bin

Monsoon floodplains, West Bengal, India

Sponsored by

India, West Bengal, Kolkata

The floodplains of West Bengal, India are mostly fertile grazing lands which gets flooded with water when the adjacent water bodies are filled with rain water.

During the months of monsoon in India, most of the bulbs of Nymphaea varieties starts to sprout on the lands filled in fresh rain water, which cannot be seen on rest of the year. Also a person with keen eye and interest can notice the transformation of aquatic plants, from emerged to submerged. This beautiful transformations can mostly be seen on Sagittaria guayanensis and Eriocaulon breviscapum along with Eriocaulon parviflorum. From June to October this lands flourish exponentially, dries up from late October and silently waits for next years Monsoon.

Also during this period most of the native fishes like Pethia phutunio, Pethia aurea, Chanda ranga, Badis badis, Macrognathus pancalus, Aplocheilus lineatus, Channa striata, Channa gachua, Esomus danricus, Brachygobius nunus, Oryzias dancena etc. breeds along with shrimps.

Submitted by
Debanjan Banerjee
Approved by
Friedrich Bitter & Sujoy Banerjee
GPS
22.5749454, 88.3605652
Geographical region
Southern Asia
Drainage Basin
Ganges River basin
River catchment
Hooghly iver
Water body type
Pond
Water body name
Monsoon Marshes
Water body part
Marsh land
Water body course
Water body: tributary of
Tributary name

Warning: Undefined variable $fish_parent in /home/biotopea/public_html/wp-content/themes/bap/content-bin.php on line 55

Warning: Undefined array key "additional_species" in /home/biotopea/public_html/wp-content/themes/bap/functions/bap-fields.php on line 349

Water Chemistry

Water information

Water type
fresh-water
Water color
Clear water
Water transparency
Medium
Concentration of sediments
Medium
Water temperature
32.1 °C
Water flow/curent
None

Chemical parameters

pH
9.0
Conductivity
2
GH
125 mg/l
dGH
KH
6 mg/l
dKH
Dissolved Oxygen
7 %

Substrate in nature

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

Aquatic Biotope

Date of collecting
17 July, 2023
Collecting area
Flooded area
Water depth
0,5m
Air temperature
33 °C
Sunlight
Full sun

Environment

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

The said waterbody was once a serene habitat for all kinds of flora and fauna. The upper layer of waterbody is covered with water hyacinth and hornworts on which many local terrestrial and water birds hunt for food. On recent days encroachment has invited many morning walkers and heavy petrol runned vehicles disrupting the balance.

Underwater landscape

The water body is covered with nymphaea pods, beneath many of the fishes usually hides. Some fisherman has no respect for aquatic plants due to lack of knowledge and so after fishing from the pond, they cast and drag their fishing nets above and over the aquatic plants, which eventually destroys a lot of ecology.

Fishlist:

  • Pethia phutunio (Cyprinidae)
  • Badis badis (Badidae)
  • Mastacembelus pancalus (Mastacembelidae)
  • Trichopsis vittata (Osphronemidae)

Plant list:

  • Vallisneria natans (Hydrocharitaceae)
  • Ceratophyllum demersum (Ceratophyllaceae)
Threats to ecology

Building illegal roads on wetlands and forced encroachment by making roads for public transport through this wetlands caused havoc ecological disaster.

Comment by the expert

Friedrich Bitter: Good research on the conditions in the biotopes presented.

Sujoy Banerjee: Well researched Biotope in reference to the plants and fish. A pH 9.0 probably needs a review as generally such high pH may not be present in these biotopes. The water parameters as measured in nature should be reviewed?