Nematocera {BSagri}R Documentation

Eklektor counts of Nematocera

Description

In a field trial, 4 treatments (A,B, Standard, Novum) were arranged in a randomized complete block design with 8 blocks and 32 plots. In summer 2005 soil eklektor traps were placed in each plot, on six dates from 2005-07-12 to 2005-09-25, the number of individuals of Nematocera (gnats, midges and others) hatching from soil were counted. The individuals were classified to the family level. Interest was in assessing potential effects of a novel agricultural practice (Novum) on the abundance of Nematocera.

Usage

data(Nematocera)

Format

A data frame with 192 observations on the following 14 variables.

Date
a POSIXt, the time of counting the individuals in the eklektor trap
Treatment
a factor with 4 levels, A, B, Standard and Novum, where Novum is the novel treatment, Standard is the standard treatment most similar to Novum, and A and B are additional standard treatments.
Block
a numeric vector, specifying the blocks 1-8
Plot
a factor with 32 levels A1 to Standard8, indicator variables for the individual eklektors
Bibio
a numeric vector, counts of individuals, belonging to the family
Cecido
a numeric vector, counts of individuals, belonging to the family
Cerato
a numeric vector, counts of individuals, belonging to the family
Chiro
a numeric vector, counts of individuals, belonging to the family
Myceto
a numeric vector, counts of individuals, belonging to the family
Psycho
a numeric vector, counts of individuals, belonging to the family
Scato
a numeric vector, counts of individuals, belonging to the family
Sciari
a numeric vector, counts of individuals, belonging to the family
Tipuli
a numeric vector, counts of individuals, belonging to the family
Total
a numeric vector, total count of individuals belonging to the suborder Nematocera

Source

...

Examples

data(Nematocera)

par(mar=c(11,5,3,1))

boxplot(Total ~ Treatment*Date, data=Nematocera, las=2, col=c("white","white","blue","green"))
legend(x=15, y=100, legend=levels(Nematocera$Treatment), fill=c("white","white","blue","green"))

pairs(Nematocera[,c("Cecido","Cerato","Chiro","Myceto","Psycho","Sciari")])


[Package BSagri version 0.1-5 Index]