文献类型：期刊文献

英文题名：Microplastics Alter Growth and Reproduction Strategy of Scirpus mariqueter by Modifying Soil Nutrient Availability

作者：Jiang, Pengcheng[1,2] Gao, Jingwen[1] Li, Junzhen[1] Wu, Ming[1] Shao, Xuexin[1] Li, Niu[1]

第一作者：Jiang, Pengcheng

通信作者：Li, N[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Wetland Ecosyst Res Stn Hangzhou Bay, Hangzhou 311400, Peoples R China;[2]Zhejiang Agr & Forestry Univ, Coll Forestry & Biotechnol, Hangzhou 311300, Peoples R China

年份：2025

卷号：17

期号：7

外文期刊名：DIVERSITY-BASEL

收录：;Scopus(收录号：2-s2.0-105011860627);WOS:【SCI-EXPANDED(收录号:WOS:001536771700001)】；

基金：This work was funded by Pioneer and Leading Goose R&D Program of Zhejiang (grant No. 2025C02050); Special Fund for Basic Scientific Research Operations of Central Public Welfare Research Institutes (grant No. CAFYBB2024MA029); the Zhejiang Provincial Science and Technology Program (grant No. 2023C03120); the Zhejiang Province Commonwealth Projects (grant No. LTGS24C160001).

语种：英文

外文关键词：microplastics; Scirpus mariqueter; coastal wetland; biomass; reproductive strategies; soil physicochemical properties; nitrogen limitation; ecosystem functions

摘要：Microplastic pollution threatens coastal wetland ecosystems, yet its impacts on the dominant plant species and soil properties remain poorly understood. We investigated the effects of four microplastic types (PP, PE, PS, PET) at three concentrations (0.1%, 0.5%, 1% w/w) on Scirpus mariqueter, a keystone species in the coastal wetlands of China, and the associated soil physicochemical properties. In a controlled pot experiment, microplastics significantly altered the plant biomass, vegetative traits, and reproductive strategies, with type-specific and concentration-dependent responses. PET and PE strongly suppressed the belowground and total biomass (p < 0.05), with reductions in the belowground biomass of 42.87% and 44.13%, respectively, at a 0.1% concentration. PP promoted seed production, particularly increasing the seed number by 25.23% at a 0.1% concentration (p < 0.05). The soil NH4+-N, moisture, and EC were key mediators, with NH4+-N declines linked to biomass reductions via nitrogen limitation. The Spearman correlations confirmed strong associations between the plant traits and soil properties, particularly nitrogen forms. These findings reveal that microplastics disrupt wetland plant performance and soil environments, potentially impairing carbon sequestration and ecosystem stability. Our study underscores the urgent need for microplastic risk assessments in coastal wetlands and highlights soil-microbe-plant interactions as critical mechanisms for future investigation.