Characteristics of a sample of West African rivers.
Format
A data frame of 39 observations on the following 6 variables:
- river
name of the river.
- richness
fish species richness.
- surface
surface area in \(km^2\).
- disch
mean annual discharge in \(\frac{m^3}{s}\).
- vegdiv
terrestrial vegetation diversity (Shannon's diversity index of vegetation in drainage).
- forperc
percentage of drainage area covered by lowland rain forest.
Source
From Table 1 in Hugueny, B. 1989. West African rivers as biogeographic islands: species richness of fish communities. Oecologia 79:236-243. CSV file
Examples
data(AfricanRivers)
str(AfricanRivers)
#> 'data.frame': 39 obs. of 6 variables:
#> $ river : Factor w/ 39 levels "Agnebi","Bandama",..: 23 33 9 36 12 11 10 34 17 15 ...
#> $ richness: int 127 110 89 55 74 58 65 61 44 45 ...
#> $ surface : int 3349000 441000 77000 23200 16470 7540 7750 19050 18760 8260 ...
#> $ disch : int 2640 687 170 NA 353 NA NA NA NA NA ...
#> $ vegdiv : num 2.62 0.97 0.5 NA 0 NA NA NA NA NA ...
#> $ forperc : int 8 3 20 NA 100 NA NA NA NA NA ...
head(AfricanRivers)
#> river richness surface disch vegdiv forperc
#> 1 Nile 127 3349000 2640 2.62 8
#> 2 Senegal 110 441000 687 0.97 3
#> 3 Gambia 89 77000 170 0.50 20
#> 4 Tomine 55 23200 NA NA NA
#> 5 Konkoure 74 16470 353 0.00 100
#> 6 Kolente 58 7540 NA NA NA