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All Journal Jurnal Bios Logos Bioma : Berkala Ilmiah Biologi BIOTROPIA - The Southeast Asian Journal of Tropical Biology Prosiding KPSDA BIO-EDU: Jurnal Pendidikan Biologi Proceeding Biology Education Conference
RETNO PENI SANCAYANINGSIH
Staf Pengajar Fakultas Biologi UGM
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Veterinary

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Journal : Proceeding Biology Education Conference

 1 
Densitas dan Fekunditas Cembirit (Tabernaemontana macrocarpa Jack.) di Komunitas Acacia auriculiformis A.Cunn.ex Benth di Hutan Lindung Mangunan, Bantul Kusumadewi, Anindyasari; Sancayaningsih, Retno Peni
Proceeding Biology Education Conference: Biology, Science, Enviromental, and Learning Vol 13, No 1 (2016): Prosiding Seminar Nasional XII Biologi
Publisher : Universitas Sebelas Maret

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Abstract

Acacia Community in the Conservation Forest of Mangunan has six vegetation species with four largest dominant, they are Acacia (Acacia auriculiformis), Cembirit (Tabernaemontana macrocarpa), Mahogany (Swietenia mahagony), and Sono (Dalbergia latifolia). In previous growthform analysis of A. auriculiformis, tree density was higher (380 ind Ha-1) compared to T. macrocarpa (280 ind Ha-1), but the sapling and seedling of A. Auriculiformis had lower density (20ind Ha-1 and 23.600 ind Ha-1) compared to T. macrocarpa (520 ind Ha-1 and 26.800 ind Ha-1). The presence of T. macrocarpa showed that there was an interspecies competition critically with the main community, A. auriculiformis. Therefore, the purposes of this research are to analyze the density of tree, sapling, and seedling growthforms of T. macrocarpa; to assess the fecundity of T. macrocarpa of 3 stem diameter classes. This research is the continuation of the previous research in 2015. Data collection had been conducted in December 2015-February 2016 in Conservation Forest Mangunan, Bantul. Serial observations were conducted six times in five permanent plots of 10x10 m2. The growth data were analyzed using Relative Growth Rate (RGR) analysis. Results of this research show that T. macrocarpa density from tree, sapling, and seedling growthforms are 480 ind Ha-1, 860 ind Ha-1, and 30.200 ind Ha-1. T. macrocarpa stands with smaller diameter have greater RGR value (0,00079 cm) than stands with larger diameter (0,00040 cm). The highest fecundity value of stands from the large, medium and, small stands diameter: 2,37%; 1,93%; and 1,16% respectively. The highest RGR, fecundity, and seedling density value of T. macrocarpa show an aggressive growth, thus, this species is estimated to threat or substitute the main species A. auriculiformis.Keywords: Density dan Fecundity of Tabernaemontana macrocarpa Jack., Acacia auriculiformis A.Cunn.ex Benth Community, Conservation Forest of Mangunan. 
Densitas dan Fekunditas Tabernaemontana macrocarpa di Komunitas Pinus merkusii, Hutan Lindung Mangunan, Bantul Atie, Abi Giusti Wohing; Sancayaningsih, Retno Peni
Proceeding Biology Education Conference: Biology, Science, Enviromental, and Learning Vol 13, No 1 (2016): Prosiding Seminar Nasional XII Biologi
Publisher : Universitas Sebelas Maret

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Abstract

Tabernaemontana macrocarpa Jack (Cembirit) is a tree species found in Mangunan Conservation Forest and hasn’t been known yet when it appears firstly. Until this time, information about it’s fecundity is still unknown. Pine litter containing allelopathic compound (monoterpen α-pinene and β-pinene) that is toxic to other species. The high density of it’s seedling indicated that pines allelopathy didn’t effect the Cembirit in Pines community. This research purposes to find out the density and fecundity of Cembirit in Pines community. Data collection had been conducted in December 2015 – February 2016 in Mangunan Conservation Forest, Bantul. Data collections were conducted 6 times in 10x10m2 permanent plots. The growth data were analysed using Relative Growth Rate (RGR) analysis. The Cembirit densities in Pines community are 10.420 ind Ha-1 (seedling), 460 ind Ha-1 (sapling), and 40 ind Ha-1 (tree). The Cembirit were categorized into 3 groups based on it’s stem diameter were including 7,7-9,8 cm (group 1), 9,9-11,8 cm (group 2), and 11,9-13,8 cm (group 3). The Cembirit’s RGR are, 0,00079 cm (group 1), 0,00069 cm (group 2), and 0,00055 cm (group 3), with their fecundity are 3,4%, 5,6% and 2,4%. The high density, RGR, and fecundity value of Cembirit, indicated it’s invasiveness and potentialy become a strong competitor for Pines. Keywords: T. macrocarpa, P. merkusii, inavasiveness, Mangunan
Co-Authors Achmadi Priyatmojo Alanindra Saputra Ali Djamhuri Anak Agung Istri Sri Wiadnyani Atie, Abi Giusti Wohing Binsasi, Remigius ENDANG SUTARININGSIH SOETARTO Kusumadewi, Anindyasari Ridesti Rindyastuti Rina Sri Kasiamdari Sigit Heru Murti Susiana Purwantisari Talakua, Matheos