ecopath_guinee | R Documentation |
This example dataset is extracted from the 2004 Guinean Ecopath model (Gascuel et al., 2009). It provides a template for the input table formatting, the wanted variables names and the different capabilities of this package (used in function's examples).
data(ecopath_guinee)
A data.frame with 35 observations on the following 8 variables.
group_name
a character vector corresponding to the names of the trophic groups used in the Ecopath model. Has obligatory to be written 'group_name'.
TL
a numeric vector corresponding to the trophic level of the associated trophic groups. Has obligatory to be written 'TL'.
biomass
a numeric vector corresponding to the biomass of the associated trophic groups. Has obligatory to be written 'biomass'.
prod
a numeric vector corresponding to the production on biomass ratio. For the Detritus groups (no P/B value entered in Ecopath), put 0 as a value. Has obligatory to be written 'prod'.
catch.1
a numeric vector corresponding to the catch of the artisanal fleet. A value must be entered for all groups, with a 0-value if no catch are made. Has obligatory to be written 'catch.something'.
catch.2
a numeric vector corresponding to the catch of the industrial fleet. A value must be entered for all groups, with a 0-value if no catch are made. Has obligatory to be written 'catch.something'
accessibility
a numeric vector corresponding to the fraction of the trophic group that can be catch assuming an infinite fishing effort. Has obligatory to be written 'accessibility'.
OI
a numeric vector corresponding to the omnivory index calculated by Ecopath for each trophic group. Has obligatory to be written 'OI'.
No NA are accepted in the dataset (0 for the P/B of the detritus groups, 0 for the catch...). Follow the instructions stated in the variables descriptions. Different fleets can be entered in the model using the following system: catch.1, catch.2, catch.whatyouwant... If there is only one fleet, you just have to put catch as a variable name.
Gascuel et al. (2009) Impact de la peche sur l'ecosysteme marin de Guinee - Modelisation EwE 1985/2005 -
data(ecopath_guinee) ecopath_guinee names(ecopath_guinee)
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