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Middle Rio Negro, Amazonas, Brazil
Brazil, Amazonas, Barcelos
This 86L aquarium boasts species of fish found thriving here among the maze of roots and downed branches in the shallows of a tiny section of flooded woodland not far from the city of Barcelos. The Cardinal tetra (Paracheirodon axelrodi), perhaps the most well-known of these, takes centre stage for the majority of this movie, its unmistakable neon blues and reds strikingly contrasted with the tea-colored water.
Igarapé do Daracua’s setting is typical of a variety of shallow, blackwater habitats that can be found throughout the Amazon and its tributaries, particularly the Rio Negro in Brazil and the Orinoco in Colombia and Venezuela. The water is warm at 30°C, very acidic (pH 6.0 in this aquarium), and completely devoid of minerals.
Additionally, the water contains a sizable amount of particulate organic matter, which many fish and invertebrates use as food.
- Submitted by
- Debojyoti Mondal
- Approved by
- Roberto E. Reis, Pablo C. Lehmann and Flávio Lima
- Geographical region
- South America
- Drainage Basin
- Rio Negro
- River catchment
- Water body type
- River
- Water body name
- Rio Negro
- Water body part
- Water body course
- Water body: tributary of
- Rio
- Tributary name
- Amazonas
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Water Chemistry
Water information
- Water type
- fresh-water
- Water color
- Black water
- Water transparency
- Medium
- Concentration of sediments
- Medium
- Water temperature
- 30 °C
- Water flow/curent
- Slow
Chemical parameters
- pH
- 6.5
- Conductivity
- GH
- dGH
- KH
- 3 mg/l
- dKH
- Dissolved Oxygen
Substrate in nature
- Sand
- Beige
- Pebble/Gravel
- Beige
- Stone
- None
- Stone form
- Silt/Mud
- Brown
- Leaves
- Adundant
- Driftwood
- Many
- Submerged terrestrial vegetation
Aquatic Biotope
- Date of collecting
- Collecting area
- Shore line
- Water depth
- 0,5m
- Air temperature
- Sunlight
- Full sun
Environment
- Environment
- Affected by human activity
- Affected by human activity
- Agriculture
- Agriculture
- Advanced
- Surrounding area
- Underwater landscape
This 86L aquarium boasts species of fish found thriving here among the maze of roots and downed branches in the shallows of a tiny section of flooded woodland not far from the city of Barcelos. The Cardinal tetra (Paracheirodon axelrodi), perhaps the most well-known of these, takes centre stage for the majority of this movie, its unmistakable neon blues and reds strikingly contrasted with the tea-colored water.
Igarapé do Daracua’s setting is typical of a variety of shallow, blackwater habitats that can be found throughout the Amazon and its tributaries, particularly the Rio Negro in Brazil and the Orinoco in Colombia and Venezuela. The water is warm at 30°C, very acidic (pH 6.0 in this aquarium), and completely devoid of minerals.
Additionally, the water contains a sizable amount of particulate organic matter, which many fish and invertebrates use as food.
- Threats to ecology
Comment by the expert
Roberto E. Reis: Description of the location weak, with no relevant mentions to the surroundings. No description of threats. No photos of the biotope except frames from a YouTube video. No biotope inhabitants listed, fish, plants or invertebrates. Description of the aquatic habitat, riparian zone, and underwater landscape weak. Bibliography/Sitography very weak.
Flávio Lima: The biotope recreated by the participant can be considered a faithful reproduction to a type of habitat found at the middle Rio Negro. The biotope would have benefitted in having 2-3 additional species typical from that area.
Pablo C. Lehmann: No video of the natural biotope was provided.
