arrecifes {ADER}

Californian Reefs

Description

Data about competition between seaweeds and sessile benthic invertebrates in three Californian reefs. Data were collected in sixteen 40 m x 2 m transects during 8 years. This dataset includes the "non-urchin barren" (transects where the density of sea urchins was low, which includes 4 transects x 7 yr + 6 transects x 6 yr +1 transect x 5 yr).

Usage

data("arrecifes")

Format

A data frame with 69 observations on the following 3 variables.

sitio

Location of the transect. A factor with three levels: Carpinteria, Mohawk and Naples.

algas

Percentage cover of seaweds.

invertebrados

Percentage cover of sessile invertebrates.

Details

These data have been digitized from Figure 3a of Arkema et al. 2009.

Source

Arkema, K,K., Reed, D.C., and Schroether, S.C. 2009. Direct and indirect effects of giant kelp determine benthic community structure and dynamics. Ecology 90: 3126-3137.

Examples

data(arrecifes)
str(arrecifes)