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       Home > Catalog > Tai O Travel Information > 大澳生物多样性资料库 > Mangroves in Tai O
Mangroves in Tai O
Mangroves in Tai O


Tai O varieties: Tai O is located in the northwest coast of Lantau Island with Zhuhai is located in the mouth, surrounded by mountains, Fengshan, Lion and Tiger Mountain formed the beautiful mountain scenery and natural bay. From the three big mountains of sediment formed in the Tai O within the Bay shallows years, a shoal has been developed for farms, fish ponds and village.

Tai O is an intertidal zone, the influx of more than ebb gap between the low tide of the Tai O Dayton turned into mudflats, the formation of wetland ecosystems. Lang the Kwu ilicifolius a long time ago mangrove growth in Tai O creek and beach. Tai O Fishermen said the mangrove "Long tree" or "Long Kwu ilicifolius. "Long float means, in the 1950s, Australia fishermen had one of the roots of the mangrove species as fishing nets, buoys. "Long Kwu ilicifolius, the meaning is used to describe the volume of small fishing boats can be parked in the mangrove on to avoid the storm.

What is the mangroves: the so-called mangrove (of Mangrove), refers to the growth Branch of the mangrove in the bay or estuary mud of tropical or subtropical trees or shrubs evergreen ecological communities is a unique inter-tidal wetland ecosystem. The mangrove plants developed in the special habitat conditions, they must overcome three major problems of the quagmire of instability, the lack of oxygen and high salt. The mangrove name of the early Malaysian wood Lam a lot of tannin (Malay known as the red bark) to produce a red dye, and also to adapt to such habitat at the plant, also known as the mangrove species.

Mangrove distribution: not the world has mangrove growth mangrove concentrated distribution in the l tropical or subtropical coastal areas l l sea water temperature between 25 degrees north latitude and 25 degrees south latitude about 20 degrees Celsius or above the global mangrove can generally use the meridian to the line, divided into Oriental mangroves and mangrove forests in the West. Oriental mangrove range in the east coast of Africa, Indonesia, Southeast Asia, Australia and New Zealand region. Western mangroves are distributed in the Americas, the two sides and the west coast of Africa. If the species to the number of Oriental mangrove species than mangroves in the West more than about five times. The global number of species of mangrove l Global total of 14 families, families, 21 genera and genera and 61 species of mangrove species l recorded 26 species l was recorded eight species of l Tai O was recorded in six varieties

Adapt to the environment: how to overcome the instability of peatlands mangrove growth of rope-like root (Cable Root), such as Avicennia marina, increased root (Prop Root), such as K. candel, the root plate (Buttress, Root) ", such as silver Stella, the peatlands of the unstable roots can withstand the storms and erosion. (2) how to overcome the hypoxic state of mangrove trees by the roots of different development form, and a special ventilation part is called "lenticels (Lenticel)", the formation of a "breathing tube" function. Avicennia marina exposed soil ventilation rootlet "breathing roots", the root of the growth of wood Lam bend section on top was stretched out dirt, called geniculate root (Kneejoint) ", Kandelia candel stem president outlet root down students. Mangrove in addition to the ability to be able to overcome hypoxia, also rely on symbiotic biological species such as the mudskipper fish, fiddler crabs digging holes in the ground on the mudflats, as their residence, thus indirectly helping mudflats of oxygen to clear the airway. " How to overcome like halophytes in the lives of mangrove in the case of high salt, both by the accumulation of a proline (an amino acid) to "balance" penetration, can tolerate higher internal salt concentration. For example: candel, Aegiceras tree, to prevent the salt into the roots in the xylem, and able to function as a filter to prevent the salt delivered to the tissues; and pump principle, the excess salt discharge from the roots of exclusion of salt (Excluding the Salt) . This type of "salt exclusion" can be maintained very low salt content, 70 per cent of "non-salt exclusion". Excretion of salt (Salt Excretion): Avicennia marina Aegiceras, can continue within the organization salt through salt glands in the leaves of the Salt Glands excreted. Such as deciduous (Shedding of plant parts): candel, Bruguiera gymnorrhiza, Excoecaria agallocha, salt storage in the vacuole, or the formation of crystals fixed within the leaves, the leaves, salt will be together from the mother plant. (4) branching out of the viviparous phenomenon "phenomenon (vivipary) is one of the most striking features of mangroves grown hypocotyls of seeds in the fruit to mature embryo and fruit off on their own, and then insert the mud a long root, leaf. In the absence of seed germination required oxygen, and lack of fresh water, seeds easily washed away by the sea environment, viviparous seedlings directly from the mother plant to absorb nutrients, after falling to be mature, and the pen-like seedlings have to live to ooze , can not be successfully fixed may drift to suitable habitat and then put down roots. The Mangrove variety of the candel, Bruguiera gymnorrhiza and Aegiceras have "viviparous phenomenon.

The function of the mangrove: mangroves known as the patron saint of the coast, is a natural breakwater, is a natural fry sterile field, the source of the food chain. On the mudflats of the mangrove can muddy within the humus and minerals absorb more energy and biomass (nutrients) made on behalf of Habitat, through photosynthesis. Picks of shelter and shelter the mangroves for other biological habitats. (3) of mangroves to the habitats of the nutrients difficult to be swept away, so that more organisms can be the supply of nutrients. A variety of resident birds and migratory birds for fishing for a living to provide a feeding ground and habitat Example: Dew, gray exposed habitats is extremely rich in a variety of sizes seaweed-like organisms, is ideal juveniles cultivated places. the Pearl River Estuary fish juveniles to cultivate one of the sites. 7 is a variety of migratory birds of the Far East the middle of one of the "hotel", the wetlands of southern China is rapidly reduced, Lantau Island mangroves become more important. 

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