# Marden et al. 2025: Total plant biomass, carbon stock, and species- and age-specific allometry for 12 of New Zealand's early-colonising indigenous shrub and tree species to 5 years of age

Marden, M., Mason, N. W. H., Lambie, S., & Rowan, D. (2025). Total plant biomass, carbon stock, and species- and age-specific allometry for 12 of New Zealand's early-colonising indigenous shrub and tree species to 5 years of age. New Zealand Journal of Forestry Science, 55, 3.

- DOI: https://doi.org/10.33494/nzjfs552025x387x
- Access: open access
- Copy we read: https://nzjforestryscience.nz/index.php/nzjfs/article/view/387/122
- Status: no retraction or correction notice recorded (Crossref is asked weekly); last checked 2026-11-02
- Page: https://treeallometry.org/sources/marden-2025/

## Equations from this source (48)

### Coprosma robusta, NZ, belowground biomass from RCD (Table 3)

Root biomass for Coprosma robusta, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Coprosma robusta):

> y = 85.7e0.0333x

Page: https://treeallometry.org/equations/marden-2025-coprosma-bgb/

### Coprosma robusta, NZ, height from RCD (Table 3)

Height for Coprosma robusta, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Coprosma robusta):

> y = 0.453ln(x)

Page: https://treeallometry.org/equations/marden-2025-coprosma-h/

### Coprosma robusta, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Coprosma robusta, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Coprosma robusta):

> y = 407e0.0298x

Page: https://treeallometry.org/equations/marden-2025-coprosma-agb/

### Coprosma robusta, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Coprosma robusta, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Coprosma robusta):

> y = 491e0.0306x

Page: https://treeallometry.org/equations/marden-2025-coprosma-total/

### Cordyline australis, NZ, belowground biomass from RCD (Table 3)

Root biomass for Cordyline australis, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Cordyline australis):

> y = 99.4e0.0253x

Page: https://treeallometry.org/equations/marden-2025-cordyline-bgb/

### Cordyline australis, NZ, height from RCD (Table 3)

Height for Cordyline australis, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Cordyline australis):

> y = 0.0247x

Page: https://treeallometry.org/equations/marden-2025-cordyline-h/

### Cordyline australis, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Cordyline australis, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Cordyline australis):

> y = 650e0.0212x

Page: https://treeallometry.org/equations/marden-2025-cordyline-agb/

### Cordyline australis, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Cordyline australis, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Cordyline australis):

> y = 750e0.0219x

Page: https://treeallometry.org/equations/marden-2025-cordyline-total/

### Coriaria arborea, NZ, belowground biomass from RCD (Table 3)

Root biomass for Coriaria arborea, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Coriaria arborea):

> y = 332e0.00615x

Page: https://treeallometry.org/equations/marden-2025-coriaria-bgb/

### Coriaria arborea, NZ, height from RCD (Table 3)

Height for Coriaria arborea, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Coriaria arborea):

> y = 0.38ln(x)

Page: https://treeallometry.org/equations/marden-2025-coriaria-h/

### Coriaria arborea, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Coriaria arborea, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Coriaria arborea):

> y = 29.4x

Page: https://treeallometry.org/equations/marden-2025-coriaria-agb/

### Coriaria arborea, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Coriaria arborea, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Coriaria arborea):

> y = 39.4x

Page: https://treeallometry.org/equations/marden-2025-coriaria-total/

### Hoheria populnea, NZ, belowground biomass from RCD (Table 3)

Root biomass for Hoheria populnea, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Hoheria populnea):

> y = 110e0.0333x

Page: https://treeallometry.org/equations/marden-2025-hoheria-bgb/

### Hoheria populnea, NZ, height from RCD (Table 3)

Height for Hoheria populnea, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Hoheria populnea):

> y = 0.0571x

Page: https://treeallometry.org/equations/marden-2025-hoheria-h/

### Hoheria populnea, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Hoheria populnea, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Hoheria populnea):

> y = 322e0.0348x

Page: https://treeallometry.org/equations/marden-2025-hoheria-agb/

### Hoheria populnea, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Hoheria populnea, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Hoheria populnea):

> y = 433e0.0344x

Page: https://treeallometry.org/equations/marden-2025-hoheria-total/

### Knightia excelsa, NZ, belowground biomass from RCD (Table 3)

Root biomass for Knightia excelsa, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Knightia excelsa):

> y = 21.3e0.05x

Page: https://treeallometry.org/equations/marden-2025-knightia-bgb/

### Knightia excelsa, NZ, height from RCD (Table 3)

Height for Knightia excelsa, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Knightia excelsa):

> y = 0.0513x

Page: https://treeallometry.org/equations/marden-2025-knightia-h/

### Knightia excelsa, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Knightia excelsa, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Knightia excelsa):

> y = 63.7e0.0526x

Page: https://treeallometry.org/equations/marden-2025-knightia-agb/

### Knightia excelsa, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Knightia excelsa, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Knightia excelsa):

> y = 84.9e0.052x

Page: https://treeallometry.org/equations/marden-2025-knightia-total/

### Leptospermum scoparium, NZ, belowground biomass from RCD (Table 3)

Root biomass for Leptospermum scoparium, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Leptospermum scoparium):

> y = 14.1e0.0852x

Page: https://treeallometry.org/equations/marden-2025-leptospermum-bgb/

### Leptospermum scoparium, NZ, height from RCD (Table 3)

Height for Leptospermum scoparium, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Leptospermum scoparium):

> y = 0.0762x

Page: https://treeallometry.org/equations/marden-2025-leptospermum-h/

### Leptospermum scoparium, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Leptospermum scoparium, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Leptospermum scoparium):

> y = 52.7e0.0871x

Page: https://treeallometry.org/equations/marden-2025-leptospermum-agb/

### Leptospermum scoparium, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Leptospermum scoparium, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Leptospermum scoparium):

> y = 66.7e0.0868x

Page: https://treeallometry.org/equations/marden-2025-leptospermum-total/

### Myrsine australis, NZ, belowground biomass from RCD (Table 3)

Root biomass for Myrsine australis, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Myrsine australis):

> y = 12.9e0.075x

Page: https://treeallometry.org/equations/marden-2025-myrsine-bgb/

### Myrsine australis, NZ, height from RCD (Table 3)

Height for Myrsine australis, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Myrsine australis):

> y = 0.348ln(x)

Page: https://treeallometry.org/equations/marden-2025-myrsine-h/

### Myrsine australis, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Myrsine australis, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Myrsine australis):

> y = 26e0.0823x

Page: https://treeallometry.org/equations/marden-2025-myrsine-agb/

### Myrsine australis, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Myrsine australis, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Myrsine australis):

> y = 38.8e0.0801x

Page: https://treeallometry.org/equations/marden-2025-myrsine-total/

### Pittosporum eugenoides, NZ, belowground biomass from RCD (Table 3)

Root biomass for Pittosporum eugenoides, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Pittosporum eugenoides):

> y = 53.9e0.0522x

Page: https://treeallometry.org/equations/marden-2025-piteug-bgb/

### Pittosporum eugenoides, NZ, height from RCD (Table 3)

Height for Pittosporum eugenoides, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Pittosporum eugenoides):

> y = 0.0499x

Page: https://treeallometry.org/equations/marden-2025-piteug-h/

### Pittosporum eugenoides, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Pittosporum eugenoides, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Pittosporum eugenoides):

> y = 221e0.0455x

Page: https://treeallometry.org/equations/marden-2025-piteug-agb/

### Pittosporum eugenoides, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Pittosporum eugenoides, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Pittosporum eugenoides):

> y = 274e0.0471x

Page: https://treeallometry.org/equations/marden-2025-piteug-total/

### Pittosporum tenuifolium, NZ, belowground biomass from RCD (Table 3)

Root biomass for Pittosporum tenuifolium, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Pittosporum tenuifolium):

> y = 29.8e0.0613x

Page: https://treeallometry.org/equations/marden-2025-pitten-bgb/

### Pittosporum tenuifolium, NZ, height from RCD (Table 3)

Height for Pittosporum tenuifolium, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Pittosporum tenuifolium):

> y = 0.05x

Page: https://treeallometry.org/equations/marden-2025-pitten-h/

### Pittosporum tenuifolium, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Pittosporum tenuifolium, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Pittosporum tenuifolium):

> y = 137e0.0546x

Page: https://treeallometry.org/equations/marden-2025-pitten-agb/

### Pittosporum tenuifolium, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Pittosporum tenuifolium, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Pittosporum tenuifolium):

> y = 167e0.056x

Page: https://treeallometry.org/equations/marden-2025-pitten-total/

### Plagianthus regius, NZ, belowground biomass from RCD (Table 3)

Root biomass for Plagianthus regius, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Plagianthus regius):

> y = 161e0.0256x

Page: https://treeallometry.org/equations/marden-2025-plagianthus-bgb/

### Plagianthus regius, NZ, height from RCD (Table 3)

Height for Plagianthus regius, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Plagianthus regius):

> y = 0.646ln(x)

Page: https://treeallometry.org/equations/marden-2025-plagianthus-h/

### Plagianthus regius, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Plagianthus regius, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Plagianthus regius):

> y = 551e0.0227x

Page: https://treeallometry.org/equations/marden-2025-plagianthus-agb/

### Plagianthus regius, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Plagianthus regius, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Plagianthus regius):

> y = 711e0.0235x

Page: https://treeallometry.org/equations/marden-2025-plagianthus-total/

### Pseudopanax arboreus, NZ, belowground biomass from RCD (Table 3)

Root biomass for Pseudopanax arboreus, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Pseudopanax arboreus):

> y = 41e0.0421x

Page: https://treeallometry.org/equations/marden-2025-pseudopanax-bgb/

### Pseudopanax arboreus, NZ, height from RCD (Table 3)

Height for Pseudopanax arboreus, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Pseudopanax arboreus):

> y = 0.0444x

Page: https://treeallometry.org/equations/marden-2025-pseudopanax-h/

### Pseudopanax arboreus, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Pseudopanax arboreus, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Pseudopanax arboreus):

> y = 103e0.047x

Page: https://treeallometry.org/equations/marden-2025-pseudopanax-agb/

### Pseudopanax arboreus, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Pseudopanax arboreus, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Pseudopanax arboreus):

> y = 144e0.0458x

Page: https://treeallometry.org/equations/marden-2025-pseudopanax-total/

### Sophora tetraptera, NZ, belowground biomass from RCD (Table 3)

Root biomass for Sophora tetraptera, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total below-ground biomass, Sophora tetraptera):

> y = 25.6e0.0572x

Page: https://treeallometry.org/equations/marden-2025-sophora-bgb/

### Sophora tetraptera, NZ, height from RCD (Table 3)

Height for Sophora tetraptera, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Height, Sophora tetraptera):

> y = 0.529ln(x)

Page: https://treeallometry.org/equations/marden-2025-sophora-h/

### Sophora tetraptera, NZ, total aboveground biomass from RCD (Table 3)

Aboveground biomass for Sophora tetraptera, New Zealand. Inputs: Root collar diameter.

As printed (Table 3, Total above-ground biomass, Sophora tetraptera):

> y = 127e0.0464x

Page: https://treeallometry.org/equations/marden-2025-sophora-agb/

### Sophora tetraptera, NZ, whole-plant biomass from RCD (Table 6)

Total biomass for Sophora tetraptera, New Zealand. Inputs: Root collar diameter.

As printed (Table 6, Total biomass, Sophora tetraptera):

> y = 154e0.0488x

Page: https://treeallometry.org/equations/marden-2025-sophora-total/