4. 1. Aquatic Habitat
2. Aquatic adaptation in Animals and
Plants
3. Adaptation to Oceans
4. Adaptations to Ponds, Lakes, and
Rivers
5. Adaptations in Lotus Plant
6. Adaptations in Frogs
5. Habitat:- A place or surrounding
where a living organism lives is
called Habitat
6.
7.
8. When organism live in water, this place of
living is known as aquatic habitat.
Ponds, lakes, rivers, oceans etc are examples of
aquatic habitat.
Aquatic habitat includes both fresh water and
marine water.
Water is a medium in aquatic habitat.
Certain invertebrates are aquatic or semi-
aquatic.
Ex-Insects, Fishes, Whales, Turtles, Seals,
Walrus, Dolphins etc are adapted to aquatic
mode of life.
10. Aquatic Adaptation in Plants and
animals
The adaptive features for aquatic adaptation are:
Body of aquatic animal is compressed laterally to reduce
friction.
Fins in fish and flippers in Whale help in moving
Frogs and duck have webbed feet for swimming
Swim bladder present in fish is filled with air and maintains
buoyancy
Gills are used by fish for respiration.(gills exchange gases
dissolved in water)
Dolphins and Whales do not have gills they breath in air
through nostrils and blowholes. Nostrils are located on the
upper part of their heads
15. Adaptations to Ponds, Lakes, and Rivers
Ponds and Lakes are the habitats for small fish,frogs and
many aquatic plants.
Hydrophytes
The aquatic plants of fresh water are called
hydrophytes.Some of these plants show
adaptation for buoyancy in water and against
decaying in water.
Lotus, WaterLily, Hydrilla, Vallisneria and
Spirogyra are some common Hydrophytes.
16. Adaptations to Ponds, Lakes, and Rivers
Hydrophytes Adaptation
Roots are much reduced in size,to hold the plant in its place
The stem may be long,slender,flexible and spongy.The air
space in spongy stems make them buoyant.
Stems are long,hollow and light.
Thin and flat leaves with waxy surface protects leaves from
wetting and decaying.Ex-water Lily,Lotus
The leaves of submerged plants are narrow.
17. Adaptations to Ponds, Lakes, and Rivers
i. Free floating hydrophytes:
These plants float freely on the surface of water. They remain
in contact with water and air, but not with soil. Examples:
Eichhornia, Pistia and Wolffia (smallest flowering plant).
18. Adaptations to Ponds, Lakes, and Rivers
iii. Submerged floating hydrophytes:
These plants are completely submerged in water and not in
contact with soil and air. Examples: Ceratophyllum and
Utricularia. iv. Rooted- submerged hydrophytes: These plants
are completely submerged in water and rooted in soil and not
in contact with air.
Examples: Hydrilla, Vallisneria and Isoetes.
19. Adaptations to Ponds, Lakes, and Rivers
iii. Rooted floating hydrophytes:
In these plants, the roots are fixed in mud, but their leaves
and flowers are floating on the surface of water. These plants
are in contact with soil, water and air.
Examples: Nelumbo, Nymphaea, Potomogeton and Marsilea.
Lotus seeds show highest longevity in plant kingdom
20. Adaptations to Ponds, Lakes, and Rivers
v. Amphibious hydrophytes (Rooted emergent hydrophytes):
These plants are adapted to both aquatic and terrestrial
modes of life. They grow in shallow water.
Examples: Ranunculus, Typha and Sagittaria.
21. Lotus plant has adapted itself to live in
water as follows
Its stalk contains large tunnels and
holes which help the stalk to float on
water surface
It has large.circular or disc shaped
leaves,which make it float on the water
surface
The huge circular leaf is well adapted
for buoyancy and photosynthesis
It s leaf has an oily surface coat.This
keeps the leaf waterproof and protects
against wetting and decaying.
Adaptations in Lotus
