Introduction to mangrove forests

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TOPIC: MANGROVE FORESTS

Tutor: Assoc. Prof. Dr. NGUYEN XUAN CU


Main contents:
I.

Conspectus about mangroves
forest
II. Real situations and consequences
and impacts on mangrove forests
III. Causes and solutions
IV. Conclusion


I. Conspectus about
mangroves forest
1. Definition
Mangroves forest is a kind of forest which
distribute near river mouth, inshore when
tide, trees forest will be underwater a
part or whole. However, when low tide,
they appear on the wasteland. There,
plants have a big fasciculate root.


Can Gio forest

Sac forest in Can Gio


U Minh Ha forest


2. Distribution
• The mangroves forest account for 12.3% on the
surface of the earth (approximately 137760 km2)
• According to Science Daily, the mangroves forest
was found over 118 countries and territorial
regions. In there Asia make up 42%, Africa with
21%, North and Mid America account for 15%,
Ocean 12%,and last one South America 11%.
• The mangroves forest often distribute in coastal,
where pile up soft sediment. We can see them in
river mouth and along sea mouth. There , plants
make up three fourths tropical and subtropical
coast


Distribute forest in Can
Gio- Viet Nam


3. Characteristic
• Animals-plants system in mangroves forest
is very diversified and rich. The mangroves

forest in Southeast Asia is the most
multiform in the world with 46 plants
species in 17plant family and about 158
animal species live on there. The
mangroves forest is a big house in which
almost creature live contain terrestrial and
underwater



Many fish species have to spend a part
of their life cycle in the mangroves
forest


Some crustacean such as crabs ,lobsters are also
diversified. Their life close –knit with mangroves
forest. They was born in ocean ,their larva move on
mangroves forest


• Many kind of soft
body animal often was
seen at foot of tree
of mangroves forest .
• Some kind of bird
come mangrove
forests to search for
food or to shelter

4.Role of mangroves forest
According EO observatory of NASA.
The mangroves forest is one of form
have high level biology on plannet and
they are also specific ecosystem of
tropical and subtropical coast. They
have some important value:


Forest product value :coal,
wood, food ,medicine


Provide livelihood for resident
who live near beach


Make the climate
equable


Make effective shield when
storm and tsunami attack


Breeding ground for
creature

II. Real situation of mangrove
forest and consequences and
impacts on environment


1. Real situation of mangrove
forests

According to UNEP, the mangroves
forests are disappearing with rapid
speed: 20% of mangrove forests
worldwide in the world (about 35,500
km2) have been lost since 1980
The mangrove forests destruction
occurred more 4 times faster than any
other kind of forest destruction


Under 7% of mangrove forest
areas in the world is protected by law


The percentages of original
mangroves forests lost per
year:
•
•
•
•
•

Asia: 1.52%
Africa: 1.25%
Australia: 1.99%
America: 3.62%
The world: 2.07%
The figures above will continue to
increase in the future


The disappearance of mangrove
forests reduced to 0.7% out of a year
now, but scientists insist that
mangrove forest is still being
seriously threatened