R/trichoptera.R

In adespatial: Multivariate Multiscale Spatial Analysis

#' Trichoptera data set
#'
#' A dataset containing the abundances of 56 Trichoptera species captured in 1984  
#' during 100 consecutive days in 22 emergence traps (sites) along the outflow stream  
#' of Lake Cromwell (45°59'13" N, 73°59'47" W) on the territory of Station de
#' Biologie des Laurentides (Université; de Montéal).
#'
#' The original daily data collected at each site were pooled into 10 survey periods
#' for the study of Legendre et al. (2010) in order to reduce the very high proportion 
#' of zeros in the original data matrix. The 22 traps form a regular transect, with
#' geographic positions 1 to 22. 
#'
#' @format A data frame with (10 x 22) = 220 rows and 58 variables (Site, Date, 
#' and 56 species).
#'
#' Row order in the data file: the 22 traps (sites) are nested within the 
#' 10 survey periods. 
#' 
#' @author Data provided by Prof. Pierre-Paul Harper, Département de sciences 
#' biologiques, Université de Montréal.
#'
#' @references 
#' Legendre, P., M. De Caceres & D. Borcard. 2010. Community surveys through
#' space and time to assess environmental changes: testing space-time
#' interaction in the absence of replication. Ecology 91: 262-272.
#'
#' @docType data
#' @keywords datasets
#' @name trichoptera
#' @usage data(trichoptera)
NULL