ecotraj: Ecological Trajectory Analysis

#' Avoca permanent plot dataset
#'
#' Example dataset with data from 8 permanent forest plots located on slopes of a valley in the New Zealand Alps. 
#' The study area is mountainous and centered on the Craigieburn Range (Southern Alps), South Island, New Zealand.  
#' Forests plots are almost monospecific, being the mountain beech (Fuscospora cliffortioides) the main dominant tree species. 
#' Previously forests consisted of largely mature stands, but some of them were affected by different disturbances during the sampling period (1972-2009) 
#' which includes 9 surveys.
#' 
#' @encoding UTF-8
#' @format Three data items are included:
#' \describe{
#'  \item{avoca_strat}{An object of class \code{stratifiedvegdata} (see function \code{stratifyvegdata} from package 'vegclust') with structural and compositional data.}
#'  \item{avoca_sites}{A vector identifying sampled sites of each element in \code{avoca_strat}.}
#'  \item{avoca_surveys}{A vector identifying surveys of each element in \code{avoca_strat}.}
#' }
#'
#' @name avoca
#' @aliases avoca_sites avoca_strat avoca_surveys
#' @docType data
#' @source New Zealand National Vegetation Survey (NVS) Databank (https://nvs.landcareresearch.co.nz/).
#' @keywords data
#' @references 
#' Allen, R. B., P. J. Bellingham, and S. K. Wiser. 1999. Immediate damage by an earthquake to a temperate montane forest. Ecology 80:708–714.
#' 
#' Harcombe, P. A., R. B. Allen, J. A. Wardle, and K. H. Platt. 1998. Spatial and temporal patterns in stand structure, biomass, growth and mortality in a monospecific Nothofagus solandri var. cliffortioides (Hook. f.) Poole forest in New Zealand. Journal of Sustainable Forestry 6:313–343.
#' 
#' Hurst, J. M., R. B. Allen, D. A. Coomes, and R. P. Duncan. 2011. Size-specific tree mortality varies with neighbourhood crowding and disturbance in a montane Nothofagus forest. PLoS ONE 6.
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