Chagos: Coral fish, seabirds and reef productivity study by Graham et...
In HellCor: The Hellinger Correlation

Description Usage Format Author(s) References Examples

Data set investigated in Graham et al (2018). It contains several variables describing fish and seabirds populations on twelve islands of the Chagos Archipelago (British Indian Ocean Territory).

1	data(Chagos)

A data frame with 12 observations on the following 7 variables.

Atoll: Factor with 3 levels. Atoll containing several islands.
Island: Factor with 12 levels. Name of the island.
Treatment: Factor with 2 levels. Presence or absence of rats on the island.
Seabirds_ha: Numeric vector of the number of birds per hectare of island.
kg_N_ha_yr: Numeric vector of nitrogen input (in kg) by seabirds per hectare of island over a one year period.
Number_of_fishes: Integer vector of the number of fishes recorded during underwater visual surveys along the reef crest of each island on the lagoonal side of each atoll.
biomass: numeric vector. Fish counts were converted into biomass using published length-weight relationships from FishBase.

Geenens G., Lafaye de Micheaux P.

Graham N. A. J., Wilson S. K., Carr P., Hoey A. S., Jennings S., MacNeil M. A. (2018). Seabirds enhance coral reef productivity and functioning in the absence of invasive rats. Nature 559, 250–253.