Soil as a Factor Influencing the Mangrove Forest Communities in Talidendang Besar, Riau

One transect of 10 m x 900 m was constructed perpendicular to the sea edge to know the pattern ofmangrove forest communities from the sea edge through the inland area. Then, one sample plot of 50 m x 50 mwas established at each forest community to explore its vegetation structure and soil characteristics. The results show that in Talidendang Besar area, there are three mangrove forest communities stretchingfrom the sea edge to the inland, namely Bruguiera parviflora, B. sexangula and B. sexangula-Nypa fruticans.The soil factors such as pH.EC (electrical conductivity), % K, % Na, C-organic, N-total, NH4 (ammonia), andCEC (cation exchange capacity) were regarded important in influencing the pattern of the mangrove forestcommunities

Keanekaragaman Hayati Flora Di Indonesia

Indonesia merupakan negara kepuluauan seluas sekitar 9 juta km2 yang terletak diantara dua samudra dan dua benua dengan jumlah pulau sekitar 17.500 buah yang panjang garis pantainya sekitar 95.181 km. Kondisi geografis tersebut menyebabkan negara Indonesia menjadi suatu negara megabiodiversitas walaupun luasnya hanya sekitar 1,3% dari luas bumi. Dalam dunia tumbuhan, flora di wilayah Indonesia termasuk bagian dari flora dari Malesiana yang diperkirakan memiliki sekitar 25% dari spesies tumbuhan berbunga yang ada di dunia yang menempati urutan negara terbesar ketujuh dengan jumlah spesies mencapai 20.000 spesies, 40%-nya merupakan tumbuhan endemik atau asli Indonesia. Negara Indonesia termasuk negara dengan tingkat keterancaman dan kepunahan spesies tumbuhan tertinggi di dunia. Saat ini tercatat sekitar 240 spesies tanaman dinyatakan langka, diantaranya banyak yang merupakan spesies tanaman budidaya. Selain itu, sekitar 36 spesies pohon di Indonesia dinyatakan terancam punah, termasuk kayu ulin di Kalimantan Selatan, sawo kecik di Jawa Timur, Bali Barat, dan Sumbawa, kayu hitam di Sulawesi, dan kayu pandak di Jawa serta ada sekitar 58 spesies tumbuhan yang berstatus dilindungi

Litter Decomposition Rate of Avicennia Marina and Rhizophora Apiculata in Pulau Dua Nature Reserve, Banten

Litter decomposition rate is useful method to determine forest fertility level. The aims of this study were to measure decomposition rate, and analyze the nutrient content released organic carbon, nitrogen, and phosphor from Avicennia marina and Rhizophora apiculata litters during the decomposition process. The research was conducted in the Pulau Dua Nature Reserve, Serang-Banten on A. marina and R. apiculata forest communities. Litter decomposition rate measurements performed in the field. Litter that has been obtained with the trap system is inserted into litter bag and than tied to the roots or trees to avoid drifting sea water. Litter decomposition rate was measured every 15 days and is accompanied by analysis of the content of organic C , total N and P. Our research results showed decomposition rate of A. marina (k= 0.83) was higher than that of R. apiculata (k= 0.41). Differences of leaf anatomical structure and sea water salinity influenced to the rate of litter decomposition. Organic C released was declined with longer of litter decomposition, on the contrary of releasing N and P nutrients

Analisis Kelembagaan Pengelolaan Daerah Penyangga Taman Nasional Kerinci Seblat: Studi Kasus Di Eks Hph PT Maju Jaya Raya Timber Kabupaten Bengkulu Utara Provinsi Bengkulu

Ex concession of PT Maju Jaya Raya Timber (PT MJRT) is located at North Bengkulu Regency, Bengkulu Province is an important buffer zone of Kerinci Seblat National Park (KSNP). Therefore the damage that happened in that area will have a huge impact in the on-going development of the reservation area. The purpose of this research is to design alternative policies to manage the buffer zone of KSNP. The analytical methods used are the Analytical Hierarchy Process (AHP) and SWOT analysis method are both used to design an alternative policies management. The result of this research showed that there have been changes in land cover, virgin forest only about 30%, and the rest was logged over area and has been converted to field crops owned by the locals and private company. This indicates that the management of ex-concession is not good enough. Based on Analytical Hierarchy Process and SWOT analysis, the prioritize function on the management of the area mentioned has be increasing to income of the locals, therefore this could decrease the pressure of the locals to take advantage in using the forest area. Some alternatives of policies which can be carried out is to strengthen property rights, developed local institution, developed the pattern of agroforestry and to upgrade the human resources by increasing the economic productivity for proper management of KSNP buffer zone

Kelayakan Rehabilitasi Mangrove Dengan Teknik Guludan Dalam Perspektif Perdagangan Karbon Di Kawasan Hijau Lindung Muara Angke, Provinsi DKI Jakarta

Mitigation of climate change due to CO2 emissions, the forestry sector developed a REDD+ scheme. This study was conducted to examine financial feasibility of the mangrove rehabilitation with guludan technique, so that further funding of mangrove rehabilitation can be included into REDD+ scheme. Guludan technology was developed to overcome the deep water column for mangrove rehabilitation in the former pond area. This technique has been developed for mangrove species Avicennia marina with spacing 0.25 m x 0.25 m, 0.5 m x 0.5 m, and 1 m x 1 m. Based on diameter and height growth of 36 months planted seedlings of A.marina followed logistic model. CO2 sequestration 386.34 t/ha, 131.12 t/ha, and 26.75 t/ha in 0.25 m x 0.25 m, 0.5 m x 0.5 m, and 1 m x 1 m spacing. With CO2 sequestration selling price of €20,00/t CO2 and rehabilitated land area of 10 ha, this rehabilitation action using guludan technique is not financially feasible, because the criteria for a negative NPV, Net B/C< 1, and IRR < the investment rate, which is 12%. The alternative for this is by implementing material efficiency and increasing carbon selling price as much €54.5/t CO2 for the spacing 0.25 m x 0.25 m; €122/t CO2 for the spacing 0.5 m x 0.5 m; and €580/t CO2 for the spacing 1 m x 1 m

This Research Aimed to Study Status of Arbuscular Mycrorrhizal Fungus (AMF) in Mangrove and Coastal Forest Post-tsunami Disaster, and to Study the Relationship of Soil Phosphorus Content and Number of AMF Spores and AMF Infection of Mangrove and Coastal Forest Post Tsunami Disaster. Research Results Show That There Were Variability in Spore Numbers in the Field Studied. the Spore Numbers in Mangrove Forest Were Found as 359, 235, 118 and 160 Spores Per 50 G of Soil in Meulaboh, Banda Aceh, Pidie and Nias Respectively. Meanwhile, in Coastal Forest Were 587, 297, 265 and 158 Spores Per 50 G in Meulaboh, Banda Aceh, Pidie and Nias Respectively. the Root of Rhizophora SP. and Casuarina Equisetifolia Were Colonized by AMF Both in Mangrove and Coastal Forest. Number of Spores Were Negatively Correlated to Soil Phosphorus Content, However, There Were Tendency of Positive Correlation Between Root Infection and Soil Phosphorus Content. Key Words: Coastal Forest, Mangrove Forest, Mycorrhiza

This research aimed to study status of arbuscular mycrorrhizal fungus (AMF) in mangrove and coastal forest post-tsunami disaster, and to study the relationship of soil phosphorus content and number of AMF spores and AMF infection of mangrove and coastal forest post tsunami disaster. Research results show that there were variability in spore numbers in the field studied. The spore numbers in mangrove forest were found as 359, 235, 118 and 160 spores per 50 g of soil in Meulaboh, Banda Aceh, Pidie and Nias respectively. Meanwhile, in coastal forest were 587, 297, 265 and 158 spores per 50 g in Meulaboh, Banda Aceh, Pidie and Nias respectively. The root of Rhizophora sp. and Casuarina equisetifolia were colonized by AMF both in mangrove and coastal forest. Number of spores were negatively correlated to soil phosphorus content, however, there were tendency of positive correlation between root infection and soil phosphorus content

Perubahan Penggunaan Lahan dan Kelestarian Produksi Pltaway Besai di Provinsi Lampung

Alih guna lahan hutan menjadi sistem penggunaan lainnya akan menimbulkan masalah terhadap suplaiair sebagai fungsi penyedia jasa lingkungan secara kuantitas maupun kualitas Skenario Perubahanpenggunaan lahan juga dikuantifikasikan untuk mengetahui komposisi penggunaan lahan di Sumberjayayang memberikan pendapatan maksimum bagi Pembangkit Listrik Tenaga Air (PLTA). Total PLTA diKecamatan Sumberjaya, Kabupaten Lampung Barat, Provinsi Lampung dipengaruhi oleh komposisipenggunaan lahan. Simulasi didasarkan pada skenario Perubahan penggunaan lahan (skenario 1: 13%monokultur; skenario 2: 61% agroforestri berbasis kopi; skenario 3: 23% hutan; skenario 4: 30% hutandan skenario 5: 84% hutan) untuk memprediksi total pendapatan PLTA yang berkelanjutan. Hasilpenelitian menunjukkan bahwa total pendapatan PLTA yang memberikan keberlanjutan terjadi ketika61% total area ditutupi oleh agroforestry berbasis kopi dan total pendapatan terendah terjadi ketika totalareal ditutupi 84% hutan. Sebaliknya penghutanan seluruh areal di Kecamatan Sumberjaya kecuali lahanpadi, hortikultur dan Perumahan akan menurunkan total pendapatan PLTAsebesar 13,5%