Local communities also have incentives to protect both terrestrial and mangrove forests as they realize the benefits of doing so. For example, a study demonstrates that the net benefits per annual from a collection of non-timber forest products (NTFP) in only certain parts of Mae Yom forest are as high as 122 million Baht. The net benefits have been calculated based on only 10 major NTFP collected by villagers, which did not include medicinal plants (Sathirathai, et al., 1998).