Judul: Model of Stand Structure Dynamic and Carbon Potential in Papua Logged-Over Natural Forest of Papua
Abstrak: Hutan alam bekas tebangan memiliki komposisi struktur tegakan yang berbeda dengan hutan alam primer sebagai akibat dari kegiatan penebangan. Kayu umumnya merupakan komoditas utama dari hutan, namun tren pemanfaatan hutan saat ini mengarah pada usaha pemanfaatan hasil hutan bukan kayu dan jasa lingkungan. Kegiatan pengelolaan hutan lestari tidak hanya dilihat dari keberlanjutan produksi kayu tetapi dilihat dari keberlanjutan peran hutan sebagai penyedia jasa lingkungan, salah satunya adalah sebagai penyimpan karbon. Pada penelitian ini akan dikaji bagaimana dinamika struktur tegakan dan karbon hutan serta skenario yang tepat dalam menentukan siklus dan intensitas tebang pada tegakan pemeliharaan dan tanpa pemeliharaan di PT. Tunas Timber Lestari, Papua. Data yang digunakan merupakan data seri PUP (Petak Ukur Permanen) hasil pengamatan selama 10 tahun (2005-2015). Analisa data dilakukan dengan membentuk model dinamika struktur tegakan dan karbon hutan dengan menggunakan variabel laju ingrowth, upgrowth, dan mortality. Berdasarkan hasil analisis menunjukkan bahwa rata-rata laju ingrowth pada tegakan dengan pemeliharaan cenderung lebih kecil dibandingkan dengan tegakan tanpa pemeliharaan. Besarnya nilai upgrowth bervariasi dimana upgrowth mengalami peningkatan pada kelas diameter 10-19 cm sampai 30-39 cm untuk tegakan tanpa pemeliharaan dan 20-29 cm sampai 40-49 cm untuk tegakan dengan pemeliharaan. Tingkat mortality pada tegakan tanpa pemeliharan cenderung lebih tinggi terutama pada kelompok jenis Rimba Campuran dan Non Komersil, sedangkan pada kelompok jenis Meranti tingkat kematian banyak terjadi pada tegakan dengan pemeliharaan. Siklus dan intensitas tebang optimal sebagai salah satu alternatif skenario dalam perencanaan pengelolaan hutan adalah siklus 30 tahun dan intensitas tebang 40% pada kelas diameter 40 dan 50up cm, Logged-over natural forest has a different stand structure composition from primary natural forest as a result of logging activities. Woods are commonly the main commodity of forests, but the current trend of forest use has led to non-timber forest products and environmental services. Sustainable forest management activities are not only seen from the sustainability of wood production but also from the sustainable role of forest as a provider of environmental services, one of which is as a carbon storage. In this study, the dynamics of stand structure and carbon and the appropriate scenario in determining the cutting cycle and intensity of stands with and without treatments at PT. Tunas Timber Lestari, Papua, were examined. The data used were Permanent Sample Plots or ( Petak Ukur Permanen, PUP) data series that were observed for 10 years (2005-2015). Data analysis was carried out by formulating a dynamic model of stand structure and carbon potential using the variables of ingrowth, upgrowth, and mortality rates. Results of the analysis showed that the average ingrowth rate in stands with treatment was smaller than stands without treatment. The value of upgrowth varied where upgrowth increased in diameter classes from 10-19 cm to 30-39 cm for stands without treatment and 20-29 cm to 40-49 cm for stands with treatment. The mortality rate in stands without treatment tended to be higher, especially in species groups of Rimba Campuran and Non-Commercial groups, while in Meranti group, the mortality rate mostly occurred in the stands with treatment. Optimal cutting cycle and intensity as an alternative scenario in forest management planning is cycle
Keyword: Carbon, Ingrowth, Mortality, Stand Structure Dynamic, Upgrowth

Judul: Model Dinamika Struktur Tegakan Hutan Alam Bekas Tebangan di Provinsi Kalimantan Tengah, Kalimantan Barat, dan Kalimantan Selatan
Abstrak: Most of the natural forest areas in Indonesia are logged over areas, in which their stand structures are different from those of primary forests. The phenomenon of stand structure dynamics includes recruitment, upgrowth, and mortality. The sustainability of productive forests depends on, among others, forest growth capability, environmental characteristics and proper forest management techniques in accordance with the ability of forest dynamic process. The objective of this study was to obtain dynamic models for the stand structures of logged over natural forests for each diameter classes and tree species groups, and then used them to predict stand structures for the next few years by using a stand structure projection method. This study used periodical measurement data from 44 permanent sample plots (PSP), which were established in the logged over areas of 5 HPH (timber concession companies) in West Kalimantan, 1 HPH in South Kalimantan, and 12 HPH in Central Kalimantan Provinces. Each PSP was one hectare in size, and it had various logging times and measurement periods. Data processing was carried out in the four stages : 1) analyzing the stand growth of each PSP in a 3-year period ; 2) species grouping (i.e. Dipterocarp and Non-Dipterocarp) and diameter grouping into 11 diameter classes (starting from 10-14,99 cm up to 60 cm up; 3) calculating the number and basal area of trees for each species group at each PSP; and 4) analyzing the data by using regression analysis to derive prediction models for projecting the dynamic of stand structures. Results showed that the upgrowth models for Dipterocarpaceae had coefficients of determination (R2) ranging from 14.8% to 70.4%, while those for Non-Dipeterocarpaceae ranging from 12.0% to 92.2%. The fixed models had R2 ranging from 5.4% to 73.0% (for Dipterocarpaceae) and from 5.6% to 82.3% (for Non-Dipeterocarpaceae). For diameter classes with non significant relationships or R2 < 50%, the mean of proportions was used to calculate the probabilities of upgrowth and stay on such diameter classes. The projection result of stand structure dynamics up to 51 years showed that the number of trees was increase. However, the projected stand structures tended to not follow the common “inverse J” curve of stand structure. Therefore, the projected stand structures were only recommended for no more than 12 years, which was also the maximum limit of the after logging period as used for constructing the models.
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Judul: Infeksi Virus Parainfluenza Pada Anjing
Abstrak: Virus parainfluenza anjing termasuk famili Paramyxoviridae, berbentuk pleomorf dengan ukuran bervariasi (bergaris tengah antara 100-500 nm), berpembungkus peka ether, berisi genom RNA dan secara serologis mempunyai kesamaan dengan virus SV-5 kera; dikenak sebagai salah satu kausa penting dari sindrom "kennel cough". Infeksinya dapat mengenai anjing semua umur yang belum pernah terinfeksi atau mendapatkan vaksinasi mengakibatkan gejala klinis ringan yang terbatas pada traktus respirasi atu infeksi yang secara klinis tidak memperlihatkan gejala nyata. Gejala klinis yang nampak setelah masa inkubasi (1-5 hari) terlewati berupa batuk yang tidak berat selama beberapa hari, berbagai tingkat tonsilitis dan pharyngitis dan kadang-kadang ditemukan kenaikan temperatur rektal antara 1-2 derajat C dari temperatur normal rat-rata. Anjing terinfeksi mengandung virus pada traktus respirasi bagian atas dan bawah serta limfonoduli sampai hari ke 9 setelah infeksi. Penyebaran virus antar anjing terjadi secara aerogen.
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