Yield prediction models and comparative growth rates for six eucalypt species

West, Philip W.; Mattay, J. P.

doi:10.1080/00049158.1993.10674609

Cited by 51 publications

(20 citation statements)

References 2 publications

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“…7; Appendix C: Table C1) to assess the relative differences. Eq.1 predicted carbon stocks similar to, or higher than, stocks predicted by other equations reported for E. regnans (e.g., Borough et al 1984, Grierson et al 1992, West and Mattay 1996, Dean et al 2003, DCCEE 2010. The higher predictions from Eq.1 were mainly due to site data for old growth forests being included in the derivation of our equation, whereas the site data for most other equations were derived from forests of less than 100 years old.…”

Section: Change In Carbon Stock Of Living Biomass Over Timementioning

confidence: 73%

“…1; 2, Eq. 2; 3, Grierson et al (1992); 4, West and Mattay (1996);5, Borough et al (1984); 6, FullCAM DCCEE (2010); 7, Dean et al (2003) and Dean and Roxburgh (2006);8, Watson and Vertessy (1996);9, Roxburgh et al (2010). Abbreviations are: LB, living biomass; AGB, aboveground biomass; A, age; S, stocking, trees/ha; H, tree height; V p , stem volume per plot; V t , stem volume per tree; DBH, diameter at breast height of 1.3 m; SI, site index; exp, exponential; ln, natural logarithm.…”

Section: Appendix C Carbon Accumulation Over Timementioning

confidence: 99%

“…3 West and Mattay [1996], value used in Borough et al [1984], average value calculated for the young regrowth carbon sites in the current study).…”

Section: Appendix C Carbon Accumulation Over Timementioning

confidence: 99%

“…Polynomial equation from Grierson et al (1992) (solid grey line) and the extrapolation using an exponential model for Eq.2 (dashed grey line). Equations from the literature include West and Mattay (1996), Borough et al (1984); FullCAM in DCCEE (2010); ; Dean et al (2003) and Dean and Roxburgh (2006). Equations for aboveground living biomass were converted to total living biomass using a standard expansion factor of 1.25 (Snowdon et al 2000).…”

Section: Change In Carbon Stock Of Living Biomass Over Timementioning

confidence: 99%

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Managing temperate forests for carbon storage: impacts of logging versus forest protection on carbon stocks

Keith¹,

Lindenmayer²,

Mackey³

et al. 2014

Ecosphere

130

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Abstract. Management of native forests offers opportunities to store more carbon in the land sector through two main activities. Emissions to the atmosphere can be avoided by ceasing logging. Removals of carbon dioxide from the atmosphere can be increased by allowing forests to continue growing. However, the relative benefits for carbon storage of managing native forests for wood production versus protection are contested. Additionally, the potential for carbon storage is impacted upon by disturbance events, such as wildfire, that alter the amount and longevity of carbon stocks.Using a case study of montane ash forests in southeastern Australia, we demonstrated that the total biomass carbon stock in logged forest was 55% of the stock in old growth forest. Total biomass included above-and belowground, living and dead. Biomass carbon stock was calculated spatially as an average across the landscape, accounting for variation in environmental conditions and forest age distribution. Reduction in carbon stock in logged forest was due to 66% of the initial biomass being made into products with short lifetimes (,3 years), and to the lower average age of logged forest (,50 years compared with .100 years in old growth forest). Only 4% of the initial carbon stock in the native forest was converted to sawn timber products with lifetimes of 30-90 years.Carbon stocks are depleted in a harvested forest system compared with an old growth forest, even when storage in wood products and landfill are included. We estimated that continued logging under current plans represented a loss of 5.56 Tg C over 5 years in the area logged (824 km 2 ), compared with a potential gain of 5.18-6.05 TgC over 5 years by allowing continued growth across the montane ash forest region (2326 km 2 ). Avoiding emissions by not logging native forests and allowing them to continue growing is therefore an important form of carbon sequestration. The mitigation value of forest management options of protection versus logging should be assessed in terms of the amount, longevity and resilience of the carbon stored in the forest, rather than the annual rate of carbon uptake.

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Section: Change In Carbon Stock Of Living Biomass Over Timementioning

confidence: 73%

Section: Appendix C Carbon Accumulation Over Timementioning

confidence: 99%

“…3 West and Mattay [1996], value used in Borough et al [1984], average value calculated for the young regrowth carbon sites in the current study).…”

Section: Appendix C Carbon Accumulation Over Timementioning

confidence: 99%

Section: Change In Carbon Stock Of Living Biomass Over Timementioning

confidence: 99%

See 2 more Smart Citations

Managing temperate forests for carbon storage: impacts of logging versus forest protection on carbon stocks

Keith¹,

Lindenmayer²,

Mackey³

et al. 2014

Ecosphere

130

View full text Add to dashboard Cite

show abstract

“…Table 1 was intended to demonstrate that the three equations behave reasonably, even when extrapolated to extreme situations, and when exposed to optimization routines able to reveal imperfections in models. Figure 5 offers a further demonstration of utility by comparing West and Mattay's (1993) model ln(V)=b 1 +b 2 /t+b 3 S (where t is age in years and S is site index) fitted to the same data using a traditional statistical approach with the equivalent prediction prepared using equations 1-3, calibrated to the mean values observed in the present analysis (Table 2). Parameters β 1 and β 2 are simple averages observed in the data; G max and the small end diameter d are arbitrary estimates based on visual inspection of the data, and the initial stocking N 0 was estimated by least squares to provide a good fit.…”

Section: Testing the Equationsmentioning

confidence: 99%

Robust relationships for simple plantation growth models based on sparse data

Vanclay

2010

Forest Ecology and Management

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How do management alternatives of fast‐growing forests affect water quantity and quality in southeastern Brazil? Insights from a paired catchment experiment

Ferraz

Rodrigues

Garcia

et al. 2021

Hydrological Processes

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Fast-growing forest plantations have been expanding in Brazil in the last 50 years, which reach productivities by over 40 m 3 ha À1 year À1 in reduced rotation between 5 and 15 years. In the 1990s, environmental warnings about these plantations guided research projects seeking to understand their effects on water and propose forest management actions to minimize them. The assessment of forest management

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Yield prediction models and comparative growth rates for six eucalypt species

Cited by 51 publications

References 2 publications

Managing temperate forests for carbon storage: impacts of logging versus forest protection on carbon stocks

Managing temperate forests for carbon storage: impacts of logging versus forest protection on carbon stocks

Robust relationships for simple plantation growth models based on sparse data

How do management alternatives of fast‐growing forests affect water quantity and quality in southeastern Brazil? Insights from a paired catchment experiment

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