Estimating Epiphyte Abundance in High-Elevation Forests of Northern British Columbia


high elevation forest
Engelmann soruce
subalpine fir

How to Cite

Campbell, J., Stevenson, S. K., & Coxson, D. S. (1999). Estimating Epiphyte Abundance in High-Elevation Forests of Northern British Columbia. Selbyana, 20(2), 261–267. Retrieved from


We characterized the distribution patterns of arboreal lichens in a wet temperate spruce-fir (Picea engelmanniil Abies lasiocarpa) rain forest in east-central British Columbia. Using the single rope technique for canopy access, we employed the "clump method" to estimate the abundance of arboreal lichens in three functional groups: Alectoria, Bryoria, and folióse lichens. Verification was achieved through a regression of those estimates with lichen biomass measured on a subset of branches. We used a probability proportional to prediction sampling scheme such that the probability that a branch would be selected for measurement was proportional to its estimated lichen abundance. Used in this way, the clump method is a reliable estimator of lichen abundance that can be used to accurately describe the distribution of lichen biomass in tree crowns. Hemos caracterizado la distribución de muestras de liqúenes arbóreos en un abeto-pino (Picea engelmanniil Abies lasiocarpa), humedo, templado bosque al este de British Columbia central. Usando el método "single rope," técnica de cuerda simple, aplicamos el método de grupo para estimar la abundancia de liqúenes abóreos en tres grupos funcionales; Alectoria, Bryoria y liqúenes frondoso. La comprobación fue realizada a través de una regresión de estimaciones con liqúenes mediante una prueba aparte (subsample) obtenido a través de probabilidad proporcional a pruebas pronosticas. La evaluación de la combinación de esas técnicas muestra que el método grupo (clump method) es un estimador seguro de liqúenes abundantes que se puede usar para producir un selección datos objectivo que describe con exactitud la distribución de epífita liqúenes de biomasa.


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