Joshian N.W. Schaduw

doi:10.35800/jasm.8.1.2020.32426

Authors

Joshian N.W. Schaduw Marine Science Study Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University (UNSRAT), Manado 95119

DOI:

https://doi.org/10.35800/jasm.8.1.2020.32426

Keywords:

mangrove, community structure, Batanta, Salawati, Raja Ampat

Abstract

The research aimed at monitoring the condition of mangrove communities in Batanta Island and Salawati Island, Raja Ampat District, West Papua Province. It used method developed by the Indonesian Institute of Sciences Research Center for Oceanography (P2O LIPI). Method in determining the percentage for the coverage of mangrove communities used a hemispherical photography and the data analysis used ImageJ software in excel tabulation. The result showed that mangrove canopy coverage has decreased from 85.73% in 2017 to 84.14% in 2018. Since the observations in 2015, the percentage of mangroves had no significant change. In average the percentage increased as much as 3.45% from 75.09% in 2015 to 78.54% in 2016. Moreover, it increased again by 7.20% in 2017 (85.73%). It indicates that the average change percentage of mangroves is not significant, and it can be concluded that the mangrove ecosystem in this area does not degrade significantly and has a good growth rate. The average density value was 1254.3 trees per hectare in the period of 2016-2018 or it increased to about 16.5% since 2015. The number of species found at the observation site were 5 species (Rhizophora mucronata, Rhizophora apiculata, Bruguiera gymnorrhiza, Sonneratia alba, and Xylocarpus granatum) scattered in eight observation stations. From these results it can be concluded that mangrove condition at the research location is stable and gets support for the survival of biota associated therein.

References

ABRAR, M., GIYANTO., SIRINGORINGO, R.M., EDRUS, I.N., ARBI, U.Y., SIHALOHO, H.F., SALATALOHI, A. and SUTIADI (2014) Laporan Monitoring (Baseline) Kesehatan Ekosistem Terumbu Karang dan Ekosistem Terkait Lainnya di Taman Wisata Perairan Pulau Pieh dan Sekitarnya, Sumatera Barat. Pusat Penelitian Oseanografi. Jakarta: Lembaga Ilmu Pengetahuan Indonesia.

AGUSTINI, N.T., TAâ€™ALADIN, Z. and PURNAMA, D. (2016) Struktur komunitas mangrove di Desa Kahyapu Pulau Enggano. Jurnal Enggano, 1 (1), pp.19-31.

ANDERSON, M.C. (1964) Studies of the woodland light climate: I. The photographic computation of light condition. Journal of Ecology, 52 (1), pp. 27-41.

DHARMAWAN, I.W.E. and PRAMUDJI (2014) Panduan Monitoring Status Ekosistem Mangrove. CRITC COREMAP-CTI. Pusat Penelitian Oseanografi. Jakarta: Lembaga Ilmu Pengetahuan Indonesia.

DJOHAR, M.A., BONEKA, F.B., SCHADUW, J. N.W., MANDAGI, S.V., ROEROE, K.A. and SUMILAT, D.A. (2020) Marine waste, analysis and abundance of gastropods in mangrove ecosystem Tongkaina, North Sulawesi. Jurnal Ilmiah Platax, 8 (1), pp. 15-23.

RAYMOND, G.P., HARAHAP, N. and SOEMARNO (2010) Pengelolaan hutan mangrove berbasis masyarakat di Kecamatan Gending, Probolinggo. Agritek, 18 (2), pp. 185-200.

SCHADUW, J.N.W. (2013) Small island mitigation based on mangrove ecosystem management in Bunaken National Park. Aquatic Science & Management, 1 (2), pp. 133-142.

SCHADUW, J.N.W. (2015a) Bioekologi mangrove daerah perlindungan laut berbasis masyarakat Desa Blongko Kecamatan Sinonsayang Kabupaten Minsel Provinsi Sulut. Jurnal LPPM UNSRAT Bidang Sains dan Teknologi, 2 (1), pp. 89-102.

SCHADUW, J.N.W. (2015b) Keberlanjutan pengelolaan ekosistem mangrove Pulau Mantehage, Kecamatan Wori, Kabupaten Minahasa Utara, Provinsi Sulawesi Utara. Jurnal LPPM UNSRAT Bidang Sains dan Teknologi, 2 (2), pp. 60-70.

SCHADUW, J.N.W. (2016a) Evaluasi pengelolaan ekosistem mangrove pada daerah perlindungan laut Desa Blongko Kecamatan Sinonsayang Kabupaten Minahasa Selatan Provinsi Sulawesi Utara. Jurnal Spasial, 16 (2), pp. 27-38.

SCHADUW, J.N.W. (2016b) Kondisi ekologi mangrove Pulau Bunaken Kota Manado Provinsi Sulawesi Utara. Jurnal LPPM UNSRAT Bidang Sains dan Teknologi, 3 (2), pp. 64-74.

SCHADUW, J.N.W. (2018a) Distribusi dan karakteristik kualitas perairan ekosistem mangrove Pulau Kecil Taman Nasional Bunaken. Majalah Geografi Indonesia, 32 (1), pp. 40-49.

SCHADUW, J.N.W. (2018b) Struktur komunitas dan keberlanjutan pengelolaan ekosistem mangrove pulau-pulau kecil (kasus pada Pulau Nain Kabupaten Minahasa Utara Provinsi Sulawesi Utara). Jurnal Ilmu Lingkungan, 16 (2), pp. 120-129.

SCHADUW, J.N.W. (2019) Struktur komunitas dan persentase penutupan kanopi mangrove Pulau Salawati Kabupaten Kepulauan Raja Ampat Provinsi Papua Barat. Majalah Geografi Indonesia, 33 (1), pp. 26-34.