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Reza Dino Mahardika
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INDONESIA
Bioma : Jurnal Biologi Indonesia
Published by Universitas Negeri Jakarta
ISSN : 01263552     EISSN : 25809032     DOI : https://doi.org/10.21009/bioma.v21i2
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Bioma is a national peer-reviewed and open access journal that publishes significant and important research from all area of biosciences fields such as biodiversity, biosystematics, ecology, physiology, behavior, genetics and biotechnology.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ecology, Evolution, Behavior and Systematics
Articles 153 Documents
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Comparative analysis of pollen morphology at three flowering stages of Trimezia martinicensis (Jacq.) Herb. (Iridaceae), an invasive species in Indonesia Alda Wydia Prihartini Azar; Isnaeni Nur Ardianti; Hasna Dyah Kusumardani; Sri Lestari; Riska Desi Aryani
Bioma Vol. 21 No. 2 (2025): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v21i2.55503

Abstract

Pollen morphology provides critical insights into plant reproduction, taxonomy, and evolutionary relationships. This study investigates pollen development in Trimezia martinicensis (Iridaceae), an invasive alien species in Indonesia, across three flowering stages: closed bud, developed bud, and mature flower. Vegetative and floral traits were documented alongside stage-specific palynological analyses. Pollen grains were examined under light microscopy to assess changes in orientation, shape, aperture, and exine architecture. Results revealed distinct morphological transitions, including spheroidal grains with monocolpate apertures at early stages, progressing to more rounded forms with refined wall structures in mature flowers. These findings highlight the dynamic nature of pollen morphology during anthesis and underscore its relevance for reproductive biology, taxonomy, and management of IAS in Indonesia.
Anura diversity and distribution at the three anthropogenic habitat areas of the IPB Dramaga Campus, West Java, Indonesia Chairunisa Anwar; Nur Azizah Maulidiyah Rahma; Ninda Luqya Nakadira; Septiany Anugrah Kadang; Rahmat Agung Munggaran; Puji Rianti
Bioma Vol. 21 No. 2 (2025): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v21i2.55973

Abstract

Anura, a group of amphibians widely distributed in freshwater and terrestrial ecosystems, has been understudied regarding its diversity and distribution patterns in urban terrestrial settings. This study aims to identify the species composition, diversity, evenness distribution patterns and  environmental correlates of Anura across three differing disturbance level areas within the IPB Dramaga campus in Bogor. Data was collected using the Visual Encounter Survey method. The results indicate that Anura distribution across the three habitats tends to be clustered, comprising 199 individuals from six species and four families. Duttaphrynus melanostictus dominated habitats with high disturbance levels, highlighting its ecological significance as a tolerant species capable of surviving and dominating amphibian communities in disturbed areas. Conversely, the low-disturbance area exhibited the highest species diversity (H′ = 1.13) and evenness (E = 0.63) compared to the other two habitats, supported by an average soil pH of 5.09 and soil moisture of 59.8%. Environmental factors and human activities likely influenced differences in community structure. These findings emphasize the importance of maintaining diverse microhabitats in urban areas to support the persistence of both disturbance-tolerant and sensitive amphibian species.
Exploring butterfly diversity in urban landscapes: A case study from Depok, Indonesia Reza Dino Mahardika; Nafidza Nur Shabrina; Syafiq Alan Setyawan; Mohamad Isnin Noer
Bioma Vol. 21 No. 2 (2025): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v21i2.64032

Abstract

Depok City is one of Jakarta's satellite cities with a high level of urbanisation that is reducing the living space for butterflies. Green open spaces (GOS) play an important ecological role and have the potential to become habitats for a diverse range of butterfly species in urban areas. The existence of GOS has the potential to provide food plants and environmental preferences that support the living space of butterflies. Research needs to be conducted to determine the potential of these GOS as habitats for butterfly diversity in urban areas. This study aims to determine the diversity, abundance, density, and evenness of butterfly species in Depok City's GOS. The study was conducted in five GOS in Depok City using the Visual Encounter Survey (VES) sampling technique. We found Depok’s GOS showed moderate butterfly diversity and species evenness indices with an average density of 10.04 individuals/ha. GOS’s temperature and humidity does not determine the population variables; while light intensity and area sizes significantly related to abundance, Shannon-Wiener’s H’ and density of butterflies. Pielou’s E is not determined by any abiotic variables. Depok’s green spaces show strong promise as refugia supporting butterfly diversity in urban ecosystems.
Comparing cityparks and cemeteries: Which habitat better supports urban bird communities? Nur Muhammad Firmansyah; Ratna Komala; Eka Putri Azrai; Elsa Lisanti; Agung Sedayu
Bioma Vol. 21 No. 2 (2025): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v21i2.65433

Abstract

Urban birds represent the group of organisms adapted to environments characterized by close proximity to human activity. However, disturbances often displacing them to less disturbed habitats. In Jakarta, city parks and cemeteries serve as relatively low-activity green spaces that provide potential refugia for avian communities, thus hold conservation value. This study investigated bird and vegetation diversity in these two types of urban green open spaces (GOS) and examined their relationships the vegetation diversity. Surveys were conducted in four city parks and four cemeteries in circular plots. Results indicated that bird diversity in city parks was moderate, while tree and non-tree diversity ranged from low to moderate. In cemeteries, bird, tree, and non-tree diversity were consistently low to moderate. It is a positive correlation between tree diversity and bird diversity, and a negative correlation between non-tree diversity and bird diversity, though both relationships were not strong. It is also revealed that bird diversity in both city parks and cemeteries differ markedly. These findings highlight the ecological role of urban green spaces in supporting avian diversity and emphasize the importance of vegetation structure in shaping bird communities within highly urbanized landscapes.
Freshwater fish diversity in semi‑urban artificial lakes: A case study from IPB Dramaga Campus, Indonesia Winda Eka Putri; Muhammad Ridwan; Nur Anisa; Astihawa Indah Setiani; Rizki Rahma Hayati; Dyah Perwitasari-Farajallah
Bioma Vol. 22 No. 1 (2026): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v22i1.55659

Abstract

Fish diversity is widely used as an indicator of freshwater ecosystem stability and environmental quality, particularly in semi-urban areas experiencing increasing anthropogenic pressure. This study assessed fish diversity in three artificial lakes on the IPB University Dramaga Campus: Lake LSI, Lake SDGs, and Telaga Inspirasi. Sampling was conducted in April 2025 using a combination of active and passive capture methods. Collected specimens were identified to species level, and diversity was evaluated using the Shannon, Simpson, and evenness indices. A total of 12 fish species from nine families were recorded. Five species were introduced, with Oreochromis niloticus and Poecilia reticulata identified as the dominant taxa. Telaga Inspirasi exhibited the highest Shannon index (1.390) and the lowest Simpson value (0.733), indicating relatively high diversity and low dominance. Lake LSI supported the greatest species richness (10 species) but showed relatively high dominance (Simpson index = 0.581). Lake SDGs displayed the highest evenness value (0.610), reflecting a more balanced distribution of individuals. Environmental parameters at all sites remained within suitable ranges for fish survival. These findings highlight differences in fish community structure among lakes and emphasise the importance of ecological monitoring for freshwater biodiversity management.
Bioprospecting secondary metabolites from Streptomyces sp. HPM-9-01/B9-A from South Kalimantan as a potential antibiotic candidate Dwi Ariyanti; Maya Fitriana; Ali Budhi Kusuma; Matin Nuhamunada; Nurul Izzati; Aulia Reski Widyaningrum
Bioma Vol. 22 No. 1 (2026): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v22i1.60548

Abstract

Actinobacteria of the genus Streptomyces are widely recognised as a major reservoir of antibiotics. These bacteria occur abundantly in diverse environments, including soil, freshwater, and marine ecosystems. In this study, we employed isolation, characterisation, and analytical approaches encompassing morphological, genomic, and metabolomic techniques to investigate the potential of isolate HPM-9-01/B9-A, obtained from a pine forest in Mentaos, South Kalimantan, as a candidate for antibiotic production. Morphological characterisation combined with 16S rRNA sequencing identified the strain as Streptomyces albulus. Antibacterial assays demonstrated inhibitory activity against five pathogenic bacteria, with a strong inhibition zone of 16.75 ± 2.50 mm observed for Salmonella typhimurium. LC-MS analysis, supported by secondary metabolite identification using MassLynx and ChemSpider, revealed three major compounds: C10H16N7O2, C12H18NO3, and C17H21N4O5. These metabolites are predicted to possess antibacterial and neuroactive properties. Collectively, these findings highlight the promising potential of Streptomyces sp. isolate HPM-9-01/B9-A as a source of novel antibiotic compounds.
Foliar water uptake and diurnal water recharge-discharge cycle in Pyrrosia piloselloides (L.) M.G.Price (Polypodiaceae) Nur'ain; Adisyahputra; Reni Indrayanti; Agung Sedayu
Bioma Vol. 22 No. 1 (2026): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v22i1.66448

Abstract

Water availability strongly constrains epiphytic plants, which lack direct access to soil water. To maintain physiological function under these conditions, many epiphytes rely on foliar water uptake (FWU) as a supplementary water source. This study examined FWU capacity and diurnal water dynamics in the epiphytic fern Pyrrosia piloselloides by analysing changes in leaf thickness as a proxy for water recharge and discharge. Leaf thickness was recorded every two hours over 48 hours in nine individuals, and FWU was quantified using seven leaves per individual. FWU increased leaf water content by 0.44–1.37%. Leaf thickness declined during daytime with increasing temperature and decreasing humidity, and increased at night under cooler, more humid conditions. Overall, leaf thickness decreased by approximately 14.11% during the light period. These results demonstrate that P. piloselloides is capable of foliar water uptake and exhibits pronounced diurnal fluctuations in leaf water status, reflecting dynamic ecophysiological responses to environmental variation.
Organ-specific accumulation of microplastics in Holothuria atra Jaeger, 1833 (Holothuriidae) from Kepulauan Seribu, Indonesia Hanum Isfaeni; Reza Dino Mahardika; Samuel Darell Tohonan Sihite; Muhammad Naufal Al Ghazali; Keenan Garcianov Lasamahu; Ardestia Dwi Alindra Syahrial; Siti Muthi’ah Fairuz Saniyyah; Unaisah Syahidah; Riyani Yahya; Ahmad Dwi Susilo
Bioma Vol. 22 No. 1 (2026): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v22i1.66450

Abstract

Microplastics represent a major threat to tropical marine ecosystems in Indonesia. This study investigated the spatial and organ-specific accumulation of microplastics in Holothuria atra collected from Pulau Tidung Kecil and Pari, Kepulauan Seribu. A total of 28 individuals were analyzed by separating the tentacles, skin, and digestive tract, followed by hydrogen peroxide degradation, density separation, stereomicroscopy, and polymer identification using Fourier Transform Infrared (FTIR) spectroscopy. Statistical analysis was performed with a Gamma Generalised Linear Model (GLM) and Tukey post hoc tests at α = 0.05. Microplastics were detected in all examined organs at both sampling locations. Three microplastic types were identified—fragments, fibres, and pellets—with fragments being the most abundant. The highest microplastic concentration occurred in the digestive tract, particularly in specimens from Pulau Tidung Kecil. GLM analysis showed that island location, body part, and microplastic type significantly influenced microplastic abundance (p < 0.05). FTIR analysis revealed the predominance of polyethylene (PE) and polypropylene (PP), suggesting contamination sources linked to domestic waste and fishing activities. These findings highlight the susceptibility of Holothuria atra to microplastic exposure and suggest its potential utility in monitoring microplastic pollution in tropical coastal ecosystems.
Bird diversity and conservation status in KHDTK Wanadipa research forest, Universitas Diponegoro, Semarang: Ecological buffer implications for Mount Ungaran Mochamad Lutfi Mas'ud; Fuad Muhammad; Jafron Wasiq Hidayat; Sri Puryono; Kasiyati
Bioma Vol. 22 No. 1 (2026): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v22i1.66678

Abstract

The Wanadipa Special Purpose Forest Area (KHDTK) of Diponegoro University in Semarang provides an important refuge for wildlife amid ongoing habitat degradation in Java. This study assessed bird species, abundance, and conservation status in the educational research block and agroforestry rehabilitation zone. Surveys conducted in February 2026 using point count method at five stations recorded 133 encounters of 26 species. The most abundant were the cave swiftlet (25 individuals) and sooty-headed bulbul (17 individuals). Ecological analysis indicated a stable secondary forest ecosystem, with moderate Shannon-Wiener Diversity Index values (H’ = 2.48–2.51), low Simpson Dominance Index (D = 0.11–0.12), and high Evenness Index (E = 0.83–0.87). Five protected species were documented, including the endangered Javan hawk-eagle, alongside the crested serpent-eagle, Javan banded pitta, oriental honey-buzzard, and racquet-tailed treepie. The KHDTK Wanadipa harbors five IUCN and CITES-listed species, comparable to larger Mt. Ungaran (six species) and the Semarang urban forest (six species). These findings highlight the effectiveness of Wanadipa KHDTK as an ecological buffer supporting rare bird conservation in Semarang, Central Java.
Physiological responses and productivity of spinach (Amaranthus tricolor L.; Amaranthaceae) under monoculture and polyculture systems of urban home garden in Yogyakarta Malika Azzahra; Siti Nurul Rofiqo Irwan; Budiastuti Kurniasih
Bioma Vol. 22 No. 1 (2026): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v22i1.67246

Abstract

Spinach (Amaranthus tricolor L.) is an adaptive leafy vegetable suitable for cultivation in urban limited space of home garden (pekarangan). Studies comparing growth responses and productivity of green spinach and red spinach under monoculture and polyculture systems in pekarangan remain scarce. This study aimed to (1) assess growth responses and yield of green spinach and red spinach under monoculture and polyculture systems, and (2) assess the effectiveness of these systems. The experiment was conducted in pekarangan in Pilahan, Rejowinangun, Yogyakarta, from February to March 2025 using a 2×2 factorial Randomised Complete Block Design (RCBD) with three replications. Variables measured included plant height, leaf number, leaf area, biomass, chlorophyll content, and productivity. Results indicated that monoculture and polyculture systems did not significantly influence most growth and productivity parameters. Both spinach cultivars showed similar adaptability under urban hot conditions. Land Equivalent Ratio (LER) analysis revealed that polyculture achieved an LER of 1.09, reflecting a 9% increase in land-use efficiency compared to monoculture. These findings suggest polyculture has potential for application in urban pekarangan to enhance land-use efficiency and crop productivity.

Page 15 of 16 | Total Record : 153

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