Cohesive Sediment Transport Modeling on Inner Ambon Bay

Noya, Yunita A.; Purba, Mulia; Koropitan, Alan F.; Prartono, Tri

doi:10.28930/jitkt.v8i2.15834

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…In Inner Ambon Bay, white-spotted rabbitfish Siganus canaliculatus correlates with available seagrass meadows (Latuconsina et al 2013;2020a). This fish matures at six months of age, has a high exploitation and mortality rate (Latuconsina et al 2020b), and gives a high grazing pressure on seagrasses (Irawan and Nganro 2016;Noya et al 2016). S. canaliculatus also affects seagrass vegetation, as it is necessary for its growth and reproductive biology (Madduppa et al 2019).…”

Section: Discussionmentioning

confidence: 99%

Effects of fish herbivory on seagrass meadows of Guang-guang, Mati City, Philippines

2023

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This study provides information on the effects of fish grazing on a seagrass bed that was dominated by Thalassia hemprichii in Guang-guang, Dahican, Mati City, Davao Oriental, Philippines. We tested the assumption that herbivore exclusion keeps the growth of seagrass shoots up to a minimum length. Fish visual census was used to count the abundance of fish in the area during high tide at a distance of 5 m away from the treatment cages with a 15 m transect length. Among all species, Siganus fuscescens was the most abundant (499) followed by S. guttatus (153), while Thalassoma jansenii was the less abundant (13). The result of the weekly fish count in the seagrass bed showed highly significant variations in the number and census of species present in the area (df = 11, MS = 2.88, F = 30.10, p < 0.001). Analysis of shoot length measurement in treatment cages also exhibited highly significant differences throughout the sampling period (df = 11, MS = 726.71, F = 1,633.10, p < 0.001). Comparison between initial and final shoot counts also showed significant differences, with a higher shoot count in the full cage (X2 = 8, df = 2, p = 0.018; FC > PC > OP). This study raises clear evidence to support the assumption that herbivore exclusion positively influences the growth of T. hemprichii in this area.

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Section: Discussionmentioning

confidence: 99%

Effects of fish herbivory on seagrass meadows of Guang-guang, Mati City, Philippines

2023

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“…Reef fish data were taken using the UVS (Underwater Visual Census) method due to their high consistency value [19]. The data taken in Pemuteran consisted of 2 station points and on Menjangan Island consisted of 2 station points by stretching the transect along 50 m parallel to the coastline with an imaginary line vision of 2.5 m to the right and left.…”

Section: Reef Fish Data Collection and Analysismentioning

confidence: 99%

Monitoring coral reef conditions in the Biorock Pemuteran rehabilitation area during the 2016 coral bleaching

Subhan,

Arafat,

Jundulloh

et al. 2024

BIO Web Conf.

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Pemuteran is well-known for its community-based coral reef conservation activities utilising Biorock technology, through the application of low voltage electricity. The main objective of this research is to assess the condition of coral reefs and fish communities within the Biorock area in Pemuteran, Bali. Data collection was implemented in June 2016 at the bleaching event, employing the Point Intercept Transect (PIT) method, and the Underwater Visual Census (UVCs) method. The benthic community composition at both research stations was dominated by dead coral with algae (Biorock Pemuteran 48.9%, Menjangan Island 51%). Both research locations exhibited branching coral and massive coral as the predominant coral lifeforms. Observational findings reveal noticeable differences in the community structure of coral fish between Biorock Pemuteran and Menjangan Island waters. A total of 11,260 individuals covering 120 fish species across 21 families. Higher fish abundance in Menjangan Island (1,326 ± 224 ind/250 m2) compared to Biorock Pemuteran (551 ± 235 ind/250 m2). The condition of coral reefs at both research locations is included in the poor category (0 – 24.9%). The reef fish community in both Biorock Pemuteran and Menjangan Island is in a stable condition with low dominance level and a moderate to high diversity.

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“…Semakin tingginya SSC pada tahun 2019, menandakan bahwa semakin tinggi pula SSC yang terbawa oleh aliran arus. Hal ini mungkin disebabkan oleh meningkatnya penggunaan lahan atas, yang pada akhirnya akan berakibat runoff dan berakhir pada perairan Teluk Ambon (Noya, 2007;Fadli, dkk., 2014;Noya, et al, 2016a).…”

Section: Model Transport Sedimenunclassified

Reclamation and sedimentation impacts around the Wairuhu River estuary, Poka-Galala threshold

Noya,

Manuputty

2023

AA: ASC

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Wairuhu River is disembogued on the sill of Poka-Galala, Ambon Bay. The estuary is affected by the coastal reclamation which led to the fester sedimentation. It triggers the problem of altering the shoreline and the dynamics of water movement, as well as the surrounding ecosystem. The modeling approach was applied to reconstruct the alterations around the estuary. The study aimed to estimate the changes on the shoreline, current patterns, and sediment transport patterns (suspended sediment), and to describe marine resources around the estuary of Wairuhu. MIKE 3 FM was utilized to reconstruct the pattern of flow and sediment transport changes, and coordinates plottings from satellite data were used to measure the coastline. The model was validated by using the data of tide and surface flow. The results showed the alteration pattern of the shoreline around the Wairuhu estuary occurred as a result of coastal reclamation. The flow validation (mooring and model) using RMSE was 0.38 which meant there was no difference between the model and mooring. By the model, the flow pattern that passed through the APG was following the tidal pattern. The changes in the tidal platform also occurred on the sediment transport pattern that formed the total distribution pattern of SSC (suspended sediment concentration). Several classes of macroflora and macrofauna were uncovered, such as Malacostraca, Echinoidea, Bivalvia, Asteroidea, Ophiuroidea, and Gastropoda.Keywords: Modeling; Poka-Galala sill; Sedimentation; Wairuhu River

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Cohesive Sediment Transport Modeling on Inner Ambon Bay

Cited by 4 publications

References 5 publications

Effects of fish herbivory on seagrass meadows of Guang-guang, Mati City, Philippines

Effects of fish herbivory on seagrass meadows of Guang-guang, Mati City, Philippines

Monitoring coral reef conditions in the Biorock Pemuteran rehabilitation area during the 2016 coral bleaching

Reclamation and sedimentation impacts around the Wairuhu River estuary, Poka-Galala threshold

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