Analysis Diversity of Mangrove Plants and Brachyura (Uca Crab) at Yagasu Belawan Forest

Mangrove is one of the ecosystems that need to be protected and conserved. If mangrove ecosystem is destroyed or damaged it will have a bad impact for the economy of people who live on the coast or mangrove waters. Uca Crab (Uca sp.) Itself is a small crab species that has a very important role in the balance of energy flows in the mangrove ecosystem. Uca Crabs also have many different genera and species. In the food chain, Uca Crab is the lowest consumer and detrivus in the food chain of mangrove ecosystems. For fishermen whose main livelihood is to sail and farmers of mangrove ponds of course the mangrove ecosystem is the main support that supports the livelihood. In relation to student lecture materials Such as the subject of Low Animals Taxonomy, animal ecology, plant ecology, and high plant taxonomy, it is necessary to have a direct study of the spaciousness which is the learning resource for the students. However, although this study is said to have great potential but is still limited to the ability, both financial and procedural abilities. Because this research is limited to Mangrove Yagasu Bagan Deli, District of Belawan Medan Fisherman Village With the potential of 23 Ha of Yagasu Forest selected as the location of the research object because of the unspoiled condition, protected, and positioned right on the expanse of the river mouth and the border with the east coast of Sumatra.