Protective mangroves a feeding ground for fish
MANGROVES are a group of plants belonging to several families which share the unique ability to grow in coastal areas which are alternatively submerged by the tide, that is to say, the inter-tidal zone.
Commonly found in tropical regions worldwide, the range of mangroves can extend northwards into the sub-tropics to reach Hong Kong, Taiwan and the southern shores of Japan.
Since the low winter temperature restricts the number of species, their stature and their extent, the mangroves in Hong Kong are shorter and less diverse than those in the tropics.
Both tropical and sub-tropical mangroves, however, share a common characteristic, that is they are threatened by human activities. Today, coastal reclamation, unchecked firewood gathering, and pollution are all contributing to the rapid destruction.
The reason for many of today's environmental problems is that nature and natural resources are being under-valued. Mangroves are actually more useful than most people realise.
They are a source of firewood and other useful products, like medicine. They can also act as a protective barrier against destructive storm waves, thus reducing the risk of flooding.
Fishery is greatly dependent upon the mangroves since they provide a rich feeding and nursery ground for fish fry and larvae which are essential to sustain fish stock.
At the Mai Po nature reserve, we have the largest mangrove forest in Hong Kong. If you have the opportunity to visit Mai Po, have a look at the mangroves and remind your colleagues how useful the mangroves are.
