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Redwood - spatial carbon by age and stocking

Description

Spatial estimates of stand carbon for coast redwood (Sequoia sempervirens) at three stockings (low, 400 stems/ha; medium, 650 stems/ha; and high, 900 stems/ha) and at three ages for the medium stocking (ages 30, 40 and 50).

Stand carbon includes carbon in the aboveground biomass, belowground biomass, dead wood and litter pools. Soil carbon is not included.

 

Date: June 2022 Version: v1

Owner: Scion

Contact: Michael Watt, Scion

 

Link to report / paper

Watt and Kimberley 2022 Spatial Comparisons of Carbon sequestration

 

Preview Image

 

Dataset attributes

Spatial extent National. Large lakes and a large plantation forest located in the central North Island were masked.
Spatial resolution Displayed resolution is 25m.
Temporal extent The Permanent Sample Plot data used represents stands planted from approximately 1976-2012, and growing conditions from ~1976-2020.
Temporal resolution Not applicable. (Total stand carbon at three potential rotation ages).
Evaluation method (Validation) None
Evaluation result (Numeric)
Evaluation result (Categorical)
Uncertainty method
Uncertainty data format (Numeric)
Uncertainty data format (Categorical)

 

Methodology

Productivity was determined using a stand level carbon prediction model that utilised geospatial surfaces of redwood productivity (300 Index, Site Index) to scale the predictions.

A description of the methods and results is given in Watt and Kimberley (2022a) and the displayed carbon surface is included in this paper as Figure 1b.

A more detailed description of the methods that includes a validation (but shows projections as elemental carbon rather than CO2 equivalents) is given in Watt and Kimberley (2022b).

 

Fitness for purpose / limitations

This table indicates whether the dataset is suitable for different types of questions at different scales.

Note: Users should carefully consider their purpose as this dataset may not be suitable.

Operational Absolute Relative Screening/scoping
Block/farm No No Maybe Yes
Multi-farms(5+) No No Maybe Yes
Catchment No No Yes Yes
National/regional No Maybe Yes Yes
Caveat(s) The presented surface is intended only as a guide for afforestation and growers should take into account the impact of microsite when choosing an appropriate species. These surfaces were derived from permanent sample plot data, which typically comprise plots of well managed trees, that do not have any unstocked areas and are sited away from exposed ridges. Consequently, we recommend that presented values of carbon are reduced by 15% when applied to standard forestry sites. Note that the dataset used to develop productivity and carbon surfaces for radiata pine is much more extensive than the data available for other species.

Data and Resources