# Wangui et al. 2026: Biomass and carbon estimation for three browsable native shrubs in New Zealand

Wangui, J. C., Pain, S. J., Kenyon, P. R., Tozer, P. R., & Millner, J. P. (2026). Biomass and carbon estimation for three browsable native shrubs in New Zealand. New Zealand Journal of Forestry Science, 56, 16.

- DOI: https://doi.org/10.33494/nzjfs562026x567x
- Access: open access
- Copy we read: https://nzjforestryscience.nz/index.php/nzjfs/article/download/567/153
- Status: no retraction or correction notice recorded (Crossref is asked weekly); last checked 2026-11-02
- Page: https://treeallometry.org/sources/wangui-2026/

## Equations from this source (6)

### Coprosma robusta (all sites): AGB from D and H (Table 7)

Aboveground biomass for Coprosma robusta, New Zealand. Inputs: Root collar diameter + Height. 18 trees.

As printed (Table 7):

> C. robusta All sites ln(AGB) =ln(a)+b×ln(D)+c×ln(H) -3.02**** 1.79**** 0.41** … CF 1.05

Page: https://treeallometry.org/equations/wangui-2026-agb-coprosma-robusta-d-h/

### Coprosma robusta (Massey University): AGB from D and H (Table 7)

Aboveground biomass for Coprosma robusta, New Zealand. Inputs: Root collar diameter + Height. 6 trees.

As printed (Table 7):

> C. robusta Massey University ln(AGB) =ln (a)+b×ln(D)+c×ln(H) -3.53** 2.16** 0.27 ns … CF 1.02

Page: https://treeallometry.org/equations/wangui-2026-agb-coprosma-robusta-massey-d-h/

### Melicytus ramiflorus (Limestone Downs): AGB from D (Table 7)

Aboveground biomass for Melicytus ramiflorus, New Zealand. Inputs: Root collar diameter. 9 trees.

As printed (Table 7):

> M. ramiflorus Limestone Downs ln(AGB) =ln (a)+b×ln(D) -2.80**** 1.74**** … CF 1.17

Page: https://treeallometry.org/equations/wangui-2026-agb-melicytus-ramiflorus-ld-d/

### Native shrubs NZ (3 spp, all sites): AGB from D (Table 7)

Aboveground biomass for Coprosma robusta, Pittosporum crassifolium and Melicytus ramiflorus (generalized), New Zealand. Inputs: Root collar diameter. 54 trees.

As printed (Table 7):

> Generalized- All sites ln(AGB) =ln (a)+b×ln(D) -3.69**** 2.45**** … CF 1.07

Page: https://treeallometry.org/equations/wangui-2026-agb-gen-all-d/

### Native shrubs NZ (3 spp, Massey University): AGB from D and H (Table 7)

Aboveground biomass for Coprosma robusta, Pittosporum crassifolium and Melicytus ramiflorus (generalized), New Zealand. Inputs: Root collar diameter + Height. 19 trees.

As printed (Table 7):

> Generalized- Massey University ln(AGB) =ln (a)+b×ln(D)+c×ln(H) -3.57**** 2.18**** 0.40** … CF 1.05

Page: https://treeallometry.org/equations/wangui-2026-agb-gen-massey-d-h/

### Pittosporum crassifolium (Massey University): AGB from D and H (Table 7)

Aboveground biomass for Pittosporum crassifolium, New Zealand. Inputs: Root collar diameter + Height. 5 trees.

As printed (Table 7):

> P. crassifolium Massey University ln(AGB) =ln (a)+b×ln(D)+c×ln(H) -3.65*** 3.93** -2.40* … CF 1.00

Page: https://treeallometry.org/equations/wangui-2026-agb-pittosporum-crassifolium-massey-d-h/