# Cistus albidus total aboveground fuel (biomass) from basal diameter, all development states

Aboveground biomass equation for Cistus albidus, Spain, from Deltell et al. 2024. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Deltell et al. 2024 (Table 2 caption):

> Y=((exp(a))×(X^b))×CF

Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#equation

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

```
Aboveground biomass = exp(3.917) * DRC^2.35 * 1.053 / 1000
```

Inputs: DRC = Root collar / stem base diameter (cm).
The source's own form: exp(3.917) * X^2.35 * 1.053, with X in cm; output in g.
Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#canonical

## What it covers

- Output: Aboveground biomass, kg
- Taxon: Cistus albidus (species), family Cistaceae; shrub
- Where: Ayora, Valencia Province, eastern Spain (post-fire stands 5-26 years old). Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#where
- Biomes: temperate, dryland
- Stand: natural
- R²: 0.923. Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#r2
- Correction factor: 1.053 (applied). Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#cf
- Method: log-log regression with Sprugel (1983) correction factor. Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#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

Deltell, L., Santana, V.M., Baeza, M.J. (2024). Allometric equations to calculate living and dead fuel loads in Mediterranean species. European Journal of Forest Research, 143, 739-749.

- DOI: https://doi.org/10.1007/s10342-023-01652-y
- Access: open access
- Copy we read: https://link.springer.com/article/10.1007/s10342-023-01652-y
- Every equation from this source: https://treeallometry.org/sources/deltell-2024/
- Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#source

## The facts, in the source's words

**Equation** (Table 2 caption):

> Y=((exp(a))×(X^b))×CF

Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#equation

**Equation** (Table 2 (columns: species, dependent variable Y, independent variable X, a, b, r2, SEE, CF)):

> C. albidus | Total fuel | Diameter | 3.917 | 2.350 | 0.923 | 0.320 | 1.053

Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#quote-expression

**Units** (Methods, Sampling of species-specific structural variables (measurements in cm)):

> we measured four structural variables ... basal stem diameter, height, maximum crown diameter

Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#quote-published-units

**published.output unit** (Methods, Sampling of species-specific structural variables):

> The weight of fuel fractions was measured in grams.

Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#quote-published-output-unit

**Our note:** Total fuel here is all plant biomass of the individual (living plus dead, all size classes), pooled over four post-fire development states (5, 9, 14 and 26 years). X is basal stem diameter in cm (the paper says measured in cm; Table 2 does not repeat the unit) and Y is in grams. Individuals sampled are 10-12 per species per state; per-species n and diameter range are not stated, so left out. Equation is a species-level shrub or small-tree fuel model. The paper writes the fit as 'log Y = log a + b log X' without naming the base, but prints the back-transform as Y = exp(a) × X^b × CF (Table 2 caption), so a is taken as a natural-log intercept as the paper itself does.

## 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 |
| --- | --- | --- | --- |
| DRC = 10 | 11.8 | 11.8 | Computed from the printed form: hand-computed from the published form |

Cite: https://treeallometry.org/equations/deltell-2024-c-albidus-total/#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: Deltell, L., Santana, V.M., Baeza, M.J. (2024). Allometric equations to calculate living and dead fuel loads in Mediterranean species. European Journal of Forest Research, 143, 739-749. https://doi.org/10.1007/s10342-023-01652-y

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Cistus albidus total aboveground fuel (biomass) from basal diameter, all development states", checked 2026-11-02, https://treeallometry.org/equations/deltell-2024-c-albidus-total/. 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/deltell-2024-c-albidus-total.json
Report a problem: email info@restorationscope.com with the equation id (deltell-2024-c-albidus-total) and where the right value appears.