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Indeks Ekologi Gastropoda di Kawasan Perairan Kecamatan Tilamuta Kabupaten Boalemo Faradila Putri Nasaru; Miftahul Khair Kadim; Sitty Ainsyah Habibie; Sandrianto Djunaidi
The NIKe Journal VOLUME 13 ISSUE 3 | SEPTEMBER 2025
Publisher : Fakultas Kelautan dan Teknologi Perikanan - Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/nj.v13i3.32466

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This study aimed to determine gastropod diversity and the current ecological conditions of the waters in Tilamuta District, Boalemo Regency. Sampling was conducted in April 2025, distributed across three stations. Samples were collected during low tide using a belt transect method covering an area of 150 m2. Identification results revealed a total of 2204 gastropod individuals, representing 12 families: Columbellidae, Cerithiidae, Conidae, Cypraeidae, Strombidae, Littorinidae, Turbinidae, Trochidae, Muricidae, Neritidae, Patellidae, and Vasidae, with a total of 21 species identified. The Shannon Diversity Index (H') indicated a low level of diversity (H' < 2) in the study area. Conversely, the dominance index for the study site ranged from 0.75 to 1.00, signifying a high level of dominance. Furthermore, evenness patterns, as indicated by the J' and Ep indices, all showed values below 1, suggesting an uneven distribution of gastropod species. The study results reveal that the aquatic environment of Tilamuta District, Boalemo Regency, shows signs of pollution, stemming from impaired environmental conditions in the waters, evidenced by low biodiversity.
Indeks Kemerataan dan Dominansi Gastropoda di Perairan Pesisir Pantai Moodulio Kabupaten Bone Bolango Provinsi Gorontalo Windi Deptianingsih Asama; Miftahul Khair Kadim; Sitti Nursinar; Sandrianto Djunaidi
The NIKe Journal VOLUME 13 ISSUE 3 | SEPTEMBER 2025
Publisher : Fakultas Kelautan dan Teknologi Perikanan - Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/nj.v13i3.32535

Abstract

Indonesia's marine biological diversity is exceptionally rich, encompassing all existing phyla. Among them, the class Gastropoda represents the largest group within the Phylum Mollusca. Organisms inhabiting hard substrates in intertidal zones exhibit remarkable adaptability to dynamic conditions. Gastropods, in particular, demonstrate a high capacity for adaptation, enabling their survival across various habitats. The level of gastropod species diversity in a given aquatic environment is influenced by several factors, including physical environmental conditions. This study investigates the impact of environmental parameters on the evenness and dominance of gastropods, as well as the effects of environmental changes on these community characteristics. Sampling was conducted at three stations along the coastal area of Bone Bolango Regency. An observational procedure employing a census method was used for sample collection, and purposive sampling determined the sampling points based on specific criteria. Gastropod specimens were collected using a hand-picking technique within a 150 m² transect area, observing the entire station's hard substrate. Water quality data were subsequently analyzed using a pollution index. A total of 422 gastropod individuals were recorded across all stations, representing eight families: Conidae, Cypraeidae, Muricidae, Turbinidae, Neritidae, Strombidae, Tegulidae, and Turbinellidae. Nineteen species were identified from the three research locations. The diversity indices calculated for the three locations are as follows: The Shannon-Wiener diversity index (H′) showed values less than four, indicating moderate diversity. The Simpson's dominance index (D) had values close to one, suggesting a high level of dominance. The Pielou's evenness index (J′) approached one, indicating high evenness within the gastropod community.
Comparison of true mangrove stands in Dudepo and Ponelo Islands, North Gorontalo District, Indonesia FAIZAL KASIM; MIFTAHUL KHAIR KADIM; SITTI NURSINAR; ZULKIFLI KARIM; ALDIN LAMALANGO
Biodiversitas Journal of Biological Diversity Vol. 20 No. 1 (2019)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d200142

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Abstract. Kasim F, Kadim MK, Nursinar S, Karim Z, Lamalango A. 2019. Comparison of true mangrove stands in Dudepo and Ponelo Islands, North Gorontalo District, Indonesia. Biodiversitas 20: 359-366. This study aimed to investigate and compare the current status of mangrove areas, as well as the composition and species diversity of mangrove stands in both regions of Dudepo and Ponelo Islands. The results showed that the mangrove areas calculated using the segmentation method in classifying image of Landsat-8 OLI (acquisition on September 2017) were 279.46 ha (Dudepo Island) and 113.35 ha (Ponelo Island) respectively. A total of 13 species of true mangrove were recorded from both islands, using survey method from 9 transect lines (TL), with a distance ranging from 40 to 210 meters (1-6 quadrats) per transect. The mean densities of trees were 2133 ± 329.78 ha-1 (Dudepo Island) and 2111 ± 234.28 ha-1 (Ponelo Island), while those of saplings and seedlings were 58 ± 13.48 ha-1 and 1425 ± 113.96 ha-1 (Dudepo Island), and 79 ± 14.51 ha-1 and 2963 ± 443.22 ha-1 (Ponelo Island). The mean diameter and basal area were 19.73 ± 10.65 cm and 84.22 ± 67.67 m2ha-1 (Dudepo Island), 17.04 ± 1.46 cm and 60.07 ± 15.12 m2ha-1 (Ponelo Island), respectively. The Importance Value Index (IVI) ranged between 3.97-114.87 (Dudepo Island) and 6.04-82.18 (Ponelo Island). The dominant and codominant species based on IVI in both islands were Rhizophora apiculata Blume and R. stylosa Griff. The indexes of diversity, richness, and evenness of mangrove species in both islands were 0.34-1.70, 0.48-1.18, 0.47-0.94 (trees), 0.00-1.10, 0.00-1.82, 0.00-1.00 (saplings), and 0.00.-1.48, 0.00-1.44, 0.72-1.00 (seedlings), respectively. The Bray-Curtis similarity index between Dudepo and Ponelo Islands, based on the overall values of community attributes, was 0.75.
Epiphytic microalgae community as aquatic bioindicator in Brantas River, East Java, Indonesia Sulastri Arsad; Khabib Taufiq Putra; Nurul Latifah; Miftahul Khair Kadim; Muhammad Musa
Biodiversitas Journal of Biological Diversity Vol. 22 No. 7 (2021)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d220749

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Abstract. Arsad S, Putra KT, Latifah N, Kadim MK, Musa M. 2021. Epiphytic microalgae community as aquatic bioindicator in Brantas River, East Java, Indonesia. Biodiversitas 22: 2961-2971. One way to monitor water quality is by using biological indicators, namely epiphytic microalgae (periphyton). This study aims to analyze the epiphytic periphyton community structure and analyze the river health status using a saprobic index. The research location was in the Brantas River, Blitar District, East Java, Indonesia. The method used was a survey with sampling at three sites based on the purposive sampling technique. Periphyton samples were taken using the quadrant transect (5x5 cm²) method and then identified using the Lackey Drop Micro transect Counting Method. The results show that the periphyton community structure is in balance, and there are six divisions of 59 different genera. The six divisions found are Bacillariophyta, Cyanophyta, Chlorophyta, Charophyta, Ochrophyta, and Rhodophyta. The most identified genus is from the Bacillariophyta Division with 28 genera, while the least identified genus is the Rhodophyta division with 1 genus. The abundance ??ranges from 242,800-1,229,174 cells. cm-2, the relative abundance index ??of periphyton ranges from 3-60% (site 1), 9-57% (site 2), 1-62% (site 3), the diversity index ranges from 1.212-2.617 (moderate), the uniformity index ranges from 0.307-2.151 (high), the dominance index ranges from 0.105-0.549 (moderate), and the saprobic index ranges from-0.18 to 0.55. Moreover, supporting water quality parameters are still optimal, except for ammonia and total organic matter parameters that exceed the quality standard. Based on the saprobic value obtained, the water quality of the Brantas River in Tawangrejo Village can be classified into the category of ?/?-mesosaprobic to ?-mesosaprobic saprobic levels with mild to moderate levels of pollution.
Biodiversity and community assemblages of freshwater and marine macrozoobenthos in Gorontalo Waters, Indonesia Miftahul Khair Kadim; Nuralim Pas; Elan R Alinti; Citra Panigoro
Biodiversitas Journal of Biological Diversity Vol. 23 No. 2 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230204

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Abstract. Kadim MK, Pasisingi N, Alinti ER, Alinti ER, Panigoro C. 2022. Biodiversity and community assemblages of freshwater and marine macrozoobenthos in Gorontalo Waters, Indonesia. Biodiversitas 23: 637-647. Macrozoobenthos plays an essential role in the aquatic ecosystem including as primary consumers, food sources, and water quality bioindicators. This study aimed to determine the composition, taxa abundance, community structure of the macrozoobenthos in the lower reach, estuary, and marine areas along Gorontalo waters, also their association with water quality parameters. Biota samples were collected purposively from 33 sampling points. The sampling process was conducted in June 2020 and May 2021. Macrozoobenthos samples were taken using Ekman Grab and prepared with filters (mesh size of 500 µm). Statistically, a t-test was done to assess the significance of taxa abundance difference among three different ecosystems from both sampling periods. Similarity percentages were displayed through a dendrogram. Furthermore, the biota assemblages and water quality parameters association were interpreted through Eigenvalues of Principal Component Analysis using Minitab ver. 14.0. The results showed that the macrozoobenthic community structure composed 70 taxa belonging to six classes dominated by Gastropoda, followed by Bivalvia, Malacostraca, Clitellata, Polychaeta, and Polyplacophora. The marine area had the highest abundance of macrozoobenthos (469.5 ind. m-3 in 2020; 460.9 ind. m-3 in 2021), followed by the river station (335.3 ind. m-3 in 2020; 2621 ind. m-3 in 2021), and estuary zone (217.3 ind in 2020. m-3; 848.5 ind. m-3 in 2021). The most abundant species in the lower reach area was Melanoides sp. (135.5 ind. m-3 in 2020; and 1222.5 ind. m-3 in 2021), while in the estuary was Brachidontes sp. (70.7 ind. m-3 in 2020; and 248 ind. m-3 in 2021). Batillaria sp. (128.3 ind. m-3 in 2020) and Anachis sp. (1510.7 ind. m-3 in 2021) were the species with the highest number in the marine zone. Based on the diversity and evenness index, the sea was in the medium category with no dominant species in the marine area. Biota communities in the lower reach station tend to be more like estuary biota than marine biota.
Metallothionein level in the larva of Cheumatopsyche sp. and the relationship between heavy metal concentration in Bone River, Gorontalo, Indonesia Miftahul Khair Kadim; Endang Yuli Herawati; Diana Arfiati; ‪Asus Maizar Suryanto Hertika
Biodiversitas Journal of Biological Diversity Vol. 23 No. 11 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d231148

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Abstract. Kadim MK, Herawati FY, Arfiati D, Hertik AMS. 2022. Metallothionein level in the larva of Cheumatopsyche sp. and the relationship between heavy metal concentration in Bone River, Gorontalo, Indonesia. Biodiversitas 23: 5942-5950. This study aims to confirm that the larvae of Cheumatopsyche sp. contain a metal-binding protein, metallothionein, in their body and correlate it with heavy metal concentrations in the larval tissues and sediments in Bone River. Pb, Cd and Hg concentrations in sediment, tissue and Metallothionein (MT) levels were analyzed in several areas with different metal contamination. The Pb concentration in the sediment averaged 33.6 ppm; Hg 0.17 ppm; Cd 0.125 ppm. Total metals concentration in the whole body of Cheumatopsyche sp. ranged from 0.424 to 0.781, while the MT content ranged from 4637 to 6930 ng.g-1. The results revealed that the larvae could accumulate different metals and be more effective in accumulating Hg than Pb and Cd, regardless of the level of metal concentration in the sediment. Metal concentrations measured in Cheumatopsyche sp. showed a significant correlation with metals in the sediment. Metallothionein levels throughout the larval body showed differences in different areas of metal contamination and this correlated with the concentrations of Pb, Cd, and Hg measured in the larval tissue, thus reflecting their bioavailability in the environment. The results also showed that even under exposure to low metal concentrations, MT was still detectable in Cheumatopsyche sp. and proved to be a good predictor of metal accumulation.
Morphological characteristic and truss morphometric analysis of amphidromous goby (‘nike') (Teleostei: Gobiiformes) in Bone River, Gorontalo, Indonesia NURALIM PASISINGI; DWY SUCI; CITRA PANIGORO; MIFTAHUL KHAIR KADIM
Biodiversitas Journal of Biological Diversity Vol. 25 No. 1 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d250125

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Abstract. Pasisingi N, Suci D, Panigoro C, Kadim MK. 2024. Morphological characteristic and truss morphometric analysis of amphidromous goby (‘nike') (Teleostei: Gobiiformes) in Bone River, Gorontalo, Indonesia. Biodiversitas 25: 223-231. One of the preferred fish resources in the Gorontalo region is amphidromous goby species, commonly known by local community as nike fish. In rivers, at the adult stage, these fish are morphologically and potentially morphometrically not necessarily distinguishable among species and between sexes. This research aimed to identify the morphological and morphometric truss characters that distinguish the sexual characteristics of goby fishes in the Bone River, Gorontalo. Fish samples were purposefully collected from eight sites along the river, spanning from upstream to downstream, using a backpack electrofishing device. Sampling occurred in March and November 2022, with morphological analysis and measurements conducted on 336 individuals. The morphometric method measured data from 13 points on the sample body, forming 28 combinations of truss distance characters (A1-A3; B1-B12; C1-C10; D1-D3) connecting these points. Morphologically, the samples were identified as three species, namely Sicyopterus longifilis, Belobranchus belobranchus, and Awaous grammepomus. This study revealed distinctions in morphological characters between male and female individuals. In S. longifilis, males exhibited a relatively slimmer body shape compared to the rounded form of females. Male B. belobranchus displayed more striking coloration than females, while male A. grammepomus featured a lighter brown body color than the paler females. All the morphometric truss characters in this study can be reliably used as a sexual distinguishing characteristic in S. longifilis. As for species B. belobranchus, B7 truss cannot be considered a differentiator. In A. grammepomus, thirteen truss characters (B3, B4, B6, B7, B8, B10, B12, C3, C6, C7, C9, C10, D1) cannot be used to differentiate males and females.
Benthic macroinvertebrate variability as an indicator of aquatic health in the Bone River, Gorontalo, Indonesia MIFTAHUL KHAIR KADIM; NURALIM PASISINGI; ABDUL HAFIDZ OLII; ASUS MAIZAR SURYANTO HERTIKA; DIANA ARFIATI; ENDANG HERAWATI YULI; DEWI WAHYUNI K. BADERAN; SUCIYONO SUCIYONO
Biodiversitas Journal of Biological Diversity Vol. 26 No. 3 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260324

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Abstract. Kadim MK, Pasisingi N, Olii AH, Hertika AMS, Arfiati D, Yuli EH, Baderan DW, Suciyono. 2025. Benthic macroinvertebrate variability as an indicator of aquatic health in the Bone River, Gorontalo, Indonesia. Biodiversitas 26: 1247-1256. The Bone River in Gorontalo, Indonesia is at risk of pollution due to anthropogenic activities in the surrounding area. Macroinvertebrates serve as bioindicators of pollution based on their community characteristics, including sedentary behavior, limited mobility, and sensitivity to water quality. This study aims to assess macroinvertebrate communities and evaluate the water quality of the Bone River watershed using the Biological Monitoring Working Party-Average Score Per Taxon (BMWP-ASPT) biotic index. Macroinvertebrate community variability was examined across 12 observation stations. Sampling was conducted during periods of low river discharge and in the absence of precipitation. Observation stations were purposefully selected based on prevailing ecological conditions (preferably riffle areas) and potential contamination sources from land use activities. Macroinvertebrate samples were collected between April and August during the 2021-2023 period and were identified at the family level. A total of 7,456 individuals, representing 43 genera, were recorded, with Platybaetis, Cheumatopsyche, Chironomus, and Coxelmis being widely distributed along the river. Moderate diversity, a high evenness index, and the dominance index suggest that no single macroinvertebrate species dominates the community. The BMWP-ASPT values ranged from 3.08 to 6.77, indicating varying levels of pollution in the Bone River. The findings demonstrate a progressive decline in river health, with worsening conditions observed downstream over the study period.
Intertidal gastropod diversity in hard-bottom habitats as an indicator of habitat quality along Tomini Bay Coastline, Gorontalo, Indonesia MIFTAHUL KHAIR KADIM; NURALIM PASISINGI; FAIZAL KASIM; SANDRIANTO DJUNAIDI; SUCIYONO SUCIYONO; YENNY RISJANI; MUHAMAD ROEM
Biodiversitas Journal of Biological Diversity Vol. 27 No. 2 (2026)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d270207

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Abstract. Kadim MK, Pasisingi N, Kasim F, Djunaidi S, Suciyono, Risjani Y, Roem M. 2026. Intertidal gastropod diversity in hard-bottom habitats as an indicator of habitat quality along Tomini Bay Coastline, Gorontalo, Indonesia. Biodiversitas 27 (2): d270207. https://doi.org/10.13057/biodiv/d270207. Gastropods are reliable bioindicators for evaluating environmental quality. Therefore, understanding their species diversity, especially in hard-bottom habitats is essential for ecological assessment and coastal management. This study aimed to explore the spatial diversity of gastropods inhabiting hard-bottom substrates along the Tomini Bay Coastline in Gorontalo, Indonesia and assess their potential as indicators of coastal water quality. Surveys were conducted at five main stations comprising 21 sub-stations and community structure was analyzed using diversity indices and biotic metrics. A total of 195 species representing 33 families were recorded, with Muricidae, Conidae, and Neritidae as dominant families. Planaxis sulcatus together with Nerita senegalensis and Littoraria scabra contributed substantially to overall abundance. Gastropod diversity exhibited marked spatial variation in community structure among stations. This variation was primarily influenced by turbidity, dissolved oxygen and orthophosphate concentration, which were identified as the key drivers differentiating environmental conditions across sites. Habitat quality assessment indicated slightly polluted conditions but overall maintained good ecological status. These findings demonstrate the sensitivity of intertidal gastropod assemblages to environmental gradients and reinforce their value as effective bioindicators for long-term biodiversity monitoring and coastal ecosystems management in tropical hard-bottom environments.
Spatial Variation and Community Structure of Trichoptera Larvae as a Basis for Biomonitoring in the Bone River, Gorontalo Miftahul Khair Kadim; Nuralim Pasisingi; Abdul Hafidz Olii
Biosel Biology Science and Education Vol. 15 No. 2 (2026): BIOSEL (Biology Science and Education: Jurnal Penelitian Sains dan Pendidikan)
Publisher : INSTITUT AGAMA ISLAM NEGERI AMBON

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33477/bs.v15i2.13838

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This study aimed to examine the community structure of Trichoptera larvae in the Bone River, Gorontalo (Indonesia), by evaluating family-level composition, dominance patterns, and spatial variation across five sampling stations (St.1-St.5). Trichoptera larvae were collected using standardized sampling methods, identified to the family level, and analyzed using multiple diversity metrics, including the Shannon, Simpson, Evenness, and Margalef indices. Differences in taxon richness among stations were assessed using rarefaction analysis, while community structure patterns were further explored using multivariate approaches based on Bray–Curtis dissimilarity, non-metric multidimensional scaling (NMDS), and hierarchical cluster analysis. A total of 754 individuals representing eight families were identified. Hydropsychidae strongly dominated the community, accounting for more than 70% of the total individuals. Diversity indices revealed spatial variation in community balance, with Station 5 exhibiting the highest diversity and evenness values, indicating a relatively more balanced community structure. Rarefaction analysis suggested that differences in richness were not solely driven by sampling effort. Multivariate analyses based on Bray-Curtis dissimilarity, hierarchical clustering, and NMDS demonstrated spatial differentiation in community composition along the river gradient, largely associated with variations in family dominance. Water quality parameters (temperature, pH, and dissolved oxygen) were within national quality standards, indicating conditions generally supportive of aquatic life. The observed variation in community structure therefore likely reflects local habitat dynamics rather than broad physicochemical stress. This study provides baseline data on Trichoptera communities in the Bone River and highlights the ecological importance of Hydropsychidae in shaping community structure, supporting the potential application of Trichoptera as biomonitoring indicators in riverine ecosystems.  Keywords: Trichoptera, River, Community Structure, Spatial Variation, Biomonitoring
Co-Authors .Ahaya, Wirnawati Abdul Hafidz Olii Abdul Kadir Jailani Ade Irma Polamolo Afriani R. Paramata ALDIN LAMALANGO Antonio Sinulingga, Luis Arafik Lamadi Arbi, Indah Rianti Arfiani Rizki Paramata Asama, Windi Deptianingsih ASUS MAIZAR SURYANTO HERTIKA Asus Maizar Suryanto H Ayinda Kristi Tiopo Bramantio Setiawan Cempaka, Sri Citra Panigoro Damopolii, Yenita Daulima, Novia Dewi J. Hasiru DEWI WAHYUNI K. BADERAN DIANA ARFIATI DIANA ARFIATI Diana Arfiati DWY SUCI Elan R Alinti Endang H Yuli Endang H Yuli, Endang H ENDANG HERAWATI YULI Endang Yuli Herawati Endang Yuli Herawati Faizal Kasim Faradila Putri Nasaru Febiyanti Padja Femy M. Sahami Ferdi Kurniawan Mohamad Fione Yukita Yalindua Frismarwati Wahyuni Lawadjo Hardiyanti Yusuf Hilalunga, Adelin Hindunstira Baruadi Ibrahim Miolo, Mikhael Jefri D Ladja Khabib Taufiq Putra Khairinissa Septiani Makmur Maharani, Siti Adel Makmur, Khairinissa Septiany Mansyur Abukasim Mbuinga, Adeliya Miranti Khairunisa Abudi Mohamad Aldi Alex Ikano Mohammad Eki Julkifli Samu MUHAMAD ROEM Muhammad Musa Mursalim, Paramita Nasaru, Faradila Putri Novia Daulima Nur Fadhilah Ahmad Nuralim Pas Nuralim Pasisingi Nurul Latifah Polamolo, Ade Irma Putri Sapira Ibrahim Rauf, Yuliana Sahami, Femi M. Sandrianto Djunaidi sandriyanto djunaidi Segita Kono Sitti Nursinar Sitty Ainsyah Habibie Sri Sudaryanti, Sri SUCIYONO SUCIYONO Sulastri Arsad Wila Rumina Nento Windi Deptianingsih Asama Wiwik Handayani Wonopati, Cindy Trisnawaty YENNY RISJANI ZULKIFLI KARIM ‪Asus Maizar Suryanto Hertika