Figure 1.
Watersheds containing Brazilian restricted-range freshwater fishes.
The 540 small scale watersheds are shown according to Brazilian major hydrographic regions.
Table 1.
Number of watersheds, number of species, percentage of native vegetation cover, protection status and number of critical watersheds according to the distribution of 819 restricted-range fish species and the 11 Brazilian main hydrographic regions.
Figure 2.
Examples of critical watersheds.
(a) Watershed showing less than 30% overlap with protected areas. (b) Watersheds showing less than 30% original habitats. (c) Watersheds under direct impact of hydroelectric dam. Dark green lines indicate protected area boundaries, pale green irregular polygons within detected watersheds indicate terrestrial habitat remnants. Dots indicate available records of restricted-range species. 1: Curimata acutirostris Vari & Reis 1995 (Characiformes: Curimatidae); 2: Melanocharacidium auroradiatum Costa & Vicente 1995 (Characiformes: Crenuchidae); 3: Hypostomus paulinus (Ihering 1905) (Siluriformes: Loricariidae); 4: Corydoras flaveolus Ihering 1911 (Siluriformes: Callichthydae); 5: Harttia duriventris Rapp Py-Daniel & Oliveira 2001 (Siluriformes: Loricariidae); Typhlobelus macromycterus Costa & Bockmann 1994 (Siluriformes: Trichomycteridae); 6: Mylesinus paucisquamatus Jégu & Santos 1998 (Characiformes: Characidae).
Figure 3.
Critical watersheds in major Brazilian hydrographic regions.
Classification of Brazilian hydrographic regions according to (a) number and (b) percentage of critical watersheds. Critical watersheds (sites under direct impact of hydropower plants, or under combined poor formal protection and high rates of habitat loss) are marked in red.