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#5855 Forest Stream, Mato Grosso do Sul, Coxim, Brazil

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Brazil, Mato Grosso do Sul, Coxim

The Taquari is unique in the world, because it has the largest alluvial fan in the world, and it is a natural river showing all its characteristics.

Submitted by
Arif Hikmet Başeğmez
GPS
-18.4822445, -54.7792587
Geographical region
South America
Drainage Basin
Paraguay river
River catchment
Taquari river
Water body type
Creek
Water body name
Rio Verde de Mato Grosso
Water body part
Rapids
Water body course
Headwaters
Water body: tributary of
Rio
Tributary name
Taquari

Videos above and below water

Water Chemistry

Water information

Water type
Fresh water
Water color
Black water
Water transparency
Low
Concentration of sediments
Low
Water temperature
27 °C
Water flow/curent
Slow

Chemical parameters

pH
6.8
Conductivity
110
GH
3 mg/l
KH
2 mg/l
Dissolved Oxygen

Substrate in nature

Sand
Beige
Pebble/Gravel
Mixed
Stone
None
Stone form
Silt/Mud
Beige
Leaves
Many
Driftwood
Many
Submerged terrestrial vegetation
Yes

Aquatic Biotope

Date of collecting
Collecting area
Water depth
Air temperature
Sunlight

Environment

Environment
Affected by human activity
Affected by human activity
Agriculture
Agriculture
Advanced
Surrounding area

The Pantanal is the largest complex of wetlands in the world, and it is part of the Upper Paraguai River Basin. The Pantanal wetlands comprise nearly 250.000km². The Taquari is one of its largest rivers which has a length of about 800km and about 500km of it is in the wetlands of the Pantanal. The size of the high Taquari River basin is 29.000km², and the area of the river basin in the Pantanal is about 50.000km².

Underwater landscape

The substrate of the river is fine white sand, which makes the river clear and transparent. Roots, branches and leaves fall into the river and gather in the slow-flowing area, provide shelters for inhabiting fishes. When the rainy season comes, the river will flood the area on the shore, and more terrestrial plants will be submerged in the water, providing additional shelters and food for fish.

Fishes:

  • Apistogramma trifasciata (Cichlidae)
  • Hyphessobrycon herbertaxelrodi (Characidae)
  • Hemigrammus ulrey (Characidae)
  • Brycon hilarii (Bryconidae)

Aquatic plants:

  • Eleocharis minima (Cyperaceae)
  • Cyperus sp. (Cyperaceae)
  • Hydrocharis laevigata (Hydrocharitaceae)
  • Ludwigia inclinata (Onagraceae)
Threats to ecology

Pantanal, the paradise, seems under threat. The landscape of the highlands that surround the Pantanal, the Planalto is part of the biogeographic zone of the Cerrado. The Cerrado biome is situated south of the Amazone from the dry northeast to the Pantanal. It consists of poor soils, fine sand and silt with low organic content. It is highly erosive and its soil can easily be taken away by rain or wind. In the upper Taquari, the erosive area is about 13.380km² (46% of its area).

A considerable change has taken place in land use. The loss of soil is serious on an area of 12.603km² (44% of the high catchment). The yearly average potential loss here at present is 556 t/ha. This results in a sediment discharge at Coxim in 1995 of 2000m3 per day.

The sanding up of the Rio Taquari at the moment is a major problem, because of the nearly permanent inundation of large area in a region of about 11.000km² in the sub-region Paiaguás. Solving that problem is difficult as there is no coherent river management organization and the nature of the river, especially in the lower reach, is unknown. The knowledge to make decisions for tackling both problems is lacking. It is the challenge of this project that to deliver that knowledge.

The main problem that has been indicated by the people living in the area of the Pantanal has been the national colonization in the 1970s that had completely changed the land cover and land use of the Planalto. This is where they search the main cause of their present problems.

Riparian zone

Trees near the aquatic habitat
Many -