Key Role of Vegetation Cover in Alleviating Microplastic-Enhanced Carbon Emissions

作者：Zelin Hou, Fan Mo, Qixing Zhou, Yingying Xie, X. Liu, Tong Zheng, Zongxin Tao · 发表于：Environmental Science & Technology · 年份：2024 · DOI：10.1021/acs.est.3c10017 · 被引用次数：22 · 研究领域：Microplastics and Plastic Pollution、biodegradable polymer synthesis and properties

originating from highly bioavailable active dissolved organic matter molecules (<380 °C, predominantly polysaccharides) was converted from persistent carbon (380-650 °C, predominantly aromatic compounds) rather than PSMP derivatives. However, the priming effect of PSMP derivatives was weakened in plant-driven soils (resistivity: shrub > tree > grass). This can be explained from two perspectives: (1) Plant residue-driven humification processes reduced the percentage of bioavailable active dissolved organic matter derived from the priming effects of PSMPs. (2) Plant residues accelerated bacterial community succession (dominated by plant residue types) but slowed fungal community demise (retained carbon turnover-related functional taxa), enabling specific enrichment of glycolysis, the citric acid cycle and the pentose phosphate pathway. These results provide a necessary theoretical basis to understand the role of plant residues in reducing PSMP harm at the ecological level and refresh knowledge about the importance of biodiversity for ecosystem stability.