Update: A non-parametric method for the measurement of size diversity, with emphasis on data standardization. The measurement of the size evenness

Quintana, X.D. ; Egozcue, J.J. ; Martínez-Abella, O. ; López-Flores, R. (Universidad de Zaragoza) ; Gascón, S. ; Brucet, S. ; Boix, D.

Resumen: A method for the measurement of the size diversity based on the classical Shannon-Wiener expression was proposed as a proxy of the shape of the size distribution. The summatory of probabilities of a discrete variable (such as species relative abundances) in the original Shannon-Wiener expression was substituted by an integral of the probability density function of a continuous variable (such as body size). Here, we propose an update of this method by including the measurement of the size e-evenness, just dividing the exponential of the size diversity by its possible maximum for a given size range. Assuming a domain of the size range of (0, 8), for a given logarithmic mean ( mln) and a logarithmic standard deviation (sln), the distribution with the highest diversity is the Log-Normal. The size e-evenness ranges between 0 and 1 because of the division by the maximum exponential diversity. Size e-evenness is useful to discriminate whether variations in size diversity are due to changes in the shape of the size distribution or caused by differences in size dispersion.

Idioma: Inglés

DOI: 10.1002/lom3.10099

Año: 2016

Publicado en: LIMNOLOGY AND OCEANOGRAPHY-METHODS 14, 6 (2016), 408-413
ISSN: 1541-5856

Factor impacto JCR: 1.992 (2016)

Categ. JCR: LIMNOLOGY rank: 5 / 20 = 0.25 (2016) - Q1 - T1
Categ. JCR: OCEANOGRAPHY rank: 23 / 62 = 0.371 (2016) - Q2 - T2

Factor impacto SCIMAGO: 1.102 - Ocean Engineering (Q1)

Tipo y forma: Article (Published version)

Área (Departamento): Área Ecología (Dpto. CC.Agrar.y Medio Natural)