Fig 1.
Rodent richness and turnover across South America.
(a) Rodent richness, and (b) its turnover. Turnover was calculated as the average of the Simpson-dissimilarity index (βSIM—[3]) between a focal cell and each of its eight neighboring cells.
Fig 2.
Richness of restricted-range species.
Richness of the 25% of species with the smallest ranges.
Fig 3.
Richness and turnover of rodent clades across South America.
(a) Caviomorph richness; (b) Sigmodontine richness; (c) Caviomorph turnover; (d) Sigmodontine turnover. Turnover was calculated as the average of the Simpson-dissimilarity index (βSIM—[3]) between a focal cell and each of its eight neighboring cells.
Fig 4.
The relationship among rodent richness, latitude, longitude, and elevation.
(a) The relationship between mean elevation (m) and longitude (r = -0.26), (b) rodent richness and longitude (r = 0.01), (c) rodent richness and latitude (r = 0.39), and (d) rodent richness and mean elevation (m) (r = 0.14).
Fig 5.
The relationship among caviomorph richness, latitude, longitude, temperature and elevation.
(a) The relationship between caviomorph richness and latitude (r = 0.50), (b) caviomorph richness and mean temperature (C°) (r = 0.50), (c) caviomorph richness and longitude (r = 0.17), and (d) caviomorph richness and mean elevation (m) (r = -0.07).
Fig 6.
The relationship among sigmodontine richness, latitude, longitude, and elevation.
(a) The relationship between sigmodontine richness and latitude (r = 0.14), (b) sigmodontine richness and longitude (r = 0.01), (c) sigmodontine richness and mean elevation (m) (r = 0.31). Cells highlighted in yellow in plots (b) and (c) are depicted in yellow in the corresponding maps (e) and (d), respectively.
Fig 7.
Predictors of rodent richness and turnover.
(a) Mean Annual Temperature, one of the major predictors of rodent richness; (b) Mean elevation, one of the major predictors of rodent richness; (c) Differences in elevation between a focal cell and its neighbors, the main predictor of species turnover.
Table 1.
Partial regression analysis of richness and turnover of rodents in South America.
Table 2.
Multiple regression models for richness and turnover of rodents in South America.
Fig 8.
Richness of the four superfamilies of caviomorphs in South America.
Richness of (a) Octodontoidea, (b) Cavioidea, (c) Chinchilloidea, and (d) Erethizontoidea in the South American portions of their ranges.
Fig 9.
Richness of the main tribes of sigmodontines.
Richness of (a) Oryzomyini, (b) Akodontini, (c) Thomasomyini, and (d) Phyllotini.