Microplastics alter crystal growth in coral skeleton structures

IF 15 2区 环境科学与生态学 Q1 CHEMISTRY, MULTIDISCIPLINARY Environmental Chemistry Letters Pub Date : 2024-11-01 DOI:10.1007/s10311-024-01790-8
Pei-Ying Lin, Shu-Ling Hsieh, De-Sing Ding, Chen-Tung Arthur Chen, David E. Beck, Shuchen Hsieh
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Abstract

Microplastics have emerged as a global environmental issue, inducing harmful effects on marine ecosystems and biodiversity. Their small size allows them to easily disperse across different ecosystems and enter the marine food chain, increasingly threatening coral ecosystems. This study hypothesizes that exposure to polyethylene microplastics alters the structure of coral skeletons. To test this, Briareum violacea corals were cultured under controlled conditions and exposed to polyethylene microplastics at concentrations of 0, 5, 10, 50, 100, and 300 mg/L for seven days. Skeletal structures were analyzed using X-ray diffraction, while inductively coupled plasma mass spectrometry was employed to assess changes in skeletal solubility and measure total calcium ion concentrations in seawater. The results revealed a transformation of coral skeletons from aragonite calcium carbonate crystals to amorphous calcium carbonate, as observed through X-ray diffraction analysis, with polyethylene microplastics causing this transformation to begin at a concentration of 10 mg/L. Additionally, skeletal solubility increased by 7.4-fold, as inferred from calcium ion concentrations measured by inductively coupled plasma mass spectrometry. Here we demonstrate that polyethylene microplastic exposure directly drives the degradation of coral skeletons, emphasizing the urgency of mitigating plastic pollution to safeguard coral ecosystems.

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微塑料改变了珊瑚骨骼结构中的晶体生长
微塑料已成为一个全球环境问题,对海洋生态系统和生物多样性造成有害影响。微塑料体积小,很容易分散到不同的生态系统中,并进入海洋食物链,日益威胁着珊瑚生态系统。本研究假设,接触聚乙烯微塑料会改变珊瑚骨骼的结构。为了验证这一假设,在受控条件下培养了 Briareum violacea 珊瑚,并将其暴露于浓度为 0、5、10、50、100 和 300 毫克/升的聚乙烯微塑料中七天。利用 X 射线衍射分析了骨骼结构,同时采用电感耦合等离子体质谱法评估了骨骼溶解度的变化,并测量了海水中钙离子的总浓度。X 射线衍射分析结果表明,珊瑚骨骼从文石碳酸钙晶体转变为无定形碳酸钙,聚乙烯微塑料在浓度为 10 毫克/升时开始导致这种转变。此外,根据电感耦合等离子体质谱法测得的钙离子浓度推断,骨骼溶解度增加了 7.4 倍。在这里,我们证明了接触聚乙烯微塑料会直接导致珊瑚骨骼退化,从而强调了减轻塑料污染以保护珊瑚生态系统的紧迫性。
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来源期刊
Environmental Chemistry Letters
Environmental Chemistry Letters 环境科学-工程:环境
CiteScore
32.00
自引率
7.00%
发文量
175
审稿时长
2 months
期刊介绍: Environmental Chemistry Letters explores the intersections of geology, chemistry, physics, and biology. Published articles are of paramount importance to the examination of both natural and engineered environments. The journal features original and review articles of exceptional significance, encompassing topics such as the characterization of natural and impacted environments, the behavior, prevention, treatment, and control of mineral, organic, and radioactive pollutants. It also delves into interfacial studies involving diverse media like soil, sediment, water, air, organisms, and food. Additionally, the journal covers green chemistry, environmentally friendly synthetic pathways, alternative fuels, ecotoxicology, risk assessment, environmental processes and modeling, environmental technologies, remediation and control, and environmental analytical chemistry using biomolecular tools and tracers.
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