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Yamahara S, Kubota R, Tun TZ, Nakata H. Source traceability of microplastics in road dust using organic/inorganic plastic additives as chemical indicators. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 932:172808. [PMID: 38719051 DOI: 10.1016/j.scitotenv.2024.172808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 04/22/2024] [Accepted: 04/25/2024] [Indexed: 05/12/2024]
Abstract
Microplastics (MPs) are environmental pollutants of great concern around the world. The source of MPs in road dust need to be identified to develop strategies to control and reduce MPs emissions by stormwater runoff, one of the main sources of MPs to the aquatic environment. However, little information on the sources of MPs in road dust is available due to lack of their suitable indicators. In this study organic/inorganic plastic additives were used as chemical indicators to understand the source of MPs in road dust. The polymers, organic additives, and heavy metals in 142 commercial plastic products suspected of being source of MPs in road dust were determined. As the results, 147 organic additives and 17 heavy metals were identified, and different additive profiles were found for different polymer types and use application of plastic products. Further, 17 road dust samples were collected from an urban area in Kumamoto City, Japan. and analyzed the MPs (1-5 mm diameter) and their additive chemicals. Polymethyl methacrylate (PMMA) was the dominant polymer accounting for 86 % in the samples, followed by ethylene vinyl acetate (EVA) and polyvinyl chloride (PVC). In total, 48 organic additives and 14 heavy metals were identified in the MPs samples. The organic/inorganic additive profiles of plastic products and MPs in road dust were compared, and several road dust-associated MPs had similar additive profiles to road paints, braille blocks, road marking sheets, and reflectors. This suggested that the MPs were originated from these plastics on the road surface. Road paint was the most important contributor of MPs in road dust (60 % of the MPs), followed by braille block (23 %), road marking sheet (8.3 %), and reflector (2.4 %). These results indicated that organic/inorganic plastic additives in plastic products can be used as chemical indicators to trace the sources of MPs in road dust.
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Affiliation(s)
- Shinnosuke Yamahara
- Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Reiji Kubota
- Division of Environmental Chemistry, National Institute of Health Science, 3-25-26 Tonomochi, Kawasaki-ku, Kanagawa 210-9501, Japan
| | - Thant Zin Tun
- Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Haruhiko Nakata
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
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Briffa M, Arnott G, Hardege JD. Hermit crabs as model species for investigating the behavioural responses to pollution. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167360. [PMID: 37774883 DOI: 10.1016/j.scitotenv.2023.167360] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/22/2023] [Accepted: 09/24/2023] [Indexed: 10/01/2023]
Abstract
Human impacts on the environment affect organisms at all levels of biological organisation and ultimately can change their phenotype. Over time, phenotypic change may arise due to selection but individual phenotypes are also subject to change via genotype × environment interactions. In animals, behaviour is the most flexible aspect of phenotype, and hence the most liable to change across environmental gradients including exposure to pollution. Here we review current knowledge on the impacts of pollution, broadly defined to include the release of substances, energy, and the effects of carbon emissions, on the behaviour of a highly studied group, the globally distributed hermit crabs. We first show how their obligate association with empty gastropod shells underpins their use as model organisms for the study of resource-assessment, contest, and risk-coping behaviours. Intense study of hermit crabs has advanced our understanding of how animals use information, and we discuss the ways in which pollutants can disrupt the cognitive processes involved. We then highlight current studies of hermit crabs, which paint a clear picture of behavioural changes due to multiple pollutants. Impacts on behaviour vary across pollutants and entire suites of behaviours can be influenced by a single pollutant, with the potential for interactive and cascade effects. Hermit crabs offer the opportunity for detailed behavioural analysis, including application of the repeated measures animal-personality framework, and they are highly amenable to experimental manipulations. As such, we show how they now provide a model system for studying the impacts of pollution on behaviour, yielding insights broadly applicable across animal diversity.
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Affiliation(s)
- Mark Briffa
- School of Biological and Marine Sciences, University of Plymouth, Plymouth PL4 8AA, UK.
| | - Gareth Arnott
- Queen's University Belfast, School of Biological Sciences, 19 Chlorine Gardens, Belfast BT9 5DL, Northern Ireland, UK
| | - Jörg D Hardege
- Scool of Natural Sciences, Biological Science, University of Hull, Cottingham Road, Hull HU6 7RX, UK
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Yang W, Tan Q, Qian S, Huang Y, Xu EG, Long X, Li W. Natural infochemical DMSP stimulates the transfer of microplastics from freshwater zooplankton to fish: An olfactory trap. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 265:106735. [PMID: 37984150 DOI: 10.1016/j.aquatox.2023.106735] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 10/20/2023] [Accepted: 10/26/2023] [Indexed: 11/22/2023]
Abstract
Natural infochemicals may largely affect the trophic transfer of microplastics (MPs) in ecosystems but such infochemical effect and mechanisms are poorly understood. Here, a daphnids-zebrafish freshwater microcosm was designed to elucidate whether and how an algae-derived infochemical, dimethylsulfoniopropionate (DMSP), affects the ingestion and transfer of MPs. Daphnids fast accumulated DMSP and MPs from water, and DMSP in daphnids was mainly enriched from the DMSP in water but not from MPs. DMSP did not change the MP ingestion by daphnids. A low concentration of DMSP (0.5 nM) increased predation of daphnids by zebrafish, while high concentrations of DMSP (50, 100 and 200 nM) did not increase predation rates. The concentration of DMSP in daphnids and the MP predation by zebrafish showed a unimodal relationship. The predation for MP by zebrafish in the 0.5 and 5 nM DMSP treatments was 1.89 and 1.56 times that of the control, respectively. The concentrations of DMSP in freshwater samples were lower than 50 nM. This suggests DMSP at environmentally relevant concentrations may promote the trophic transfer of MPs in freshwater ecosystems via olfactory traps.
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Affiliation(s)
- Wei Yang
- Department of Ecological Sciences and Engineering, Chongqing University, Chongqing 400045, China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Qian Tan
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, China
| | - Shenhua Qian
- Department of Ecological Sciences and Engineering, Chongqing University, Chongqing 400045, China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Yuyue Huang
- Department of Biology, University of Southern Denmark, Odense, 5230, Denmark
| | - Elvis Genbo Xu
- Department of Biology, University of Southern Denmark, Odense, 5230, Denmark
| | - Xizi Long
- Hunan Province Key Laboratory of Typical Environ. Pollut. and Health Hazards, School of Public Health, Hengyang Medical School, University of South China, Hengyang, 421001, China
| | - Wei Li
- Department of Ecological Sciences and Engineering, Chongqing University, Chongqing 400045, China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
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Inteca G, Hagy B, Silva I, Amoda C, Cululo A, Farooq H. The tourism industry keeps beaches clean in Mozambique. MARINE POLLUTION BULLETIN 2023; 196:115615. [PMID: 37804669 DOI: 10.1016/j.marpolbul.2023.115615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/29/2023] [Accepted: 10/01/2023] [Indexed: 10/09/2023]
Abstract
In this study, we conducted the first assessment of the litter abundance, diversity and predictors in Mozambique, by collecting approximately 2 tons of litter along six beaches across the country. We tested whether population, touristic industry, fishing, and recreation activities predict the quantity of macro litter for each of the 11 types and 141 subtypes of litter. Overall, we found that plastics made up 60.1 % of the items across all sampled beaches. Following plastics, clothing objects accounted for the second most weight (20.4 %) while foam objects were the second most abundant (15.7 %). More importantly, our results show that the tourism industry is a strong predictor for lower levels of litter across most types of litter while population density and fishing activity were strong predictors for higher levels. Our findings suggest that the tourism industry plays a crucial role in the country by maintaining the beaches clean.
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Affiliation(s)
- Gélica Inteca
- Faculty of Natural Sciences, Lúrio University, P.O. Box 958, Pemba, Mozambique.
| | - Badru Hagy
- Oceanographic Institute of Mozambique, P.O. Box 4603, Maputo, Mozambique
| | - Isabel Silva
- Faculty of Natural Sciences, Lúrio University, P.O. Box 958, Pemba, Mozambique
| | - Carlota Amoda
- Oceanographic Institute of Mozambique, P.O. Box 4603, Maputo, Mozambique
| | - Aniceto Cululo
- Faculty of Natural Sciences, Lúrio University, P.O. Box 958, Pemba, Mozambique
| | - Harith Farooq
- Faculty of Natural Sciences, Lúrio University, P.O. Box 958, Pemba, Mozambique; Center for Macroecology, Evolution and Climate, Globe Institute, University of Copenhagen, P.O. Box 2100, Copenhagen, Denmark; Gothenburg Global Biodiversity Centre, University of Gothenburg, Gothenburg, P.O. Box 461, 405 30 Gothenburg, Sweden
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Short-Term Microplastic Exposure Impairs Cognition in Hermit Crabs. Animals (Basel) 2023; 13:ani13061055. [PMID: 36978596 PMCID: PMC10044271 DOI: 10.3390/ani13061055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 02/23/2023] [Accepted: 03/10/2023] [Indexed: 03/17/2023] Open
Abstract
We tested whether acute microplastic exposure impacts information gathering and processing (cognition) in hermit crabs (Pagurus bernhardus). For five days, we kept 51 hermit crabs in tanks containing either polyethylene microspheres (n = 27) or no plastic (n = 24). We then transferred individuals into an intermediate-quality shell and presented them with two vials containing either a better or worse shell. Because touching both shell vials required an equivalent behavioural response, this design controlled for general activity. Plastic-exposed hermit crabs were less likely and slower than controls to touch the better shell vial, instead preferring the worse shell vial. Microplastics, therefore, impaired assessments and decision-making, providing direct evidence of acute microplastic exposure disrupting hermit crab cognition.
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Nontarget analysis and characterization of alkylamides in electrical product plastics by gas chromatography-positive chemical ionization quadrupole-orbitrap high-resolution mass spectrometry and quasi-molecular ion screening and anchoring algorithm. J Chromatogr A 2022; 1682:463466. [DOI: 10.1016/j.chroma.2022.463466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/30/2022] [Accepted: 08/31/2022] [Indexed: 11/22/2022]
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