✔ 最佳答案
所謂紅樹林(Mangrove),是指生長在熱帶海灣或河口淤泥上屬紅樹科的喬木或灌木所組成。紅樹林是發育在特殊生境條件下的植物,在漲潮時,僅見海面上的樹冠部分,而在退潮時,露出樹干以及特殊適應的支柱根。由於生境特殊,它們必須克服不穩定的泥沼地、缺氧和高鹽量三大難題。
紅樹的另一個特徵是樹幹基部有很多縱橫交錯的支柱根。
這些支柱根一方面支撐著紅樹植楺在鬆軟的泥沼上生長;另一方面也因其伸出水面,可起到氣根的作用,吸取空氣中的氣體,
促進植物體內的氣體交換。
紅樹林是一種良好的海岸防護林,可以保護沿岸堤圍,防止海浪衝擊。
此外,紅樹林在河口地區可促淤造陸,為人類提供肥沃土地方面有一定意義。
香港位於亞熱帶地區,接近世界紅樹林生長的最北極限,所以其紅樹品種和高度有限。
在港最容易辨認的紅樹品種有六種,包括:秋茄、老鼠、桐花樹、白骨壤、木欖和海漆:
Mangrove, is the growth in the Gulf or tropical estuary mud on the branches of mangrove trees or shrubs formed. Mangrove is the development of special habitat conditions, the plants, in chatter, only see the crown on the sea, When the tide is in, exposing trunks and special adaptation of the pillars of roots. As habitats are special, they must overcome the quagmire of instability, low oxygen and high salinity three major problems. Another characteristic of a mangrove tree is the base of many interlocking root of the pillars. While these pillars supporting the roots of mangrove planting in soft Rou starting on growth; Because of the other extended surface. the roots may play a role, drawing on gas in the air, the plants for gas exchange. Mangrove is a good coastal shelterbelt, and can protect the coastal embankment to prevent the impact of the waves. In addition, Mangrove in the mouth can promote deposition was made to provide mankind with fertile land to a certain extent and significance. Hong Kong is located at the sub-tropical region, close to the World Mangrove Growth of the North Limit, So its mangrove species and highly limited. In Hong Kong the most easily identifiable with six mangrove species, including : Kandelia candel, rodents, Avicennia marina, Avicennia marina, olive trees and the sea section.