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Can make use of the photosynthesis and raise one and oxygen for the animals and plants supply in the ecosystem to keep in the right ecological balance mangrove; It link mangrove it land ground and marine ecosystem,it and maintain neighbouring ecosystem the getting more important quite to stabilizing (for example: Each hectare mangrove can be brought up up to 12 metric tons of living beings, including insect , reptiles , amphibian animal , birds , invertebrate animal and many kinds of aquatic microorganism. )The wild and biological one has looked for food and offered abundant food resources in the cache mangrove, the mangrove plant one can be offered to the sanctuary for some animals or avoid the abominable weather condition influencing. A lot of animals will utilize the mangrove to tide over whole or some life cycles (LifeCycle ), for example: The base encloses the shrimp (Penaeussp , Metapaneussp. ),Some sparrows bird assortment often looks for the food in the mangrove, the most general with aquatic birds , such as egret ,etc. in the middle, they pray on aquatic living beings , such as fish , shrimp , crab , worm ,etc. mainly, so the mangrove becomes their ideal habitat. Reduce the mangrove assortment of water pollution and absorb the inorganic matter in water making use of their root system, reduce water pollution, for example metabolism of microorganism,, earth surface absorb, chemistry Shen settles and absorbed etc. by the plant. Elements , such as suspended substance , chemical oxygen demand , nitrogen phosphorus that this kind of method can be reduced in water ,etc. and metal ,etc..