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All Journal REINWARDTIA BERITA BIOLOGI

Deden Girmansyah, Deden

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Author-ID : 595972

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education

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Two new species of Begonia (Begoniaceae) from Bukit Tigapuluh National Park, Sumatra, Indonesia Girmansyah, Deden
REINWARDTIA Vol 13, No 3 (2012): Vol. 13 No. 3
Publisher : Research Center for Biology

Two new species of Begonia (Begoniaceae) from Bukit Tigapuluh National Park, Sumatra, Indonesia are described. Those are Begonia triginticollium Girm. belongs to Begonia section Bracteibegonia and Begonia dolichocarpa Girm. belongs to Begonia section Petermannia.

Two new species and one new subspecies of Begonia (Begoniaceae) from Southeast Sulawesi, Sulawesi, Indonesia Girmansyah, Deden
REINWARDTIA Vol 13, No 1 (2009): Vol. 13 No. 1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v13i1.4

Two new species and one new subspecies, of Begonia are described from the Mekongga Mountains in Southeast Sulawesi: Begonia mekonggensis Girmansyah & Wiriadinata, Begonia watuwilensis Girmansyah, and Begonia aptera Blume subsp. hirtissima Girmansyah & D.C.Thomas,. Begonia mekonggensis and Begonia watuwilensis belong to Begonia section Petermannia. Both species have characters which are very unusual amongst species in this section. Begonia mekonggensis is dioecious, and Begonia watuwilensis exhibits protandrous inflorescences with basal male flowers and several distal female flowers. Begonia aptera Blume subsp. hirtissima belongs to Begonia section Sphenanthera.

A TAXONOMIC STUDY OF BALI AND LOMBOK BEGONIA (BEGONIACEAE) Girmansyah, Deden
REINWARDTIA Vol 12, No 5 (2009): Vol. 12, No. 5
Publisher : Research Center for Biology

GIRMANSYAH, DEDEN. 2009. A taxonomic study of Bali and Lombok Begonia(Begoniaceae). Reinwardtia 12(5): 419â434. A taxonomic study of Bali and Lombok Begonia was based on an investigation of morphological characters from 60 specimens in Herbarium Bogoriense.This study shows that there are 8 species that can be recognized: three species already in the genus (Begonia coriacea, B. longifolia, and B. tenuifolia) and five new (Begonia baliensis, B. lempuyangensis, B. pseudomuricata, B. multibracteata, and B. lombokensis).

Floristic Study of West Sumbawa, Indonesia Wiriadinata, Harry; Girmansyah, Deden; Hunter, James; Hoover, W. Scoot; Kartawinata, Kuswata
REINWARDTIA Vol 13, No 5 (2013): Vol. 13, No. 5
Publisher : Research Center for Biology

A floristic survey was undertaken in mountains forest of West Sumbawa and some surrounding lower forests, an area of Indonesia receiving limited biological study. Three hundred sixteen species of Angiosperms and ferns were collected from this area in 2004 and 2005. The collection represents 101 families and 234 genera.

Exploration of High elevation liana colonies on Mt. Slamet, Central Java, Indonesia Hoover, WS; Girmansyah, Deden; Wiriadinata, Harry; Hunter, James M.
REINWARDTIA Vol 13, No 1 (2009): Vol. 13 No. 1
Publisher : Research Center for Biology

One hundred forty-five individual lianas were distributed on 2 East facing ridges on the second highest mountain on Java, Mt. Slamet (3418 m.), Central Java, Indonesia. Twenty one colonies were observed on small flat areas on ridges. The liana species observed include: Embelia pergamacea, Toddalia asiatica, Elaeagnus latifolia, Schefflera lucida, Vaccinium laurifolium and Lonicera javanica. Diameter of each liana was measured and liana density/flat area calculated. Floristic collecting was under- taken within the elevational gradient of liana distribution. Data suggest an ecotone transition from lower to upper mon- tane forest is observed between 2200 and 2300 m, though forest types are difficult to determine due to disturbance caused by fire at the upper elevations. Observing lianas at these unusuall high elevations with near pluvial rainfall, con- tradict established scientific theory concerning global distribution and abundance of lianas.

A NEW SPECIES OF BEGONIA (BEGONIACEAE) FROM SUMBAWA, LESSER SUNDA ISLANDS, INDONESIA GIRMANSYAH, DEDEN
REINWARDTIA Vol 15, No 2 (2016): Vol.15 No.2
Publisher : Research Center for Biology

GIRMANSYAH, D. 2016. A new species of Begonia (Begoniaceae) from Sumbawa, Lesser Sunda Islands, Indonesia. Reinwardtia 15(2): 115 â 118. â A new species of Begonia L. (Begoniaceae), Begonia semongkatensis Girm., is described from Sumbawa Island, Lesser Sunda Islands, Indonesia. The species belongs to Begonia section Reichenheimia. An illustration, identification key and distribution maps are provided.

BEGONIA TANGGAMUSENSIS, A NEW SPECIES OF BEGONIA SECT. PLATYCENTRUM FROM GUNUNG TANGGAMUS, SUMATRA AND NOTES ON ALLIED SPECIES BEGONIA SCOTTII AND BEGONIA PSEUDOSCOTTII HUGHES, MARK; GIRMANSYAH, DEDEN
REINWARDTIA Vol 23, No 1 (2024): Volume 23, No 1 (2024): Reinwardtia
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2024.4772

A new species, Begonia tanggamusensis Girm. & M.Hughes (§ Platycentrum), is described from Gunung Tanggamus in southern Sumatra, where it is endemic. It grows on moss covered rocks and at the base of large trees in montane forests at an elevation of 1,700–2,000 m. A provisional conservation assessment places the species in the Near Threatened category.

LEAF ANATOMICAL ADAPTATION OF EXOTIC INVASIVE MICONIA CRENATA (VAHL.) MICHELANG ALONG ALTITUDINAL GRADIENT: A CASE STUDY OF MOUNT GEDE PANGRANGO NATIONAL PARK, WEST JAVA, INDONESIA JUNAEDI, DECKY INDRAWAN; TIHURUA, EKA FATMAWATI; WIDOYANTI, WIDOYANTI; GIRMANSYAH, DEDEN
REINWARDTIA Vol 23, No 1 (2024): Volume 23, No 1 (2024): Reinwardtia
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/reinwardtia.2024.4755

Miconia crenata is a widely spread species that occurs in multiple ecosystems. However, there is limited information on M. crenata invasion biology, ecology, and anatomy, particularly in the context of mountainous tropical forest and biodiversity management. Therefore, we examined elevation effects upon leaf anatomical structure of exotic invasive M. crenata at Mount Gede-Pangrango National Park (MGPNP). We sampled the leaves at four different elevations i.e., 715 m asl, 800 m asl, 900 m asl, and 1,000 m asl. Cross section leaf anatomy specimens of M. crenata were obtained by using paraffin method and stained with safranin and fast green. This study found that M. crenata leaf anatomy was correlated with elevation shown by changes in leaf tissue thickness and stomata size. Further study is needed of leaf anatomical variation of exotic invasive species along driven by soil properties and the variation across different plant taxa and growth forms. Such studies are important to determine adaptation capacity of invasiveness.

Co-Authors Decky Indrawan Junaedi Eka Fatmawati Tihurua Harry Wiriadinata, Harry Hoover, Scott Hughes, Mark James Hunter, James James M. Hunter, James M. Kuswata Kartawinata W. Scoot Hoover, W. Scoot WIDOYANTI, WIDOYANTI WS Hoover, WS

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