What are the main features of coral reefs?
Deposits of calcium carbonate and coral (living organism)
Coral reefs are sensitive to changes in temperature, water depth, and cleanliness of water.
What temperature range is optimal for coral reefs?
23°C to 25°C
What is the maximum water depth for coral reefs to grow?
Around 25 meters
What are the key rainfall levels needed for mangroves?
Between 1,500 and 3,000mm per annum
What temperature is optimal for mangroves?
Around 27°C
What water depth range do mangroves prefer?
Between 0.5 to 2.5 meters
What are the humidity levels suitable for mangroves?
Between 75% and 80%
What forms sand dunes?
A mound of sand formed by the wind
What are the key factors affecting the formation of sand dunes?
What are salt marshes?
Coastal wetlands that are flooded and drained by saltwater brought in by the tides
What is a key characteristic of salt marshes?
Low topography causing shallow water allowing sediment to build up
What are the main goods provided by coral reefs?
How much does tourism related to coral reefs generate in the US annually?
$3.4 billion
What is one important service provided by coral reefs?
Storm and flood protection by reducing wave energy by 97%
What are some goods provided by mangroves?
How much carbon do mangroves store compared to terrestrial forests?
Four times more
What is a unique feature of salt marshes in terms of carbon storage?
Draw down carbon ten times faster than rainforests
What are the abiotic characteristics of the Great Barrier Reef?
What is the main animal that forms coral reefs?
Coral polyps
What is one major threat to the Great Barrier Reef?
Agriculture causing nutrient run-off
What percentage of Bangladesh’s birds live in the Sundarbans?
37%
What is the primary tree species in the Sundarbans?
Sundri
What has caused a decline in the tiger population in the Sundarbans?
Poaching and habitat loss
What is a key threat to the coastal area of Sri Lanka?
Illegal logging of mangroves