Dede Setiadi

Succession on tin-mined land in Bangka Island

A quantitative study of floristic composition and vegetation structure was conducted at Bangka Island, Indonesia. Six different vegetation types were chosen, riparian forest, abandoned farmland, and natural regeneration of tin-mined lands of different ages: 0 and barren, 7, 11 and 38 years’ old tin-mined land. The seedling composition of the oldest tin-mined land was less than 2 % similar to that of a riparian forest. Natural regeneration on 7-year old tin-mined land began with herb species belonging to Cyperaceae, Poaceae, and Melastomaceae; followed by herb species belonging to Asteraceae and Poaceae on 11-year old; then by Poaceae and shrub species of Myrtaceae on 38-year old tin-mined land. Older tin-mined land tended to have less sand, higher nutrients and cation-exchange capacity. The phosphate solubilizing bacteria showed a gradual increase along with the more newly abandoned tin-mined land but decreased in barren tin-mined land, while the number of arbuscular mycorrhizal fungal spores showed the opposite.

Kajian Pemilihan Jenis Tumbuhan Untuk Restorasi Hutan Berdasarkan Beberapa Parameter Fotosintesis

Forest restoration is a process of ecosystem conditioning (soil, vegetation, and wildlife) in order to achieve similar patterns and profiles to previous conditions and status before the ecosystem was disturbed, both in terms of species composition and structure, and habitat functions. Restoration is a crucial part to maximize the conservation values of biodiversity and ecosystem functions. Eight different native plant species were assessed in this research while the photosynthetic parameters studied included the total chlorophyll content, carbohydrate content, CO2 sequestration capacity, leaf weight, leaf number, leaf area and leaf water content. Spectrophotometer was operated to analyse chlorophyll content, the Somogyi-Nelson method was used to calculate carbohydrate content, and leaf area was measured using the leaf area meter. The research results using the principal component analysis showed that each type of the plant species used for the restoration (2 years old after planting) had different characteristics in terms of photosynthetic parameters studied. Dacrycarpus imbricatus and Syzygium lineatum both had the highest carbohydrate contents and the best abilities to absorb CO2. Sloanea sigun, Alstonia scholaris, Manglietia glauca, and Castanopsis argentea had higher total chlorophyll contents than others, while Altingia excelsa, M. glauca, A. scholaris, and Schima wallichii had higher water contents. A. scholaris, M. glauca, and S. sigun had heavier leaf weights. In contrast, M. glauca possessed the widest leaves amongst the species observed. Keywords: forest restoration, photosynthetic parameters, native species

Pengetahuan Fauna (Etnozoologi) Masyarakat Tengger di Bromo Tengger Semeru Jawa Timur

Penelitian ini bertujuan mempelajari pengetahuan tentang pemanfaatan hewan berpotensi, pelestarian lingkungan oleh masyarakat Tengger. Mempelajari interaksi antara masyarakat dan lingkungannya dan aspek praktek, persepsi serta representasinya. Metode penelitian digunakan survei exploratif meliputi inventarisasi jenis hewan di kandang, lingkungan rumah, wilayah konservasi hutan Taman Nasional Bromo Tengger Semeru (TN.BTS) meliputi nama lokal dan nama ilmiah. Metode dengan teknik ethnodirect, sampling meliputi wawancara langsung, semistruktural terhadap penduduk, pemangku adat, dukun serta pengumpulan informasi dengan pendekatan bersifat partisipasif (participatory ethnobotanical appraisal, PEA). Jenis hewan peliharaan mempunyai nilai ekonomi dapat dipergunakan sumber bahan pangan bagi masyarakat Tengger. Pengetahuan keanekaragaman satwa liar dan binatang yang dimanfaatkan masyarakat Tengger meliputi 110 jenis, hanya sekitar 6% saja yang sering digunakan dalam kehidupan sehari-hari rumah tangganya, diantaranya adalah untuk bahan pangan, ritual, obat-obatan, dan lain-lainnya.