carbon pools in a eucalyptus pilularis (blackbutt) regrowth forest managed for production or...
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![Page 1: Carbon Pools in a Eucalyptus pilularis (Blackbutt) Regrowth Forest Managed for Production or Conservation Daniel St Merryn Payne Australian National University](https://reader030.vdocuments.us/reader030/viewer/2022032709/56649eb45503460f94bbce89/html5/thumbnails/1.jpg)
Carbon Pools in a Eucalyptus pilularis (Blackbutt) Regrowth Forest Managed for Production
or Conservation
Daniel St Merryn Payne
Australian National University
Canberra, Australia
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Rationale• Kyoto Protocol Article 3.4
– Native forest management (harvesting, fire)
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Objectives
• Assess and measure the carbon pools in a forest ecosystem
• Predict the effect of different management regimes on the carbon pools
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Study Area
• Ourimbah State Forest (SFNSW)• Blackbutt dominant overstorey• 2 Ha Plot, 1 Ha harvested
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Data collection• Overstorey: Forest inventory
– DBH, height, stem quality
Basal Area
Blackbutt Dead Forest Oak Turpentine Other
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Data Collection cont.• Overstorey: destructive sampling
– 10 Blackbutts
• Allometric equation development
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Data collection cont.• Understorey: stratified by understorey type
– 12 2m * 2m plots
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Data Collection cont.• Litter and dead material
– Same 2m*2m plot
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Data Collection cont.• Timber Products measured at harvest
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Data Collection cont.
• Post harvest assessment– Forest inventory– Visual assessment of understorey
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Results:Actual carbon pools Pre and Post Harvest Carbon Storage
0
20
40
60
80
100
120
140
160
Understorey Litter Deadwood Products Slash Overstorey
Carbon Pool
Carb
on (
T/h
a)
Pre-Harvest Post-Harvest
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Modelling management options CAMFor
• 2 hypothetical management regimes– Production management
• Harvesting, fire
– Conservation management• Fire
• Inputs from actual carbon pool assessment and literature search
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CAMFor
Carbon stored in trees, debris and products pool
Species parametersGrowth, carbon content,Decomposition rates
Harvest regimeIntensity and frequency
Fire regimeIntensity and frequency
Initial ConditionsOverstorey biomass, litter
CAMForVersion 2.1
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Optimal Regimes
• Production option (50 years):– harvest 2000 and every 10 years– Low intensity fire in 2002 and every 2 years
after harvest
• Conservation option (50 years):– Low intensity fire in 2002 and every 10 years
after
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ResultsComparison of Production and Conservation Options
0
50
100
150
200
250
300
350
400
450
2000 2005 2010 2015 2020 2025 2030 2035 2040 2045 2050
Year
Carb
on (
T/h
a)
Production Conservation
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Results cont.Carbon Stored in Overstorey
0
50
100
150
200
250
300
350
400
450
2000 2005 2010 2015 2020 2025 2030 2035 2040 2045 2050
Year
Carb
on (
T/h
a)
Production Products Conservation
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First Kyoto Period
0
50
100
150
200
250
300
350
2008 2009 2010 2011 2012
Year
Carb
on (
T/h
a)
Production (tree + products) Carbon in Trees
Results cont.
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Carbon stored in trees after a wildfire
0
50
100
150
200
250
300
350
400
2000 2005 2010 2015 2020 2025 2030 2035 2040 2045 2050
Year
Carb
on (
T/h
a)
Production Conservation Products
Results cont.
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Modelling conclusions
• Overstorey important carbon storage pool– Production versus Conservation
• Type of timber products– Decay rate
• Effect of wildfire
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Summary
• Cost and time constraints for data collection– Refine data collection methods– Allometric equations
• Soil pool not measured
• Debris post-harvest: product?