Introduction In the mini group project, I focused on the “mangrove” part. I would like to do an in-depth study on the adaptations and ecological values ​​of the mangrove. Furthermore, I will mention the conservation of these precious mangrove habitats by different stakeholders. Of the 110 recognized mangrove plant species, approximately 8 "true mangrove" species are found in Hong Kong. They form mangroves which are a unique wetland ecosystem. Mangrove plants are distributed throughout tropical and subtropical regions and are commonly found in brackish waters that include intertidal river estuaries and sheltered coastlines. In addition to the high salinity of the water, the substrate is unstable due to tidal movement, which makes it difficult for plants to establish. They also have to deal with the anaerobic condition when their roots are submerged during high tide, as well as the dry, hot environment when the soil is exposed to air and sun during low tide. To adapt to this special environment, all these plants develop different structures and physiological mechanisms. Mangroves are widely distributed in the northwestern New Territories, Sai Kung, Tolo Harbor and along the coast of Lantau Island. The largest mangrove area in Hong Kong is the Mei Po Inner Deer Bay Ramsar site. Mangrove adaptations1. Salinity stress Soil salinity is high due to long exposure to seawater. This affects plant growth.1.1 Salt glandsSalt is excreted through salt glands on the leaf surface.1.2 Salt accumulationSalt is accumulated and stored in old leaves and is removed once the leaves fall.1.3 Exclusion of saktSalt is excluded and is prevented from entering the root by an active pump mechanism2.Unstable substrateDue to the......half of the paper......and reduces water pollution. Through microorganism metabolism, soil surface absorption, chemical sedimentation and plant digestion, the amount of suspended particles, elements including nitrogen and phosphorus, metals and chemical oxygen demand in water can be reduced. Mangrove ConservationGovernment1. Avoid land reclamation and infrastructure development near mangrove habitat.2. Promote public awareness, such as developing educational programmes, encouraging scientific research and study tripsPoints on 'do's' and 'don'ts' when viewing mangroves1. Avoid trampling on the roots of mangrove plants and their seedlings.2. Do not dig the sand and mud.3. Do not disturb wildlife and do not harvest mangrove plants In conclusion, we must do our best to enhance and protect mangroves, so that we can continue to use these valuable wetland resources.