# Fagus moesiaca stump dry biomass from diameter at 30 cm (Fig. 1)

Stem biomass equation for Fagus moesiaca, Greece, from Zianis & Mencuccini 2003. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

**Not fully checked:** Figure 1 supplies no SEE or correction factor and does not identify whether 0.1954 includes the log-back-transform correction discussed in Section 2.3. This record uses the printed curve; verify correction handling before treating its output as mean stump dry mass.

## Equation

As printed in Zianis & Mencuccini 2003 (Figure 1, p. 443 (rendered page)):

> M_SP = 0.1954 D_B^0.9788

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#equation

In this library's units, ready to compute (stem biomass in kg):

```
Stem biomass = 0.1954 * D30^0.9788
```

Inputs: D30 = Stem diameter at 30 cm (cm).
The source's own form: 0.1954 * DB^0.9788, with DB in cm; output in kg.
Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#canonical

## What it covers

- Output: Stem biomass, kg
- Taxon: Fagus moesiaca (species); broadleaf
- Where: Vermio Mountain, Northern Greece. Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#where
- Biomes: temperate
- Stand: natural
- R²: 0.7532. Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#r2
- Verification: read in the original source
- Last checked: 2026-11-05. Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#checked_at

A missing fit statistic is one the source doesn't state, or that we haven't recorded; it is never estimated. Outside the stated DBH range or region, the equation is an extrapolation.

## Source

Zianis, D., & Mencuccini, M. (2003). Aboveground biomass relationships for beech (Fagus moesiaca Cz.) trees in Vermio Mountain, Northern Greece, and generalised equations for Fagus sp. Annals of Forest Science, 60(5), 439–448.

- DOI: https://doi.org/10.1051/forest:2003036
- Peer review: A paper in a peer-reviewed journal.
- Access: open access
- Copy we read: https://hal.science/hal-00883716/document
- Every equation from this source: https://treeallometry.org/sources/zianis-2003/
- Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#source

## The facts, in the source's words

**Equation** (Figure 1, p. 443 (rendered page)):

> M_SP = 0.1954 D_B^0.9788

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#equation

**R²** (Figure 1, p. 443 (rendered page)):

> R² = 0.7532

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#quote-fit-r2

**Output** (Table III note, p. 442):

> MSP: stump mass

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#quote-output

**Output** (Section 2.2, p. 441):

> oven dried to constant weight

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#quote-output-2

**Units** (Table III note, p. 442):

> Biomass is expressed in kg, diameter in cm, and height in m.

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#quote-published-units

**Units** (Section 2.2, p. 441):

> the diameter at 0.30 m above ground (DB)

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#quote-published-units-2

**Taxon** (Abstract, p. 439):

> Fagus moesiaca Cz.

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#quote-taxon

**Where** (Abstract, p. 439):

> Vermio Mountains of Northern
Greece

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#quote-region

**Where** (Section 2.1, p. 440):

> the forest can be classified as temperate Mediterranean

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#quote-region-2

**stand** (Section 2.1, p. 440 (rendered page)):

> Naturally regenerated, pure beech

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#quote-stand

**Our note:** DB is diameter at 0.30 m above ground, mapped to D30. Stump mass only, not whole-stem biomass. The printed equation is used as shown; no additional correction can be calculated from the Figure 1 information.

## Checks this equation passes

On every build, the library's form and the source's own form (in its units) must both give these values within 1%.

| Inputs | Expected | We get | From |
| --- | --- | --- | --- |
| D30 = 20 | 3.67 | 3.67 | Computed from the printed form: Computed from the printed Figure 1 equation. |

Cite: https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/#checks

The calculator on the page shows carbon as biomass × 0.47 (IPCC 2006 Guidelines, Vol. 4, Ch. 4, Table 4.3) and CO₂e as carbon × 44/12.

## How to cite

Cite the source for the equation: Zianis, D., & Mencuccini, M. (2003). Aboveground biomass relationships for beech (Fagus moesiaca Cz.) trees in Vermio Mountain, Northern Greece, and generalised equations for Fagus sp. Annals of Forest Science, 60(5), 439–448. https://doi.org/10.1051/forest:2003036

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Fagus moesiaca stump dry biomass from diameter at 30 cm (Fig. 1)", checked 2026-11-05, https://treeallometry.org/equations/zianis-2003-fig1-msp-d30/. Data CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Quotes are the authors' words.

Data for this equation: https://treeallometry.org/data/equations/zianis-2003-fig1-msp-d30.json
Report a problem: email info@restorationscope.com with the equation id (zianis-2003-fig1-msp-d30) and where the right value appears.