonly found in tree species (Eberhard 1990) and is highly genetically controlled (Korinobu et al 1990;Knigge 1993;Zobel & Jett 1995). Therefore, it becomes an effective character for selection to screen individuals with best heartwood proportion to approach satisfying gain in timber quality.…”

Section: Resultsmentioning

confidence: 97%

Quality of Genetically-Improved Acacia auriculiformis For Renewable Short-Rotation Wood-Energy

Hendrati¹,

Nurrohmah²

2018

jtfm

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To be viable, fast-growing energy plantations must be large in volume, harvested at early age, and maximized calorific value which linked to heartwood proportion. This study examines 38 families in the second generation (F ) 2 progeny trial of Acacia auriculiformis for energy. Heartwood proportion, calorific value and lignin content were assessed at ages 22, 30, 35, and 40 months. Wood samples from around 300 selected individuals of observed ages from all families were examined. Quality was based on heartwood and sapwood development until reaching the -1 commercial requirement of >33% for lignin content and >4,500 cal g for calorific value. When required quality has been obtained at particular age, assessment of biomass was carried out from all final individuals in the progeny test. Heartwood proportion varies among families. Heartwood possesses higher values than sapwood in lignin content and calorific value. Individuals with higher heartwood proportion are preferred. Both wood types only reached the required quality for solid wood energy after 3.5 years, however lignin content at much early age are appropriate for wood pellet and briquette. Selection improves heartwood proportion and quality from the first 3 -1 -1 generation (F ) into F with an increase of 52% at three years. Mean annual increments at 3.5 years is 43 m ha yr . 1 2

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“…Giant sequoia groves within the study area have warm, dry summers and cool, wet winters; most of the precipitation falls in the form of snow in the winter between October and April (Weatherspoon, 1990; Knigge, 1994; Meyer and Safford, 2011). Based on 14 yr of precipitation data (2001–2014), the mean annual precipitation was 96 cm at Grant Grove, 68 cm at Wolverton, and 58 cm at Johnsondale meteorological stations, located at the northern, middle, and southern parts of the sequoia study region (Fig.…”

Section: Methodsmentioning

confidence: 99%

Moisture Stress Indicators in Giant Sequoia Groves in the Southern Sierra Nevada of California, USA

Ray

2016

Vadose Zone Journal

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Giant sequoia [Sequoiadendron giganteum (Lindl.) J. Buchholz] trees and their ecosystems are unique natural treasures in the Sierra Nevada, California, where most groves are federally managed for biodiversity, perpetuation of the species, and aesthetic, recreational, ecological, and scientific values. Increasing temperatures during the next several decades may create conditions unfavorable for these giant sequoias. Therefore, it is necessary to develop effective management systems to preserve the health of these giant sequoia groves. This study used a topographic wetness index (TWI) as the indicator of soil moisture conditions to evaluate the vulnerability of giant sequoia groves to soil moisture stress and focused on evaluating TWI distributions among all 70 sequoia groves to assess their vulnerability to soil moisture stress. The TWI values were derived using a 10-m digital elevation model and compared with soil, geology, slope, aspect, and elevation at the sequoia groves to understand the vulnerability of the groves to soil moisture stress. The TWI values were also compared with snow cover persistence derived from 12 yr of MODIS snow cover products. In addition, satellite soil moisture products were used to compare the dry and wet periods predicted by snow cover persistence. Results showed that the groves located at higher elevation are less vulnerable unless the TWI across the groves is low. For the large number of groves with elevations mainly in the 1800-to 2100-m range, the TWI distributions can serve as a first-order indicator of relative vulnerability. Further, this analysis showed that areas with milder slopes and more converging area (higher TWI), plus longer snow cover persistence, should be less susceptible to low summer soil moisture than areas having steeper slopes, more diverging topography (lower TWI), and earlier snowmelt. This analysis can be used to highlight groves that are potentially more vulnerable, particularly when considering TWI, snow cover persistence, and satellite soil moisture together.

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Giant sequoia (Sequoiadendron giganteum (Lindl.) Buchholz) in Europe

Cited by 7 publications

References 1 publication

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

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

Quality of Genetically-Improved Acacia auriculiformis For Renewable Short-Rotation Wood-Energy

Moisture Stress Indicators in Giant Sequoia Groves in the Southern Sierra Nevada of California, USA

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