Abundance of Hunting Spiders
Abundances for 12 species of hunting spiders along with environmental predictors, all rated on a 0–9 scale.
data("HuntingSpiders")A data frame containing 28 observations on 18 variables (12 species abundances and 6 environmental predictors).
numeric. Abundance of species Arctosa lutetiana (on a scale 0–9).
numeric. Abundance of species Pardosa lugubris (on a scale 0–9).
numeric. Abundance of species Zora spinimana (on a scale 0–9).
numeric. Abundance of species Pardosa nigriceps (on a scale 0–9).
numeric. Abundance of species Pardosa pullata (on a scale 0–9).
numeric. Abundance of species Aulonia albimana (on a scale 0–9).
numeric. Abundance of species Trochosa terricola (on a scale 0–9).
numeric. Abundance of species Alopecosa cuneata (on a scale 0–9).
numeric. Abundance of species Pardosa monticola (on a scale 0–9).
numeric. Abundance of species Alopecosa accentuata (on a scale 0–9).
numeric. Abundance of species Alopecosa fabrilis (on a scale 0–9).
numeric. Abundance of species Arctosa perita (on a scale 0–9).
numeric. Environmental predictor on a scale 0–9.
numeric. Environmental predictor on a scale 0–9.
numeric. Environmental predictor on a scale 0–9.
numeric. Environmental predictor on a scale 0–9.
numeric. Environmental predictor on a scale 0–9.
numeric. Environmental predictor on a scale 0–9.
The data were originally analyzed by Van der Aart and Smeenk-Enserink (1975). De'ath (2002) transformed all variables to the 0–9 scale and employed multivariate regression trees.
Package mvpart (currently archived, see https://CRAN.R-project.org/package=mvpart).
Van der Aart PJM, Smeenk-Enserink N (1975). Correlations between Distributions of Hunting Spiders (Lycosidae, Ctenidae) and Environmental Characteristics in a Dune Area. Netherlands Journal of Zoology, 25, 1–45.
De'ath G (2002). Multivariate Regression Trees: A New Technique for Modelling Species-Environment Relationships. Ecology, 83(4), 1103–1117.
## load data
data("HuntingSpiders", package = "partykit")
## fit multivariate tree for 12-dimensional species abundance
## (warnings by mvtnorm are suppressed)
suppressWarnings(sptree <- ctree(arct.lute + pard.lugu + zora.spin + pard.nigr + pard.pull +
aulo.albi + troc.terr + alop.cune + pard.mont + alop.acce + alop.fabr +
arct.peri ~ herbs + reft + moss + sand + twigs + water, data = HuntingSpiders,
teststat = "max", minsplit = 5))
plot(sptree, terminal_panel = node_barplot)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.