Microplastics alter nitrous oxide production and pathways through affecting microbiome in estuarine sediments

微塑料 环境化学 一氧化二氮 河口 环境科学 微生物群 化学 生产(经济) 环境工程 生态学 生物 生物信息学 经济 宏观经济学
作者
Cheng Chen,Jiongyu Pan,Shuxin Xiao,Jiayi Wang,Xiaoluo Gong,Guoyu Yin,Lijun Hou,Min Liu,Yanling Zheng
出处
期刊:Water Research [Elsevier BV]
卷期号:221: 118733-118733 被引量:105
标识
DOI:10.1016/j.watres.2022.118733
摘要

Increasing microplastics (MPs) pollution in estuaries profoundly impacts microbial ecosystems and biogeochemical processes. Nitrous oxide (N2O), a powerful greenhouse gas, is an important intermediate product of microbial nitrogen cycling. However, how MPs regulate N2O production and its pathways remain poorly understood. Here, impacts of traditional petroleum-based and emerging biodegradable MPs on microbial N2O production and its pathways were studied through dual-isotope (15N-18O) labeling technique and molecular methods. Results indicated that both traditional petroleum-based and emerging biodegradable MPs promoted sedimentary N2O production, whereas pathways varied. Biodegradable polylactic acid (PLA) MPs displayed greater promotion of N2O production than petroleum-based MPs, polyvinyl chloride (PVC) and polyethylene (PE), of which PLA promoted through nitrifier nitrification (NN) and heterotrophic denitrification (HD), PE through nitrifier denitrification and HD, and PVC through NN. By combining the analysis of N2O production rates with sediment chemical and microbiological properties, we demonstrated that the enrichment of nitrifying and denitrifying bacteria, as well as related functional genes directly and/or indirectly increased N2O production primarily by interacting with carbon and nitrogen substrates. Different response of nitrogen cycling microbes to MPs led to the difference in N2O increase pathways, of which nitrifying bacteria significantly enriched in all MPs treatments due to the niches provided by MPs. However, part of denitrifying bacteria significantly enriched in treatments containing PLA and PE MPs, which may serve as organic carbon substrates. This work highlights that the presence of MPs can promote sedimentary N2O production, and the emerging biodegradable MPs represented by PLA may have a greater potential to enhance estuarine N2O emissions and accelerate global climate change.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
M旭旭发布了新的文献求助10
2秒前
科研通AI2S应助scsc采纳,获得10
2秒前
3秒前
清新的夏烟完成签到,获得积分10
3秒前
飞云完成签到,获得积分10
3秒前
椰青冰萃发布了新的文献求助30
4秒前
4秒前
Owen应助野性的博涛采纳,获得10
5秒前
马康辉发布了新的文献求助10
5秒前
5秒前
8秒前
111应助快乐小汉堡采纳,获得10
8秒前
执念完成签到 ,获得积分10
8秒前
慕青应助Guochunbao采纳,获得10
8秒前
M旭旭完成签到,获得积分10
8秒前
9秒前
9秒前
lbx发布了新的文献求助10
9秒前
10秒前
10秒前
七慕凉应助外向跳跳糖采纳,获得10
12秒前
12秒前
13秒前
开朗安筠完成签到,获得积分20
13秒前
zfg发布了新的文献求助10
14秒前
英俊的铭应助研友_n2Q9KL采纳,获得10
15秒前
喻踏歌发布了新的文献求助10
15秒前
呵呵完成签到 ,获得积分10
15秒前
mmmm发布了新的文献求助10
15秒前
董海涛发布了新的文献求助10
15秒前
张建发布了新的文献求助10
16秒前
17秒前
寒冷半雪完成签到,获得积分10
17秒前
20秒前
苏我入鹿发布了新的文献求助200
22秒前
schen完成签到,获得积分10
22秒前
22秒前
23秒前
25秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 1000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 310
The Moiseyev Dance Company Tours America: "Wholesome" Comfort during a Cold War 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3979946
求助须知:如何正确求助?哪些是违规求助? 3524093
关于积分的说明 11219832
捐赠科研通 3261529
什么是DOI,文献DOI怎么找? 1800686
邀请新用户注册赠送积分活动 879263
科研通“疑难数据库(出版商)”最低求助积分说明 807226