干旱区生态环境知识资源中心(Arid): Plastic footprint deteriorates dryland carbon footprint across soil-plant-atmosphere continuum

Arid

DOI	10.1016/j.envint.2024.108632
	Plastic footprint deteriorates dryland carbon footprint across soil-plant-atmosphere continuum
	Li, Meng-Ying; Wang, Wei; Ma, Yue; Chen, Yinglong; Tao, Hong-Yan; Zhao, Ze-Ying; Wang, Peng -Yang; Zhu, Li; Ma, Baoluo; Xiao, Yun-Li; Li, Shi-Sheng; Ashraf, Muhammad; Wang, Wen-Ying; Xiong, Xiao-Bin; Zhu, Ying; Zhang, Jin-Lin; Irum, Momena; Song, Ya-Jie; Kavagi, Levis; Xiong, You-Cai
通讯作者	Xiong, YC
来源期刊	ENVIRONMENT INTERNATIONAL
ISSN	0160-4120
EISSN	1873-6750
出版年	2024
卷号	186
英文摘要	Plastic fragments are widely found in the soil profile of terrestrial ecosystems, forming plastic footprint and posing increasing threat to soil functionality and carbon (C) footprint. It is unclear how plastic footprint affects C cycling, and in particularly permanent C sequestration. Integrated field observations (including (13) C labelling) were made using polyethylene and polylactic acid plastic fragments (low-, medium- and high-concentrations as intensifying footprint) landfilling in soil, to track C flow along soil - plant-atmosphere continuum (SPAC). The result indicated that increased plastic fragments substantially reduced photosynthetic C assimilation ( p < 0.05), regardless of fragment degradability. Besides reducing C sink strength, relative intensity of C emission increased significantly, displaying elevated C source. Moreover, root C fixation declined significantly from 21.95 to 19.2 mg m - 2 , and simultaneously root length density, root weight density, specific root length and root diameter and surface area were clearly reduced. Similar trends were observed in the two types of plastic fragments ( p > 0.05). Particularly, soil aggregate stability was significantly lowered as affected by plastic fragments, which accelerated the decomposition rate of newly sequestered C ( p < 0.05). More importantly, net C rhizodeposition declined averagely from 39.77 to 29.41 mg m(-2) , which directly led to significant decline of permanent C sequestration in soil. Therefore, increasing plastic footprint considerably worsened C footprint regardless of polythene and biodegradable fragments. The findings unveiled the serious effects of plastic residues on permanent C sequestration across SPAC, implying that current C assessment methods clearly overlook plastic footprint and their global impact effects.
英文关键词	Plastic footprint Dryland C footprint Root traits Permanent C sequestration SPAC
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001224752000001
WOS关键词	AGGREGATE STABILITY ; ROOT TRAITS ; GROWTH ; OASIS ; FILM
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403528
推荐引用方式 GB/T 7714	Li, Meng-Ying,Wang, Wei,Ma, Yue,et al. Plastic footprint deteriorates dryland carbon footprint across soil-plant-atmosphere continuum[J],2024,186.
APA	Li, Meng-Ying.,Wang, Wei.,Ma, Yue.,Chen, Yinglong.,Tao, Hong-Yan.,...&Xiong, You-Cai.(2024).Plastic footprint deteriorates dryland carbon footprint across soil-plant-atmosphere continuum.ENVIRONMENT INTERNATIONAL,186.
MLA	Li, Meng-Ying,et al."Plastic footprint deteriorates dryland carbon footprint across soil-plant-atmosphere continuum".ENVIRONMENT INTERNATIONAL 186(2024).