#' Quantitative component of effectiveness for Prunus mahaleb-frugivorous birds interactions.
#'
#' Data from a study on Prunus mahaleb (Rosaceae) seed dispersal by frugivorous
#' animals in SE Spain. Visitation data come from 107.3 h direct watches.
#'
#' Variables include:
#'
#' # Visitation data come from 107.3 h direct watches.
#' abundance- Mean no. birds censused/km, averaged for two study years.
#'
#' visits- Mean no. visitis recorded to fruiting trees (/10 h).
#'
#' prop_visits- Proportion of total visits recorded (feeding records)
#' contributed by species. Relative to the total no.
#' records in two study years.
#'
#' eff_per_vis- Mean no. fruits swallowed per visit (successfully
#' dispersed seeds).
#'
#' eff_total- Visit rate * eff_per_vis*prop fruits swallowed.
#'
#' prop_disp_service- Proportion of total dispersal service contributed by
#' species.
#'
#' @docType data
#'
#' @usage data(prunus)
#'
#' @format A dataset (dataframe).
#'
#' @keywords datasets
#'
#' @references Schupp, E. W., Jordano, P. and Gomez, J.M. 2010. Seed dispersal effectiveness revisited: a conceptual review. New Phytologist 188: 333-353.
#'
#'Jordano, P. and Schupp, E.W. 2000. Seed disperser effectiveness: The quantity component and patterns of seed rain for Prunus mahaleb. Ecological Monographs 70: 591–615.
#'
#' @source \href{https://raw.githubusercontent.com/pedroj/effectiveness/master/data.txt}{Data txt archive}
#'
"prunus"
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