Semarang - KeSEMaTBLOG. Most people in Teluk Awur Jepara, Indonesia - many of whom work as woodcarvers and fishers - know little about how important mangroves are to their lives and their environment. They do not realize that mangroves stabilize the coasts and riverbanks. So they fell mangrove forests for firewood and other uses and, assuming the forests have no value, dump rubbish in them.