DOI: 10.1016/j.atmosenv.2014.05.073
Scopus记录号: 2-s2.0-84902970063
论文题名: Current ozone levels threaten gross primary production and yield of Mediterranean annual pastures and nitrogen modulates the response
作者: Calvete-Sogo H ; , Elvira S ; , Sanz J ; , González-Fernández I ; , García-Gómez H ; , Sánchez-Martín L ; , Alonso R ; , Bermejo-Bermejo V
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 95 起始页码: 197
结束页码: 206
语种: 英语
英文关键词: Annual grasslands interactions
; Critical levels
; Dehesa
; Global change
; Nitrogen
; Tropospheric ozone
Scopus关键词: Biodiversity
; Biomass
; Carbon dioxide
; Ecosystems
; Nitrogen
; Ozone
; Troposphere
; Annual grassland
; Critical level
; Dehesa
; Global change
; Tropospheric ozone
; Agriculture
; nitrogen
; ozone
; aboveground biomass
; atmospheric deposition
; biodiversity
; carbon cycle
; global change
; growth rate
; nitrogen
; ozone
; pasture
; physiological response
; primary production
; article
; biomass production
; Briza maxima
; canopy
; clover
; Cynosurus echinatus
; dry weight
; ecosystem
; gas exchange
; grassland
; gross national product
; growth rate
; limit of detection
; Ornithopus compressus
; pasture
; priority journal
; Silene
; Silene gallica
; spatial soil variability
; Trifolium cherleri
; Trifolium striatum
; Mediterranean Region
; Spain
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Pastures are among the most important ecosystems in Europe considering their biodiversity and distribution area. However, their response to increasing tropospheric ozone (O3) and nitrogen (N) deposition, two of the main drivers of global change, is still uncertain. A new Open-Top Chamber (OTC) experiment was performed in central Spain, aiming to study annual pasture response to O3 and N in close to natural growing conditions. A mixture of six species of three representative families was sowed in the field. Plants were exposed for 40 days to four O3 treatments: filtered air, non-filtered air (NFA) reproducing ambient levels and NFA supplemented with 20 and 40nll-1 O3. Three N treatments were considered to reach the N integrated doses of "background",+20 or+40kgNha-1. Ozone significantly reduced green and total aboveground biomass (maximum reduction 25%) and increased the senescent biomass (maximum increase 40%). Accordingly, O3 decreased community Gross Primary Production due to both a global reduction of ecosystem CO2 exchange and an increase of ecosystem respiration. Nitrogen could partially counterbalance O3 effects on aboveground biomass when the levels of O3 were moderate, but at the same time O3 exposure reduced the fertilization effect of higher N availability. Therefore, O3 must be considered as a stress factor for annual pastures in the Mediterranean areas. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81069
Appears in Collections: 气候变化事实与影响
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作者单位: Ecotoxicology of Air Pollution, CIEMAT (Edif. 70), Avda. Complutense 40, 28040 Madrid, Spain; ETSI Agrónomos, Technical University of Madrid, Ciudad Universitaria, 28040 Madrid, Spain
Recommended Citation:
Calvete-Sogo H,, Elvira S,, Sanz J,et al. Current ozone levels threaten gross primary production and yield of Mediterranean annual pastures and nitrogen modulates the response[J]. Atmospheric Environment,2014-01-01,95