sites.google.com/site/pandeabhishekxA Coral abhishek-pande66.blogspot.com. reef is a colony of millions of tiny animals called polyps.They produces a hard , limestone skeleton, on which the next generation of polyps grow.Corals also contain a algae, which is essential for their survival.
A coral looks like an jellyfish , with a tubular body and tentacles around its mouth.
Reef building corals use their tentacles to catch plankton from the water.
Types of Corals-The main types of corals are-hard stony corals that build reefs, and soft corals that don't built reefs ,some of them are- Brain corals It is a hard coral , its wrinkled edges make it look like a giant brain.
Stag horn coral -This is a antler like coral ,it grows very fast on the reef.
Dead man's fingers- Its tentacles looks like decomposing fingers.
Fan corals- Its polyps link together to form a large lacy skeleton.
Barrier Reef-It is found off shore.Barrier reefs are separated from land by deep lagoon.
Atoll reef- A ring of coral that grows on top of a sunken volcano forming a lagoon is called an atoll.
Platform reef-When coral reaches the surface of the sea and branches out, growing horizontally, a plat form reef is formed.
GREAT REEFS OF WORLD-
The Great Barrier Reef(Australia)-It is the longest reef in the world, more than 2,010 km (1250 miles) long.It consists of 3,000 reefs. It is the largest living structure on the Earth.It is the home to 1,500 species of fish,175 species of birds and 500 species of corals.
Kwajalein ,Marshall Islands- It is the world's largest atoll surrounds a lagoon 97 km long.
Many corals on the Great barrier Reef produce eggs once a year.All eggs are produce at the same time, after the full moon in October or November. This is a spectacular view under water as the sea is filled with eggs.
But , Coral Reefs are under threat now.Some threats are-
Global warming-The rise in temperature , adversely affect the corals as algae in corals dies due to rise in temperature .This kills the coral which depends on it.
Pollution- Reefs are damaged by the pollution from sewage, mining, pesticides and oil spills.
Over fishing- The overfishing of sea urchins , which predates on coral eating starfish - leaves corals vulnerable.
Aquarium trade- Some fisherman ,use cyanide poison to stun fish , then use crow bars to rip apart the coral to get at the fish.
CORAL REEFS
Great Barrier Reef
A coral looks like an jellyfish , with a tubular body and tentacles around its mouth.
Reef building corals use their tentacles to catch plankton from the water.
Types of Corals-The main types of corals are-hard stony corals that build reefs, and soft corals that don't built reefs ,some of them are- Brain corals It is a hard coral , its wrinkled edges make it look like a giant brain.
Stag horn coral -This is a antler like coral ,it grows very fast on the reef.
Dead man's fingers- Its tentacles looks like decomposing fingers.
Fan corals- Its polyps link together to form a large lacy skeleton.
- Coral Reefs- The Coral reef covers less than 1 per cent of the Earth's surface. But they are the homes of twenty five percent of all marine fish species.Reefs are useful in many ways to human.-Chemical compounds found in reefs are used to make several important medicines.
- Coral reefs form natural barrier that protect nearby shorelines from strong waves or currents.
- Coral polyps turn the carbon dioxide in water into limestone.With out Corals the amount of carbon-Di-oxide in the water would rise, destroying precious habitats.
Barrier Reef-It is found off shore.Barrier reefs are separated from land by deep lagoon.
Atoll reef- A ring of coral that grows on top of a sunken volcano forming a lagoon is called an atoll.
Platform reef-When coral reaches the surface of the sea and branches out, growing horizontally, a plat form reef is formed.
GREAT REEFS OF WORLD-
The Great Barrier Reef(Australia)-It is the longest reef in the world, more than 2,010 km (1250 miles) long.It consists of 3,000 reefs. It is the largest living structure on the Earth.It is the home to 1,500 species of fish,175 species of birds and 500 species of corals.
Kwajalein ,Marshall Islands- It is the world's largest atoll surrounds a lagoon 97 km long.
Many corals on the Great barrier Reef produce eggs once a year.All eggs are produce at the same time, after the full moon in October or November. This is a spectacular view under water as the sea is filled with eggs.
But , Coral Reefs are under threat now.Some threats are-
Global warming-The rise in temperature , adversely affect the corals as algae in corals dies due to rise in temperature .This kills the coral which depends on it.
Pollution- Reefs are damaged by the pollution from sewage, mining, pesticides and oil spills.
Over fishing- The overfishing of sea urchins , which predates on coral eating starfish - leaves corals vulnerable.
Aquarium trade- Some fisherman ,use cyanide poison to stun fish , then use crow bars to rip apart the coral to get at the fish.
CORAL REEFS
Comments
Post a Comment