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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Proceeding International Conference on Global Resource Conservation Buletin Kebun Raya REINWARDTIA
Yayan Wahyu C. Kusuma
Bogor Botanic Gardens, .11. Ir. H. Juanda 13, Bogor, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Health Professions Immunology & microbiology Veterinary Other

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POPULATION AND MICROHABITAT OF Gonystylus bancanus (Miq.) Kurz IN DANAU PULAU BESAR-DANAU BAWAH WILDLIFE SANCTUARY, SUMATRA Kusuma, Yayan Wahyu C.; Pribadi, D.O.; Isnaini, Y.
Buletin Kebun Raya Vol 16, No 1 (2013): Buletin Kebun Raya Vol. 16 (1) Januari 2013
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

Ramin (Gonystylus bancanus) is one of the major timber species that facing high exploitation in Indonesia. This species can only be found on a specific peat swamp habitat, thus it confines its distribution. Information on its current population and microhabitat characteristics is relatively limited. Here, we investigated natural population and microhabitat of ramin in a peat swamp area in Riau Province using  random transects consist of 46 (100m2) sampling plots. Forty-eight individuals of ramin were found in which 46 of these belonged to G. bancanus, while the other two were different species. The estimated population density of ramin in this area was 7.18±2.75 individuals/ha i.e there were approximately seven individuals in each one-ha area of study. The population structure of ramin showed a J-shaped curve bearing many large old trees with few saplings without any seedlings. The microhabitat was investigated using the Discriminant Function Analysis (DFA) and Canonical Analysis, generating two significant variables that discriminated three groups of the population.
Etlingera loerzingii (Zingiberaceae) — A GORGEOUS TORCH GINGER FROM SUMATRA GROWN IN BOTANIC GARDENS Poulsen, Axel Dalberg; Ardiyane, Marlina; Kusuma, Yayan Wahyu C.
Buletin Kebun Raya Vol 12, No 1 (2009): Buletin Kebun Raya Vol. 12 (1) Januari 2009
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Tiga belas jenis Etlingera telah dideskripsi berdasarkan material yang diperoleh dari Sumatera, selanjutnya lima jenis lainnya telah didokumentasi sebagai catatan baru (new records). Salah satu jenis Etlingera dari Sumatera yang cukup spektakuler adalah Etlingera loerzingii. Deskripsi asli jenis ini dahulu dibuat berdasarkan material yang tidak lengkap, dan sekarang deskripsi lengkapnya disajikan di dalam tulisan ini. Dengan daun yang indah serta bentuk dan warna perbungaan yang menarik, E. loerzingii memiliki potensi untuk dikembangkan sebagai tanaman hias.
POPULATION AND MICROHABITAT OF Gonystylus bancanus (Miq.) Kurz IN DANAU PULAU BESAR-DANAU BAWAH WILDLIFE SANCTUARY, SUMATRA Kusuma, Yayan Wahyu C.; Pribadi, D.O.; Isnaini, Y.
Buletin Kebun Raya Vol 16, No 1 (2013): Buletin Kebun Raya Vol. 16 (1) January 2013
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Ramin (Gonystylus bancanus) is one of the major timber species that facing high exploitation in Indonesia. This species can only be found on a specific peat swamp habitat, thus it confines its distribution. Information on its current population and microhabitat characteristics is relatively limited. Here, we investigated natural population and microhabitat of ramin in a peat swamp area in Riau Province using  random transects consist of 46 (100m2) sampling plots. Forty-eight individuals of ramin were found in which 46 of these belonged to G. bancanus, while the other two were different species. The estimated population density of ramin in this area was 7.18±2.75 individuals/ha i.e there were approximately seven individuals in each one-ha area of study. The population structure of ramin showed a J-shaped curve bearing many large old trees with few saplings without any seedlings. The microhabitat was investigated using the Discriminant Function Analysis (DFA) and Canonical Analysis, generating two significant variables that discriminated three groups of the population.
Etlingera loerzingii (Zingiberaceae) — A GORGEOUS TORCH GINGER FROM SUMATRA GROWN IN BOTANIC GARDENS Poulsen, Axel Dalberg; Ardiyane, Marlina; Kusuma, Yayan Wahyu C.
Buletin Kebun Raya Vol 12, No 1 (2009): Buletin Kebun Raya Indonesia Vol. 12 (1) January 2009
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

Tiga belas jenis Etlingera telah dideskripsi berdasarkan material yang diperoleh dari Sumatera, selanjutnya lima jenis lainnya telah didokumentasi sebagai catatan baru (new records). Salah satu jenis Etlingera dari Sumatera yang cukup spektakuler adalah Etlingera loerzingii. Deskripsi asli jenis ini dahulu dibuat berdasarkan material yang tidak lengkap, dan sekarang deskripsi lengkapnya disajikan di dalam tulisan ini. Dengan daun yang indah serta bentuk dan warna perbungaan yang menarik, E. loerzingii memiliki potensi untuk dikembangkan sebagai tanaman hias.
NOTES ON RAFFLESIA (RAFFLESIACEAE) IN SUMATRA WITH A NEW RECORD RAFFLESIA GADUTENSIS MEIJER MAHYUNI, RIDHA; KUSUMA, YAYAN WAHYU C.; WIHERMANTO, WIHERMANTO; VELDKAMP, J. F.
REINWARDTIA Vol 14, No 2 (2015): Vol.14 No.2
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1013.747 KB) | DOI: 10.14203/reinwardtia.v14i2.1678

Abstract

MAHYUNI, R., KUSUMA,Y. W. C., WIHERMANTO & VELDKAMP, J. F. 2015. Notes on Rafflesia (Rafflesiaceae) in Sumatra with a new record Rafflesia gadutensis Meijer. Reinwardtia 14(2): 317 - 322. Pulau Mursala is a small island west of the Sibolga, Tapanuli Tengah District, North Sumatra, Indonesia. The occurrence of the genus Rafflesia (Rafflesiaceae) there has never been reported before. However, during a visit in April 2013 three populations are located close together with more than twenty buds and some rotting blooming flowers, Tetrastigma sp. was detected. Field observations could be made and material was collected for comparison with that in the Herbarium Bogoriense (BO). It was concluded that they are R.gadutensis Meijer, which is known from Padang, Ulu Gadut. Notes on its morphology are given. The distribution of species is discussed.
Conservation Notes on Syzygium ampliflorum (Koord. & Valet.) Amshoff and Several Related Species in Java Kusuma, Yayan Wahyu C.
Proceeding International Conference on Global Resource Conservation Vol 4, No 1: Proceeding of 4th ICGRC 2013
Publisher : Proceeding International Conference on Global Resource Conservation

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Abstract

Syzygium ampliflorum is listed as Critically Endangered by IUCN red list since 1998. It is an endemic species with a restricted distribution confined to Mount Galunggung, West Java, Indonesia. Revisitation study was conducted by surveying the same area where the species is firstly found and described in 1900. Of the four forest localities as the survey area around the Mount Galunggung there were no detection of the species existence. Meanwhile, eleven other congeneric species (Syzygium racemosum (Blume) DC., Syzygium acutatum (Miq) Amshoff, Syzygium pyrifolium (Blume) DC., Syzygium macromyrtus (K & V) Merril & Perry, Syzygium aemulum (Blume) Koord. & Valeton., Syzygium antisepticum (Blume) Merril & Perry, Syzygium pycnanthum Merril & Perry, Syzygium klampok (Miq.) Amshoff, Syzygium rostratum (Bl.) DC., Syzygium samarangense (Blume) Merril & Perry and Syzygium nervosum DC.) were still found in the study area. Based on the result, there are still some possibilities on the existence of the species. Nevertheless, this species is still enigmatic. Therefore, restate its conservation status as Critically Endangered is more appropriate then include it into Data Deficient. Keywords: endemic, IUCN, ki sireum, reassessment, Redlist, revisitation 
Microhabitat Influence on Growth Distribution Pattern of Ramin (Gonystylus bancanus) in Siak, Riau Province Pribadi, Didit Okta; Kusuma, Yayan Wahyu C.
BIOTROPIA Vol. 22 No. 1 (2015): BIOTROPIA Vol. 22 No. 1 June 2015
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (376.79 KB) | DOI: 10.11598/btb.2015.22.1.284

Abstract

Plant growth distribution patterns are influenced by habitat characteristics, ability of adaptation and association with other plant or animals. The influence of those factors, especially habitat characteristic, needs to be species defined to support plant conservation management. This study was aimed to: 1) measure plant growth dependence on their microhabitat; 2) define microhabitat variables that significantly influence the growth; and 3) develop suitable conservation measures at species level. Ramin (Gonystylus bancanus) is one of major timber species that has been facing high exploitation in Indonesia. This species is usually found on specific “peat swamps” ecosystem. Data were collected through primary surveys in Riau Province and analyzed by clustering the adult based on total height and basal area variables and describing the distribution pattern of cluster. Then, Discriminant Function Analysis the (DFA) was used to overlay the cluster with the distribution of microhabitat characteristic consist altitude, slope, ing soil humidity, soil pH, peat depth and canopy cover (measured in percentage). The results showed that distribution of microhabitat matched with 67.4% of height distribution and 78.3% of width distribution of tree basal area. Altitude and canopy cover percentage had significant correlation with total height distribution (α=0.05). Meanwhile, altitude, canopy cover and slope had significant correlation with basal area (α=0.1). However, peat depth variable showed an interesting pattern since shallower peat depth was followed by wider basal area. High correlation between plant growth and its microhabitat suggested that to conserve , conservation offered better strategy G. bancanus in-situ than conservation ex-situ.
Co-Authors Axel Dalberg Poulsen, Axel Dalberg D.O. Pribadi Didit Okta Pribadi J. F. VELDKAMP, J. F. Marlina Ardiyane, Marlina RIDHA MAHYUNI, RIDHA WIHERMANTO WIHERMANTO, WIHERMANTO Y. Isnaini