R: Time Series of Macroinvertabrates Abundance in the Arkansas...

Arkansas {SiZer} | R Documentation

## Time Series of Macroinvertabrates Abundance in the Arkansas River.

### Description

A time series of 16 years (5 replicates per year) of mayfly (Ephemeroptera:Heptageniidae) abundance in the fall at the monitoring station AR1 on the Arkansas River in Colorado, USA.

### Usage

    Arkansas

### Format

A data frame with 90 observations on the following 2 variables.

year

  The year of observation

sqrt.mayflies

  The Square root of observed abundance.

### Source

Sonderegger, D.L., Wang, H., Clements, W.H., and Noon, B.R. 2009. Using SiZer to detect thresholds in ecological data. Frontiers in Ecology and the Environment 7:190-195.

### Examples

    require(ggplot2)

    data(Arkansas)
    ggplot(Arkansas, aes(x=year, y=sqrt.mayflies)) +
       geom_point()

[Package SiZer version 0.1-5 Index]