Exercise
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Living things
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Exercise
The mangroves – Excursion notes
Mangrove trees are often found around the shores where rivers
meet the sea. They usually form extensive forests because so many
of them group together. Sadly, mangrove areas have been used as
rubbish dumps and for disposing of factory wastes. Mangroves
have also been cut down to be replaced by tourist resorts.
First impressions
• Describe the mangrove environment.
(Four lines)
• List the animals that you have observed on your walk through
the mangroves.
(Four lines)
•
Mangrove feeding relationships
The diagram following shows a food web in a mangrove
ecosystem. It is an unusual food web because many of the food
chains start from a material called detritus. This material consists
of the broken down leaves of mangrove trees as well as any other
organic material. It forms a rich oozy material that is found on the
floor of mangrove areas. These pieces of mangrove leaves become
food for molluscs, worms, young fish, crabs and prawns. These
animals are then eaten by larger fish, crabs and birds.
What are plants and animals? 10/20
1
•
In the diagram below what is the producer(s)?
•
The producers are eaten by herbivores. Write down two organisms
that are herbivores.
(Two lines)
•
The herbivores are eaten by carnivores. Write down two organisms
that are carnivores.
(Two lines)
Mangrove food web
© State of New South Wales, Department of Education and Training, 2004
• Write three food chains to represent the feeding relationships in
the mangrove environment.
(Four lines)
• Do you think that mangrove environments should be protected?
Explain your answer.
2
Living things 10/20
(Six lines)
What are plants and animals? 10/20
3