R/antarctic_birds.R

In romunov/AED: Package Accompanying 'Mixed Effects Models and Extensions in Ecology with R'

#' Dataset contains information on three bird species frequenting Antartic, the Emperor penguin (\emph{Aptenodytes forsteri}), 
#' Adelie penguin (\emph{Pygoscelis adeliae}) and Cape petrel (\emph{Daption capense}). Variables in the dataset include
#' below variables. Arrival and laying times are days in the year.
#' \itemize{ 
#'     \item ArrivalAP: Arrival time of Adelie penguin to the breeding area
#'     \item LayingAP: Laying time of Adelie penguin
#'     \item ArrivalCP: Arrival time of Cape petrel to the breeding ground
#'     \item LayingCP: Laying time of Cape petrel
#'     \item ArrivalEP: Arrival time of Emperor penguin
#'     \item LayingEP: Laying time of Emperor penguin
#'     \item MSA: Methanesulfonic acid, a proxy for sea ice extent since satellite images are available only from 1970
#'     onwards
#'     \item SOI: Southern oscillation index, also known as El Niño souther oscillation conditions. High positve values
#'      indicate La Niña and low negative values indicate El Niño, which have been shown to have impact on demographic
#'      rates and food resources of many animals, including seabirds. 
#'     }
#' 
#' @name AntarcticBirds
#' @title Antarctic birds and climate change
#' @description Antartic birds (\emph{Aptenodytes forsteri}, \emph{Pygoscelis adeliae}, \emph{Daption capense}) and
#' their phenological data along with some environmental data.
#' @docType data
#' @usage data("AntarcticBirds")
#' @references Barbraud C. and Weimerkirch H. 2006. Antarctic birds breed later in response to climate change.
#' Proceedings of the National Academy of Sciences of the USA 103: 6048-6051.
#' @references Zuur et al. 2009. Mixed effects models and extensions in ecology with R. Springer. ISBN: 978-0-387-87457-9.
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