R/snowmelt.R

In ecostats: Code and Data Accompanying the Eco-Stats Text (Warton 2022)

#' How flowering time relates to snowmelt date
#'
#' Data from a study of how time from snowmelt to flowering relates to snowmelt date and elevation
#' (Wheeler et al 2016) in \emph{Salix herbacea}, based on about 120 plots on each of three mountains in the Swiss Alps.
#' 
#' @docType data
#'
#' @usage data(snowmelt)
#'
#' @format A dataframe containing:\describe{
#' \item{id}{Plot patch ID}
#' \item{flow}{Number of days from snowmelt day to flowering}
#' \item{snow}{Snowmelt day of year}
#' \item{sex}{Sex of patch, corrected across years, NA - no flowering, 0 - male, 1 - female}
#' \item{elev}{Elevation (from dGPS)}
#' }
#'
#' @keywords datasets
#'
#' @references 
#' Wheeler, J. A., Cortés, A. J., Sedlacek, J., Karrenberg, S., van Kleunen, M.,
#' Wipf, S., Hoch G., Bossdorf, O. & Rixen C. (2016) The snow and the willows: earlier
#' spring snowmelt reduces performance in the low-lying alpine shrub \emph{Salix herbacea}.
#' Journal of Ecology \bold{104}, 1041-50.
#'
#' @examples
#' data(snowmelt)
#' plot(flow~snow,data=snowmelt, log="y")
"snowmelt"