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Biología y Ciencias de la Vida

Calculadora verificada con fórmula transparente

Biología y Ciencias de la Vida

Species-Area Relationship Calculator.

Estimates the number of species expected in a habitat of a given area using the power-law species-area relationship S = c * A^z.

Los resultados se actualizan en vivo mientras escribes.

Tus entradas

Habitat area

Constant c

Exponent z

Cómo funciona

1
Enter the area of the habitat in square kilometers.
2
Enter the constant c, which represents the number of species per unit area.
3
Enter the exponent z, which describes how species richness scales with area.
4
The calculator applies the formula S = c × A^z to estimate the number of species.

c * pow(area, z)

Preguntas frecuentes

What does the exponent z represent?

The exponent z is the slope of the species-area relationship on a log-log plot. It typically ranges from 0.15 to 0.35 for most habitats, with higher values indicating steeper increases in species with area.

What is the constant c?

The constant c is the number of species expected in one unit of area (e.g., 1 km²). It varies by taxonomic group and region.

Can this calculator be used for conservation planning?

Yes, it helps estimate species loss when habitat area is reduced, which is useful for reserve design and impact assessments.

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Resultados

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Expected species

39,811species

Pregunta lo que sea

Estimación solo como guía general: verifica decisiones importantes con un profesional adecuado.

Cómo funciona

Estimates the number of species expected in a habitat of a given area using the power-law species-area relationship S = c * A^z.

Enter the area of the habitat in square kilometers.
Enter the constant c, which represents the number of species per unit area.
Enter the exponent z, which describes how species richness scales with area.
The calculator applies the formula S = c × A^z to estimate the number of species.

Fórmulas

Las matemáticas detrás de esta calculadora, escritas para que puedas verificar el resultado.

Power-law species-area relationship

S = c × A^z

S is the number of species, A is the area, c is a constant, and z is the scaling exponent.

Example:

Input: A = 100 km², c = 10, z = 0.3

Calculation: 10 × 100^0.3 ≈ 10 × 3.98 = 39.8

Result: ≈ 40 species

Casos de uso reales

Dónde aparece este cálculo en la vida cotidiana.

Habitat fragmentation

Estimate how many species might be lost when a habitat is reduced in size.

Example: If a 100 km² forest is cut to 10 km², species drop from 40 to about 20.

Island biogeography

Predict species richness on islands of different sizes.

Example: Compare a 5 km² island to a 50 km² island.

Reserve design

Determine the area needed to support a target number of species.

Example: Find the area required for 100 species given c and z.

Consejos y errores comunes

Tips

Use typical z values: 0.15 for mainland, 0.25 for islands, 0.35 for isolated habitats.
Ensure area units are consistent (e.g., all in km²).
The relationship is a power law, so log-log plots are linear.
For small areas, the estimate may be less accurate due to sampling effects.

Common Mistakes to Avoid

Using z as a percentage instead of a decimal (e.g., 0.3 not 30).
Forgetting to convert area to the same units as c.
Assuming the relationship holds outside the range of observed data.

Supuestos y limitaciones

Use the stated inputs and units.
Results are estimates for planning and education.

Check measurements and source data before making an important decision.