globalchange  > 气候变化事实与影响
DOI: 10.1016/j.scitotenv.2019.01.040
WOS记录号: WOS:000457725700027
论文题名:
Effects of four years of elevated ozone on microbial biomass and extracellular enzyme activities in a semi-natural grassland
作者: Wang, Jinyang1; Hayes, Felicity2; Turner, Robert1; Chadwick, David R.1; Mills, Gina2; Jones, Davey L.1,3
通讯作者: Wang, Jinyang
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
ISSN: 0048-9697
EISSN: 1879-1026
出版年: 2019
卷: 660, 页码:260-268
语种: 英语
英文关键词: (semi-)Natural vegetation ; Climate change ; Hydrolytic enzymes ; FACE ; Soil aggregates
WOS关键词: COMMUNITY COMPOSITION ; CARBON-DIOXIDE ; TROPOSPHERIC OZONE ; EXTRACTION METHOD ; ORGANIC-MATTER ; SOIL ; O-3 ; CO2 ; TREES ; METAANALYSIS
WOS学科分类: Environmental Sciences
WOS研究方向: Environmental Sciences & Ecology
英文摘要:

Reduced belowground carbon (C) allocation by plants exposed to ozone may change properties and activities of the microbial community in soils. To investigate how soil microbial biomass and extracellular enzyme activities respond to elevated ozone, we collected soils from a temperate grassland after four years of ozone exposure under fully open-air field conditions. We measured soil microbial biomass, the metabolism of low molecular weight C substrates and hydrolytic extracellular enzyme activities in both bulk soil and isolated aggregates to assess changes in microbial activity and community function. After four years of elevated ozone treatment, soil total organic C was reduced by an average of 20% compared with ambient condition. Elevated ozone resulted in a small but insignificant reduction (4-10%) in microbial biomass in both bulk soil and isolated aggregates. Activities of extracellular enzymes were generally not affected by elevated ozone, except beta-glucosidase, whose activity in bulk soil was significantly lower under elevated ozone than ambient condition. Activities of beta-glucosidase, leucine aminopeptidase and acid phosphatase were higher in microaggregates (<0.25 mm) as compared to macro-aggregates (>0.25 mm). Elevated ozone had no effects on mineralization rates of low molecular weight C substrates in both bulk soil and isolated aggregates. We therefore conclude that the size and activity rather than function of the soil microbial community in this semi-natural grassland are altered by elevated ozone. (c) 2019 Elsevier B.V. All rights reserved.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/134228
Appears in Collections:气候变化事实与影响

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作者单位: 1.Bangor Univ, Sch Nat Sci, Environm Ctr Wales, Bangor LL57 2UW, Gwynedd, Wales
2.Ctr Ecol & Hydrol, Environm Ctr Wales, Bangor LL57 2UW, Gwynedd, Wales
3.Univ Western Australia, UWA Sch Agr & Environm, Crawley, WA 6009, Australia

Recommended Citation:
Wang, Jinyang,Hayes, Felicity,Turner, Robert,et al. Effects of four years of elevated ozone on microbial biomass and extracellular enzyme activities in a semi-natural grassland[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019-01-01,660:260-268
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