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This study measured spatial distribution of marine debris stranded on beaches in South Eleuthera, The Bahamas. Citizen science, fetch modeling, relative exposure index and predictive mapping were used to determine marine debris source and abundance. Citizen scientists quantified debris type and abundance on 16 beaches within three coastal exposures (The Atlantic Ocean, Great Bahama Bank and The Exuma Sound) in South Eleuthera. Marine debris, (~2.5 cm or larger) on each beach was monitored twice between March-May and September-November 2013 at the same locations using GPS. Approximately, 93% of all debris items were plastic with plastic fragments (≤2.5 cm) being the most common. There were spatial differences (p ≤ 0.0001) in plastic debris abundance between coastal exposures. Atlantic Ocean beaches had larger quantities of plastic debris by weight and by meter (m) of shoreline. Stranded plastic may be associated with Atlantic Ocean currents associated with leakage from the North Atlantic sub-tropical gyre.
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http://dx.doi.org/10.1016/j.marpolbul.2019.03.036 | DOI Listing |
J Vis Exp
August 2025
School of Marine and Atmospheric Science, Stony Brook University.
The protocol presented here enables the quantification of microplastics (MPs) as small as ~1 µm in diameter, accurate identification of polymer types, and estimation of particle volume, critically allowing for the calculation of MP mass. Representative results from samples collected in the Great South Bay (GSB), NY, showed that particles within the 1-6 µm equivalent spherical diameter (ESD) range were the most abundant, with approximately 75% of particles measuring less than 5 µm. Notably, the pre-sieving step failed to yield any particles larger than 60 µm, suggesting that large MPs were rare at the coastal sites sampled.
View Article and Find Full Text PDFChemosphere
September 2025
Azerbaijan National Academy of Sciences, Institute of Geography, Baku, AZ1073, Azerbaijan.
This study presents the first integrated assessment of plastic pollution at the Kura River delta, where the river enters the hydrologically enclosed Caspian Sea. We applied a modular toolbox comprising four complementary components: high-resolution hydrodynamic modeling to predict debris convergence zones, UAV-based mapping to survey shoreline conditions, automated object-based image analysis for debris detection and classification, and standardized field monitoring by trained community participants for ground-truthing and source identification. Using this framework, we identified debris accumulation hotspots and developed a replicable approach for assessing plastic pollution in semi-enclosed systems.
View Article and Find Full Text PDFFish Shellfish Immunol
September 2025
Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China; Laboratory of Marine Fisheries Science and Food Production Process, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; Liaoning Key Laboratory
The primitive innate immune cells (termed haemocytes) initially evolved in molluscs, which are analogous to vertebrate leukocytes, displaying significant morphological and functional heterogeneity. Elucidating the diversity morphology and functions of haemocytes is crucial to understanding the ancient immune system. In the present study, six novel haemocyte subtypes, including pro-haemocytes, larger agranulocytes, secretory haemocytes, amoeba phagocytes, macrophages and dendritic (DC)-like haemocytes were identified by their specific morphological and functional characteristics in oyster circulating haemolymph.
View Article and Find Full Text PDFMar Environ Res
August 2025
Centre Oceanogràfic de les Balears, Spanish Institute of Oceanography (COB-IEO/CSIC), Mallorca, Spain.
Identifying the sources of pollutants remains as one of the main challenges in research on marine debris pollution, which mainly consists of what is known as marine litter. In this work, we develop a method to estimate the origin of marine debris found along the coasts of the Balearic Islands during the summers of 2014-2021. We combine detailed records from coastal clean-up campaigns with ocean currents simulations from a high-resolution model to perform a probabilistic tracking of debris motion.
View Article and Find Full Text PDFData Brief
October 2025
Aquatic Science Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Jl. Kampus UNSRAT Bahu, Manado 95115, North Sulawesi, Indonesia.
Data is presented on the macro and meso size, weight, and number of items for a variety of beach litter types collected from Manado Bay, Northern Sulawesi, Indonesia, which lies within the Coral Triangle. The data, both raw and partly processed, were collected over 5 years (2018 to 2022) using the internationally standard method for monitoring marine debris, which has been adopted by Indonesia. The classification is based on 9 material types: (1) plastics (PL), (2) foamed plastics (FP), (3) cloth (CL), (4) glass and ceramics (GC), (5) metal (ME), (6) other type of litter (OT), (7) paper and cardboard (PC), (8) rubber (RB), and (9) wood (WD), and further broken down into subcategories.
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