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INDONESIA
Journal of Tropical Biodiversity and Biotechnology
Published by Universitas Gadjah Mada
ISSN : 25409573     EISSN : 25409581     DOI : -
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology
Journal of Tropical Biodiversity and Biotechnology (JTBB) is an authoritative source of information concerned with the advancement of tropical biology studies in the Southeast Asia Region. It publishes original scientific work related to a diverse range of fields in tropical biodiversity, functional biology, and biotechnology.
Arjuna Subject : -
Articles 327 Documents
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Diversity Status of Bamboo in Sumatra: A Review Ritonga, Muhammad Azli; Syamsuardi, Syamsuardi; Nurainas, Nurainas; Damayanto, I Putu Gede P.
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 4 (2024): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.90323

Abstract

Prior to initiating the conservation effort, conducting a bamboo species inventory in a specific area is crucial for obtaining information about the diversity status of the species in that region. Species inventorying is a fundamental step in ensuring that conservation efforts are targeted, effective, and based on sound scientific data. Regrettably, status of bamboo diversity in Sumatra is unavailable. Therefore, a study was conducted to determine the status of bamboo diversity in Sumatra. The study gathered data from literature review. It covered bamboo species, their statuses (endemic, introduced, ex-situ conservation, and threatened), and encompassed the main Sumatra Island and surrounding smaller islands. Species were re-identified and validated. Conservation status was assessed based on IUCN categories. There are 73 species of bamboo in the Sumatra region, representing 10 genera: Bambusa (11 species), Chimonobambusa (1 species), Dendrocalamus (10 species), Dinochloa (2 species), Gigantochloa (26 species), Melocanna (1 species), Neololeba (1 species), Phyllostachys (1 species), Schizostachyum (19 species), and Thyrsostachys (1 species). Eighteen species of Sumatran bamboo are known as introduced species, and 30 species are endemic to Sumatra, with the majority belonging to Gigantochloa (15 species). The least represented are Bambusa and Dinochloa, each having one endemic species. Bambusa heterostachya, Dendrocalamus giganteus, and Dendrocalamus membranaceus fall into the “least concern” (LC) category on the IUCN Red List, while the remaining 70 species have not been evaluated. A total of 44 species have been planted (conserved) in botanical gardens in Indonesia, while the remaining 29 species have not yet been conserved.
Praxelis (Asteraceae: Eupatorieae), A Newly Naturalised Genus for Kalimantan and Sumatra, Indonesia Hariri, Muhammad Rifqi; Irsyam, Arifin Surya Dwipa; Lestari, Ria Windi; Peniwidiyanti, Peniwidiyanti; Rahmaningtiyas, Lutfi; Zulkarnaen, Rizmoon Nurul; Widjaya, Aulia Hasan; Saripudin, Saripudin; Latifah, Dian; Yuliyanto, Ponco; Budianti, Noviana; Suhaya, Yoyo; Rosleine, Dian; Sulistyawati, Endah
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 4 (2024): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.90595

Abstract

The southern American genus Praxelis Cass. has 18 species. In Singapore and Indonesia, notably Java, P. clematidea R.M.King & H.Rob. has naturalised. The first record in Indonesia was in Bogor in 2018, although it is unverified elsewhere. Praxelis clematidea was found in Bangka, Belitung, Jambi, Lampung, and Palangka Raya during our exploratory field research in 2020–2023. The naturalised populations proliferate in roadsides, ditches, open spaces, and disturbed areas.  It thrives in a small swampy peat environment in Palangka Raya. Praxelis clematidea has been found outside Java, suggesting it could become an invasive alien species in Kalimantan and Sumatra.
Morphological Structure of the Tongue of Gekko gecko in Yogyakarta, Indonesia Aqiilah, Khairunnisa; Budipitojo, Teguh; Wijayanto, Hery; Budiariati, Vista; Pangestiningsih, Tri Wahyu; Ariana, Ariana; Saragih, Golda Rani; Kustiati, Ulayatul; Wihadmadyatami, Hevi
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 4 (2024): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.90995

Abstract

Gekko gecko is a member of the order Squamata from the family Gekkonidae and mainly feeds on small insects. This study aims to determine the morphology of the tongue of Gekko gecko through Scanning Electron Microscopy (SEM), hematoxylin–eosin (HE) staining, and immunohistochemistry (IHC). Six adult Gekko gecko were obtained from the Special Region of Yogyakarta, and Gekko gecko tongue samples were stored in SEM fixative solution and then observed with SEM. For histochemical and IHC staining, tongue samples were processed into paraffin blocks and cut into 8 µm-thick sections. The SEM revealed three types of papillae: dome-shaped papillae at the apex, fan-shaped papillae at the corpus, and scale–like papillae at the radix. Histological observations showed that the tongue of the Gekko gecko was composed of tunica mucosa and tunica muscularis, and goblet cells were present in the lamina of the epithelial mucosa. Meanwhile, no taste buds were found. Immunoreactivity against PGP 9.5 was observed on the tunica muscularis of the apex, corpus, and radix. Taken together, this study provides new insight into the tongue morphology of Gekko gecko and is dominated by mechanical papillae on the tongue surface.
Biotransformation of n-butanol to Fruity-Like Bio-Flavour by Indonesian Lactic Acid Bacteria Setiyoningrum, Fitri; Adi, Deddy Triyono Nugroho; Priadi, Gunawan; Wibowo, Des Saputro; Octaviana, Senlie; Afiati, Fifi; Fidriyanto, Rusli; Prasetyo, Doni Dwi; Siregar, Abdul Rahman; Vincentlau, Dharma
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 4 (2024): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.93537

Abstract

Microbial production of aroma compounds is a promising alternative to extracting plants or chemical synthesis. In our research, the Indonesian lactic acid bacteria (LAB) have been utilised as producing fruity-like bio flavour by biotransformation approach using n-butanol as a precursor. The aims of our research are to identify LAB- secondary metabolites categorised fruity-like bio flavour and investigate the changes of glucose, mannitol, xylose, lactic acid and acetic acid in growth medium after fermentation. Our result research showed that n-butanol could be transformed to several fruity like bio flavour such as ethyl butyrate, butyl acetate, butyl formate, ethyl 2-methylbutanoate, ethyl 3-methylbutanoate, 2-heptanone, butyl propanoate, butyl propanoate, butyl 2-methylbutanoate, butyl isovalerate, butyl pentanoate, and butyl hexanoate. All of LABs consumed above 75% of glucose and only Lactococcus lactis KGB1 consumed all the mannitol on fermentation medium. In addition, Lactococcus lactis KGB1 produced the highest xylose, 11.87 g/L LABs produced. Based on the amount of fruity-like bio flavour compound generated, Lactobacillus fermentum WKS2, Lactobacillus fermentum KGL2, Lactococcus lactis KK4, Lactobacillus fermentum WKS3, Lactococcus lactis KGB1, and Lactobacillus fermentum KGL7 could be considered as agent fruity-like bio flavour by biotransformation approach.
Bioerosion in the Late Eocene Discocyclina discus sowerbyi (Nuttall, 1926) in Bayat Area, Indonesia: Implications for Paleoecology Rahmawati, Diana; Surjono, Sugeng Sapto; Barianto, Didit Hadi; Rahardjo, Wartono
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 4 (2024): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.93779

Abstract

This paper discusses about the bioerosion discovered in carbonate tests of Discocyclina discus sowerbyi (Nuttall, 1926), a large benthic foraminifera from the Priabonian (Late Eocene). The study material was sampled from the Gamping beds in the Wungkal-Gamping Formation in Bayat, Indonesia. We discovered four bioerosional trace fossils from three different ichnogenera demonstrate bioerosion from the surface test analysis. Oichnus simplex and Oichnus paraboloides are ichnogenus Oichnus diagnostic drilling holes that are often found on the surface. Caulostrepsis isp. exhibits the presence of uncomplicated U-shaped borings. The observed formation of drill holes can be mostly linked to the predatory behaviour of gastropods, while other trace fossils are predominantly associated with the burrowing activities of worms. The occurrence of well-preserved individual tests exhibiting no signs of bioerosion is infrequently observed in D. discus sowerbyi. In addition, bioerosion occurs more frequently in the microspheric generation than in the megalospheric generation. This research also demonstrates for the first time in Indonesia that parrotfish bite marks have developed on individual tests of the microspheric generation of D. discus sowerbyi. The taphonomic characteristics exhibited by the bioeroded and encrusted D. discus sowerbyi specimens can serve as reliable paleoecological indicators for sediment deposition occurring at an intermediate to high sedimentation regime. The occurrence of larger foraminifera with some bioerosional trace fossil highly proficient at documenting shallow marine sclerobionts. 
The First Record of an Hourglass Toad (Leptophryne borbonica) in The Core Zone of Bromo Tengger Semeru National Park and Its Ecological Aspects Hanifa, Berry Fakhry; Fadhilah, Muhamad Aslam; Devi, Sandra Rafika; Hasyim, Muhammad Asmuni; Septiadi, Luhur
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 4 (2024): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.93938

Abstract

Leptophryne borbonica is an amphibian species known for its sensitivity to environmental changes. Within the expansive Bromo Tengger Semeru National Park (TNBTS), new occurrences of L. borbonica have been discovered for the second time in another region of TNBTS (core area in Ireng-Ireng Block, Lumajang). This research provides the newest finding of L. borbonica and insights into the habitat assessment and potential food preferences of L. borbonica within TNBTS. The methodology involved the examination of morphology and meristics in L. borbonica. Habitat assessment and potential food indicated stable values. However, continued vigilance is essential due to vulnerability to volcanic threats.
Planktonic Foraminifera Biostratigraphy of the Pliocene Kintom and Bongka Formation, Central Sulawesi, Indonesia Novian, Moch. Indra; Barianto, Didit Hadi; Husein, Salahuddin; Surjono, Sugeng Sapto
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 4 (2024): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.94685

Abstract

The Pliocene sediments exposed in the eastern arm of southern Sulawesi consist of Kintom and Bongka Formations, thought to be the result of collisions in the Middle Miocene. The research area is located along the Matindok – OndoOndolu road, Banggai Regency, Central Sulawesi Province. The aims of the research is to determine the rock units that developed in the Kintom – Bongka Formation and determine the chronological time frame based on planktonic foraminifera biostratigraphy. This research used stratigraphic measurement on a scale of 1:100 and Plio-Pleistocene planktonic foraminifera biostratigraphy. A lithological column along 315 meters divided into three rock units. The marl unit and calcareous sandstone unit show characteristics similar to flysch deposits from the collision and are part of the Kintom Formation. Intergrade conglomerate gravelly sandstone deposited unconformably on top of the previous unit is part of the Bongka Formation. This last unit shows characteristics similar to molasse deposits. In total of 46 rock samples were analyzed for foraminifera biostratigraphy. Seven foraminifera biozones showing the age of rock deposition from the Early Pliocene to the Late Pleistocene.The order of the foraminifera biozone is Globorotalia tumida Brady LOZ (PL1a; 5.59 - 4.45 Ma), Globoturborotalita nepenthes Todd CRZ (PL1b; 4.45 - 4.39 Ma), Globotalia acostaensis Blow PRZ (PL2a; 4.39 – 4.31 Ma), Globotalia margaritae Bolli HOZ (PL2b; 4.31 - 3.85 Ma), Sphaeroidinellopsis seminulina Schwager HOZ (PL 3-4; 3.85 – 3.20 Ma), Globorotalia (M) miocenica Palmer/Globorotalia miocenica Palmer HOZ (PL5–6; 3.20 – 2.30 Ma), and Pulleniatina praecursor Banner & Blow HOZ (PL6–PT1a; 2.30 – 2.26 Ma).

Page 33 of 33 | Total Record : 327

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