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Assessment of microplastic characterization and distribution from surface water and the seabed in the Flores Sea, Indonesia
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Researchers surveyed microplastic pollution in the surface water and seabed of the Flores Sea in Indonesia, a key part of the ocean current system linking the Pacific and Indian Oceans. They found microplastic contamination at all sampling sites, with fibers being the most common type and polyethylene the dominant polymer. The study matters because ocean currents in this region can carry microplastics across vast marine ecosystems far from their source.
Despite growing global concerns, there has been limited research on the characterization and distribution of microplastics in the Indonesian Throughflow (ITF) pathways, such as the Flores Sea. The Flores Sea is a component of the Indian–Pacific Current, a significant ocean current system that links the Pacific and Indian oceans and has the capacity to carry pollution over large marine ecosystems, making this research extremely important. Understanding the microplastic pollution in this area informs local environmental management. It provides insights into how these currents may distribute microplastics (MPs) across regional and global scales, impacting marine life and human health far beyond the immediate area. To respond to these concerns, this research aims to determine the characterization and distribution of MPs at six research sites in the Flores Sea that are precisely located within the ITF. This work exhibits an extensive dataset focusing on the occurrence, attributes, and dispersion of microplastics in the Flores Sea. The water sampling was carried out during a Jala Citra 3 by the Indonesian Navy from April to May 2023. Sea surface water samples were collected using a Neuston net, while sediment samples were taken from three stations at the shallowest depth using the Ekman Grab sampler. Additionally, abundance, size, shape, and color analyses were conducted using a light microscope, and microplastic types were identified through Raman spectroscopy. The results indicated that the Flores Sea waters and sediment are polluted with microplastics, with relative abundances ranging from 0.75 ± 0.49 to 2.13 ± 0.25 items/l samples. The most dominant shapes identified were filament (77.45%) and fragment (13.40%), with sizes varying between surface water 4.70 to 3799.25 μm and seabed from 67.20 mm to 2176.87 mm, while black (30.07%) and blue (24.51%) were reported as the common MPs colors. The identified polymers include PET and PE. This study confirms visual evidence of microplastics in the open waters of eastern Indonesia. While it may not fully capture the wide range of temporal variations, it establishes initial microplastic presence and dispersion levels. Given that the ITF influences both the Pacific and Indian Oceans, this research contributes to the global understanding of microplastic distribution across ocean basins, underscoring the need for coordinated international efforts to address marine pollution.
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Microplastics were found in coral reef sediments in Sekotong, Lombok, Indonesia, with possible contributions from ocean current transport through the Indonesian Throughflow. The findings highlight that microplastic contamination has reached Indonesia's coral reef ecosystems, which are among the most biodiverse on Earth.
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Researchers measured microplastic abundance in the tropical Northwestern Pacific and Indonesian seas, finding very low concentrations in open-ocean currents but an order of magnitude higher levels in the Indonesian straits due to river runoff and current convergence patterns.
Tiny and Everywhere: Microplastic Density and Distribution in Sediments along the West Coast of Lombok Island, Indonesia
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Researchers found microplastics in sediments along the entire west coast of Lombok Island, Indonesia, with fibers being the most common type. The study documents widespread microplastic contamination in a region previously unstudied, raising concerns for local marine life and fishing communities.
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Researchers conducted the first investigation of vertical microplastic distribution in deep-sea waters along the Indonesian Throughflow pathway between the Pacific and Indian Oceans. The study found an average of about 1 microplastic particle per liter across depths from 5 to 2,450 meters, with water temperature and density influencing particle distribution, indicating that microplastic contamination extends throughout the ocean water column.
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Researchers conducted the first systematic field survey of microplastic pollution at the surface of the Northwestern Pacific Ocean, finding concentrations spanning two orders of magnitude and identifying polyethylene as the dominant polymer type, with the highest concentrations associated with convergence zones shaped by the Kuroshio Current and adjacent eddies.
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