Pembangunan dan perkembangan ekonomi di suatu perkotaan cenderung dapat meminimalkan ruang terbuka hijau (RTH) yang berdampak terganggunya keseimbangan ekosistem seperti: perubahan suhu, polusi udara, pencemaran air, permukaan tanah menurun dan bahaya banjir. Upaya dalam mengurangi dampak negatif tersebut dapat dilakukan dengan cara pembangunan atau pengembangan hutan kota dengan memilih jenis pohon potensial yang sesuai dengan tipe kawasan dan peruntukannya.
Regenerasi alami tanaman dipterokarpa di Hutan Cigerendeng adalah bentuk usaha tumbuhan menjaga kelangsungan hidup agar tidak mengalami kepunahan. Penelitian ini bertujuan untuk mengetahui populasi dan nilai ekonomi sediaan anakan dipterokarpa pada tingkat semai dan pancang. Metode penelitian yang digunakan adalah analisis vegetasi dengan plot berpetak ukuran 2x2 m untuk anakan semai dan 5x5 m untuk anakan pancang yang diletakkan pada 18 petak hutan. Data dianalisis untuk menghitung jumlah individu, jumlah jenis, kerapatan, frekwensi dan nilai penting (INP) serta potensi anakan. Selain itu dianalisis pula pola sebaran masing-masing jenis dipterokarpaceae. Nilai ekonomi anakan dihitung dengan pendekatan nilai rente ekonomi. Hasil analisis vegetasi menunjukkan bahwa di Hutan Cigerendeng terdapat 5 jenis anakan semai dan pancang (Hopea mengarawan Miq., Hopea odorata Korth., Hopea sangal Roxb., Shorea ovalis Bl., Shorea selanica Bl. dan tambahan 1 jenis anakan Hopea bancana tingkat pancang. Jenis anakan dominan yaitu Hopea mengarawan Miq. dengan kerapatan hingga 153.000 batang/ha dan INP (149,2) pada tingkat semai dan 6700 batang/ha dan INP (151,5) untuk tingkat pancang. Potensi anakan jenis dipterokarpa di Hutan Cigerendeng mencapai 1.085.166 batang untuk anakan tingkat semai dan 48.355 batang anakan tingkat pancang dengan total nilai ekonomi mencapai Rp. 166.360.000,-.
Trees naturally may contribute to climate change mitigation through photosynthesis process that absorbs carbon dioxide in the atmosphere and stored in their biomass. The amount of carbon stored in tree biomass depends on the size of tree, species, and population per area. This study aims to analyse the amount of carbon stored in Cigerendeng Research Forest (CRF), West Java that is managed by Forestry Research and Development Agency (FORDA). This forest is dominated by mahogany and dipterocarp species originally having been planted in Sumatera and Kalimantan starting from the 1930s. Species-specific allometric and general allometric are utilised to estimate the weight of the above ground biomass. Below ground biomass is estimated by allometric equation of Cairns et al (1997). The results of this study show that carbon stored in tree biomass of Cigerendeng Research Forest (CRF) in 2009 and 2015 were 156 and 199 ton per ha respectively, with relatively dominated by old trees. The growth of trees in the CRF area could store 43 ton per ha in 6 years (from 2009 to 2015). The CRF manager utilizes the CRF by selling its environmental services (i.e. amenity and carbon), instead of harvesting.
The existence of farmer’s groups is important for increasing community forest productivity. The final impact is the sustainability of the environment and the community’s welfare with the pattern of community forests. The purpose of the research is to find out the structure and dynamic of farmer groups for institutional strengthening. The research was conducted in Cipari Hamlet, Linggajaya Village, Cisitu Subdistrict, Sumedang Regency, from 2015 to 2017. The research used a qualitative approach and descriptive explanation of a case. Data collection was conducted by doing in-depth interviews with 3 (three) informants, and using questionnaires on 22 (twenty two) respondents who are members of the “Lingga Murni” forest farmer group. The result showed that the forest farmer group “Lingga Murni” was a modern group, as seen from the existence of an organizational structure (but there was no forestry section) and some institutional activities that have already left the sub-district. But the collection of decisions was not by deliberation but directly from the group leader. The Lingga Murni farmer group did not accommodate the opinions of all members. Alternative development agency priorities were the establishment of a forestry section in the organizational structure to accommodate community forest activities, as well as the creation of work plans with the aim of improving the performance of its members, from program design to evaluation of activities.
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