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All Journal Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis Jurnal Pengabdian Magister Pendidikan IPA Jurnal Pengabdian Masyarakat Sains Indonesia (Indonesian Journal Of Science Community Services) Jurnal Ilmiah Profesi Pendidikan Jurnal Inovasi Pendidikan dan Sains Bioscientist : Jurnal Ilmiah Biologi Jurnal Warta Desa (JWD) Jurnal Pijar MIPA Current Educational Review Jurnal Pengabdian Masyarakat Tropis Indonesia
Didik Santoso
Fakultas Keguruan Dan Ilmu Pendidikan Universitas Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Morphometric And Meristic Aspects of Lemuru Fish (Sardinella lemuru) Landed on Pancer Beach Banyuwangi Dea Yolanda Aulia Rida; Karnan Karnan; Didik Santoso
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): 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.v26i1.11364

Abstract

Lemuru fish (Sardinella lemuru) is the main small pelagic commodity in the Bali Strait that has high economic value but is vulnerable to pressure on the surface. This study aims to analyze the morphometric and meristic characteristics of lemuru fish landed on Pancer beach, Banyuwangi. The research method used a descriptive survey with stratified random sampling techniques of 50 individuals in the period from October to December 2022.  The results of measurements on 23 morphometric variables showed that the total length was 9 ≤ 19 cm (92%), the standard length was 7 ≤ 17 cm (86%), the body width was 1 ≤ 11 cm (90%), the height of the body was 2 ≤ 10 cm (88%), the height of the tail rod was 1 ≤ 9 cm (84%), the length of the tail rod was 1 ≤ 9 cm (96%), the length of the ventral fin was 1 ≤ 9 cm (90%),  Pectoral fin length 1 ≤ 13 cm (98%), Eye diameter 1 ≤ 9 cm (90%) and weight 10 ≤ 24 g (98%). Meanwhile, the calculation of 14 meristic variables of lemuru fish showed that: Number of Hard Dorsal Radius 2 ≤ 12 (88%), Number of Weak Dorsal Radius 3 ≤ 13 (96%), Number of Hard Anal Fin Fingers 2 ≤ 6 (86%), Number of Weak Anal Fin Fingers 2 ≤ 8 (88%), Number of Scales on Lateral Stripes 54 ≤ 67 (78%), Number of Scales Around the Body 33 ≤ 41 (60%), Number of Scales on Side Lines 5 ≤ 17 (94%),  The number of scales below the side line is 10 ≤ 20 (94%).
The Impact of Bokashi and NPK Fertilizer Applications on Pakchoy (Brassica rapa L.) Growth Ahmad Raksun; Lalu Zulkifli; I Wayan Mertha; Didik Santoso; Moh. Liwa Ilhamdi
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11543

Abstract

The growth of pakchoy is determined by the availability of nutrients around its root system. Research on the effect of bokashi and NPK fertilizer on pakchoy vegetative growth was conducted from May to August 2025. This study aimed to measure the increase in pakchoy growth after being given bokashi and NPK fertilizer. The pakchoy planting experiment was conducted using a completely randomized design with two factors. Pakcoy was planted in experimental pots, given bokashi treatment 3 days before planting and given NPK fertilizer 15 and 22 days after planting. The results of the experiment showed that: (1) the vegetative growth parameters of pakchoy given 1.5 g of NPK fertilizer were significantly different from the control, except for leaf width, (2) the vegetative growth parameters of pakchoy given 1.6 kg of bokashi were significantly different from the control, except for leaf width, (3) The interaction of bokashi and NPK fertilizer did not significantly affect the vegetative growth of pakchoy.
Seagrass Community Structure in the Coastal Waters of Pandanan Sekotong Barat, West Lombok Maulida Suryatni; Didik Santoso; Lalu Japa
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): 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.v26i3.12746

Abstract

Seagrass ecosystems play a crucial role in marine environments, particularly in supporting coastal biodiversity and maintaining ecological balance. The coastal waters of Pandanan Beach are ecologically vital but potentially exposed to anthropogenic pressures such as boat mooring and local foraging ("madak") activities. This study aimed to identify the species composition and analyze the community structure, including density, diversity, dominance, and coverage of seagrass in coastal waters at Pandanan Beach. Data collection were conducted using a quadrate transect method across three distinct transects. The results showed that a total of 7 seagrass species were identified, namely Cymodocea rotundata, C. serrulata, Enhalus acoroides, Halodule pinifolia, Halophila decipiens, Syringodium isoetifolium, and Thalassia hemprichii. The overall community structure of the seagrass was relatively stable and healthy, characterized by a mean total density of 163 ind/m² and an average canopy coverage of 52.28%. The species diversity index (H' = 1.65) fell into moderate category, supported by a low dominance index (D = 0.22), indicating an even distribution of species across the habitat. These findings suggest that despite ongoing human activities, the seagrass ecosystem in the coastal waters at Pandanan Beach remains in a resilient and healthy condition.
Vegetation Structure of Mangroves in Bagek Kembar, Sekotong, West Lombok Vivi Maulida Cahyani; Lalu Japa; Didik Santoso
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): 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.v26i3.12902

Abstract

Mangrove ecosystems play a crucial role in maintaining the ecological balance of coastal environments by supporting biodiversity and protecting shorelines. This study aimed to identify the species composition and analyze the vegetation structure of mangroves in the Bagek Kembar area, Sekotong, West Lombok, Indonesia. The research was conducted in January - May 2026 using a descriptive-exploratory approach with purposive sampling. Vegetation data were collected from 9 quadrats using line transect and quadrat methods. Data were analyzed using the species diversity index (H′), species evenness index (E), species dominance index (D), and Important Value Index (IVI). A total of 306 individuals belonging to five mangrove species were recorded, namely Avicennia marina, Rhizophora apiculata, R. mucronata, R. stylosa, and Sonneratia alba. The species diversity index (H′) was 1.30, indicating moderate diversity, the species evenness index (E) was 0.80, indicating high evenness, and the species dominance index (D) was 0.30, indicating low dominance. Rhizophora mucronata showed the highest Importance Value Index of 115.86, indicating its dominant ecological role in the mangrove community. These findings indicate that the mangrove vegetation in the Bagek Kembar area is in relatively good condition and highlight the ecological importance of the dominant species as a priority for conservation and sustainable mangrove ecosystem management.  
Carbon Content and CO2 Sequestration in the Bagek Kembar Mangrove Essensial Ecosystem Area (EAA), Sekotong, West Lombok Nurlaili Hidayati; Didik Santoso; Eni Suyantri
Jurnal Biologi Tropis Vol. 26 No. 4 (2026): in Progress
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.v26i4.12744

Abstract

Mangrove ecosystems contribute significantly to climate change mitigation because of their capacity to content carbon and sequestration large amounts of carbon dioxide (CO₂). This research was carried out to examine the carbon content and CO₂ sequestration of mangrove forests in the Essensial Ecosystem Area (EEA), Bagek Kembar, Sekotong, West Lombok. Data were collected through by applying a line transect approach in combination with plot based sampling. Carbon content and CO₂ sequestration were calculated using an allometric method based on equations established by the IPCC. Rhizophora mucronata emerged as the dominant species, representing 39.54% of the total number of individuals. The findings demonstrate that the mangrove forest within the Bagek Kembar EEA has a carbon content of  34.56 ton C/ha and CO₂ sequestration of 126.82 CO₂/ha. These findings indicate that the mangrove forest in the EEA Bagek Kembar play a crucial role in carbon content and CO₂ sequestration, thereby contributing to climate change mitigation while serving as a scientific foundation for the sustainable conservation and long term management of mangrove ecosystems.
Echinodermata Community Structure in Seagrass Meadows of Pandanan Beach Sekotong District West Lombok M. Rayfan Fadillah; Didik Santoso; Eni Suyantri
Jurnal Biologi Tropis Vol. 26 No. 4 (2026): in Progress
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.v26i4.13592

Abstract

Pandanan Beach is a coastal area in West Lombok, Indonesia, where seagrass meadows provide habitat for various species of Echinodermata. However, information on the structure of Echinodermata communities in this area remains limited. This study aimed to analyze the community structure of Echinodermata in the seagrass meadow of Pandanan Beach, Sekotong District, West Lombok, based on species composition, density, species diversity, evenness, and dominance. Data were collected using a combination of line transects and 2 × 5 m quadrats. A total of 16 species comprising four classes Asteroidea, Echinoidea, Ophiuroidea, and Holothuroidea were recorded within the quadrats, with 803 individuals documented. The average density was 3 individuals/m². The highest relative abundances were recorded for Macrophiothrix sp. (33.00%) and Tripneustes gratilla (32.00%). The Shannon–Wiener diversity index (H′ = 1.82) indicated moderate diversity, while the evenness index (E = 0.66) suggested a moderately even distribution of individuals among species. The dominance index (D = 0.23) indicated that no single species strongly dominated the community. Two additional species, Ophiomastix elegans and Diadema savignyi, were observed outside the quadrats and were therefore excluded from the quantitative community analysis. These findings provide baseline information on Echinodermata community structure in the Pandanan Beach seagrass meadow and may support future monitoring and ecosystem management initiatives.
Community Structure of Gastropods in the Seagrass beds of Pandanan Beach, Sekotong, West Lombok Muhammad Sulthon Hiroji; Didik Santoso; I Wayan Merta
Jurnal Biologi Tropis Vol. 26 No. 4 (2026): in Progress
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.v26i4.13849

Abstract

Seagras beds are coastal ecosystems that provide habitats, shelter, and food resources for various marine organisms, including gastropods, which play important roles in food webs and organic matter recycling. This study aimed to analyze the community structure of gastropods in the seagrass ecosystem of Pandanan Beach, Sekotong District, West Lombok. The research employed a descriptive-exploratory method, with sampling conducted using 2m x 5m quadrat transects. The data were analyzed based on species composition, the Shannon-wiener diversity index, the evenness index, and the dominance index. The result showed that the gastropods community consisted of 1.213 individuals belonging to 44 species and 21 famlies. Nassarius Reticulatus had the highest species composition percentage at 24.07%, followed bt Columbella Rustica at 21.60%. The Shannon-Wiener diversity index (H’) was 2.60, indicating moderate diversity. The evenness index (E) was 0.49, also classified as moderate, indicating that individual distribution among species was not entirely uniform. Meanwhile, the dominance index (D) was 0.13, indicating that no single species dominated the overall gastropods community. Overal, the gastropods community in the seagrass beds of Pandanan Beach exhibited moderate diversity and evenness, with low species dominance.
Co-Authors A Wahab Jufri Abdul Syukur Abdul Syukur Abdul Syukur Abdul Syukur Abdul Syukur Abdul Syukur Abdul Syukur Abdul Syukur Agil Al Idrus Agil Al Idrus Agil Al Idrus Agil Al Idrus Agil Al Idrus Agil Al Idrus Agil Al Idrus Agil Al Idrus Ahmad Raksun Ahmad Raksun Ahmad Raksun Ainun Diniyatushoaliha Arinal Hidayati Aulia Maulidina Baiq Sri Komalasari Bukhari Abdillah Dadi Setiadi Dea Yolanda Aulia Rida Dita Anggraini Safitri Sipayung Eni Suyantri Fitriyani Fitriyani G. Gunawan Gde Cahyadi Wirajagat Gito Hadiprayitno Hadiatullah Haryani Haryani Husain, Pahmi I Gde Mertha I Gusti Ngurah Aryawan Asasandi I Wayan Merta I Wayan Mertha Imam Bachtiar Inda Wahyuni Karima Paspania Karnan Karnan Karnan Khairuddin Kumala Ratna Dewi Laela Innaza Laela Salsa A Lalu Japa Lalu Japa Lalu Japa Lalu Japa Lalu Japa Lalu Muh. Sofyan Hadinata Lalu Raftha Patech Lalu Zulkifli Lalu Zulkifli Lalu Zulkifli M. Liwa Ilhamdi M. Liwa Ilhamdi M. Liwa Ilhamdi M. Rayfan Fadillah M. Yamin Mahrus Mahrus Mahrus Maulida Suryatni Maulidatin Nanisfi Moh. Liwa Ilhamdi Mohammad Liwa Ilhamdi Mohammad Liwa Ilhamdi Mohammad Liwa Ilhamdi Mohammad Liwa Ilhamdi Muh. Makhrus Muhammad Liwa Ilhamdi Muhammad Sulthon Hiroji Muhammad Yamin Muhlis Muhlis Ni Luh Putu Pebri Artayani . Nindi Hamida Lutfiani Novia Indra Anggraini Nurlaili Hidayati Pahrurrozi Rahmat Hidayatullah Ratna Sari Utami Rita Alawiyah Rizka Yulia Ashari Rully Bimantoro Siti Diniah Siti Nurhaliza Siti Nurul Inayah Sri Aprilia Nur Larasati Sri Prapti Astuti Susanty Ariani Syarif Husni Tita Syahri Ramadhani Vivi Maulida Cahyani Wayan Pasek Eka Sedana Putra Widia Apriani X Zardht Alex Hidayat Zulhalifah Zulhalifah