Abstract
North Mollucas is the main of priority areas for global biodiversity. Not the entire beach in the Galela district be created nesting ground by birds of Mamoa. This is caused to existence of the key factors that the criteria for site selection, for example physical structure, safe location, and flanked by two barriers. The purpose of this study was to investigate the characteristics of nesting ground, vegetation composition and study the physical structure of the nesting grounds in the Galela district. Primary data were collected ; field characteristics of nesting ground, dimension and pattern layout eggs hatch hole, soil physical and chemical (temperature, moisture, aeration, pH, and organic matter content). To examine the relationship between temperature with depth, with a humidity range of the highest tides, used of simple regression analysis. Vegetation analysis conducted qualitative description by calculating the parameters of vegetation and Important Values. The method used for vegetation data are squares method designed in the form of a belt in a transect (bisect). The results showed that Mamoa birds make nests hatch for protection and convenience for cheepers. The temperature, moisture, aeration, the distance between the nest, the nest distance between the highest and the content of organic matter, is not a key factor in the site selection by the parents, but the determining factor in the process of egg incubation. The composition of the vegetation found on the beach Mamuya consists of 22 species, 13 species on Tiabo beach, and 17 species on the beach of Denamabobane. Stratification vegetation of tree level is dominated by Terminalia cattapa, and Hibiscus tiliaceus. At the level of the pole is Calothropis gigantera Dryand, Avicenia Sp., Caesalpinia bonduc, Terminalia cattapa, and Mangifera indica. At stake level is Terminalia cattapa, Scaevolia tacada, Rhizopora appiculata, Citrus aurantifolia and Mangifera indica. At the level of the shrubs is Bruguiera gymnorrhiza Lamk, Scaevolia taccada, Ficus septica, Anona muricata, and Morinda citrifolia, and undergrowth is Hypolitrium, Ipomea pescaprae, Phaseolus lunatus, Phaseolus foetida and Andropogon acciculatus Ritz. Keywords: Galela district, Mamoa birds, nesting ground, strategy, selection
Highlights
Maluku Utara merupakan daerah prioritas bagi konservasi, secara global merupakan daerah prioritas utama bagi biodiversitas
Not the entire beach in the Galela district be created nesting ground by birds of Mamoa. This is caused to existence of the key factors that the criteria for site selection, for example physical structure, safe location, and flanked by two barriers
The results showed that Mamoa birds make nests hatch for protection and convenience for cheepers
Summary
Maluku Utara merupakan daerah prioritas bagi konservasi, secara global merupakan daerah prioritas utama bagi biodiversitas. Pulau Halmahera merupakan salah satu pulau terbesar di Maluku Utara dan sebagai pulau utama yang mencakup bagian terbesar hidupan liar, dengan 210 jenis burung. Bagian Utara Pulau Halmahera, Kecamatan Galela merupakan daerah populasi terbesar bagi burung mamoa. Daerah pantai yang ada di kecamatan Galela tidak semuanya dijadikan sebagai lokasi bertelur dan pengeraman oleh burung mamoa. Temperatur tanah diukur pada berbagai kedalaman dengan interval 10 cm, dan pengukurannya dilakukan di sekitar telur yang diletakkan. Dimensi (diameter dan kedalaman) sarang pengeraman diukur pada tiga tempat bertelur. Diukur pula ketebalan timbunan dari atas telur sampai permukaan timbunan, serta pengukuran jarak terdekat antar sarang untuk memprediksi sifat teritorial burung mamoa dalam bersarang. Pola atau tata letak lubang pengeraman telur dipelajari dengan melihat pelindung yang ada hubungannya dengan vegetasi, pemaparan oleh sinar matahari, keamanan dari predator dan kemudahan penggalian. Pengambilan data vegetasi dengan menggunakan metode plot bersarang, seperti yang ditunjukkan pada Gambar 1
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