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All Journal JURNAL PIJAR Jurnal Biologi Tropis Biosaintifika: Journal of Biology & Biology Education Jurnal Pengabdian Magister Pendidikan IPA Kappa Journal Jurnal Pengabdian Masyarakat Sains Indonesia (Indonesian Journal Of Science Community Services) Jurnal Ilmiah Profesi Pendidikan Journal of Classroom Action Research Jurnal Inovasi Pendidikan dan Sains Bioscientist : Jurnal Ilmiah Biologi NUSRA: Jurnal Penelitian dan Ilmu Pendidikan Jurnal Pijar MIPA
Agil Al Idrus, Agil Al
Pendidikan Biologi FKIP Universitas Mataram
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Immunology & microbiology Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Journal : Jurnal Biologi Tropis

 1 
Diversity of Mollusks (Gastropods and Bivalves) in The Bagek Kembar Mangrove Ecosystem Essential Area, Sekotong Handrayani, Handrayani; Idrus, Agil Al; Jamaluddin, Jamaluddin
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9454

Abstract

The Bagek Kembar Mangrove Ecosystem Essential Area (EEA) in West Lombok is a critical habitat that supports various aquatic organisms, including mollusks. This study aimed to identify and analyze the diversity of mollusks from the classes Gastropoda and Bivalvia, within the Bagek Kembar mangrove ecosystem. Sampling was conducted from February to April 2025 using the quadrat transect method, and data were analyzed using the Shannon-Wiener diversity index (H′), Pielou’s evenness index (E), and Simpson’s dominance index (C). A total of 2,368 individual mollusks were recorded, comprising 20 species: 16 Gastropods and 4 Bivalves. The family Potamididae from the class Gastropoda was the most dominant, with Cerithidea cingulata being the most abundant species. Gastropods exhibited moderate diversity (H′ = 2.20), high evenness (E = 0.79), and low dominance (C = 0.15), while Bivalves showed low diversity (H′ = 0.61), moderate evenness (E = 0.44), and moderate dominance (C = 0.70). These results indicate that mollusk diversity in the area is at a moderate level. The findings highlight the importance of mangrove ecosystems in maintaining mollusk diversity and support their use as bioindicators in environmental monitoring and local conservation strategies.
Mangrove Diversity in Pare Mas Jerowaru, East Lombok Herlita, Mesi; Idrus, Agil Al; Syukur, Abdul
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9520

Abstract

The purpose of study is to determine the diversity of mangrove species in Pare Mas Jerowaru East Lombok. Data collection in this study was carried out using the drone check method and a combination of line and square transect methods measuring 2 x 2 m (seedling category), 5 x 5 m (pile category), 10 m x 10 (pole category), and 20 m x 20 m (tree category). Data analysis was carried out by calculating frequency, density, closure area, important value index, Shanon-Wiener diversity index (H'), uniformity index and dominance index. Mangrove species found in the mangrove area in Pare Mas are 233 individuals, consisting of 3 species belonging to 3 families. The value of  mangrove species diversity index in mangrove area in Pare Mas, Jerowaru, East Lombok is 0.743, uniformity index value is 0.676, dominance index value is 0.507, of 3 research transects of Rhizophora Apiculata and Sonneratia Alba species have highest frequency value of 0.8 ind/m². The highest density is owned by seedling category of 1,708 ind/m2, followed by sapling category of 1,187 ind/m2. Conclusion that the value of the mangrove species diversity index in Pare Mas Village is in the low category of 0.743. The highest species diversity index was found in transect 2 with a diversity index value of 0.797 and lowest in transect 3, which was with a value of 0.642.
Isolation and Characterization of Cellulolytic Bacteria from Mangrove Leaf Litter in Bale Mangrove Ecosystem Aulia, Fitri; Idrus, Agil Al; Rasmi, Ayu Citra
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9940

Abstract

This study aimed to isolate and characterize cellulolytic bacteria from mangrove leaf litter in the Bale Mangrove ecosystem, East Lombok. A descriptive-explorative method was employed involving serial dilution, CMC agar culture, morphological and biochemical identification, Gram staining, and qualitative cellulase activity testing using Congo red. A total of 15 bacterial isolates were obtained and analyzed. All isolates were Gram-positive, predominantly rod-shaped (bacilli), and exhibited varied colony morphologies. Biochemical tests revealed diverse metabolic capabilities, and seven isolates demonstrated cellulolytic activity, with isolate P2.2 showing the highest cellulolytic index (IS = 3.78). The findings indicate the presence of highly active cellulolytic bacteria in local mangrove litter with potential roles in natural cellulose degradation. This research confirms the ecological relevance of local microbial diversity and suggests further exploration of their enzymatic potential for biotechnology and environmental management.
Diversity and Abundance of Phytoplankton in the Coastal Waters of Batu Kijuk Sekotong, West Lombok Nadiyah, Nurfadhilah; Idrus, Agil Al; Japa, Lalu
Jurnal Biologi Tropis Vol. 24 No. 1 (2024): Januari - Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v24i1.6567

Abstract

Sekotong is a region in the West Nusa Tenggara Province, characterized by its coastal area with significant potential natural resources for marine fisheries. The feasibility of water quality for marine aquaculture can be assessed through quantitative and qualitative tests on the biota inhabiting a water body, such as phytoplankton. This research aims to determine the abundance and diversity of phytoplankton in the coastal waters of Batu Kijuk. A 20 μm plankton net was used to filter seawater samples taken as much as 100 L of water. Preserving water samples using formalin with a concentration of 4%. Data analysis uses calculations of individual abundance, species diversity and dominance index. The random sampling method was used to determine the sampling location. The research results mean the average abundance of phytoplankton is 256,667 Ind/L. The species diversity index (H'=2.41) was grouped into an intermediate index and a species dominance index (C=0.13). The research results showed that the phytoplankton community identified in Batu Kijuk Beach waters consisted of 4 classes and 36 species.
Distribution Patterns of Beautiful Beetle Species in Suranadi Nature Park, Lombok, Indonesia Ilhamdi, Mohammad Liwa; Idrus, Agil Al; Santoso, Didik; Raksun, Ahmad; Syazali, Muhammad
Jurnal Biologi Tropis Vol. 24 No. 1b (2024): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v24i1b.7887

Abstract

Beautiful beetles are a group of insects that play an important role in maintaining ecosystem balance, ecotourism and education. Suranadi Nature Park, as one of the conservation areas in Indonesia, has great potential in maintaining the biodiversity of these insects. However, information on the dispersion pattern of beautiful beetle species in this area is still very limited so this research is important. The data collection method was carried out by survey, by capturing and directly documenting the beetles encountered during the exploration of the forest of TWA Suranadi. Data collection was carried out in June 2024 on the edge, middle of the forest and waterways. The samples obtained were brought to the Biology Education laboratory of FKIP Unram for identification. The results showed that the distribution pattern of beautiful beetles in Suranadi Nature Tourism Park has three distribution patterns, namely group distribution patterns of 21%, Uniform 72% and random distribution patterns 7%. In conclusion, the distribution pattern of beautiful insects in Suranadi Nature Park is different. The dominant uniform distribution pattern, then the group distribution pattern and the least random distribution pattern.
Mangrove Structure and Composition Analysis in Teluk Jor, East Lombok Regency Akbar, Lalu Faraby Alif; Idrus, Agil Al; Mahrus, Mahrus; Santoso, Didik
Jurnal Biologi Tropis Vol. 24 No. 2b (2024): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v24i2b.8253

Abstract

The presence and sustainability of mangrove plants can be inferred from the species' composition and organization within a forest region. The goal of this study is to ascertain the environmental conditions of the mangrove ecosystem in the Teluk Jor region of East Lombok Regency, as well as the diversity index of mangrove species and the structure and composition of the mangrove vegetation. Purposive sampling is used in this descriptive exploratory study design, and data is gathered utilizing transects and quadrants. The results of the research found 7 types of mangroves with 4 families namely the rhizophoraceae family (Rhizophora mucronata, Rhizophora apiculata and Ceriops tagal), the sonneratiaceae family (Sonneratia alba and Sonneratia caseolaris), the avicenniaceae family (Avicennia marina) and the combretaceae family (Lumnitzera racemosa). Sonneratia alba has a relative frequency (FR) value of 63.16%, relative density (KR) of 80.33%, and the highest relative dominance of 78.84% followed by Rhizophora apiculata, Sonneratia caseolaris and Avicennia marina. Seven mangrove species and four families with the greatest important value index belong to Sonneratia alba, according to the research's findings. The sapling category's diversity index was categorized as medium, while the tree category's diversity index was categorized as low.
Co-Authors Abdul Syukur Agus Ramdani Ahmad Harjono Ahmad Raksun, Ahmad AHMADI Akbar, Lalu Faraby Alif Asrin Asrin Baiq Sri Handayani Didik Santoso Earlyna Sinthia Dewi Fitri Aulia Handrayani, Handrayani Hasanah, Yunia Rizkiana Herlita, Mesi I Wayan Gunada I Wayan Mertha I. G. M. R. Aryana, I. G. M. R. Ilhamdi, M. Liwa Ilhamdi, Mohammad Liwa Ilhamdi, Mohammad Liwa Jamaluddin Jamaluddin Joni Rokhmat Kusmiyati Kusmiyati Kusuma, Anindita SHM Kusuma, Anindita Suliya Hangesti Mandra Lalu Japa, Lalu LALU ZULKIFLI Lestari, Tri Ayu Listantia, Nora Mahrus Mahrus Mahrus, Mahrus Moh. Liwa Ilhamdi, Moh. Liwa Muh. Makhrus Muh. Zaini Hasanul Muttaqin Mukminah, Mukminah Munib Munib, Munib Mustari, Mohamad Nadiyah, Nurfadhilah Ni Nyoman Sri Putu Verawati Nirmala, Siska Ayu Nur Lestari Nurmawaddah, Yenny Putu Artayasa Rasmi, Ayu Citra Seftiana, Irma Sri Idawati Sudirman Sudirman Sukarso, Aa Susilawati, Susilawati SUYANTRI, ENI Syauki MS, Lalu Syauki, Lalu Syazali, Muhammad Wirajagat , Cahyadi Wirajagat, Gde Cahyadi Yahdi, Yahdi