Microplastics ingestion induces plasticity in digestive morphology in larvae of Xenopus laevis

微塑料 摄入 生物 动物 幼虫 爪蟾 营养物 生态学 表型可塑性 内分泌学 生物化学 基因
作者
Katharina Ruthsatz,Marie Domscheit,Karolin Engelkes,Miguel Vences
出处
期刊:Comparative Biochemistry and Physiology A-molecular & Integrative Physiology [Elsevier]
卷期号:269: 111210-111210 被引量:11
标识
DOI:10.1016/j.cbpa.2022.111210
摘要

Global changes in temperature, predator introductions, and pollution might challenge animals by altering food conditions. A fast-growing source of environmental pollution are microplastics. If ingested with the natural food source, microplastics act as artificial fibers that reduce food quality by decreasing nutrient and energy density with possible ramifications for growth and development. Animals might cope with altered food conditions with digestive plasticity. We examined experimentally whether larvae of the African clawed frog (Xenopus laevis) exhibit digestive morphology plasticity (i.e., gut length, mass, and diameter) in response to microplastics ingestion. As natural systems contain non-digestible particles similar in size and shape to microplastics, we included cellulose as a natural fiber control group. Gut length and mass increased in response to microplastics and cellulose ingestion indicating that both types of fibers induced digestive plasticity. Body mass and body condition were similar across experimental groups, indicating that larvae fully compensated for low nutrient and energy density by developing longer intestines. The ability of a species to respond plastically to environmental variation, as X. laevis responded, indicates that this species might have the potential to cope with new conditions during global change, although it is uncertain whether this potential may be reduced in a multi-stressor environment.
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