体型较大的普通河蛙（Amietia delalandii）体内的组织微塑料纤维比体型较小的河蛙更少且更短。
Larger Common River Frogs (Amietia delalandii) have Fewer and Shorter Tissue Microplastic Fibres than Smaller Frogs.
机构信息
Research Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa.
South African Institute for Aquatic Biodiversity, Herpetology, Makhanda, South Africa.
出版信息
Bull Environ Contam Toxicol. 2024 Jan 28;112(2):29. doi: 10.1007/s00128-024-03852-7.
Little is known about microplastics (MPs) in adult frogs. We investigated MPs in adult Common River Frogs (Amietia delalandii) from Potchefstroom, South Africa. Five kinds of samples were analysed: natural water, water used to rinse the skin, skin, intestine, and the remainder of the body (corpus). Tissues were digested. Microplastics occurred in all frogs and sample types (1128 MPs counted). Fibres were the most prevalent MP. Fibre lengths were between 28 and 4300 μm, either polyester or polyvinyl alcohol. MPs in skin were likely derived from the ambient, and MPs in the corpus from translocation via the skin. Fibres in tissues were significantly shorter in larger frogs, a phenomenon we provisionally assign to in situ biodegradation. Microplastics in frogs can potentially be transferred through the food web to higher trophic levels. This study provides the first evidence of MPs in adult frog tissues and avenues for further investigations.
关于成年青蛙中的微塑料（MPs）知之甚少。我们研究了来自南非波切夫斯特鲁姆的普通河蛙（Amietia delalandii）成体中的 MPs。分析了五种样品：天然水、用于冲洗皮肤的水、皮肤、肠和剩余的身体（主体）。组织被消化。所有青蛙和样本类型都出现了微塑料（共计数 1128 个 MPs）。纤维是最常见的 MP。纤维长度在 28 到 4300μm 之间，为聚酯或聚乙烯醇。皮肤中的 MPs 可能来自环境，而主体中的 MPs 则可能通过皮肤转移而来。组织中的纤维在较大的青蛙中明显更短，我们暂时将这种现象归因于原位生物降解。青蛙中的微塑料可能通过食物网转移到更高的营养级。本研究首次提供了成年青蛙组织中存在 MPs 的证据，并为进一步研究提供了途径。
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