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Advances in Tropical Biodiversity and Environmental Sciences
Published by Universitas Udayana
ISSN : 25496980     EISSN : 26220628     DOI : https://doi.org/10.24843/ATBES.2023.v07.i02.p01
Core Subject : Health, Science, Education, Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Environmental Science Immunology & microbiology Medicine & Pharmacology Veterinary Other
The scope of the journal covers scientific and technological aspects from all fields that have general relevance to tropical biodiversity and environmental sciences, including investigations on tropical biodiversity, systematics and taxonomy, terrestrial and aquatic ecology, wildlife management and control, ethnobotany and ethnozoology, tropical plant and animal cultivation, general veterinary, natural product chemistry, ecotourism, environmental remediation and management, and geographic information systems (GIS), remote sensing, and other modeling applications for environmental studies.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 78 Documents
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Identification of Microplastics in Three Fish Species in Tondano Lake, Minahasa, Indonesia Fernando Andre Watung; Alva Sahiri Alexander Supit; Merry Triastuti Gosal
Advances in Tropical Biodiversity and Environmental Sciences Vol. 9 No. 2 (2025): June 2025
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2025.v09.i02.p04

Abstract

Microplastic pollution is a significant threat to aquatic ecosystems and human health, particularly in Indonesia, a major contributor to plastic waste. This study investigated the presence and characteristics of microplastics in three commonly consumed fish species from Tondano Lake, North Sulawesi: mujair (Oreochromis mossambicus), payangka baru (Oxyeleotris marmorata), and payangka lama (Ophiocara poropechala). Analysis of gills and gastrointestinal tracts (GIT) from 11 fish samples revealed microplastic contamination in all species. Mujair exhibited the highest microplastic abundance, predominantly fragments in both gills and GIT. Payangka baru showed more fibers in the GIT and fragments in the gills, while payangka lama had more fibers in the GIT and fragments in the gills. A positive correlation was observed between fish body weight and microplastic accumulation in the GIT, but not the gills. The findings confirm microplastic contamination in Tondano Lake fish, highlighting the need for stricter waste management and further research on human health implications.
Effectiveness Test of Immobilization of Aspergillus niger Fungi with Different Biomass on Hexavalent Chromium (Cr VI) in Water Anisa Fitriawati; Ima Yudha Perwira; Devi Ulinuha
Advances in Tropical Biodiversity and Environmental Sciences Vol. 9 No. 3 (2025): October 2025
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2025.v09.i03.p07

Abstract

Heavy metal contamination with Cr(VI) in aquatic environments is a serious concern due to its high toxicity and mobility. This research aimed to evaluate the effectiveness of immobilized Aspergillus niger in sodium alginate with different biomass concentrations (0 g, 0.1 g, 0.3 g, and 0.5 g) in reducing Cr(VI) content in water. The research was conducted from March to May 2025 using a quantitative experimental method with a Completely Randomized Design (RAL), consisting of four treatments and three replications. The bioremediation process lasted 5 days, and Cr(VI) concentration was measured using a UV-Vis spectrophotometer at 540 nm, with the data analyzed in Microsoft Excel. The results indicated that each biomass treatment exhibited varying levels of Cr(VI) removal. The treatments T3, T1, T2, and T0 (control) showed the highest to lowest effectiveness, with values of 39.4%, 32.4%, 30.7%, and 28.0%, respectively. The rate of Cr(VI) reduction increased with increasing fungal biomass, but not in a straight line across all treatments. The metal removal process occurred through biosorption and bioaccumulation mechanisms, influenced by factors such as initial metal concentration, particle size, and the availability of functional groups on the fungal cell wall and alginate matrix. This study demonstrates that immobilized Aspergillus niger can reduce Cr(VI) content in water, although its effectiveness is not yet optimal.
Exopolysaccharides-Producing Lactic Acid Bacteria in Marinated Pakoba (Syzygium luzonense Merr.) Fruit Revanda Stevanie Hasani; Helen Joan Lawalata; Anita Constanci Christine Tengker; Marthy Stella Taulu; Fernando Andre Watung
Advances in Tropical Biodiversity and Environmental Sciences Vol. 9 No. 3 (2025): October 2025
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2025.v09.i03.p06

Abstract

Pakoba fruit is one of the endemic flora of North Sulawesi which is rich in nutrients and has the potential to be fermented. The fermentation process occurs due to the bacteria in the fruit, including lactic acid bacteria (LAB). One of the interesting products from LAB fermentation is that it can produce secondary metabolites which have the potential to produce exopolysaccharides, namely high molecular weight and biodegradable polymers. This research aims to determine whether LAB can be obtained from fermentation of Pakoba marination and what types of LAB produce exopolysaccharides based on their phenotypic characteristics. This research uses a qualitative descriptive method to characterize the type of LAB and observe the exopolysaccharides produced by the bacteria. This research succeeded in isolating and identifying 10 LAB isolates based on their morphological and biochemical characters. Four isolates named MP(1)5.2, MP(1)7.1, MP(3)6.3, MP(3)7.2 can produce exopolysaccharides with a soft character but not mucus, where bacterial exopolysaccharides are believed to increase probiotics in the digestive tract. Genus level recognition (generic assignment) based on profile matching revealed that these four bacteria were from the genus Lactobacillus.
Chromium (Cr) Content In Water, Gills, and Muscles of Tilapia Fish (Oreochromis niloticus) in Tukad Badung, Bali Sebayang, Alfani; Sari, Alfi Hermawati Waskita; Kartika, Gde Raka Angga
Advances in Tropical Biodiversity and Environmental Sciences Vol. 10 No. 1 (2026): February 2026 (in progress)
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2026.v10.i01.p03

Abstract

Increased human activity along the Tukad Badung River affects the quality of the river's water. One of the causes is waste from various anthropogenic activities containing heavy metals, which can affect the quality of water and the organisms living in it. The purpose of this study was to determine the chromium (Cr) content in water and tilapia (Oreochromis niloticus). The study was conducted in the Tukad Badung River from February to March 2023. The sampling technique used the time-composite and sample-composite methods. The results of the study showed that the Tukad Badung waters were not polluted, as the Cr content did not exceed the thresholds set by Government Regulation of the Republic of Indonesia No. 82 of 2001 and Bali Governor Regulation No. 8 of 2007. Meanwhile, the Cr content in the muscles of tilapia at station II was 0.036 mg/L, and at station III, it was 0.727 mg/L in the muscles and 2,220 mg/L in the gills. The highest Bioconcentration Factor (BCF), which was found in the gills of tilapia, was 74, but the level of Cr accumulation ability at all stations in the Tukad Badung waters was still classified as a low accumulative category.
Effect of Palmyra Fruit Water–Egg Yolk Diluent with Moringa Leaf Extract on Boar Sperm Membrane Integrity and Motility Gorda, I Wayan; Toli, I Putu Gde Pradnya Nolan; Bebas, Wayan
Advances in Tropical Biodiversity and Environmental Sciences Vol. 10 No. 1 (2026): February 2026 (in progress)
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2026.v010.i01.p02

Abstract

This study aimed to evaluate the effect of palmyra fruit water–egg yolk diluents supplemented with moringa (Moringa oleifera L.) leaf extract on the intact plasma membrane, intact acrosomal membrane, and motility of boar spermatozoa during liquid storage. A completely randomized design was used, with seven diluent formulations varying in concentrations of egg yolk and moringa leaf extract. Each treatment was replicated four times and stored at 15-18°C for up to 72 hours. Semen quality was evaluated at 0, 24, 48, and 72 hours of storage. Data were analyzed using analysis of variance followed by Duncan’s multiple range test. Both diluent formulation and storage duration significantly influenced all semen quality parameters (p < 0.05). The diluent containing palmyra fruit water supplemented with 20% egg yolk and 15% moringa leaf extract produced the highest membrane integrity, motility, and viability with the lowest abnormality rate. The semen maintained acceptable quality for artificial insemination for up to 48 hours of storage. The superior performance of this formulation is biologically associated with the synergistic interaction between carbohydrate-derived energy from palmyra fruit water, phospholipid-mediated membrane stabilization from egg yolk, and antioxidant protection from moringa leaf extract against oxidative stress.
Analysis of Abundance and Composition of Culturable Bacteria and Their Relationship with Water Quality Parameters in Intensive Shrimp Ponds Setiabudi, Gede Iwan; Antara, Kadek Lila; Fain, Hamdanul; Ismet, Meutia Samira
Advances in Tropical Biodiversity and Environmental Sciences Vol. 10 No. 1 (2026): February 2026 (in progress)
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2026.v10.i01.p01

Abstract

Intensive cultivation of Pacific white shrimp (Penaeus vannamei) is a crucial pillar of the aquaculture economy, but it faces sustainability challenges due to water-quality degradation driven by microbial activity. This study aims to analyze the total bacterial count (TBC) and total Vibrio count (TVC), identify the dominant culturable bacterial genera, and determine their statistical relationship with physicochemical water quality parameters in intensive shrimp ponds. The research methodology included regular sampling of water and sediment over one cultivation cycle. Water quality was analyzed using standard methods, while bacterial enumeration was performed using the spread plate technique on Marine Agar and Thiosulfate Citrate Bile Salts Sucrose Agar media. Pearson's correlation analysis was used to test the relationship between variables. The results show that some water quality parameters, particularly ammonia and TOM, tended to increase and exceed the SNI 01-7246-2006 quality standard as the cultivation cycle progressed. The abundance of TBC and TVC in sediment (average 106−107CFU/g) was significantly higher than in the water column (average 104−105 CFU/mL). Correlation analysis revealed a strong and significant negative relationship between DO and TBC (r=−0.85, p<0.01) and TVC (r=−0.79, p<0.01). Conversely, a strong and significant positive correlation was found between TOM and TBC (r=0.91, p<0.01) and TVC (r=0.88, p<0.01), as well as between ammonia and both TBC and TVC. It is concluded that the abundance of culturable bacteria, especially TBC and TVC, serves as a sensitive biological indicator of organic load and ecological stress in intensive pond systems. The strong predictive relationship between these microbial metrics and key parameters, such as DO and TOM, underscores the importance of microbiological monitoring for proactive management and improved sustainability in aquaculture.
Identification of Endophytic Bacteria from Water Hyacinth (Eichhornia crassipes) in Lake Tondano as Potential Agents for Lead Bioremediation Worang, Margi; Lawalata, Helen J.; Tengker, Anita; Roring, Verawati; Posumah, Dany; Rampengan, Mercy
Advances in Tropical Biodiversity and Environmental Sciences Vol. 10 No. 1 (2026): February 2026 (in progress)
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2026.v10.i01.p04

Abstract

Water hyacinth (Eichhornia crassipes) is a herbaceous plant known to accumulate heavy metals from polluted waters. In Lake Tondano, this plant grows abundantly and helps reduce lead (Pb) levels through bioremediation. This study aimed to identify the genera of endophytic bacteria from water hyacinth (E. crassipes) that have potential as bioremediation agents for lead. This study employed an exploratory, descriptive, quantitative laboratory approach. Samples were collected from E. crassipes plants found in Lake Tondano at three different locations. The isolation method used was direct plating. The research stages included bacterial isolation, lead resistance testing at 50 ppm, lead reduction testing at 10, 20, and 30 ppm, lead concentration analysis, and bacterial identification using morphological and biochemical tests. Three isolates (EG.A1.5, EG.A2.4, and EG.D3.4) were found to be resistant and capable of reducing lead levels. The reduction percentages reached 35.9%, 72.2%, and 55.5%, respectively. Based on morphological and biochemical characteristics, the bacterial genera of three isolates were identified as Salmonella, Enterobacter, and Bacillus.
Socio-Economic Domain Assessment of the EAFM Approach in the Bullet Tuna Fishery at Prigi Nusantara Fishing Port (PPN), Trenggalek, East Java Aguspriyani, Anggita Nur; Restu, I Wayan; Saraswati, Suprabadevi Ayumayasari; Negara, I Ketut Wija
Advances in Tropical Biodiversity and Environmental Sciences Vol. 10 No. 1 (2026): February 2026 (in progress)
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2026.v10.i01.p05

Abstract

The capture fisheries landed at the Nusantara Fishing Port (PPN) in Prigi, Trenggalek, East Java, play a strategic role in influencing the social and economic conditions of fishing households. The production of bullet tuna is highly volatile, which in turn impacts these socio-economic conditions. This study aims to analyze the assessment of the social and economic domains in the implementation of EAFM for the bullet tuna fishery at PPN Prigi. It employs a qualitative method using the Ecosystem Approach to Fisheries Management (EAFM), which integrates social and economic aspects as a potential solution to achieve sustainable fisheries management and improve fishers' welfare. Data collection techniques included field observations and interviews with 98 fishers who use purse seine and Danish seine gear. The findings indicate that the social domain is rated as 'good' with a composite score of 66. This rating is characterized by a low potential for conflict, which is crucial to maintain, although stakeholder participation and the utilization of local knowledge are not yet optimal. The economic domain was classified as "moderate" with a score of 53, attributed to low ownership of productive assets and highly vulnerable income levels, which limit fishers' capacity to save. It is recommended that the government address the socio-economic vulnerabilities of fishers in an integrated manner, by strengthening regulation and mediation to mitigate potential conflicts, while simultaneously initiating productive asset assistance and business diversification programs supported by financial literacy.

Page 8 of 8 | Total Record : 78

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