The mangrove ecosystem has functions that important for econimic and ecology. Increased utilization activities that are damaging accompanied decline mangrove area, it is appropriate rehabilitaion condition and maintenance mangrove ecosystem. Improvement effort rehabilitation mangrove ecosystem. The aim mangrove rehabilitation effort for restore ecosystem. Study aimed to determine the extent of damage level, area suitability biophysical and mangrove specieses planted. The survey method used measurement directly to determine the damage level and area suitability biophysical assesment. The Results showed mangrove ecosystem destruction overall research stations are medium damaged condition. Analysis suitability index (IKW) showed that mangrove ecosystem overall stations were suitable rehabilitation area. The mangrove specieses are Rhizophora sp, Bruguiera sp, Sonneratia sp, Xylocarpus sp, Scyphiphora hydrophyllacea and Heritiera littoralis sustable to planting.

Mangrove is an ecosystem that is a habitat for various both aquatic and terrestrial biota. This research aims at revealing the distribution and community structure of mangrove in Donrotu, Guratu and Manomadehe Islands, West Halmahera Regency, North Maluku. This work was conducted from April to June 2019. Data collection using the spot check method, while the analysis of mangrove distribution was carried out qualitatively. Community structures quantitatively include type density (Di), relative density types (RDi), frequency types (Fi), relative frequency types (Rfi), closing types (Ci), closure of relatively types (RCi), and Important value (VIi). The results showed that Rhizophora stylosa in the three islands (Donrotu, Guratu, and Idamdehe) had the highest species density and highest density values. Closing types and closures are relatively varied. The type of R. stylosa also has a higher importance in all three islands. The highest mangrove density was mainly found in Donrotu Island (0.96 ind/m2), then Guratu Island (0.46 ind/m2), and Idamadehe Island (0.32 ind/m2), respectively.

Tujuan penelitian adalah untuk menganalisis asosiasi dan relung mikrohabitat gastropoda pada ekosistem hutan mangrove di Pulau Sibu Kecamatan Oba Utara Kota Tidore Kepulauan Provinsi Maluku Utara. Pengambilan sampel dilakukan pada saat air surut dengan menggunakan metode line transect. Hasil penelitian diperoleh komposisi jenis-jenis gastropoda di Pulau Donrotu sebanyak 12 jenis yaitu Littrorina scabra, Littorina undulata, Turbo agryrostoma, Turbo chrysostoma, Turbo breneus, Nerita costata, Nerita planospira, Strombus luhuanus,, Cerithiidea cingulata, Telescopium telescopium, Telebralia sulcata dan Terebralia palustris. Pasangan jenis gastropoda yang diperoleh memiliki tipe asosiasi positif sebanyak 14 pasangan, asosiasi negatif sebanyak 11 pasangan  dan tidak ada asosiasi sebanyak 42 pasangan. Jenis gastropoda yang mempunyai relung habitat terlebar adalah Terebralia sulcata dan tersempit adalah Turbo chrysostomus.

The shellfish craft business is not only profitable for business actors, but also provides other benefits, including opening up employment opportunities for the community, increasing community creativity due to growing market demand and maintaining the product as a quality work of art. The output targets are household equipment (tissue boxes), interior accessories (wind chimes, door/window curtains) and souvenirs (key chains, brooches). Implementation methods include counseling, demonstration, training and coaching in the development of shellfish waste as a business opportunity. The training activity was successful because the enthusiasm of the participants was so great in pursuing the art of shellfish craft. Various forms of products and models produced are very varied. The products produced are tissue boxes, wind chimes, door/window curtains, key chains and brooches. The formation of a craft group “Creative Kastil” in the context of the sustainability of training activities.

Pola sebaran spesies-spesies moluska di hutan mangrove menunjukkan adanya suatu zonasi. Moluska mangrove dapat dibagi ke dalam tiga kelompok, yaitu: moluska pengunjung, fakultatif dan asli. Tujuan penelitian ini adalah mengkaji distribusi vertikal moluska dan keanekaragaman jenis, dominansi jenis, kemerataan jenis dan kesaman komunitas moluska hutan mangrove di Gugusan Pulau Sidangoli Kabupaten Halmahera Barat. Pengambilan moluska  menggunakan metode transek kuadrat. Transek ditarik secara horizontal sejajar garis pantai berdasarkan zonasi hutan mangrove yaitu zona bagian depan (ZBD), zona bagian tengah (ZBT) dan zona bagian belakang (ZBB). Hasil penelitian diperoleh distribusi vertikal moluska pada Zonasi Bagian Depan (ZBD) memiliki keanekaragaman jenis moluska lebih tinggi dan terendah di Zona Bagian Belakang (ZBB). Struktur komunitas moluska untuk semua stasiun penelitian memiliki keanekaragaman jenis tergolong sedang, tidak ada jenis yang dominasi dan penyebaran jenis moluska sangat merata.