Judul: Restoration of Mangrove Forest in the Western Part of Rambut Island Wildlife Reserve, Seribu Island
Abstrak: Restorasi hutan mangrove adalah upaya untuk memulihkan kawasan yang mengalami kerusakan. Salah satu kawasan mangrove yang harus direstorasi adalah kawasan hutan mangrove di Suaka Margasatwa Pulau Rambut (SMPR). Hutan mangrove di SMPR memiliki luas sekitar 14,31 ha dengan lokasi penelitian seluas 2,14 ha di bagian barat SMPR. Penelitian ini bertujuan untuk memetakan lokasi dan luas hutan mangrove yang perlu direstorasi, menentukan jenis mangrove, dan teknik penanaman yang sesuai di areal restorasi. Analisis data diperoleh melalui analisis data vegetasi, kesesuaian jenis pohon dengan tempat tumbuh, dan teknik penanamannya. Berdasarkan hasil penelitian, areal yang memerlukan tindakan restorasi adalah 0,37 ha. Adapun jenis-jenis mangrove yang direkomendasikan adalah Bruguiera gymnorrhiza, Rhizophora mucronata, Rhizophora apiculata, Ceriops tagal, Ceriops decandra, Heritiera littoralis, dan Xylocarpus granatum di petak nomor 5, 13, 20, 28, 33, 50, 64, 65, 73; dan Avicennia alba, Avicennia officinalis, Rhizophora mucronata, Rhizophora stylosa, Rhizophora apiculata, dan Sonneratia alba di petak nomor 7. Teknik penanaman cemplongan dapat dilakukan di semua petak areal restorasi, kecuali di petak nomor 7 yang dilakukan dengan teknik penanaman bronjong., Mangrove forest restoration is an effort to restore damaged areas. One of the mangrove areas that must be restored is the mangrove forest area in the Rambut Island Wildlife Reserve (RIWR). RIWR's mangrove forest has an area of around 14,31 ha with a research location of 2,14 ha in the western RIWR. This study aims to map the location and area of mangrove forests that need to be restored, determine the type of mangrove, and the suitable planting technique in the restoration area. Data analysis was carried out by vegetation analysis the location that needed to be restored, species-site matching, and the planting technique. Based on the results, the area requiring restoration measures is around 0,37 ha. The recommended mangrove species are Bruguiera gymnorrhiza, Rhizophora mucronata, Rhizophora apiculata, Ceriops tagal, Ceriops decandra, Heritiera littoralis, and Xylocarpus granatum in plots number 5, 13, 20, 28, 33, 50, 64, 65, 73; and Avicennia alba, Avicennia officinalis, Rhizophora mucronata, Rhizophora stylosa, Rhizophora apiculata, and Sonneratia alba in plot number 7. The planting technique that can be applied to all restoration plots is the cemplongan technique, except plot number 7 is the bronjong technique.
Keyword: mangrove forest, planting technique, Rambut Island, restoration

Judul: Species Composition and Vegetation Structure of Mangrove Forest in Pulau Rambut Wildlife Reserve, Kepulauan Seribu, DKI Jakarta
Abstrak: Hutan mangrove di Suaka Margasatwa Pulau Rambut memiliki keanekaragaman hayati yang tinggi sehingga diperlukan penelitian mengenai komposisi jenis dan struktur vegetasi. Penelitian ini bertujuan untuk mengkaji komposisi jenis dan struktur vegetasi hutan mangrove di Suaka Margasatwa Pulau Rambut. Analisis vegetasi dilakukan dengan metode jalur dan garis berpetak dengan luasan plot contoh 8000 m2 dan berjumlah 8 jalur masing-masing dengan ukuran 10m x 100 m. Hasil penelitian menunjukkan bahwa hutan mangrove Suaka Margasatwa Pulau Rambut memiliki 9 jenis dari 5 famili dan didominasi oleh famili Rhizophoraceae. Jenis Rhizophora mucronata mendominasi pada tingkat pertumbuhan pohon dan semai. Jenis Ceriops tagal mendominasi pada tingkat pertumbuhan pancang. Nilai keanekaragaman, kekayaan, dan dominansi di hutan mangrove Suaka Margasatwa Pulau Rambut pada berbagai tingkat pertumbuhan tergolong rendah, namun nilai kemerataan jenisnya tergolong tinggi. Proporsi jumlah pohon dan permudaan membentuk kurva “J” terbalik. Stratifikasi tajuk pada hutan mangrove SM Pulau Rambut hanya mencapai stratum C (4-20 m)., Mangrove forest in Pulau Rambut Wildlife Reserve has high biodiversity, so research is needed on species composition and vegetation structure. This study aims to examine the composition of the type and structure of mangrove forest vegetation in the Pulau Rambut Wildlife Reserve. Vegetation analysis was carried out using the strip and line method with a sample plot area of 8000 m2 and a total of 8 lanes each with a size of 10 m x 100 m. The results showed that the mangrove forest of Pulau Rambut Wildlife Reserve has 9 species from 5 families and is dominated by the Rhizophoraceae family. The type of Rhizophora mucronata dominates the growth rate of trees and seedlings. The type of Ceriops tagal dominated the sapling growth rate. The value of diversity, richness, and dominance in the mangrove forest of the Pulau Rambut Wildlife Reserve at various growth rates is low, but the value of species evenness is high. The proportions of the number of trees and regeneration form an inverted “J” curve. The canopy stratification in the mangrove forest of Pulau Rambut Wildlife Reserve only reached stratum C (4-20 m).
Keyword: mangrove forest, Rambut Island, species composition, vegetation structure

Judul: Asymptotic Distribution of Estimator for the Intensity Function of a Doubly Periodic Poisson Process
Abstrak: In this manuscript, estimation of the intensity function of a doubly periodic Poisson process is discussed. It is assumed that only a single realization of the Poisson process is observed in a bounded window [0,n]. It is also assumed that the period of the intensity function is known. The rate of consistency and asymptotic normality of the estimator are formulated. Finally, a confidence interval for the local intensity function is also formulated.
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