Hidayat S. 2019. The study of suweg (Amorphophallus paeoniifolius) and other undergrowth species in teak plantation forest of Temengeng, Blora, Indonesia. Biodiversitas 20: 37-42. Suweg (Amorphophallus paeoniifolius (Dennst.) Nicolson) is one of the potential sources of food plants that are often found growing wild in farmers' gardens or fields. In the teak plantation forest of Cepu, precisely in Temengeng village, there are many suwegs growing among the old and big teak trees. To find out the potential and range of habitat where suweg grows, especially in teak plantation forest, ten observation plots were made using purposive sampling method, each measuring 10 x 10 m2. Overall, 17 adults and 30 young individuals of suweg were found. In addition to teak, 43 wild plant species were identified alongside suweg, from various habits, namely herb, liana, shrub, epiphyte, and tree. Herbs were the most common plants growing around suweg, especially from the families of Fabaceae, Compositae, and Zingiberaceae. The species that were almost always found together in the suweg plots were Tetrastigma lanceolarium (Roxb.) Planch. and Thespesia lampas (Cav.) Dalzell, but in quantity, Costus spiralis (Jacq.) Roscoe was more abundant than the other two species, although it was only found in four sampling plots. The results of this study also showed that there was no association between suweg and certain plants; this was supported by the low similarity index among plots.

ABSTRAKBayur (Pterospermum javanicum Jungh.) adalah salah satu tumbuhan kayu komersial yang tumbuh di sekitar kawasan Taman Nasional Gunung Rinjani (TNGR), terutama di hutan dataran rendah. Keberadaan bayur sangat penting bagi masyarakat Lombok, selain sebagai bahan bangunan juga digunakan sebagai bahan minuman kesehatan (tuak Bayur). Keberadaan bayur di hutan semakin terancam bila tidak dilakukan pengawasan yang ketat. Kajian tentang pola sebaran dan asosiasi bayur dengan tumbuhan lain perlu dilakukan untuk mendukung pengetahuan keberadaan Bayur di kawasan TNGR. 40 plot sampling yang dibuat di jalur traking Senaru diperoleh hasil 25 individu/ha bayur dewasa yang menyebar secara berkelompok. Melalui perhitungan chi-square ternyata sebagian besar tumbuhan di area pengamatan tidak berasosiasi dengan bayur.

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ABSTRAKPenelitian telah dilakukan di Hutan Lindung (HL) Sesaot terutama di kawasan penyangga yang masih berhutan dengan tujuan memberikan informasi mengenai kondisi vegetasi yang meliputi keanekaragaman, struktur, dan komposisinya. Informasi ini penting sebagai bahan evaluasi pengelola hutan untuk bisa mempertahankan dan bahkan memperbaiki komposisi jenis tumbuhan selayaknya sebagai vegetasi hutan alami. Penelitian dilakukan di dua blok hutan ini dengan metoda petak sampling secara bertingkat. (IVI 95.55). In contrast, in the block Pengkoak, D. dichotoma has the highest IVI, followed by Laportea decumana.

Abstract. Pouladi M, Qadermarzi A, Baharvand F, Vazirizadeh A, Hedayati A. 2017 Province, Persian Gulf,. The main purpose of present study was to investigate the abundance and biodiversity of phytoplankton from Mond estuary, Bushehr, Persian Gulf during different seasons and its relationships with environmental parameters and nutrients. Samples were taken in mid-season from spring 2012 to winter 2013 for oneyear period. The phytoplankton were contributed by the phyla Bacillariophyta, Dinophyta, Haptophyta, and Chlorophyta. The class Coscinodiscophyceae and Bacillariophyceae belonging to Bacillariophyta were the most diverse and dominant with 22 and 16 genera, respectively. The mean phytoplankton abundance were recorded in spring 24), respectively. The phytoplankton assemblages were most diverse and abundant at station-5 in all seasons. In addition, there were significant correlation (P<0.01) between phytoplankton abundance and diversity with pH, salinity, NO 3 , PO 4 and temperature. Based on Principle Component Analysis (PCA), the most important factors that could describe most changes of abundance and diversity of phytoplankton in the Mond River estuary system were salinity, NO 3 , pH, PO 4 and temperature, respectively. Results demonstrated that diatoms were the dominant population and salinity factor was more effective factor that affected the diversity and abundance of phytoplankton during study period in Mond River estuary. . Effects of physicochemical factors on seasonal variations of phytoplankton in the Mond River Estuary of Bushehr