Developing Payment for Ecosystem Services Scheme on Pari Island Kepulauan Seribu Nurul Hidayati, Mahawan Karuniasa, Mufti Petala Patria and M. Suparmoko E3S Web Conf., 68 (2018) 02010 Published online: 27 November 2018 DOI: 10.1051/e3sconf/20186802010