Judul: Kajian Potensi dan Ancaman Kepunahan Kulim (Scorodocarpus borneensis Becc.) Pada Hutan Alam di Propinsi Riau
Abstrak: Kulim merupakan bahan baku yang potensial digunakan untuk berbagai macam kebutuhan, salah satunya sebagai bahan bangunan khususnya kusen pintu dan sejenisnya, dan bahan baku kapal kayu khususnya pada bagian dinding/palka kapal, lunas dan tiang As. Penelitian ini berlujuan untuk menyetaliui kajian potensi dan ancalnari kepunahan ku lim ditinjau dari tingkat pemanfaatannya pada hutan alam di Propinsi Riau. Penelitian ini dilakukan di dua IHPN, yaitu HPH Rokan Permai Timber dan NPH Kulim Company. Kedua lokasi tersebut dapat dijadikan sebayai gambaran kondisi populasi kulim di Riau secara keseluruhan. Disamping itu untuk mengambil sampel aspek pcmanfaatan dilakukan di Bagan Siapi-api (galangan kapal kayu) dan Kodya Pekanbaru (kusen pintu dan sejenisnya). Penelitian ini dilakukatl mulai pada bulan September sampai Nopember 1999. Data yang dikumpulkan antara lain adalah data tentang luas hutan Propinsi Riau yang diambil dari studi literatur, data potensi kulim, struklur tegakan, habitat dan penycbaran kulim melalui pengarnatal) langsong dilapangan dengan cara membuat plot contoh 100 ha, jumlah petak ukur yang dibuat dengan ukuran 20x20 m sebanyak 2500 PU. Data yang diambil adalah jumlah populasi kulim mulai dari tingkat sernai, pancang, tiang dan pohon, dan dihitung secara sensus. Sedangkan data pemanfaatan kulim diambil melalui wawancara dengan pihak-pihak perusahaan, baik pada perusahaan galangan kapal maupun industri pengetaman kayu khusus kusen. Data-data tersebut kemudian ditabulasikan dan dianalisis secara dcskriptif, kemudian dikatagorikan kedalam katagori keterancaman biota IUCN 1994. Data penyebaran kuliln diolah dengan menggunakan lndek Morisita.
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Judul: Kajian Permudaan Tumbuhan Langka Kulim (Scorodocarpus borneensis Becc.) dan Komposisi Vegetasi Pohon Sekitarnya di Taman Nasional Tesso Nilo, Riau
Abstrak: Kulim (Scorodocarpus borneensis Becc.) is one of Indonesia wood species which have high economic value. This species is widely used by people in Bagan Siapi-api the Province of Riau for ship and building materials (Ismail 2000). Kulim is categorized as strong and long lasting wood. Unfortunately, this species of wood is rare to be found in the nature due to habitat disturbance. The aims of this research are to the population condition identify, the young level of kulim, the structure and composition of vegetations surround kulim‟s natural habitat. The vegetation data was collected through plot sampling using combination between strip and quadrate sampling techniques (20 m x 500 m). The total of transec was 5 and it was allocated systematically at every 100 m far from the location kulim found. Trees analysis was undertaken in 20m x 20m of square in every line, at the pole 10m x 10m, at the sapling 5m x 5m and the seedling 2m x 2m. The total of sampling units were 125 plots. The crown stratification was made through drawing 20 m x 100 m line. The data then was analyzed descriptively and quantitatively using vegetation analysis formulas. The formulas were aimed to get Important Value Index (IVI), Evennes Index and Diversity Index. Kulim has density at seedling level of 180 ind / ha, at saplings 35 ind / ha, at the pole 8 ind / ha, while the value at the tree level 2 ind / ha. High amount of Kulim found in diameter classes <10 cm of 20 individuals. It has been found as many as 28 species of tree-level, 24 species on the pole and stake, and 21 in 14 species of seedlings. Middle species diversity index value of 2.95 obtained, whereas equitable distribution of the species seen from the index value close to 1. There are A and B strata header with average height ranges from 20-40 meters. Kulim has strata header with average height ranges from 15-20 meters. Based on this research, Kulim population in TNTN heading to extinction. It‟s caused by the uncontrolled logging in the past. It can be seen by the number of logged-over Kulim‟s stump on this area. It‟s reasonable that Vegetation structure in Kulim habitats dominated by stands of young trees with average stem diameters ranging from 20-30 cm. there is low composition of habitus on research plots that only contain 32 species of tree composition.
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Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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