The bark of the black mangrove has been used in the process of tanning animal skins and as a black dye. The leaves, which excrete salt crystals, have been gathered as a source of salt by indigenous people. Black mangrove flowers are also an important source of "mangrove honey."
Not only do grasslands have a local importance for the maintenance of biodiversity and food production, but they also affect ecological processes at landscape (e.g., pollination), regional (e.g., water regulation, recreation), and global scales (e.g., climate regulation)
A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate. Every dune has a windward side and a slipface.