Figure 1 | Scientific Reports

Figure 1

From: Biogeochemical water type influences community composition, species richness, and biomass in megadiverse Amazonian fish assemblages

Figure 1

The Wallace classification of Amazonian rivers, with typical ranges of physico-chemical properties. Values for floodplain lakes (gray text) are given only where they typically differ from parent rivers. Ranges follow Junk et al.17, Crampton2 and Appendix S4 online. EC conductivity, DOC dissolved organic carbon, LW/HW low/high water, DO dissolved oxygen, Inorg. Inorganic, Herb. herbaceous. aPeriodic phytoplankton (including cyanobacteria) blooms induce DO supersaturation (ca. 8–15 mg L−1) and tint clearwater green. bPrecipitation of suspended silt due to reduced flow in WW floodplain lakes substantially increases transparency relative to parent WW river. cHW hypoxia results from litter decomposition in inundation forests; this effect is greater in large WW floodplains. dShallow WW lakes reach extreme high LW temperature. Photographs are of the R. Arapiuns (blackwater), Tapajós (clearwater) and Amazonas (whitewater) near Santarém, Brazil.

Back to article page