Judul: Komposisi Jenis dan Struktur Hutan di Taman Hutan Raya Dr. Moh. Hatta, Padang, Sumatera Barat
Abstrak: According to Law of Republic of Indonesia No. 5 of 1990, the Forest Park is a nature conservation area which collects natural and unnatural plants and animals. The composition and structure of stands can be used to estimate the density of trees in various diameter classes. This study aims to determine the composition and structure of the vegetation contained in the block protection, utilization, and collection. The research was conducted from January to February 2021 at Bung Hatta Forest Park Conservation Area Padang. The research result show that dominant type found in the protection block for the tree’s level was Glochidion obscurum. In the utilization block, the dominant type called Pinus merkusii, then in the collection block dominated by Swietenia macrophylla. The diversity index value (H') on the three blocks is classified as the moderate with H' value between 1-2. Meanwhile, the wealth index is classified as the low with a value of R1 <3.5. The result also found that the pattern of species distribution is clumped. The stratification of Bung Hatta Forest Park Conservation Area’s crown is in the B and C stratum.
Keyword: H', dominant type, composition, R1, vegetation structure

Judul: Stand Composition and Structure in Wan Abdul Rachman  Forest Park, Lampung
Abstrak: Menurut Undang-Undang No 5 Tahun 1990 Taman hutan raya merupakan hutan konservasi yang berfungsi sebagai kawasan pelestarian alam untuk tujuan koleksi tumbuhan dan satwa alami maupun non-alami,yang dimanfaatkan untuk penelitian, ilmu pengetahuan, pendidikan yang menunjang budidaya, budaya, pariwisata dan rekreasi. Tujuan dari penelitian ini untuk menganalisis komposisi dan struktur tegakan yang terdapat di Tahura Wan Abdul Rachman, Lampung pada blok perlindungan, blok pemanfaatan, dan blok koleksi. Hasil dari penelitian ini menunjukan jumlah jenis pada blok koleksi lebih banyak jenisnya dibandingkan dengan blok pemanfaatan dan perlindungan. Jenis yang mendominasi pada ketiga blok penelitian yaitu Dalbergia latifolia, Durio zibethinus, Tristaniopsis merguensis. Nilai indeks keanekaragaman jenis (H’) pada ketiga blok pada tingkat semai, pancang, tiang, dan pohon berada pada kriteria sedang dengan nilai H’>2, sedangkan untuk indeks kekayaan tergolong dalam kategori rendah. Stratifikasi tajuk Tahura Wan Abdul Rachman berada pada stratum B dan C., According to Law No. 5 of 1990 Grand forest parks are conservation forests that function as nature conservation areas for the purpose of collecting natural and non-natural plants and animals, which are used for research, science, education that support cultivation, culture, tourism and recreation . The purpose of this study was to analyze the composition and structure of the stands in Tahura Wan Abdul Rachman, Lampung in protection blocks, utilization blocks and collection blocks. The results of this study indicate that the number of species in the collection block is higher than the utilization and protection block. The species that dominated the three research blocks were Dalbergia latifolia, Durio zibethinus, and Tristaniopsis merguensis. The index value of species diversity (H') in the three blocks at the level of seedlings, saplings, poles and trees is in the medium criteria with a value of H'> 2, while the richness index is in the low category. Stratification of Tahura Wan Abdul Rachman's crown is in stratum B and C.
Keyword: Composition, Dominant index, Dominant species, Vegetation structure, Weath index

Judul: Alternatif Media Kultur dan Model Infeksi Leucocytozoon caulleryi Menggunakan Telur Embrio Tertunas.
Abstrak: This research was designed to understand utilization of embryonated egg as cultivation media and infection model of parasite Leucocytozoon caulleryi. An examination included percentage of parasitemia and leukocyte differential of chicken embryo. This research used 24 embryonated egg which were inoculated with gametocytes of L. caulleryi via chorioallantoic membrane (CAM) and allantoic cavity (AC) route. Inoculation were done at 13 days old and blood smear of embryo were done at 16, 17,18, and 19 days old. The result showed significant different of inoculation route and each embryonated egg’s age. Inoculation route via CAM showed higher parasitemia than AC. The highest of parasitemia were showed at 19 days old of embryonated egg (6 days post-inoculation) both CAM and AC. Percentage of leukocyte differential showed significant different of both inoculation route and embryo’s egg on 16, 17, 18, and 19 days old. Both CAM and AC route showed same percentage of lymphocyte as the highest percentage followed by heterophil, monocyte, basophil, and eosinophil. Thus, embryonated egg could be used as alternative cultivation media with chorioallantoic membrane as better inoculation route and infection model which was showed by imune response from leukocyte differential.
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