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Jorai River, West Bengal, India

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India, West Bengal, Cooch Behar district

The Jorai River in West Bengal, India, supports diverse flora and fauna within its freshwater ecosystem. Its underwater habitat features moderate to strong water flow, sandy and rocky substrates, and aquatic plants like Vallisneria sp. and Hygrophila sp., which provide shelter for species such as the drape fin barb.

The riparian zone, rich with bamboo, shrubs, and overhanging trees, sustains various wildlife in a subtropical climate influenced by monsoon rains. Human activities like fishing and agriculture pose threats, making conservation efforts essential to maintain the river’s ecological balance.

Submitted by
Devagya Uikey
Approved by
Friedrich Bitter & Sujoy Banerjee
Geographical region
Southern Asia
Drainage Basin
Brahmaputra River Basin
River catchment
Tributaries of the Torsa River within Jalpaiguri District
Water body type
Stream
Water body name
Brahmaputra River
Water body part
Marsh land
Water body course
Middle course
Water body: tributary of
Wetland
Tributary name
Torsa River

Videos above and below water


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Water Chemistry

Water information

Water type
fresh-water
Water color
Clear water
Water transparency
High
Concentration of sediments
Low
Water temperature
23.3 °C
Water flow/curent
Slow

Chemical parameters

pH
7.8
Conductivity
250
GH
dGH
KH
dKH
Dissolved Oxygen
80 %

Substrate in nature

Sand
White
Pebble/Gravel
Beige
Stone
Reddish
Stone form
Irregular
Silt/Mud
Grey
Leaves
Many
Driftwood
Few
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
Pollution
Pollution
Little
Surrounding area

The Jorai River region experiences a subtropical climate with distinct wet and dry seasons, with heavy monsoon rains impacting the river’s flow. The riparian zone is lined with dense vegetation, including bamboo groves, shrubs, and overhanging trees that provide shade and organic matter input.

The surrounding area supports diverse wildlife, including birds, insects, amphibians, and small mammals, all contributing to the ecosystem’s balance.

Terrestrial vegetation:

  • Saccharum elephantinum (Poaceae)
  • Lantana camara (Verbenaceae)
  • Chromolaena odorata (Asteraceae)
Underwater landscape

Fishlist:

  • Oreichthys crenuchoides (Cyprinidae)
  • Dario dario (Badidae)
  • Psilorhynchus sucatio (Psilorhynchidae)
  • Danionella priapus (Cyprinidae)

Crustaceans:

  • Caridina babaulti (Atyidae)

Aquatic plants:

  • Pistia stratiotes (Araceae)
  • Hydrilla verticillata (Hydrocharitaceae)
  • Phragmites australis (Poaceae)
  • Cryptocoryne retrospiralis (Araceae)
  • Cryptocoryne spiralis (Araceae)
Threats to ecology

Human activities like fishing, agriculture, and occasional pollution pose threats to the habitat, necessitating conservation efforts to maintain the natural flow and quality of the river.

Riparian zone

Trees near the aquatic habitat
Many -

Comment by the expert

Friedrich Bitter: The videos offer interesting insights into life underwater.

Sujoy Banerjee: Very well researched biotope, lots of reference biotope videos reference material. Well done.