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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan
Van Keulen, Mike
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Earth & Planetary Sciences Education Engineering

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Comparisons of benthic associated fauna assemblages in seagrass meadows across conservation and non-conservation areas in Bali and Lombok, Indonesia Atmaja, Putu Satya Pratama; Laharjana, I Ketut Aditya Krisna; Suardana, A. A. Md. Ananda Putra; Van Keulen, Mike
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 1 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.1.71-84

Abstract

Benthic ecosystem has been widely considered as an important feature of seagrass associated fauna, and its function as a grazer and linkage between primary producers and higher trophic level is well known. Though the importance of benthic fauna in seagrass ecosystems has been indicated in many studies, its biodiversity in spatial scale has often been poorly studied. This study aimed at examining the assemblages and diversity of benthic associated fauna in conservation areas (CA) and non-conservation areas (NCA) across the seagrass meadows in Bali and Lombok. This study found that the assemblages and diversity of benthic fauna greatly varied between the meadows. A total of 430 individuals associated to benthic fauna from 24 species were identified in Bali and Lombok. Of these, Gastropods were the highest class of taxa recorded in this study, followed by Bivalvia, Echinodermata, Decapoda, and Amphipoda. Permutation multivariate analysis of variance (PERMANOVA) revealed a significantly different benthic fauna diversity between sites. Non-metric Multidimensional Scaling (nMDS) and Bray–Curtis analysis showed a clear distinction of benthic fauna assemblages between CA and NCA, both in Bali and Lombok. These results indicated that from spatial perspective, different characteristics of seagrass meadows may represent different biodiversity of associated fauna. These differences might be driven by different anthropogenic pressure and variation of substrates among the meadows which may affect the composition of the benthic fauna ecosystems. The implication of this study was to providing baseline data on guiding the appropriate approach and strategies for management and conservations of seagrass ecosystems.
Fish biodiversity and substrate composition on coral reef ecosystem at Penimbangan, Buleleng Regency, Bali Safitri, Diah Ayu; Andriyono, Sapto; Mukti, Akhmad Taufiq; van Keulen, Mike
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 14, No 2 (2025): JUNE 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.2.36210

Abstract

The Penimbangan is one of the potential locations for underwater tourism in the Regency of Buleleng, with a unique dive spot. Planning and sustainable coastal development are essential for the continuity of the ecosystem, the sea, and the economy. Fish and coral studies in Penimbangan, District Buleleng, occurred from December 2022 to February 2023. Location observation shared four sites of data retrieval. The determination sites study uses purposive sampling based on the spread of coral naturally. Data was collected by Underwater Photo Transect (UPT) for coral and Underwater Visual Census (UVC) for fish. Transect area coral 50m long with quadratic transect (58cm x 44cm), and classified categories using CPCe software. Transect area fish of 350 m2 (length 70 m, limit right and left 2.5 m), identified fish to species level. The most studied habitat associations in coral reefs are coral (HC) and fish in coral assemblages. Percentage composition substrate basis in Penimbangan, namely dead coral with algae (106.74), coral (90.27), and sand (70). Lifeform coral is found in as many as ten types; the most are CM (39.00), CE (23.20), and ACS (10.07). A total of 17 families with 70 reef fish species were recorded in this study. The family with the most species is Pomacentridae (25), followed by Chaetodontidae (9) and Labridae (8). The composition of fish will vary according to the type of habitat.Keywords:FishBiodiversitySubstrateCoral ReefEcosystemBali
Fish biodiversity and substrate composition on coral reef ecosystem at Penimbangan, Buleleng Regency, Bali Safitri, Diah Ayu; Andriyono, Sapto; Mukti, Akhmad Taufiq; van Keulen, Mike
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 14, No 2 (2025): JUNE 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.2.36210

Abstract

The Penimbangan is one of the potential locations for underwater tourism in the Regency of Buleleng, with a unique dive spot. Planning and sustainable coastal development are essential for the continuity of the ecosystem, the sea, and the economy. Fish and coral studies in Penimbangan, District Buleleng, occurred from December 2022 to February 2023. Location observation shared four sites of data retrieval. The determination sites study uses purposive sampling based on the spread of coral naturally. Data was collected by Underwater Photo Transect (UPT) for coral and Underwater Visual Census (UVC) for fish. Transect area coral 50m long with quadratic transect (58cm x 44cm), and classified categories using CPCe software. Transect area fish of 350 m2 (length 70 m, limit right and left 2.5 m), identified fish to species level. The most studied habitat associations in coral reefs are coral (HC) and fish in coral assemblages. Percentage composition substrate basis in Penimbangan, namely dead coral with algae (106.74), coral (90.27), and sand (70). Lifeform coral is found in as many as ten types; the most are CM (39.00), CE (23.20), and ACS (10.07). A total of 17 families with 70 reef fish species were recorded in this study. The family with the most species is Pomacentridae (25), followed by Chaetodontidae (9) and Labridae (8). The composition of fish will vary according to the type of habitat.Keywords:FishBiodiversitySubstrateCoral ReefEcosystemBali
Co-Authors Akhmad Taufiq Mukti Atmaja, Putu Satya Pratama Laharjana, I Ketut Aditya Krisna Safitri, Diah Ayu Sapto Andriyono Suardana, A. A. Md. Ananda Putra