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Development of a Hybrid Modeling Framework for Intensively Managed Douglas-Fir Plantations in the Pacific Northwest.
, 2006
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"... Calibration and validation of a simplified process-based model for the prediction of the carbon balance of Scottish Sitka spruce (Picea sitchensis) plantations FrancescoMinunno,Georgios Xenakis,Michael P. Perks, andMaurizioMencuccini Abstract: There is increasing recognition that forestry provides a ..."
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Calibration and validation of a simplified process-based model for the prediction of the carbon balance of Scottish Sitka spruce (Picea sitchensis) plantations FrancescoMinunno,Georgios Xenakis,Michael P. Perks, andMaurizioMencuccini Abstract: There is increasing recognition that forestry provides a low cost and robust means of climate change abatement through carbon sequestration and substitution. However, current understanding of forest ecosystem carbon exchange and forest–atmosphere interactions are often inadequately characterized by existing empirical growth models with resulting poor representation for regional extrapolations. In this paper, we describe the parameterisation and independent validation, against both eddy covariance and forest growth experimental data, of a process-oriented model 3PGN to provide assess-ments of carbon sequestration of Sitka spruce (Picea sitchensis (Bong.) Carrière) plantations across Scotland. In compari-son with eddy covariance measurements, the model predicted all of the major annual carbon fluxes, i.e., gross primary
E. camaldulensis Optimal Planting Density in Desert Western Australia in View of Its Photosynthetic Properties
"... Abstract: The growth rate of Eucalyptus camaldulensis at an irrigated plantation in a semi-arid area was same as at a non-irrigated plantation near the seashore (450 mmy -1 precip.). The Leaf Area Index (LAI) and planting density at the former site (0.48, 207 trees ha -1 ) were less than at the lat ..."
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Abstract: The growth rate of Eucalyptus camaldulensis at an irrigated plantation in a semi-arid area was same as at a non-irrigated plantation near the seashore (450 mmy -1 precip.). The Leaf Area Index (LAI) and planting density at the former site (0.48, 207 trees ha -1 ) were less than at the latter site (0.98, 1667 trees ha -1 ). We surveyed the photosynthetic properties of E. camaldulensis at each site in the summer (dry) and winter (wet) seasons. The leaves were found to have a higher Vcmax than the leaves of other tree species, and Vc max did not differ between the sites and seasons. J max for E. camaldulensis was near the median for investigated tree species. The response of stomatal conductance to soil water potential did not differ between the sites. These findings suggest that E. camaldulensis is highly light-demanding, which means that self-shading of leaves greatly reduces photosynthetic efficiency in the shaded leaves. We conclude that the planting density under semi-arid conditions should be low, to keep the LAI from exceeding 1. The estimated maximum stem and branch biomass production is estimated to be about 3~5 Mg ha -1 y -1 .
RESEARCH ARTICLE Plasticity of primary and s y
"... Full list of author information is available at the end of the articleBackground Production of wood biomass is a mandatory trait in any forest tree breeding program regardless of the final use be it pulp and paper, energy, construction or engineered wood products. Understanding the contribution of g ..."
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Full list of author information is available at the end of the articleBackground Production of wood biomass is a mandatory trait in any forest tree breeding program regardless of the final use be it pulp and paper, energy, construction or engineered wood products. Understanding the contribution of gen-etic and environmental factors as well as their inter-action in tree growth and adaptation is a prerequisite for accelerating tree domestication to meet the increasing demand for wood [1]. In this context, fast growing trees such as Eucalyptus will play a major role, not only as wood supply, but also as a model system to decipher the determinism of growth. Indeed, eucalypts are cultivated worldwide on more than twenty million hectares and are the most planted hardwoods in the world [2]. This genus comprises about 700 species [3] distributed naturally
The Potential for Forestry to Reduce
"... Forestry may have an important role to play in attempts to reduce atmospheric CO2 levels, since countries may choose to account for forest management activities to fulfil their commitments under the Kyoto Protocol. However, the effectiveness of such efforts may depend on the forest management strate ..."
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Forestry may have an important role to play in attempts to reduce atmospheric CO2 levels, since countries may choose to account for forest management activities to fulfil their commitments under the Kyoto Protocol. However, the effectiveness of such efforts may depend on the forest management strategies applied. This thesis is based on four separate studies in which the potential for forest management strategies to decrease net CO2 emissions was considered. Long-term field experiments and models were used to: evaluate the impact of different thinning regimes; study broadleaved stands growing on abandoned farmland with different rotation lengths; predict the effects of using different rotation lengths on carbon accumulation and fossil fuel substitution; and perform an integrated analysis of forest management practices and the potential to substitute fossil fuels by wood products. To evaluate the effects of the management regimes considered, carbon stocks in the investigated stands and the potential of the resulting biomass to substitute fossil fuel were estimated. No significant differences were found in biomass production between the thinning regimes for Norway spruce (Picea abies (L.) Karst.) stands, but the standing biomass was
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"... Effects of native vegetation on invasion success of Chinese tallow in a floating marsh ecosystem ..."
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Effects of native vegetation on invasion success of Chinese tallow in a floating marsh ecosystem
