Abundance and Characteristics of Microplastics in Seawater and Corals From Reef Region of Sanya Bay, China

Lei, Xinming; Cheng, Hao; Luo, Ya‐Huang; Zhang, Yuyang; Jiang, Lei; Sun, Yuhan; Zhou, Guowei; Huang, Hui

doi:10.3389/fmars.2021.728745

Cited by 17 publications

(4 citation statements)

References 45 publications

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“…Polyamide and polyurethane detected in sea urchins were also discovered in coral reef ecosystem (Saliu et al, 2019). Polyethylene and polypropelene polymers found in sediments have been found in several coral reef environments (Tan et al, 2020;Lei et al, 2021;Raguso et al, 2022;Saliu et al, 2022, Patterson et al, 2022. Moreover, polyethylene, polyester, polypropylene, polyamide, and polyurethane polymers have also been identified in sea urchins .…”

Section: Polymer Of Microplasticsmentioning

confidence: 89%

Characteristic of Microplastic on Coral Reef Sediment and Sea Urchin (Diadema sp.) in Tidung Island, Jakarta Bay, Indonesia

Sulistiowati,

Zamani,

Bengen

et al. 2023

Indo. J. Mar. Sci.

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Microplastics are recognized as common contaminants of coral ecosystem in Tidung Island, affecting both sediment and sea urchins residing in this environment. Therefore, this study aimed to determine the characteristics of microplastics found in sediment, the mouth, and the digestive system of sea urchins (Diadema sp.), assessing the relationship between coral cover percentage and microplastic type and size, and the transfer of microplastics from sediment to sea urchins. Sampling was conducted twice, namely in October 2021 and October 2022. Microplastics in sediments were extracted using ZnCl2. The destruction process of sea urchins used 30% H2O2 and FeSO4.7H2O, while the microplastics were identified with Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR). The results showed that the microplastics found in the sediments and sea urchins were similar in terms of shape, color, size, and plastic polymers. The forms of microplastics found in this study were fibre, fragment, and foam with fibre predominance, based on the results obtained. The size of microplastics found in sediments and sea urchins was dominated by sizes >1000 µm. Fibres were found in hard coral (HC) and dead coral (DC) conditions while fragments and foams were present in turf algae (TA), sponge (SP), and soft coral (SC) conditions. The microplastics found in sea urchins originate in part from sediments because they have similar characteristics. Sea urchins ingested microplastics from sediment, particularly those grown by algae as a food source. The increase in the number of microplastics found in sediment could potentially result in higher abundance in the biota.

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Section: Polymer Of Microplasticsmentioning

confidence: 89%

Characteristic of Microplastic on Coral Reef Sediment and Sea Urchin (Diadema sp.) in Tidung Island, Jakarta Bay, Indonesia

Sulistiowati,

Zamani,

Bengen

et al. 2023

Indo. J. Mar. Sci.

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“…High microplastic concentrations were detected in the seawater and surface sediment of the three stations, which is basically consistent with previous studies that the microplastic concentrations were 15.50−22.14 particles L −1 in the seawater in Sanya Bay and 41.18−750.63 particles kg −1 in the surface sediment around Hainan Island. 57,58 Such high microplastic concentrations along the coast of Hainan Island are likely ascribed to intense human activities and river input. 59 Meanwhile, the highest microplastic concentration in seawater was observed in May for all stations, while the microplastic contents in surface sediments were relatively higher in July.…”

Section: Discussionmentioning

confidence: 99%

High Heterotrophic Plasticity of Massive Coral Porites pukoensis Contributes to Its Tolerance to Bioaccumulated Microplastics

Zhou

Tang

Cao

et al. 2023

Environ. Sci. Technol.

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Scleractinian corals have been observed to be capable of accumulating microplastics from reef environments; however, the tolerant mechanism is poorly known. Here, we examined the response of Porites pukoensis to microplastic pollution by analyzing algal symbiont density, energetic metabolism, and caspase3 activities (representing the apoptosis level) in the coral–Symbiodiniaceae association. The environments of three fringing reef regions along the south coast of Sanya City, Hainan Province of China, were polluted by microplastics (for example, microplastic concentrations in the seawater ranged from 3.3 to 46.6 particles L–1), resulting in microplastic accumulation in P. pukoensis (0.4–2.4 particles cm–2). The accumulation of microplastics was negatively correlated to algal symbiont density in the corals but not to caspase3 activities in the two symbiotic partners, demonstrating that P. pukoensis could tolerate accumulated microplastics despite the decrease of algal symbiont density. Furthermore, results from the carbon stable isotope and cellular energy allocation assay indicated that P. pukoensis obtained energy availability (mainly as lipid reserves) using the switch between heterotrophy and autotrophy to maintain energy balance and cope with accumulated microplastics. Collectively, P. pukoensis achieved tolerance to microplastic pollution by maintaining energy availability, which was largely attributed to its high heterotrophic plasticity.

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“…confocal hole of 50 μm, objective magnification of 10/50, and spectral correlation matching mode was used. When the matching degree reaches 70%, it can be confirmed as a certain type of polymer [9]. Through the Terrain Mosaic function, microplastic images are obtained, and information such as the size, shape, and type of microplastics are measured and recorded.…”

Section: Sampling Pretreating and Evaluation Methodsmentioning

confidence: 99%

Study on Pollution Characteristics and Ecological Risks of Microplastics in Ningyuan River

Qiao

Gao

2023

E3S Web of Conf.

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A survey was conducted on the surface water samples of Ningyuan River in Hainan Province. The samples were collected through on-site filtration and concentration methods, and pretreated through oxidation digestion and density separation. The microplastics were statistically analyzed by confocal micro-Raman spectrometer, elucidating the abundance, type, particle size, and shape characteristics of the microplastics in the water samples. Seasonal differences were analyzed, and the main conclusions were as follows: microplastics were detected at all sampling points, with the abundance range of 66.67 items/m3 to 1106.67 items/m3; polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), and polystyrene (PS) are the main types of microplastics; 100-1000 μm is the main particle size distribution range; the proportion order of microplastics with different shapes is fiber> fragment> film> particle. In terms of spatial distribution, there are significant differences due to the influence of functional zones along the river banks, while in terms of seasonal distribution, there is no significant difference between dry and rainy seasons; The overall level of microplastic pollution belongs to a medium to low risk.

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Abundance and Characteristics of Microplastics in Seawater and Corals From Reef Region of Sanya Bay, China

Cited by 17 publications

References 45 publications

Characteristic of Microplastic on Coral Reef Sediment and Sea Urchin (Diadema sp.) in Tidung Island, Jakarta Bay, Indonesia

Characteristic of Microplastic on Coral Reef Sediment and Sea Urchin (Diadema sp.) in Tidung Island, Jakarta Bay, Indonesia

High Heterotrophic Plasticity of Massive Coral Porites pukoensis Contributes to Its Tolerance to Bioaccumulated Microplastics

Study on Pollution Characteristics and Ecological Risks of Microplastics in Ningyuan River

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