Recent flood plain:
This region comprises of the vast plain land of
Bangladesh. The land is formed by the alluvium carried by different rivers,
particularly the Ganges, the Brahmmaputra and the Padma.
Environmental
characteristics: The
soil of this region is made of alluvium and is very fertile. In the rainy
season many aquatic plants, by death and decomposition, converted to organic manure
and thus make the soil more fertile.
Plants:
Among the aquatic plantsNymphaea
noucheli(Shapla) [our
national flower], Lotus, Ipomea, Halencha, Shola, Vallisnaria (Pat Shaola) Urticularia,Azolla, Lamna, Wolfia (smallest flowering plant)
Eichornea (Kachuripana),
Pistea (Topapana),
Trapa (Paniphal),
Polygonum (Panimarich), and
varioustypes of grasses are the major plants. In this region there grows plenty
of fresh water algae among which phytoplankton, a primary producer, serve as
the food of fish and other aquatic animals.
In uncultivated lands, Kalkesunda (Cassia), Shetodron (Leucas) Raktodron, Dhutura (Datura), Hatishur (Heliotropium), Mikania, Bhat (Clerodendron), Muktajhuri (Acalypha), Kachu (Colocasia), Khagra (Xanthiun) etc. are the major plants. Around the houses
betel nut, coconut, mango, jackfruit, banana, litchi, tamarind, plum,
jamboline, bamboos, Barun, Pipul, Akondo (Calotropis) etc. are the main plants.
Among the crop plants paddy (Oryza
sativa), deep-water rice (a
variety of paddy grown in deep water), and jute (Chorchorus sp.) are the main.
Animals: In this region there live different species
of small and large animals.Among them, toad, frog, lizard, tortoise, different
varieties of snakes, mongoose, sparrow, Shalik, Moyena, parrot, crow, kite,
vulture, buffalo, cow, goat, sheep etc. are notable. Besides these, in the
rivers of this region there is fresh water dolphin (Shushuk) and different
species of fish. In ponds and other water reservoirs there are many species of
small and big fishes, aquatic snakes, tortoise etc.
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