El uso del ajuste lineal en los espectros de tamaño de biomasa para diseñar indicadores ecosistémicos
DOI:
https://doi.org/10.3989/scimar.03708.22APalabras clave:
espectro de tamaños de biomasa, distribución de Pareto, modelo bioenergético, hipótesis de la biomasa constante, redes tróficas complejas, gestión del ecosistemaResumen
Los espectros de tamaño de biomasa son un método ataxonómico para describir la estructura de comunidades acuáticas. La pendiente (b) del espectro de tamaños de biomasa normalizado (ETBN) se usa como un indicador del impacto de perturbaciones tales como polución y sobrepesca. El intercepto del ETBN (a) ha sido normalmente ignorado debido a una correlación observada entre la pendiente y el intercepto del ETBN, aunque no se ha demostrado la recurrencia de esta correlación. Se evaluó esta correlación entre los parámetros usando: (i) análisis teórico, (ii) comunidades virtuales generadas aleatoriamente basado en consideraciones estadísticas, y (iii) redes tróficas virtuales cambiando en el tiempo siguiendo un modelo bioenergético dinámico. Además, se analizó si los parámetros de la distribución de Pareto estaban o no correlacionados usando los enfoques (i) y (ii). Cuando las comunidades cambian en el tiempo no existe una única correlación entre los parámetros del ETBN, debido a una dependencia en la variación de la abundancia comunitaria (N). Para caracterizar cualquier sistema acuático se necesitan al menos dos coeficientes del ETBN de la triada N, a, b. En la distribución de Pareto los dos parámetros, NPareto y bPareto, son necesarios.
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