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All Journal Bumi Lestari ILMU KELAUTAN: Indonesian Journal of Marine Sciences Ulil Albab
Atmaja, Putu Satya Pratama
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Religion Agriculture, Biological Sciences & Forestry Humanities Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Social Sciences

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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.
Korelasi Kelimpahan Megabentos dengan Persentase Tutupan Terumbu Karang di Perairan Amed, Kabupaten Karangasem, Bali Nurdyputra, I Gusti Ngurah Galih Ksatria Mahadhika; Putra, I Nyoman Giri; Atmaja, Putu Satya Pratama
Bumi Lestari Journal of Environment Vol 24 No 1 (2024)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2024.v24.i01.p08

Abstract

The existence of each megabenthos is related to the condition of coral reefs which act as habitats for various types of megabenthos species. Benthos are commonly takes advantage of the ecosytem of coral reef as a habitat to live and shelter in the coral niches from natural predators. This study aimed to determined the abundance of megabenthos and the percentage of coral reef cover, as well as the correlation between the abundance of megabenthos and the percentage of live coral cover in Amed Waters. Megabenthos data collection was carried out using the Benthos Belt Transect (BBT) method. Point Intercept Transect (PIT) was used to examined the coral percentage cover. Correlation of Pearson was used to analyzed the correlation between abundance of megabenthos and coral percentage cover. A total of 473 individuals with a total abundance of 0.26 ind/m2 were found in this study. Interestingly, there were no Acanthaster planci individuals found during the data collection. The condition of coral reefs was dominated by Dead Coral Algae (DCA), while the percentage value of live coral cover in Amed Waters were 19% to 35% in the damaged to moderate category, respectively. Pearson correlation showed a value of (r) 0.067 with a very weak positive category which indicates that there is a positive relationship between the two variables which indicating that the correlation of megabenthos abundance has no significant relationship with the percentage of live coral cover. Keywords: megabenthos; Amed; Pearson; dead coral algae
Seagrass Meadows as Critical Ecosystems: An Integrated Approach to Conservation Area in Saleh Bay, West Nusa Tenggara Lestariningsih, Wiwid Andriyani; Himawan, Mahardika Rizqi; Rahman, Ibadur; Atmaja, Putu Satya Pratama; Khaldun, Muhammad Hafidz Ibnu; Santika, Lora; Murtiyoso, Mahbub; Gigentika, Soraya; Hernawati, Hernawati; Himawan, Cahya; Wibisono, Rendy Vidya
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 30, No 1 (2025): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.30.1.7-19

Abstract

Seagrass beds are crucial for marine ecosystems, providing habitats and food sources for diverse species while naturally protecting coastlines from erosion. These ecosystems play a pivotal role in stabilizing sediments, filtering pollutants, and acting as carbon sinks, which helps mitigate the effects of climate change. Their significance extends to supporting ecotourism and providing essential services to coastal communities, thereby promoting environmental conservation awareness. Saleh Bay, designated as a marine nature reserve, exhibits rich marine biodiversity across its five distinct zones: core, utilization, sustainable fisheries, non-conservation, and other zones. This study aimed a comprehensive understanding of the pivotal role played by seagrass beds in Saleh Bay's integrated ecosystem in West Nusa Tenggara. The density and percentage cover were count from three linear transects and placed perpendicularly to the coastline. Correspondence Analysis (CA) was applied to represents which species most strongly associated with specific zones. Meanwhile, Cluster Analysis was used to grouping specific zones based on the ecological characteristics. A total of eight seagrass species were identified, which dominated by Enhalus acoroides (42.15%) and closely related to Sustainable Fisheries and Utilization zones. Furthermore, the Cluster Analysis indicates that the Utilization and Sustainable Fisheries zones exhibit the highest degree of similarity (90%) based on their density characteristics. This research underscores the broader understanding of seagrass ecosystems. The high similarity between the Utilization and Sustainable Fisheries zones suggests that these areas play complementary roles in supporting the health of seagrass ecosystems. Management plans should integrate these findings to optimize resource use while ensuring ecological sustainability.
Asosiasi Gastropoda dengan Padang Lamun di Pantai Geger, Nusa Dua, Bali Sidik, Awalul Rizal Rohman; Indrawan, Gede Surya; Atmaja, Putu Satya Pratama
ULIL ALBAB : Jurnal Ilmiah Multidisiplin Vol. 3 No. 3: Februari 2024
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jim.v3i3.2916

Abstract

The Nusa Dua coast is an area that has a diverse ecosystem, ranging from coral reefs, mangrove forests and seagrass beds. Seagrass beds themselves play an important role in marine ecosystems and are used as shelter, foraging areas and spawning grounds for animals that live in seagrass habitats, one of which is gastropods. Gastropods have an important role in aquatic ecosystems, namely helping in the process of mechanical decomposition of organic material through their feeding activity, which will then be used by seagrass plants to carry out photosynthesis to support the growth of seagrass. The aim of this research is to analyze the community structure of Gastropods and to analyze the association between Gastropods and seagrass in the waters of Geger Beach, Nusa Dua, Bali. Samples were taken from 3 stations, station 1 was in a location next to a rocky road, station 2 was in a location where there were many fishing boats, and station 3 was in a location where there were no fishing boats. In the waters of Geger Beach, 5 types of seagrass species were found consisting of Thalassia hemprichii, Enhalus acoroides, Cymodocea rotundata, Halophilla ovalis, and Syringodium isoetifolium. At Geger Beach, 25 families, 76 species and 276 individuals were obtained of gastropods, with a diversity (H') value of 2.10, uniformity (E) of 0.59, and dominance (D) of 0.19. These results indicate that the Gastropod structure at Geger Beach is in a stable condition. The association between Gastropods and seagrass beds is dominated by associations with a very low category, which has an association value of <0.22 for 295 species. This is thought to be due to the low number of species appearing and the existence of competition between the two species at the observation location.
Korelasi Kelimpahan Ikan Herbivora Dengan Tutupan Karang di Pantai Lipah, Karangasem, Bali Afip, Fahmi Anis; Dharma, I Gusti Bagus Sila; Atmaja, Putu Satya Pratama
ULIL ALBAB : Jurnal Ilmiah Multidisiplin Vol. 3 No. 4: Maret 2024
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jim.v3i4.3265

Abstract

Penelitian ini bertujuan untuk mengetahui nilai korelasi ikan herbivora dan tutupan terumbu karang di pantai Lipah, Desa Bunutan, Karangasem, Bali. Menggunakan metode Underwater Visual Census (UVC) untuk mengidentifikasi dan menghitung kelimpahan ikan herbivora dari empat keluarga ikan herbivora: Acanthuridae, Scaridae, Siganidae, dan Ephippidae. Selain itu, metode Underwater Photo Transect (UPT) digunakan untuk mengukur tutupan terumbu karang di lima titik pengamatan. Hasil penelitian menunjukkan keberadaan 12 spesies ikan herbivora dari 4 famili yang berbeda. Famili Acanthuridae memiliki rata-rata kelimpahan tertinggi, mencapai 79 ind/ha. Tutupan terumbu karang, meskipun bervariasi, secara umum tergolong dalam kriteria "cukup baik" hingga "kurang baik". Analisis data menunjukkan adanya korelasi yang kuat (rxy = 0.79) antara kelimpahan ikan herbivora. Hal ini mengindikasikan hubungan yang erat antara kelimpahan ikan herbivora dan terumbu karang. Ketika tutupan terumbu karang mengalami peningkatan, kelimpahan ikan herbivora juga cenderung meningkat. Sebaliknya, ketika tutupan terumbu karang mengalami penurunan, kelimpahan ikan herbivora cenderung mengalami penurunan serupa. Terdapat korelasi positif antara kelimpahan ikan herbivora dan tutupan terumbu karang, yang berarti ketika terumbu karang meningkat, kelimpahan ikan herbivora juga cenderung meningkat, dan sebaliknya.
Co-Authors Afip, Fahmi Anis Gede Surya Indrawan Gigentika, Soraya Hernawati Hernawati Himawan, Cahya I Gusti Bagus Sila Dharma Khaldun, Muhammad Hafidz Ibnu Laharjana, I Ketut Aditya Krisna Lestariningsih, Wiwid Andriyani Mahardika Rizqi Himawan Murtiyoso, Mahbub Nurdyputra, I Gusti Ngurah Galih Ksatria Mahadhika Putra, I Nyoman Giri Rahman, Ibadur Santika, Lora Sidik, Awalul Rizal Rohman Suardana, A. A. Md. Ananda Putra Van Keulen, Mike WIBISONO, RENDY VIDYA